{"id":390,"date":"2026-10-24T02:14:25","date_gmt":"2026-10-24T02:14:25","guid":{"rendered":"https:\/\/ntokenx.com\/blog\/index.php\/2026\/10\/24\/langchain-js-gateway\/"},"modified":"2026-10-24T02:14:25","modified_gmt":"2026-10-24T02:14:25","slug":"langchain-js-gateway","status":"publish","type":"post","link":"https:\/\/ntokenx.com\/blog\/index.php\/2026\/10\/24\/langchain-js-gateway\/","title":{"rendered":"LangChain.js\u63a5\u5165\u7b2c\u4e09\u65b9\u5927\u6a21\u578b\u4ee3\u7406\u7f51\u5173\uff1a\u9274\u6743\u3001Base URL\u4e0e\u6392\u9519"},"content":{"rendered":"<p><em>\u4f5c\u8005\uff1anTokenX\uff5c\u53d1\u5e03\u65e5\u671f\uff1a2026-10-24\uff5c\u66f4\u65b0\u65e5\u671f\uff1a2026-10-24<\/em><\/p>\n<p>LangChain.js\u63a5\u5165\u7b2c\u4e09\u65b9\u5927\u6a21\u578b\u4ee3\u7406\u7f51\u5173\uff0c\u6838\u5fc3\u4e0d\u662f\u4fee\u6539 LangChain \u7684\u94fe\u8def\u903b\u8f91\uff0c\u800c\u662f\u8ba9 <code>ChatOpenAI<\/code> \u6216 <code>initChatModel<\/code> \u6307\u5411\u517c\u5bb9 OpenAI Chat Completions \u534f\u8bae\u7684 <code>Base URL<\/code>\uff0c\u518d\u4f7f\u7528\u7f51\u5173\u5206\u914d\u7684 API Key \u548c\u6a21\u578b\u540d\u5b8c\u6210\u9274\u6743\u3002\u8fd9\u6837\u53ef\u4ee5\u5728\u4e0d\u91cd\u5199 Prompt\u3001Agent \u6216 RAG \u6d41\u7a0b\u7684\u524d\u63d0\u4e0b\u5207\u6362\u6a21\u578b\u5165\u53e3\u3002<\/p>\n<figure class=\"wp-block-image size-large\" style=\"margin:1.5em 0;\"><img decoding=\"async\" src=\"https:\/\/ntokenx.com\/blog\/wp-content\/uploads\/2026\/10\/backend-7913-1.jpg\" alt=\"LangChain.js\u63a5\u5165\u7b2c\u4e09\u65b9\u5927\u6a21\u578b\u4ee3\u7406\u7f51\u5173\u914d\u7f6e\u793a\u610f\u56fe\" style=\"max-width:100%;height:auto;\"><\/figure>\n<p>\u672c\u6587\u7ed9\u51fa\u4e00\u5957\u9002\u7528\u4e8e Node.js\u3001Next.js \u670d\u52a1\u7aef\u548c\u72ec\u7acb TypeScript \u9879\u76ee\u7684\u63a5\u5165\u65b9\u6cd5\uff0c\u5e76\u91cd\u70b9\u8bf4\u660e\u4ee3\u7406\u7f51\u5173\u6700\u5bb9\u6613\u88ab\u5ffd\u7565\u7684\u534f\u8bae\u517c\u5bb9\u3001\u5bc6\u94a5\u9694\u79bb\u3001\u6a21\u578b\u540d\u79f0\u6620\u5c04\u548c\u9519\u8bef\u91cd\u8bd5\u95ee\u9898\u3002<\/p>\n<h2>\u4ec0\u4e48\u662f\u7b2c\u4e09\u65b9\u5927\u6a21\u578b\u4ee3\u7406\u7f51\u5173<\/h2>\n<p>\u7b2c\u4e09\u65b9\u5927\u6a21\u578b\u4ee3\u7406\u7f51\u5173\uff0c\u662f\u4f4d\u4e8e LangChain \u5e94\u7528\u4e0e\u6a21\u578b\u670d\u52a1\u4e4b\u95f4\u7684\u7edf\u4e00 API \u5c42\u3002\u5b83\u901a\u5e38\u63a5\u6536\u6807\u51c6\u5316\u8bf7\u6c42\uff0c\u518d\u8f6c\u53d1\u5230\u4e00\u4e2a\u6216\u591a\u4e2a\u6a21\u578b\u63d0\u4f9b\u65b9\uff0c\u5411\u5e94\u7528\u8fd4\u56de\u517c\u5bb9\u683c\u5f0f\u7684\u54cd\u5e94\u3002<\/p>\n<p>\u8fd9\u7c7b\u5e73\u53f0\u5927\u81f4\u5206\u4e3a\u4e24\u79cd\uff1a<\/p>\n<div style=\"overflow-x:auto;\">\n<table style=\"width:100%;border-collapse:collapse;margin:1.5em 0;font-size:0.95em;\">\n<thead>\n<tr>\n<th style=\"border:1px solid #e3e6ea;padding:8px 12px;background:#f6f8fa;text-align:left;font-weight:600;\">\u7c7b\u578b<\/th>\n<th style=\"border:1px solid #e3e6ea;padding:8px 12px;background:#f6f8fa;text-align:left;font-weight:600;\">Key \u6765\u6e90<\/th>\n<th style=\"border:1px solid #e3e6ea;padding:8px 12px;background:#f6f8fa;text-align:left;font-weight:600;\">\u5e73\u53f0\u4e3b\u8981\u804c\u8d23<\/th>\n<th style=\"border:1px solid #e3e6ea;padding:8px 12px;background:#f6f8fa;text-align:left;font-weight:600;\">\u9700\u8981\u91cd\u70b9\u786e\u8ba4<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #e3e6ea;padding:8px 12px;vertical-align:top;\">API \u805a\u5408\u6216\u7edf\u4e00\u7f51\u5173<\/td>\n<td style=\"border:1px solid #e3e6ea;padding:8px 12px;vertical-align:top;\">\u7528\u6237\u7ed1\u5b9a\u81ea\u5df1\u7684\u6a21\u578b\u5382\u5546 Key<\/td>\n<td style=\"border:1px solid #e3e6ea;padding:8px 12px;vertical-align:top;\">\u7edf\u4e00\u8f6c\u53d1\u3001\u8ba1\u8d39\u548c\u76d1\u63a7<\/td>\n<td style=\"border:1px solid #e3e6ea;padding:8px 12px;vertical-align:top;\">Key \u662f\u5426\u7531\u7528\u6237\u638c\u63a7\u3001\u65e5\u5fd7\u5982\u4f55\u4fdd\u5b58<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #e3e6ea;padding:8px 12px;vertical-align:top;\">\u7b2c\u4e09\u65b9\u6a21\u578b\u4e2d\u8f6c<\/td>\n<td style=\"border:1px solid #e3e6ea;padding:8px 12px;vertical-align:top;\">\u5e73\u53f0\u91c7\u8d2d\u6216\u4ee3\u7406\u6a21\u578b\u989d\u5ea6<\/td>\n<td style=\"border:1px solid #e3e6ea;padding:8px 12px;vertical-align:top;\">\u7edf\u4e00 API\u3001\u989d\u5ea6\u7ba1\u7406\u548c\u8def\u7531<\/td>\n<td style=\"border:1px solid #e3e6ea;padding:8px 12px;vertical-align:top;\">\u6388\u6743\u8303\u56f4\u3001\u7a33\u5b9a\u6027\u3001\u6570\u636e\u5904\u7406\u65b9\u5f0f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u63a5\u5165\u524d\u4e0d\u8981\u53ea\u770b\u201c\u662f\u5426\u517c\u5bb9 OpenAI\u201d\u3002\u8fd8\u5e94\u786e\u8ba4\u6a21\u578b\u6388\u6743\u3001\u6570\u636e\u4fdd\u7559\u3001\u65e5\u5fd7\u8bbf\u95ee\u3001\u9519\u8bef\u683c\u5f0f\u3001\u901f\u7387\u9650\u5236\u548c\u670d\u52a1\u5546\u8d23\u4efb\u8fb9\u754c\u3002\u5bf9\u4e8e\u751f\u4ea7\u73af\u5883\uff0c\u5efa\u8bae\u4f18\u5148\u9009\u62e9\u80fd\u591f\u660e\u786e\u8bf4\u660e\u6388\u6743\u4e0e\u6570\u636e\u5904\u7406\u89c4\u5219\u7684\u591a\u6a21\u578b API \u805a\u5408\u5e73\u53f0\u6216\u7edf\u4e00\u5927\u6a21\u578b API\u3002<\/p>\n<h2>LangChain.js\u652f\u6301\u54ea\u4e9b\u63a5\u5165\u65b9\u5f0f<\/h2>\n<p>LangChain.js\u4e2d\u6700\u5e38\u7528\u7684\u662f <code>@langchain\/openai<\/code> \u63d0\u4f9b\u7684 <code>ChatOpenAI<\/code>\u3002\u5b98\u65b9\u53c2\u8003\u6587\u6863\u652f\u6301\u901a\u8fc7 <code>configuration.baseURL<\/code> \u81ea\u5b9a\u4e49\u8bf7\u6c42\u5730\u5740\uff1b\u5bf9\u4e8e\u5b9e\u73b0 OpenAI Chat Completions API \u7684\u670d\u52a1\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7 <code>baseUrl<\/code> \u914d\u7f6e\u7edf\u4e00\u6a21\u578b\u5165\u53e3\u3002(<a href=\"https:\/\/reference.langchain.com\/javascript\/langchain-openai\/ChatOpenAI\">reference.langchain.com<\/a>)<\/p>\n<p>\u5e38\u89c1\u9009\u62e9\u6709\u4e24\u79cd\uff1a<\/p>\n<ol>\n<li><strong>\u76f4\u63a5\u5b9e\u4f8b\u5316 <code>ChatOpenAI<\/code><\/strong>\uff1a\u9002\u5408\u5df2\u6709 LangChain.js \u9879\u76ee\uff0c\u6539\u52a8\u5c11\u3002<\/li>\n<li><strong>\u4f7f\u7528 <code>initChatModel<\/code><\/strong>\uff1a\u9002\u5408\u9700\u8981\u6309\u914d\u7f6e\u5207\u6362\u6a21\u578b\u4f9b\u5e94\u5546\u3001\u7edf\u4e00\u7ba1\u7406\u6a21\u578b\u53c2\u6570\u7684\u9879\u76ee\u3002<\/li>\n<\/ol>\n<p>\u9700\u8981\u6ce8\u610f\uff0cOpenAI \u517c\u5bb9\u53ea\u4ee3\u8868\u57fa\u7840\u8bf7\u6c42\u7ed3\u6784\u76f8\u8fd1\u3002\u7b2c\u4e09\u65b9\u7f51\u5173\u63d0\u4f9b\u7684\u4e13\u5c5e\u5b57\u6bb5\u3001\u7279\u6b8a\u5de5\u5177\u534f\u8bae\u6216\u81ea\u5b9a\u4e49\u54cd\u5e94\u5b57\u6bb5\uff0c\u672a\u5fc5\u4f1a\u88ab <code>ChatOpenAI<\/code> \u81ea\u52a8\u4fdd\u7559\u3002LangChain \u5b98\u65b9\u4e2d\u6587\u6587\u6863\u4e5f\u63d0\u9192\uff0c\u4ee3\u7406\u6216\u8def\u7531\u670d\u52a1\u7684\u63d0\u4f9b\u5546\u7279\u5b9a\u5b57\u6bb5\u53ef\u80fd\u65e0\u6cd5\u76f4\u63a5\u63d0\u53d6\u6216\u4fdd\u7559\u3002(<a href=\"https:\/\/docs.langchain.org.cn\/oss\/javascript\/langchain\/models\">docs.langchain.org.cn<\/a>)<\/p>\n<h2>\u5982\u4f55\u914d\u7f6e API Key \u4e0e Base URL<\/h2>\n<p>\u5148\u5b89\u88c5\u4f9d\u8d56\uff1a<\/p>\n<pre><code class=\"language-bash\">npm install @langchain\/openai\n<\/code><\/pre>\n<p>\u5728\u672c\u5730 <code>.env.local<\/code> \u4e2d\u4fdd\u5b58\u7f51\u5173\u914d\u7f6e\uff1a<\/p>\n<pre><code class=\"language-bash\">LLM_API_KEY=&quot;\u4f60\u7684\u7f51\u5173API\u5bc6\u94a5&quot;\nLLM_BASE_URL=&quot;https:\/\/api.example.com\/v1&quot;\nLLM_MODEL=&quot;\u4f60\u7684\u6a21\u578b\u540d\u79f0&quot;\n<\/code><\/pre>\n<p>\u4e0d\u8981\u628a API Key \u653e\u8fdb\u6d4f\u89c8\u5668\u4ee3\u7801\u3001React \u7ec4\u4ef6\u6216\u63d0\u4ea4\u5230 Git \u4ed3\u5e93\u3002Next.js \u9879\u76ee\u4e2d\uff0c\u672a\u4f7f\u7528 <code>NEXT_PUBLIC_<\/code> \u524d\u7f00\u7684\u53d8\u91cf\u9ed8\u8ba4\u66f4\u9002\u5408\u670d\u52a1\u7aef\u8bfb\u53d6\uff1b\u8c03\u7528\u6a21\u578b\u7684\u4ee3\u7801\u4e5f\u5e94\u653e\u5728 Route Handler\u3001Server Action \u6216\u5176\u4ed6\u670d\u52a1\u7aef\u8fd0\u884c\u4f4d\u7f6e\u3002<\/p>\n<p>\u4f7f\u7528 <code>ChatOpenAI<\/code> \u7684 TypeScript \u793a\u4f8b\uff1a<\/p>\n<pre><code class=\"language-ts\">import { ChatOpenAI } from &quot;@langchain\/openai&quot;;\n\nconst model = new ChatOpenAI({\n  apiKey: process.env.LLM_API_KEY,\n  model: process.env.LLM_MODEL,\n  temperature: 0,\n  timeout: 30_000,\n  maxRetries: 2,\n  configuration: {\n    baseURL: process.env.LLM_BASE_URL,\n  },\n});\n\nconst response = await model.invoke(&quot;\u7528\u4e00\u53e5\u8bdd\u89e3\u91ca\u4ec0\u4e48\u662f API \u7f51\u5173\u3002&quot;);\n\nconsole.log(response.content);\n<\/code><\/pre>\n<p>\u8fd9\u91cc\u6700\u5bb9\u6613\u5199\u9519\u7684\u662f\u53c2\u6570\u4f4d\u7f6e\uff1a\u5728 <code>ChatOpenAI<\/code> \u4e2d\uff0c\u81ea\u5b9a\u4e49\u5730\u5740\u901a\u5e38\u653e\u5728 <code>configuration.baseURL<\/code>\uff0c\u4e0d\u662f\u628a <code>baseURL<\/code> \u968f\u610f\u653e\u5230\u6a21\u578b\u9876\u5c42\u3002\u5177\u4f53\u53c2\u6570\u540d\u79f0\u5e94\u4ee5\u5f53\u524d\u5b89\u88c5\u7248\u672c\u7684\u53c2\u8003\u6587\u6863\u4e3a\u51c6\u3002<\/p>\n<h2>Next.js\u670d\u52a1\u7aef\u63a5\u5165\u7684\u63a8\u8350\u7ed3\u6784<\/h2>\n<p>Next.js \u5e94\u7528\u5efa\u8bae\u628a\u6a21\u578b\u521d\u59cb\u5316\u5c01\u88c5\u6210\u72ec\u7acb\u6a21\u5757\uff0c\u8ba9\u9875\u9762\u5c42\u53ea\u8d1f\u8d23\u4f20\u5165\u7528\u6237\u8bf7\u6c42\u3002\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u591a\u4e2a\u7ec4\u4ef6\u4e2d\u91cd\u590d\u8bfb\u53d6\u73af\u5883\u53d8\u91cf\uff0c\u4e5f\u4fbf\u4e8e\u672a\u6765\u66f4\u6362\u6a21\u578b\u6216\u7f51\u5173\u3002<\/p>\n<pre><code class=\"language-ts\">\/\/ lib\/llm.ts\nimport { ChatOpenAI } from &quot;@langchain\/openai&quot;;\n\nexport const llm = new ChatOpenAI({\n  apiKey: process.env.LLM_API_KEY,\n  model: process.env.LLM_MODEL,\n  temperature: 0.2,\n  timeout: 30_000,\n  maxRetries: 2,\n  configuration: {\n    baseURL: process.env.LLM_BASE_URL,\n  },\n});\n<\/code><\/pre>\n<pre><code class=\"language-ts\">\/\/ app\/api\/chat\/route.ts\nimport { llm } from &quot;@\/lib\/llm&quot;;\n\nexport async function POST(request: Request) {\n  const { message } = await request.json();\n\n  if (typeof message !== &quot;string&quot; || !message.trim()) {\n    return Response.json({ error: &quot;message \u4e0d\u80fd\u4e3a\u7a7a&quot; }, { status: 400 });\n  }\n\n  const result = await llm.invoke(message.trim());\n\n  return Response.json({\n    content: result.content,\n    usage: result.usage_metadata ?? null,\n  });\n}\n<\/code><\/pre>\n<p>\u8fd9\u79cd\u7ed3\u6784\u6709\u4e09\u4e2a\u5b9e\u9645\u597d\u5904\uff1a\u5bc6\u94a5\u53ea\u5728\u670d\u52a1\u7aef\u51fa\u73b0\u3001\u6a21\u578b\u53c2\u6570\u96c6\u4e2d\u7ba1\u7406\u3001\u9519\u8bef\u5904\u7406\u53ef\u4ee5\u5728 API \u5c42\u7edf\u4e00\u5b8c\u6210\u3002\u82e5\u5e94\u7528\u8fd8\u9700\u8981\u591a\u79df\u6237\u914d\u989d\u3001\u9879\u76ee\u5206\u8d26\u6216\u8c03\u7528\u9884\u7b97\uff0c\u53ef\u4ee5\u53c2\u8003<a href=\"https:\/\/ntokenx.com\/blog\/index.php\/2026\/09\/29\/multi-tenant-saas-quota-isolation\/\">\u591a\u79df\u6237 SaaS \u63a5\u5165\u5927\u6a21\u578b\u914d\u989d\u9694\u79bb\u65b9\u6848<\/a>\u8bbe\u8ba1\u9694\u79bb\u8fb9\u754c\u3002<\/p>\n<figure class=\"wp-block-image size-large\" style=\"margin:1.5em 0;\"><img decoding=\"async\" src=\"https:\/\/ntokenx.com\/blog\/wp-content\/uploads\/2026\/10\/backend-7913-2.jpg\" alt=\"Next.js\u670d\u52a1\u7aef\u8c03\u7528\u7edf\u4e00\u5927\u6a21\u578b API \u7684\u8bf7\u6c42\u6d41\u7a0b\" style=\"max-width:100%;height:auto;\"><\/figure>\n<h2>\u63a5\u5165\u540e\u5e94\u9a8c\u8bc1\u54ea\u4e9b\u517c\u5bb9\u6027<\/h2>\n<p>\u201c\u80fd\u8fd4\u56de\u4e00\u53e5\u8bdd\u201d\u53ea\u80fd\u8bc1\u660e\u57fa\u7840\u8c03\u7528\u6210\u529f\uff0c\u4e0d\u80fd\u8bc1\u660e\u4ee3\u7406\u7f51\u5173\u9002\u5408\u5b8c\u6574\u7684 LangChain \u5e94\u7528\u3002\u5efa\u8bae\u6309\u4ee5\u4e0b\u987a\u5e8f\u9a8c\u8bc1\uff1a<\/p>\n<ol>\n<li><strong>\u57fa\u7840\u5bf9\u8bdd<\/strong>\uff1a\u786e\u8ba4\u6587\u672c\u3001\u89d2\u8272\u6d88\u606f\u548c\u4e2d\u6587\u5185\u5bb9\u6b63\u5e38\u8fd4\u56de\u3002<\/li>\n<li><strong>\u6a21\u578b\u540d\u6620\u5c04<\/strong>\uff1a\u786e\u8ba4\u7f51\u5173\u8981\u6c42\u7684\u6a21\u578b\u540d\u4e0e\u63a7\u5236\u53f0\u6216\u6587\u6863\u5b8c\u5168\u4e00\u81f4\u3002<\/li>\n<li><strong>\u6d41\u5f0f\u8f93\u51fa<\/strong>\uff1a\u9a8c\u8bc1 <code>stream()<\/code> \u662f\u5426\u8fd4\u56de\u8fde\u7eed\u6587\u672c\u5757\uff0c\u800c\u4e0d\u662f\u4e00\u6b21\u6027\u54cd\u5e94\u3002<\/li>\n<li><strong>\u7ed3\u6784\u5316\u8f93\u51fa<\/strong>\uff1a\u9a8c\u8bc1 JSON Schema\u3001<code>withStructuredOutput()<\/code> \u6216\u5f3a\u5236 JSON \u662f\u5426\u53ef\u7528\u3002<\/li>\n<li><strong>\u5de5\u5177\u8c03\u7528<\/strong>\uff1a\u9a8c\u8bc1 <code>bindTools()<\/code> \u540e\u662f\u5426\u8fd4\u56de\u89c4\u8303\u7684 <code>tool_calls<\/code>\u3002<\/li>\n<li><strong>\u9519\u8bef\u683c\u5f0f<\/strong>\uff1a\u4e3b\u52a8\u6d4b\u8bd5\u65e0\u6548 Key\u3001\u9519\u8bef\u6a21\u578b\u3001\u8d85\u65f6\u548c\u9650\u6d41\u54cd\u5e94\u3002<\/li>\n<li><strong>\u7528\u91cf\u7edf\u8ba1<\/strong>\uff1a\u68c0\u67e5 <code>usage_metadata<\/code> \u662f\u5426\u5b58\u5728\uff0c\u4e0d\u80fd\u5047\u5b9a\u6240\u6709\u7f51\u5173\u90fd\u8fd4\u56de\u5b8c\u6574 Token \u6570\u636e\u3002<\/li>\n<\/ol>\n<p>\u5176\u4e2d\uff0c\u5de5\u5177\u8c03\u7528\u548c\u7ed3\u6784\u5316\u8f93\u51fa\u662f\u6700\u5bb9\u6613\u51fa\u73b0\u201c\u57fa\u7840\u804a\u5929\u6b63\u5e38\u3001Agent \u5374\u5931\u8d25\u201d\u7684\u90e8\u5206\u3002\u5982\u679c\u7f51\u5173\u53ea\u517c\u5bb9\u666e\u901a Chat Completions\uff0c\u800c\u6ca1\u6709\u5b8c\u6574\u5b9e\u73b0\u5de5\u5177\u8c03\u7528\u5b57\u6bb5\uff0cAgent \u53ef\u80fd\u65e0\u6cd5\u7ee7\u7eed\u6267\u884c\u5de5\u5177\u6b65\u9aa4\u3002<\/p>\n<p>\u672c\u6587\u7684\u72ec\u7acb\u6392\u9519\u6846\u67b6\u662f\uff1a<strong>\u5148\u534f\u8bae\uff0c\u518d\u9274\u6743\uff1b\u5148\u5355\u6a21\u578b\uff0c\u518d\u8def\u7531\uff1b\u5148\u540c\u6b65\uff0c\u518d\u6d41\u5f0f\uff1b\u5148\u666e\u901a\u5bf9\u8bdd\uff0c\u518d\u5de5\u5177\u8c03\u7528<\/strong>\u3002\u6bcf\u6b21\u53ea\u589e\u52a0\u4e00\u4e2a\u53d8\u91cf\uff0c\u6bd4\u540c\u65f6\u5207\u6362\u6a21\u578b\u3001\u6e29\u5ea6\u3001\u6d41\u5f0f\u548c\u5de5\u5177\u66f4\u5bb9\u6613\u5b9a\u4f4d\u95ee\u9898\u3002<\/p>\n<h2>\u5e38\u89c1\u62a5\u9519\u4e0e\u6392\u67e5\u65b9\u6cd5<\/h2>\n<h3>401 \u6216 403\uff1a\u5bc6\u94a5\u6ca1\u6709\u88ab\u6b63\u786e\u8bc6\u522b<\/h3>\n<p>\u68c0\u67e5\u73af\u5883\u53d8\u91cf\u662f\u5426\u5728\u670d\u52a1\u7aef\u751f\u6548\uff0c\u662f\u5426\u8bef\u7528\u4e86\u6d4f\u89c8\u5668\u7aef\u53d8\u91cf\uff0c\u662f\u5426\u590d\u5236\u4e86\u591a\u4f59\u7a7a\u683c\u3002\u8fd8\u8981\u786e\u8ba4\u7f51\u5173\u8981\u6c42\u7684\u662f <code>Authorization: Bearer<\/code> \u5f62\u5f0f\uff0c\u8fd8\u662f\u5176\u4ed6\u81ea\u5b9a\u4e49\u8bf7\u6c42\u5934\u3002<\/p>\n<h3>404\uff1aBase URL\u8def\u5f84\u4e0d\u5b8c\u6574<\/h3>\n<p>\u6709\u4e9b\u670d\u52a1\u8981\u6c42\u586b\u5199\u5230 <code>\/v1<\/code>\uff0c\u6709\u4e9b\u670d\u52a1\u8981\u6c42\u586b\u5199\u5230\u66f4\u5177\u4f53\u7684 API \u8def\u5f84\u3002\u4e0d\u8981\u6839\u636e\u5176\u4ed6 SDK \u7684\u5199\u6cd5\u731c\u6d4b\u5730\u5740\uff0c\u5e94\u4f7f\u7528\u7f51\u5173\u63d0\u4f9b\u7684\u5b8c\u6574\u7aef\u70b9\uff0c\u5e76\u68c0\u67e5 LangChain \u662f\u5426\u4f1a\u81ea\u52a8\u62fc\u63a5 <code>\/chat\/completions<\/code>\u3002<\/p>\n<h3>400\uff1a\u6a21\u578b\u540d\u6216\u8bf7\u6c42\u5b57\u6bb5\u4e0d\u517c\u5bb9<\/h3>\n<p>\u4f18\u5148\u68c0\u67e5 <code>model<\/code> \u5b57\u6bb5\u3001\u6d88\u606f\u683c\u5f0f\u3001\u5de5\u5177\u5b9a\u4e49\u548c\u54cd\u5e94\u683c\u5f0f\u53c2\u6570\u3002\u67d0\u4e9b\u6a21\u578b\u652f\u6301\u666e\u901a\u6587\u672c\uff0c\u5374\u4e0d\u652f\u6301\u5de5\u5177\u8c03\u7528\u6216\u4e25\u683c\u7ed3\u6784\u5316\u8f93\u51fa\u3002<\/p>\n<h3>429\uff1a\u89e6\u53d1\u901f\u7387\u6216\u989d\u5ea6\u9650\u5236<\/h3>\n<p>\u4e0d\u8981\u65e0\u9650\u91cd\u8bd5\u3002\u5e94\u4f7f\u7528\u5e26\u9000\u907f\u548c\u6296\u52a8\u7684\u6709\u9650\u91cd\u8bd5\uff0c\u5e76\u5728\u5e94\u7528\u4fa7\u8bbe\u7f6e\u5e76\u53d1\u4e0a\u9650\u3002\u6709\u5173 429 \u9519\u8bef\u7684\u9000\u907f\u3001\u6296\u52a8\u4e0e\u8def\u7531\u964d\u7ea7\uff0c\u53ef\u53c2\u8003<a href=\"https:\/\/ntokenx.com\/blog\/index.php\/2026\/10\/04\/llm-429-retry\/\">\u5927\u6a21\u578b\u63a5\u53e3\u8c03\u7528\u9519\u8bef\u7801429\u81ea\u52a8\u91cd\u8bd5\u7b56\u7565<\/a>\u3002<\/p>\n<h3>504\uff1a\u7f51\u5173\u6216\u4e0a\u6e38\u54cd\u5e94\u8d85\u65f6<\/h3>\n<p>\u5148\u533a\u5206\u4e09\u7c7b\u8017\u65f6\uff1a\u5e94\u7528\u81ea\u8eab\u8d85\u65f6\u3001\u4ee3\u7406\u7f51\u5173\u8d85\u65f6\u3001\u6a21\u578b\u4e0a\u6e38\u8d85\u65f6\u3002\u5c06\u8bf7\u6c42 ID\u3001\u6a21\u578b\u540d\u3001\u8017\u65f6\u548c\u9519\u8bef\u72b6\u6001\u5199\u5165\u65e5\u5fd7\uff0c\u4f46\u4e0d\u8981\u8bb0\u5f55\u5b8c\u6574\u7528\u6237 Prompt \u6216\u654f\u611f\u4e1a\u52a1\u6570\u636e\u3002\u53ef\u7ed3\u5408<a href=\"https:\/\/ntokenx.com\/blog\/index.php\/2026\/10\/22\/llm-504-timeout\/\">\u5927\u6a21\u578b\u63a5\u53e3\u8c03\u7528\u9519\u8bef\u7801504\u7f51\u5173\u8d85\u65f6\u5904\u7406<\/a>\u5efa\u7acb\u91cd\u8bd5\u548c\u964d\u7ea7\u7b56\u7565\u3002<\/p>\n<h2>\u7b2c\u4e09\u65b9\u4ee3\u7406\u7f51\u5173\u7684\u5b89\u5168\u68c0\u67e5\u6e05\u5355<\/h2>\n<p>\u63a5\u5165\u5b8c\u6210\u540e\uff0c\u81f3\u5c11\u786e\u8ba4\u4ee5\u4e0b\u4e8b\u9879\uff1a<\/p>\n<ul>\n<li>API Key \u53ea\u5b58\u5728\u670d\u52a1\u7aef\u73af\u5883\u53d8\u91cf\u6216\u5bc6\u94a5\u7ba1\u7406\u7cfb\u7edf\u4e2d\u3002<\/li>\n<li>\u65e5\u5fd7\u4e0d\u4f1a\u9ed8\u8ba4\u4fdd\u5b58\u5b8c\u6574 Prompt\u3001\u6587\u4ef6\u5185\u5bb9\u548c\u7528\u6237\u9690\u79c1\u3002<\/li>\n<li>\u4e0d\u540c\u9879\u76ee\u6216\u79df\u6237\u4f7f\u7528\u72ec\u7acb Key\u3001\u9884\u7b97\u6216\u6807\u7b7e\u3002<\/li>\n<li>\u6a21\u578b\u540d\u79f0\u3001\u8bf7\u6c42\u8def\u5f84\u548c\u54cd\u5e94\u683c\u5f0f\u6709\u56fa\u5b9a\u914d\u7f6e\uff0c\u4e0d\u63a5\u53d7\u7528\u6237\u4efb\u610f\u6ce8\u5165\u3002<\/li>\n<li>\u5bf9\u8d85\u65f6\u3001429\u30015xx \u8bbe\u7f6e\u6709\u9650\u91cd\u8bd5\uff0c\u907f\u514d\u6545\u969c\u65f6\u653e\u5927\u6d41\u91cf\u3002<\/li>\n<li>\u5bf9\u5de5\u5177\u8c03\u7528\u8bbe\u7f6e\u5141\u8bb8\u5217\u8868\uff0c\u4e0d\u8ba9\u6a21\u578b\u76f4\u63a5\u83b7\u5f97\u4e0d\u5fc5\u8981\u7684\u9ad8\u6743\u9650\u64cd\u4f5c\u3002<\/li>\n<li>\u5bf9\u4ee3\u7406\u670d\u52a1\u7684\u6388\u6743\u3001\u7a33\u5b9a\u6027\u548c\u6570\u636e\u5b89\u5168\u89c4\u5219\u8fdb\u884c\u4eba\u5de5\u6838\u9a8c\u3002<\/li>\n<\/ul>\n<p>\u5982\u679c\u9879\u76ee\u9700\u8981\u591a\u6a21\u578b\u5207\u6362\uff0c\u4e0d\u5efa\u8bae\u628a\u8def\u7531\u903b\u8f91\u6563\u843d\u5728\u4e1a\u52a1\u4ee3\u7801\u4e2d\u3002\u53ef\u4ee5\u7edf\u4e00\u5b9a\u4e49\u6a21\u578b\u914d\u7f6e\uff0c\u5e76\u8ba9\u4e1a\u52a1\u53ea\u8c03\u7528\u4e00\u4e2a <code>llm<\/code> \u63a5\u53e3\uff1b\u5f53\u67d0\u4e2a\u6a21\u578b\u4e0d\u53ef\u7528\u65f6\uff0c\u518d\u7531\u7f51\u5173\u6216\u5e94\u7528\u4fa7\u6309\u7167\u660e\u786e\u89c4\u5219\u8fdb\u884c\u964d\u7ea7\u3002<\/p>\n<figure class=\"wp-block-image size-large\" style=\"margin:1.5em 0;\"><img decoding=\"async\" src=\"https:\/\/ntokenx.com\/blog\/wp-content\/uploads\/2026\/10\/backend-7913-3.jpg\" alt=\"LangChain.js\u4ee3\u7406\u7f51\u5173\u5b89\u5168\u4e0e\u6392\u9519\u68c0\u67e5\u6e05\u5355\" style=\"max-width:100%;height:auto;\"><\/figure>\n<h2>\u5e38\u89c1\u95ee\u9898<\/h2>\n<h3>LangChain.js\u80fd\u5426\u63a5\u5165\u4efb\u610f\u7b2c\u4e09\u65b9\u6a21\u578b\u7f51\u5173\uff1f<\/h3>\n<p>\u4e0d\u80fd\u4fdd\u8bc1\u3002\u76ee\u6807\u670d\u52a1\u81f3\u5c11\u9700\u8981\u63d0\u4f9b\u4e0e LangChain \u6240\u4f7f\u7528\u534f\u8bae\u517c\u5bb9\u7684\u63a5\u53e3\uff1b\u5373\u4f7f\u666e\u901a\u804a\u5929\u53ef\u7528\uff0c\u5de5\u5177\u8c03\u7528\u3001\u7ed3\u6784\u5316\u8f93\u51fa\u548c\u6d41\u5f0f\u54cd\u5e94\u4ecd\u9700\u5355\u72ec\u9a8c\u8bc1\u3002<\/p>\n<h3>API Key\u5e94\u8be5\u653e\u5728\u54ea\u91cc\uff1f<\/h3>\n<p>\u653e\u5728\u670d\u52a1\u7aef\u73af\u5883\u53d8\u91cf\u3001\u90e8\u7f72\u5e73\u53f0\u5bc6\u94a5\u7ba1\u7406\u6216\u4e13\u7528 Secret \u7ba1\u7406\u7cfb\u7edf\u4e2d\u3002\u4e0d\u8981\u653e\u5728 <code>NEXT_PUBLIC_<\/code> \u53d8\u91cf\u3001\u524d\u7aef\u6e90\u7801\u3001\u6d4f\u89c8\u5668\u8bf7\u6c42\u53c2\u6570\u6216 Git \u63d0\u4ea4\u8bb0\u5f55\u91cc\u3002<\/p>\n<h3><code>baseURL<\/code>\u548c<code>baseUrl<\/code>\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h3>\n<p>\u5b83\u4eec\u53d6\u51b3\u4e8e\u5177\u4f53\u7c7b\u548c SDK\u3002<code>ChatOpenAI<\/code> \u5e38\u89c1\u5199\u6cd5\u662f <code>configuration.baseURL<\/code>\uff1b<code>initChatModel<\/code> \u7684\u914d\u7f6e\u793a\u4f8b\u4f7f\u7528 <code>baseUrl<\/code>\u3002\u5e94\u4ee5\u6240\u7528 LangChain.js 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