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\u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": ["PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"]}], "description_zh": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code class=\"literal\">postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code class=\"literal\">direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym class=\"acronym\">SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span class=\"productname\">PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div class=\"variablelist\"><dl class=\"variablelist\"><dt><span class=\"term\"><code class=\"literal\">postgres</code></span></dt><dd><p>\n           \u6267\u884c <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span class=\"term\"><code class=\"literal\">direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/zh/docs/17/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002", "version": "17", "link_map": {"/zh/docs/17/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION": "/docs/17/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code>postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code>direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym>SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span>PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div><dl><dt><span><code>postgres</code></span></dt><dd><p>\n           \u6267\u884c <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span><code>direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/zh/docs/17/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "577ba74d8ebbba4819bd3c6e267097a4179c87715bd516688b11f7de7c88442a", "content_hash": "b6865c7f0b2d9b6e945c9ddb04bf5e44baf62513506d35a064abcf8188b20d98", "source_database": "center", "source_revision": "58419c9b0dd42cb34c8d53695bb025a7e582edf55ccd4c5bcb1c2c7c71a37487"}, "signature": "sslnegotiation", "tables_zh": [{"key": "environment", "rows": [{"name": {"url": "/docs/17/libpq-envars.html", "text": "PGSSLNEGOTIATION"}, "description": "PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "documented": true, "description": ["\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002"], "environment": [{"name": "PGSSLNEGOTIATION", "source_url": "/docs/17/libpq-envars.html", "description": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter."}], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", 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These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/17/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/17/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults.", "/versions/17/sections/1/paragraphs/0": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter.", "/versions/17/tables/0/columns/0/label": "Variable", "/versions/17/tables/0/columns/1/label": "Documented behavior", "/versions/17/tables/0/rows/0/description": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "4b854cc67421704193eefc764506a8a14dd2c25321f7dcfada9ce3f1ed198e9c", "canonical_center_text_hash": "b6865c7f0b2d9b6e945c9ddb04bf5e44baf62513506d35a064abcf8188b20d98"}, "source_option": {"keyword": "sslnegotiation", "declaration": "\"sslnegotiation\", \"PGSSLNEGOTIATION\", DefaultSSLNegotiation, NULL, \"SSL-Negotiation\", \"\", 9, offsetof(struct pg_conn, sslnegotiation)", "environment": "PGSSLNEGOTIATION", "source_notes": [], "compiled_default_expression": "DefaultSSLNegotiation"}, "description_zh": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002", "comparison_data": {"keyword": "sslnegotiation", "definition": "This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17. postgres perform PostgreSQL protocol negotiation. This is the default if the option is not provided. direct start SSL handshake directly after establishing the TCP/IP connection. This is only allowed with sslmode=require or higher, because the weaker settings could lead to unintended fallback to plaintext authentication when the server does not support direct SSL handshake.", "documented": true, "environment": "PGSSLNEGOTIATION", "default_evidence": ["This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "perform PostgreSQL protocol negotiation. This is the default if the option is not provided."], "compiled_default_expression": "DefaultSSLNegotiation"}, "comparison_hash": "689f6cf691345735854fbeef2bdc05e6e429ffdf8aaab4d9b03c3cc187c1c304", "manual_language": "zh", "default_evidence": ["This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "perform PostgreSQL protocol negotiation. This is the default if the option is not provided."], "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code>postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code>direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym>SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span>PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div><dl><dt><span><code>postgres</code></span></dt><dd><p>\n           \u6267\u884c <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span><code>direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/zh/docs/17/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "precedence_evidence": ["The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."]}, "18": {"facts": [{"label": "\u5ba2\u6237\u7aef\u5e93", "value": "libpq 18.6"}, {"label": "\u624b\u518c\u5b9a\u4e49", "value": "\u624b\u518c\u5df2\u8bb0\u8f7d"}, {"label": "\u6e90\u7801\u4e2d\u7684\u73af\u5883\u53d8\u91cf\u56de\u9000", "value": "PGSSLNEGOTIATION"}, {"label": "\u7f16\u8bd1\u65f6\u56de\u9000\u8868\u8fbe\u5f0f", "value": "DefaultSSLNegotiation"}], "tables": [{"key": "environment", "rows": [{"name": {"url": "/docs/18/libpq-envars.html", "text": "PGSSLNEGOTIATION"}, "description": "PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": 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\u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": ["PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"]}], "description_zh": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code class=\"literal\">postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code class=\"literal\">direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym class=\"acronym\">SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span class=\"productname\">PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div class=\"variablelist\"><dl class=\"variablelist\"><dt><span class=\"term\"><code class=\"literal\">postgres</code></span></dt><dd><p>\n           \u6267\u884c <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span class=\"term\"><code class=\"literal\">direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code class=\"literal\">sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/zh/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002", "version": "18", "link_map": {"/zh/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION": "/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code>postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code>direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym>SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span>PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div><dl><dt><span><code>postgres</code></span></dt><dd><p>\n           \u6267\u884c <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span><code>direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code>sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/zh/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "cac607ce2d1847da95f1fdba71c8e35ae13c75a8d5ef3c077b56759122982272", "content_hash": "c058c495231a29235ea719aacc2d2c2cf27ecd37197f480a9fda7a5c1c13767d", "source_database": "center", "source_revision": "ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8"}, "signature": "sslnegotiation", "tables_zh": [{"key": "environment", "rows": [{"name": {"url": "/docs/18/libpq-envars.html", "text": "PGSSLNEGOTIATION"}, "description": "PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "documented": true, "description": ["\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002"], "environment": [{"name": "PGSSLNEGOTIATION", "source_url": "/docs/18/libpq-envars.html", "description": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter."}], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": ["PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"]}], "localization": {"status": "complete", "sources": [{"url": "/docs/18/libpq-connect.html", "method": "same-major semantic node", "sha256": "bae58c13a65be235aa0408ef12f8bcc7e48f2908cd71080a7dedec225a74c083", "language": "zh", "matched_nodes": ["#LIBPQ-CONNECT/div[7]/div[2]/dl[0]/dd[47]/div[1]/dl[0]/dd[1]", "#LIBPQ-CONNECT/div[7]/div[2]/dl[0]/dd[47]/div[1]/dl[0]/dd[3]"]}, {"url": "/docs/18/libpq-envars.html", "method": "same-major semantic node", "sha256": "8423affb67ef7d4f700d7ccc8c0ef66629341568c8d72530a0c765f3d155da2f", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/div[3]/ul[0]/li[1]", "#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/18/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "a06dfcdffbbdf6bd55987cade2d9ff1db6cbfd9f75eb80c7866e8792cd70463e", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/versions/18/description/0": "This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "/versions/18/facts/0/label": "Client library", "/versions/18/facts/1/label": "Manual definition", "/versions/18/facts/1/value": "Documented", "/versions/18/facts/2/label": "Source environment fallback", "/versions/18/facts/3/label": "Compiled fallback expression", "/versions/18/tables/0/title": "Environment fallback", "/versions/18/related/0/label": "Connection service file", "/versions/18/related/1/label": "Password file", "/versions/18/related/2/label": "All libpq environment variables", "/versions/18/sections/0/title": "Default resolution and service-file precedence", "/versions/18/sections/1/title": "Environment variable evidence", "/versions/18/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/18/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/18/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults.", "/versions/18/sections/1/paragraphs/0": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter.", "/versions/18/tables/0/columns/0/label": "Variable", "/versions/18/tables/0/columns/1/label": "Documented behavior", "/versions/18/tables/0/rows/0/description": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "efcc7176896aee3d006e520dbc49021c3e53d5fb0af7ba549f4220fe27bfc462", "canonical_center_text_hash": "c058c495231a29235ea719aacc2d2c2cf27ecd37197f480a9fda7a5c1c13767d"}, "source_option": {"keyword": "sslnegotiation", "declaration": "\"sslnegotiation\", \"PGSSLNEGOTIATION\", DefaultSSLNegotiation, NULL, \"SSL-Negotiation\", \"\", 9, offsetof(struct pg_conn, sslnegotiation)", "environment": "PGSSLNEGOTIATION", "source_notes": [], "compiled_default_expression": "DefaultSSLNegotiation"}, "description_zh": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002", "comparison_data": {"keyword": "sslnegotiation", "definition": "This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17. postgres perform PostgreSQL protocol negotiation. This is the default if the option is not provided. direct start SSL handshake directly after establishing the TCP/IP connection. This is only allowed with sslmode=require or higher, because the weaker settings could lead to unintended fallback to plaintext authentication when the server does not support direct SSL handshake.", "documented": true, "environment": "PGSSLNEGOTIATION", "default_evidence": ["This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "perform PostgreSQL protocol negotiation. This is the default if the option is not provided."], "compiled_default_expression": "DefaultSSLNegotiation"}, "comparison_hash": "689f6cf691345735854fbeef2bdc05e6e429ffdf8aaab4d9b03c3cc187c1c304", "manual_language": "zh", "default_evidence": ["This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "perform PostgreSQL protocol negotiation. This is the default if the option is not provided."], "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code>postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code>direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym>SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span>PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div><dl><dt><span><code>postgres</code></span></dt><dd><p>\n           \u6267\u884c <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span><code>direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code>sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/zh/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "precedence_evidence": ["The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."], "center_zh_rendered": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code>postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code>direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span>PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div><dl><dt><span><code>postgres</code></span></dt><dd><p>\n           \u6267\u884c <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span><code>direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code>sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "19": {"lang": "zh", "facts": [{"label": "\u5ba2\u6237\u7aef\u5e93", "value": "libpq 19rc2"}, {"label": "\u624b\u518c\u5b9a\u4e49", "value": "\u624b\u518c\u5df2\u8bb0\u8f7d"}, {"label": "\u6e90\u7801\u4e2d\u7684\u73af\u5883\u53d8\u91cf\u56de\u9000", "value": "PGSSLNEGOTIATION"}, {"label": "\u7f16\u8bd1\u65f6\u56de\u9000\u8868\u8fbe\u5f0f", "value": "DefaultSSLNegotiation"}], "tables": [{"key": "environment", "rows": [{"name": {"url": "/docs/19/libpq-envars.html", "text": "PGSSLNEGOTIATION"}, "description": "PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "keyword": "sslnegotiation", "related": [{"url": "/docs/19/libpq-pgservice.html", "label": "\u8fde\u63a5\u670d\u52a1\u6587\u4ef6"}, {"url": "/docs/19/libpq-pgpass.html", "label": "\u53e3\u4ee4\u6587\u4ef6"}, {"url": "/docs/19/libpq-envars.html", "label": "\u6240\u6709 libpq \u73af\u5883\u53d8\u91cf"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v19rc2/postgresql-19rc2.tar.bz2", "label": "19rc2", "major": "19", "channel": "preview", "manifest": {"major": "19", "release": "19rc2", "source_url": "https://ftp.postgresql.org/pub/source/v19rc2/postgresql-19rc2.tar.bz2", "source_sha256": "23a7bb862e4bac395c047305ed0084117b01e71255ce858b907cdcd78ce40351"}, "revision": "cd49a2a98fed04eec7571858125796f86e63613d1985225049f2aa8b0955f256", "evidence_kind": "English manual and source declarations", "source_sha256": "23a7bb862e4bac395c047305ed0084117b01e71255ce858b907cdcd78ce40351"}, "sources": [{"url": "/docs/19/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION", "file": "libpq-connect.html", "label": "19rc2 English manual \u00b7 libpq-connect.html", "anchor": "LIBPQ-CONNECT-SSLNEGOTIATION", "sha256": "0a9acc6fe923f679e1c29b9c9e055af343b9f18d57000d0d2f105b792e7a8639"}, {"url": "https://ftp.postgresql.org/pub/source/v19rc2/postgresql-19rc2.tar.bz2", "file": "src/interfaces/libpq/fe-connect.c", "label": "19rc2 libpq connection option declarations", "sha256": "8c1ead9bb7a0fbbbc752d1ed9198e99b07c834495e502549309d0765d0bbf041", "archive_sha256": "23a7bb862e4bac395c047305ed0084117b01e71255ce858b907cdcd78ce40351"}, {"url": "/docs/19/libpq-envars.html", "file": "libpq-envars.html", "label": "19rc2 English manual \u00b7 libpq-envars.html", "anchor": "", "sha256": "af62a12e22e80fff7cb75a6a7760562861c414f73a4afbd5ec2e1c2f1e9c94b9"}, {"url": "/docs/19/libpq-pgservice.html", "file": "libpq-pgservice.html", "label": "19rc2 English manual \u00b7 libpq-pgservice.html", "anchor": "", "sha256": "eb83c4af16f3d34aa873fc313fdf55560bbdf1803d195d723e6eb88c9d8dcea4"}], "zh_from": "same-version-manual", "facts_zh": [{"label": "\u5ba2\u6237\u7aef\u5e93", "value": "libpq 19rc2"}, {"label": "\u624b\u518c\u5b9a\u4e49", "value": "\u624b\u518c\u5df2\u8bb0\u8f7d"}, {"label": "\u6e90\u7801\u4e2d\u7684\u73af\u5883\u53d8\u91cf\u56de\u9000", "value": "PGSSLNEGOTIATION"}, {"label": "\u7f16\u8bd1\u65f6\u56de\u9000\u8868\u8fbe\u5f0f", "value": "DefaultSSLNegotiation"}], "sections": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728 Microsoft Windows \u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": ["PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"]}], "center_zh": {"locale": "zh-Hans", "payload": {"description_zh": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002", "description_zh_html": "<dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code class=\"literal\">postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code class=\"literal\">direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym class=\"acronym\">SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span class=\"productname\">PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div class=\"variablelist\"><dl class=\"variablelist\"><dt><span class=\"term\"><code class=\"literal\">postgres</code></span></dt><dd><p>\n           \u6267\u884c <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span class=\"term\"><code class=\"literal\">direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code class=\"literal\">sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd>"}, "summary": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002", "body_html": "<dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code class=\"literal\">postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code class=\"literal\">direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym class=\"acronym\">SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span class=\"productname\">PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div class=\"variablelist\"><dl class=\"variablelist\"><dt><span class=\"term\"><code class=\"literal\">postgres</code></span></dt><dd><p>\n           \u6267\u884c <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span class=\"term\"><code class=\"literal\">direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code class=\"literal\">sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd>", "body_sha256": "cfdcbbc911feeecc8f22789b3459fa270b5fbe18c36636d342dff19b103c9f9b", "content_hash": "d452db7022357dafa8aa9997bc3e8c92c0ca645cb7a6999adc7c03d9fddee82b", "source_revision": "pgdoc:b9f0e7232f60f380d642ac9b99226606c254b552", "definition_version": "19", "documentation_release": "19rc2"}, "signature": "sslnegotiation", "tables_zh": [{"key": "environment", "rows": [{"name": {"url": "/docs/19/libpq-envars.html", "text": "PGSSLNEGOTIATION"}, "description": "PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "documented": true, "related_zh": [{"url": "/docs/19/libpq-pgservice.html", "label": "\u8fde\u63a5\u670d\u52a1\u6587\u4ef6"}, {"url": "/docs/19/libpq-pgpass.html", "label": "\u53e3\u4ee4\u6587\u4ef6"}, {"url": "/docs/19/libpq-envars.html", "label": "\u6240\u6709 libpq \u73af\u5883\u53d8\u91cf"}], "description": ["\u4f7f\u7528 SSL \u65f6\uff0c\u6b64\u9009\u9879\u63a7\u5236\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u7684\u65b9\u5f0f\u3002\u9ed8\u8ba4 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1bdirect \u6a21\u5f0f\u4e0b\uff0c\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u7acb\u5373\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf PostgreSQL \u534f\u8bae\u534f\u5546\u5bf9\u4e0d\u540c\u670d\u52a1\u5668\u914d\u7f6e\u7684\u9002\u5e94\u6027\u6700\u5f3a\u3002\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219 direct \u53ef\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u8fd8\u53ef\u4f7f\u7528\u4e0d\u8bc6\u522b PostgreSQL \u534f\u8bae\u7684\u901a\u7528 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u4ece PostgreSQL 17 \u5f15\u5165\u3002"], "environment": [{"name": "PGSSLNEGOTIATION", "source_url": "/docs/19/libpq-envars.html", "description": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter."}], "manual_html": "<dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code class=\"literal\">postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code class=\"literal\">direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym class=\"acronym\">SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span class=\"productname\">PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div class=\"variablelist\"><dl class=\"variablelist\"><dt><span class=\"term\"><code class=\"literal\">postgres</code></span></dt><dd><p>\n           \u6267\u884c <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span class=\"term\"><code class=\"literal\">direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code class=\"literal\">sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd>", "manual_path": "libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728 Microsoft Windows \u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": ["PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"]}], "localization": {"status": "same-version-reviewed-manual", "language": "zh", "source_language": "en", "source_revision": "pgdoc:b9f0e7232f60f380d642ac9b99226606c254b552", "documentation_release": "19rc2"}, "source_option": {"keyword": "sslnegotiation", "declaration": "\"sslnegotiation\", \"PGSSLNEGOTIATION\", DefaultSSLNegotiation, NULL, \"SSL-Negotiation\", \"\", 9, offsetof(struct pg_conn, sslnegotiation)", "environment": "PGSSLNEGOTIATION", "source_notes": [], "compiled_default_expression": "DefaultSSLNegotiation"}, "description_zh": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002", "comparison_data": {"keyword": "sslnegotiation", "definition": "This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17. postgres perform PostgreSQL protocol negotiation. This is the default if the option is not provided. direct start SSL handshake directly after establishing the TCP/IP connection. This is only allowed with sslmode=require or higher, because the weaker settings could lead to unintended fallback to plaintext authentication when the server does not support direct SSL handshake.", "documented": true, "environment": "PGSSLNEGOTIATION", "default_evidence": ["This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "perform PostgreSQL protocol negotiation. This is the default if the option is not provided."], "compiled_default_expression": "DefaultSSLNegotiation"}, "comparison_hash": "689f6cf691345735854fbeef2bdc05e6e429ffdf8aaab4d9b03c3cc187c1c304", "manual_language": "zh", "default_evidence": ["This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "perform PostgreSQL protocol negotiation. This is the default if the option is not provided."], "description_zh_html": "<dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code class=\"literal\">postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code class=\"literal\">direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym class=\"acronym\">SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span class=\"productname\">PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div class=\"variablelist\"><dl class=\"variablelist\"><dt><span class=\"term\"><code class=\"literal\">postgres</code></span></dt><dd><p>\n           \u6267\u884c <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span class=\"term\"><code class=\"literal\">direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code class=\"literal\">sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd>", "precedence_evidence": ["The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."], "source_revalidation": {"kind": "static-same-version-source-and-manual-replay", "audit": "wiki-audit-20261023", "runtime_rerun": false, "compared_fields": "entity membership and source-derived facts; presentation markup normalized", "source_revision": "5e06fe0541cd1f62a9fc1a66c342c19a2944ff3c98281bfbdb1d4a6d6d53fe2f", "previous_source_revision": "1bbbbf4133d426f0e4304010688d2984c30fb67df0cc3a61b3e37eb3f6f37833"}, "documentation_revision": {"inputs": [{"file": "libpq-connect.html", "kind": "same-version-reviewed-manual", "locale": "en", "sha256": "0a9acc6fe923f679e1c29b9c9e055af343b9f18d57000d0d2f105b792e7a8639", "version": "19rc2"}, {"file": "libpq-envars.html", "kind": "same-version-reviewed-manual", "locale": "en", "sha256": 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\u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code class=\"literal\">postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code class=\"literal\">direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym class=\"acronym\">SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span class=\"productname\">PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div class=\"variablelist\"><dl class=\"variablelist\"><dt><span class=\"term\"><code class=\"literal\">postgres</code></span></dt><dd><p>\n           \u6267\u884c <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span class=\"term\"><code class=\"literal\">direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code class=\"literal\">sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/zh/docs/devel/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002", "version": "20", "link_map": {"/zh/docs/devel/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION": "/docs/devel/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code>postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code>direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym>SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span>PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div><dl><dt><span><code>postgres</code></span></dt><dd><p>\n           \u6267\u884c <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span><code>direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code>sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/zh/docs/devel/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "dd121fdb5229f32c4ab43ffb242f5d3766482bfaaea416cc38ab24a2b6dd30a2", "content_hash": "041fea6da778891651c9d055cd899ed77d17fbe49affb066a1619569f76d9c70", "source_database": "center", "source_revision": "3cd0885bb4eccdbaac1a21177cc639e9031e54bd8ea6536c45224b5563354ce2"}, "signature": "sslnegotiation", "tables_zh": [{"key": "environment", "rows": [{"name": {"url": "/docs/devel/libpq-envars.html", "text": "PGSSLNEGOTIATION"}, "description": "PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "documented": true, "description": ["\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002"], "environment": [{"name": "PGSSLNEGOTIATION", "source_url": "/docs/devel/libpq-envars.html", "description": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter."}], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u5728 libpq \u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u4f7f\u7528 servicefile \u5173\u952e\u5b57\uff0c\u6216\u8005\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": ["PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"]}], "localization": {"status": "complete", "sources": [{"url": "/docs/devel/libpq-connect.html", "method": "same-major semantic node", "sha256": "80a1ddba976c7228bb9d179e08545f0a6328ffc9b880481df17a53fdebf42bb5", "language": "zh", "matched_nodes": ["#LIBPQ-CONNECT/div[7]/div[2]/dl[0]/dd[47]/div[1]/dl[0]/dd[1]", "#LIBPQ-CONNECT/div[7]/div[2]/dl[0]/dd[47]/div[1]/dl[0]/dd[3]"]}, {"url": "/docs/devel/libpq-envars.html", "method": "same-major semantic node", "sha256": "b4afd6d100d2be289d48e1a6f6fb9804dd0b684798b7dabf8bae7d3db074117f", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/div[3]/ul[0]/li[1]", "#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/devel/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "acea589bbba517979fe815bd3bff32cd6d5e6323e1d5b4f395d7864338868b26", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/summary": "This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "/versions/20/description/0": "This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "/versions/20/facts/0/label": "Client library", "/versions/20/facts/1/label": "Manual definition", "/versions/20/facts/1/value": "Documented", "/versions/20/facts/2/label": "Source environment fallback", "/versions/20/facts/3/label": "Compiled fallback expression", "/versions/20/tables/0/title": "Environment fallback", "/versions/20/related/0/label": "Connection service file", "/versions/20/related/1/label": "Password file", "/versions/20/related/2/label": "All libpq environment variables", "/versions/20/sections/0/title": "Default resolution and service-file precedence", "/versions/20/sections/1/title": "Environment variable evidence", "/versions/20/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/20/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified using the servicefile key word in a libpq connection string or by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/20/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults.", "/versions/20/sections/1/paragraphs/0": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter.", "/versions/20/tables/0/columns/0/label": "Variable", "/versions/20/tables/0/columns/1/label": "Documented behavior", "/versions/20/tables/0/rows/0/description": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "30c1740435ff4cc461cea75a67aea9bccb024382c1a208f40799ce4ed91b85b4", "canonical_center_text_hash": "041fea6da778891651c9d055cd899ed77d17fbe49affb066a1619569f76d9c70"}, "source_option": {"keyword": "sslnegotiation", "declaration": "\"sslnegotiation\", \"PGSSLNEGOTIATION\", DefaultSSLNegotiation, NULL, \"SSL-Negotiation\", \"\", 9, offsetof(struct pg_conn, sslnegotiation)", "environment": "PGSSLNEGOTIATION", "source_notes": [], "compiled_default_expression": "DefaultSSLNegotiation"}, "description_zh": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002", "comparison_data": {"keyword": "sslnegotiation", "definition": "This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17. postgres perform PostgreSQL protocol negotiation. This is the default if the option is not provided. direct start SSL handshake directly after establishing the TCP/IP connection. This is only allowed with sslmode=require or higher, because the weaker settings could lead to unintended fallback to plaintext authentication when the server does not support direct SSL handshake.", "documented": true, "environment": "PGSSLNEGOTIATION", "default_evidence": ["This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "perform PostgreSQL protocol negotiation. This is the default if the option is not provided."], "compiled_default_expression": "DefaultSSLNegotiation"}, "comparison_hash": "689f6cf691345735854fbeef2bdc05e6e429ffdf8aaab4d9b03c3cc187c1c304", "manual_language": "zh", "default_evidence": ["This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "perform PostgreSQL protocol negotiation. This is the default if the option is not provided."], "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code>postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code>direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym>SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span>PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div><dl><dt><span><code>postgres</code></span></dt><dd><p>\n           \u6267\u884c <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span><code>direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code>sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/zh/docs/devel/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "precedence_evidence": ["The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified using the servicefile key word in a libpq connection string or by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. 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\u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": ["PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"]}], "description_zh": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code class=\"literal\">postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code class=\"literal\">direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym class=\"acronym\">SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span class=\"productname\">PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div class=\"variablelist\"><dl class=\"variablelist\"><dt><span class=\"term\"><code class=\"literal\">postgres</code></span></dt><dd><p>\n           \u6267\u884c <span class=\"productname\">PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span class=\"term\"><code class=\"literal\">direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code class=\"literal\">sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/zh/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002", "version": "18", "link_map": {"/zh/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION": "/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code>postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code>direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym>SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span>PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div><dl><dt><span><code>postgres</code></span></dt><dd><p>\n           \u6267\u884c <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span><code>direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code>sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/zh/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "cac607ce2d1847da95f1fdba71c8e35ae13c75a8d5ef3c077b56759122982272", "content_hash": "c058c495231a29235ea719aacc2d2c2cf27ecd37197f480a9fda7a5c1c13767d", "source_database": "center", "source_revision": "ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8"}, "signature": "sslnegotiation", "tables_zh": [{"key": "environment", "rows": [{"name": {"url": "/docs/18/libpq-envars.html", "text": "PGSSLNEGOTIATION"}, "description": "PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "documented": true, "description": ["\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002"], "environment": [{"name": "PGSSLNEGOTIATION", "source_url": "/docs/18/libpq-envars.html", "description": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter."}], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", 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\u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": ["PGSSLNEGOTIATION \u7684\u884c\u4e3a\u4e0e sslnegotiation \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"]}], "localization": {"status": "complete", "sources": [{"url": "/docs/18/libpq-connect.html", "method": "same-major semantic node", "sha256": "bae58c13a65be235aa0408ef12f8bcc7e48f2908cd71080a7dedec225a74c083", "language": "zh", "matched_nodes": ["#LIBPQ-CONNECT/div[7]/div[2]/dl[0]/dd[47]/div[1]/dl[0]/dd[1]", "#LIBPQ-CONNECT/div[7]/div[2]/dl[0]/dd[47]/div[1]/dl[0]/dd[3]"]}, {"url": "/docs/18/libpq-envars.html", "method": "same-major semantic node", "sha256": "8423affb67ef7d4f700d7ccc8c0ef66629341568c8d72530a0c765f3d155da2f", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/div[3]/ul[0]/li[1]", "#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/18/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "a06dfcdffbbdf6bd55987cade2d9ff1db6cbfd9f75eb80c7866e8792cd70463e", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/versions/18/description/0": "This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "/versions/18/facts/0/label": "Client library", "/versions/18/facts/1/label": "Manual definition", "/versions/18/facts/1/value": "Documented", "/versions/18/facts/2/label": "Source environment fallback", "/versions/18/facts/3/label": "Compiled fallback expression", "/versions/18/tables/0/title": "Environment fallback", "/versions/18/related/0/label": "Connection service file", "/versions/18/related/1/label": "Password file", "/versions/18/related/2/label": "All libpq environment variables", "/versions/18/sections/0/title": "Default resolution and service-file precedence", "/versions/18/sections/1/title": "Environment variable evidence", "/versions/18/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/18/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/18/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults.", "/versions/18/sections/1/paragraphs/0": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter.", "/versions/18/tables/0/columns/0/label": "Variable", "/versions/18/tables/0/columns/1/label": "Documented behavior", "/versions/18/tables/0/rows/0/description": "PGSSLNEGOTIATION behaves the same as the sslnegotiation connection parameter."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "efcc7176896aee3d006e520dbc49021c3e53d5fb0af7ba549f4220fe27bfc462", "canonical_center_text_hash": "c058c495231a29235ea719aacc2d2c2cf27ecd37197f480a9fda7a5c1c13767d"}, "source_option": {"keyword": "sslnegotiation", "declaration": "\"sslnegotiation\", \"PGSSLNEGOTIATION\", DefaultSSLNegotiation, NULL, \"SSL-Negotiation\", \"\", 9, offsetof(struct pg_conn, sslnegotiation)", "environment": "PGSSLNEGOTIATION", "source_notes": [], "compiled_default_expression": "DefaultSSLNegotiation"}, "description_zh": "\u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 postgres \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 direct \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 PostgreSQL \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 PostgreSQL 17 \u4e2d\u5f15\u5165\u7684\u3002 postgres \u6267\u884c PostgreSQL \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002 direct \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 sslmode=require \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002", "comparison_data": {"keyword": "sslnegotiation", "definition": "This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17. postgres perform PostgreSQL protocol negotiation. This is the default if the option is not provided. direct start SSL handshake directly after establishing the TCP/IP connection. This is only allowed with sslmode=require or higher, because the weaker settings could lead to unintended fallback to plaintext authentication when the server does not support direct SSL handshake.", "documented": true, "environment": "PGSSLNEGOTIATION", "default_evidence": ["This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "perform PostgreSQL protocol negotiation. This is the default if the option is not provided."], "compiled_default_expression": "DefaultSSLNegotiation"}, "comparison_hash": "689f6cf691345735854fbeef2bdc05e6e429ffdf8aaab4d9b03c3cc187c1c304", "manual_language": "zh", "default_evidence": ["This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.", "perform PostgreSQL protocol negotiation. This is the default if the option is not provided."], "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code>postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code>direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 <acronym>SSL</acronym> \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span>PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div><dl><dt><span><code>postgres</code></span></dt><dd><p>\n           \u6267\u884c <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span><code>direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code>sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/zh/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "precedence_evidence": ["The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."], "center_zh_rendered": "<p>\u8fde\u63a5\u53c2\u6570 sslnegotiation\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n        \u5982\u679c\u4f7f\u7528 SSL\uff0c\u6b64\u9009\u9879\u63a7\u5236\u5982\u4f55\u4e0e\u670d\u52a1\u5668\u534f\u5546 SSL \u52a0\u5bc6\u3002\u5728\u9ed8\u8ba4\u7684 <code>postgres</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u652f\u6301 SSL\uff1b\u5728 <code>direct</code> \u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb\u6807\u51c6 SSL \u63e1\u624b\u3002\u4f20\u7edf\u7684 <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u80fd\u517c\u5bb9\u66f4\u591a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u914d\u7f6e\uff1b\u5982\u679c\u5df2\u77e5\u670d\u52a1\u5668\u652f\u6301\u76f4\u63a5 SSL \u8fde\u63a5\uff0c\u5219\u540e\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u51cf\u5c11\u4e00\u6b21\u5f80\u8fd4\uff0c\u4ece\u800c\u964d\u4f4e\u8fde\u63a5\u5ef6\u8fdf\uff0c\u4e5f\u5141\u8bb8\u4f7f\u7528\u4e0e\u534f\u8bae\u65e0\u5173\u7684 SSL \u7f51\u7edc\u5de5\u5177\u3002\u76f4\u63a5 SSL \u9009\u9879\u662f\u5728 <span>PostgreSQL</span> 17 \u4e2d\u5f15\u5165\u7684\u3002\n       </p><div><dl><dt><span><code>postgres</code></span></dt><dd><p>\n           \u6267\u884c <span>PostgreSQL</span> \u534f\u8bae\u534f\u5546\u3002\u5982\u679c\u672a\u63d0\u4f9b\u8be5\u9009\u9879\uff0c\u8fd9\u662f\u9ed8\u8ba4\u503c\u3002\n          </p></dd><dt><span><code>direct</code></span></dt><dd><p>\n           \u5728\u5efa\u7acb TCP/IP \u8fde\u63a5\u540e\u76f4\u63a5\u5f00\u59cb SSL \u63e1\u624b\u3002\u4ec5\u5f53 <code>sslmode=require</code> \u6216\u66f4\u9ad8\u65f6\u624d\u5141\u8bb8\u4f7f\u7528\u8be5\u6a21\u5f0f\uff0c\u56e0\u4e3a\u66f4\u5f31\u7684\u8bbe\u7f6e\u53ef\u80fd\u5728\u670d\u52a1\u5668\u4e0d\u652f\u6301\u76f4\u63a5 SSL \u63e1\u624b\u65f6\u5bfc\u81f4\u610f\u5916\u56de\u9000\u5230\u660e\u6587\u8ba4\u8bc1\u3002\n          </p></dd></dl></div></dd><p><a href=\"/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "comparison": {"left": "16", "right": "17", "status": "added", "diff": "--- PostgreSQL 16\n+++ PostgreSQL 17\n@@ -1 +1,11 @@\n-\u8be5\u7248\u672a\u6536\u5f55\n+{\n+  \"compiled_default_expression\": \"DefaultSSLNegotiation\",\n+  \"default_evidence\": [\n+    \"This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17.\",\n+    \"perform PostgreSQL protocol negotiation. This is the default if the option is not provided.\"\n+  ],\n+  \"definition\": \"This option controls how SSL encryption is negotiated with the server, if SSL is used. In the default postgres mode, the client first asks the server if SSL is supported. In direct mode, the client starts the standard SSL handshake directly after establishing the TCP/IP connection. Traditional PostgreSQL protocol negotiation is the most flexible with different server configurations. If the server is known to support direct SSL connections then the latter requires one fewer round trip reducing connection latency and also allows the use of protocol agnostic SSL network tools. The direct SSL option was introduced in PostgreSQL version 17. postgres perform PostgreSQL protocol negotiation. This is the default if the option is not provided. direct start SSL handshake directly after establishing the TCP/IP connection. This is only allowed with sslmode=require or higher, because the weaker settings could lead to unintended fallback to plaintext authentication when the server does not support direct SSL handshake.\",\n+  \"documented\": true,\n+  \"environment\": \"PGSSLNEGOTIATION\",\n+  \"keyword\": \"sslnegotiation\"\n+}"}}