{"id":47795,"date":"2023-02-14T17:45:58","date_gmt":"2023-08-20T19:16:11","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90node-js%e3%80%91%e8%af%b7%e6%b1%82%e7%9a%84%e8%b5%84%e6%ba%90%e6%b2%a1%e6%9c%89%e8%ae%be%e7%bd%ae-access-control-allow-origin-%e5%a4%b4%e3%80%82explanation-%e3%80%90node-js%e3%80%91\/"},"modified":"2024-04-29T14:37:36","modified_gmt":"2024-04-29T06:37:36","slug":"%e3%80%90node-js%e3%80%91%e8%af%b7%e6%b1%82%e7%9a%84%e8%b5%84%e6%ba%90%e6%b2%a1%e6%9c%89%e8%ae%be%e7%bd%ae-access-control-allow-origin-%e5%a4%b4%e3%80%82explanation-%e3%80%90node-js%e3%80%91","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90node-js%e3%80%91%e8%af%b7%e6%b1%82%e7%9a%84%e8%b5%84%e6%ba%90%e6%b2%a1%e6%9c%89%e8%ae%be%e7%bd%ae-access-control-allow-origin-%e5%a4%b4%e3%80%82explanation-%e3%80%90node-js%e3%80%91\/","title":{"rendered":"\u3010Node.js\u3011\u8bf7\u6c42\u7684\u8d44\u6e90\u6ca1\u6709\u8bbe\u7f6e &#8216;Access-Control-Allow-Origin&#8217; \u5934\u3002Explanation: \u3010Node.js\u3011\u8bf7\u6c42\u7684\u8d44\u6e90\u6ca1\u6709\u8bbe\u7f6e &#8216;Access-Control-Allow-Origin&#8217; \u5934"},"content":{"rendered":"<p>\u4f60\u597d\uff0c\u6211\u662f\u62c9\u65af\u5361\u5c14\uff0c\u8f9b\u82e6\u4e86\u3002<\/p>\n<p>\u6211\u5728\u5de5\u4f5c\u4e2d\u8d1f\u8d23\u540e\u7aef\u548c\u524d\u7aef\uff0c\u5f53\u6211\u5c1d\u8bd5\u4f7f\u7528Graphql\u8fde\u63a5\u4e24\u8005\u7684\u5b9e\u73b0\u65f6\uff0c\u9047\u5230\u4e86\u4ee5\u4e0b\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code>Access to XMLHttpRequest at 'http:\/\/localhost:4000\/graphql' \r\nfrom origin 'http:\/\/localhost:3000' has been blocked by CORS policy: \r\nResponse to preflight request doesn't pass access control check: \r\nNo 'Access-Control-Allow-Origin' header is present on the requested resource.\r\n<\/code><\/pre>\n<p>\u55ef\uff0c\u770b\u8d77\u6765\u540e\u7aef\u6839\u636e\u524d\u7aef\u8bf7\u6c42\u9075\u5faa\u67d0\u79cd\u540d\u4e3aCORS\u7684\u89c4\u7ea6\uff0c\u53ef\u80fd\u662f\u5728\u6697\u793a\u300c\u563f\uff0c\u8bf7\u6c42\u5fc5\u987b\u9075\u5b88\u89c4\u5219\u5e76\u53d1\u9001\u8fc7\u6765?\u300d\uff0c\u8868\u73b0\u51fa\u4e86\u4e00\u79cd\u751f\u6c14\u7684\u6837\u5b50?\u3002<\/p>\n<h2>\u60c5\u51b5\u8bf4\u660e<\/h2>\n<h3>\u540e\u7aef<\/h3>\n<p>\u6211\u5011\u4f7f\u7528Node.js\u4e2d\u7684Express\u6846\u67b6\u4ee5\u53caTypeScript\u4f86\u5be6\u73fe\u5f8c\u7aef\u529f\u80fd\u3002<br \/>\n\u6211\u5011\u8207\u6211\u5011\u81ea\u5bb6\u7684AWS\u5efa\u7acb\u4e86\u9023\u63a5\uff0c\u53ef\u4ee5\u6839\u64da\u8acb\u6c42\u8fd4\u56de\u5716\u50cf\u548c\u6578\u64da\u7b49\u3002<br \/>\n\u6211\u5011\u7684\u5be6\u73fe\u4f7f\u7528GraphQL\u4f86\u63a5\u6536\u8acb\u6c42\uff0c\u4e26\u4e14\u5728\u672c\u5730\u74b0\u5883\u4e2d\u4e5f\u78ba\u8a8d\u4e86\u6b63\u78ba\u8fd4\u56de\u9810\u671f\u97ff\u61c9\u7684\u529f\u80fd\u3002<\/p>\n<p>\u5728\u8fd9\u4e2a\u65f6\u5019\uff0c\u7aef\u53e3\u53f7\u4e3a4000\uff0c\u4e5f\u5c31\u662f\u8bf4localhost:4000\/graphql\u662f\u540e\u7aef\u7684URI\u3002<\/p>\n<h3>\u524d\u7aef\u3002<\/h3>\n<p>\u524d\u7aef\u4f7f\u7528React\u548cTypeScript\u6765\u5b9e\u73b0\uff0c\u9996\u6b21\u52a0\u8f7d\u65f6\u4f7f\u7528GraphQL\u5411\u540e\u7aef\u53d1\u51fa\u8bf7\u6c42\uff0c\u5e76\u663e\u793a\u63a5\u6536\u5230\u7684\u54cd\u5e94\u5185\u5bb9\uff0c\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u7b80\u5355\u7684\u5b9e\u73b0\u3002<\/p>\n<p>\u5728\u8fd9\u4e2a\u65f6\u5019\uff0c\u7aef\u53e3\u662f3000\uff0c\u4e5f\u5c31\u662f\u8bf4localhost:3000\/\u662f\u524d\u7aef\u7684URI\u3002<\/p>\n<h2>\u9519\u8bef\u7684\u539f\u56e0<\/h2>\n<p>\u9519\u8bef\u4fe1\u606f\u5df2\u7ecf\u5199\u5728\u4e86\u4e0a\u9762\uff0c\u8981\u8bf4\u7684\u5c31\u662f\u56e0\u4e3a\u4f7f\u7528\u4e86CORS\u7981\u6b62\u7684\u8bf7\u6c42\u65b9\u5f0f\uff0c\u6240\u4ee5\u624d\u4f1a\u51fa\u73b0\u9519\u8bef\u3002<\/p>\n<p>\u6682\u4e14\u4e0d\u8c08CORS\u7684\u7ec6\u8282\uff0c\u7b80\u5355\u603b\u7ed3\u4e00\u4e0b\uff0c\u4e0d\u5141\u8bb8\u63a5\u53d7\u6765\u81ea\u4e0d\u540c\u57df\u540d\u7684\u8bf7\u6c42\uff0c\u8fd9\u662f\u901a\u8fc7\u6d4f\u89c8\u5668\u89c4\u5b9a\u7684\u3002<\/p>\n<p>\u786e\u5b9e<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u306flocalhost:3000\/<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306flocalhost:4000\/<\/ul>\n<p>\u7531\u4e8e\u4e0e\u4e0d\u540c\u7684\u57df\u540d\u4e0d\u4e00\u6837\uff0c\u6240\u4ee5\u9047\u5230\u4e86CORS\u7684\u95ee\u9898\u3002<\/p>\n<p>\u55ef\uff0c\u5982\u679c\u4ed4\u7ec6\u8003\u8651\u7684\u8bdd\uff0c\u53ef\u4ee5\u4ece\u4e0d\u540c\u7684\u57df\u540d\u8bbf\u95ee\u53ef\u80fd\u5728\u5b89\u5168\u65b9\u9762\u4e0d\u592a\u7406\u60f3\u3002<br \/>\n\u8c22\u8c22\uff0cCORS?<\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p>\u5f00\u5934\u7684\u8bdd\u8bf4\u5f97\u6709\u70b9\u957f\u4e86\u3002<br \/>\n\u603b\u7ed3\u8d77\u6765\uff0c\u53ea\u9700\u8981\u5b89\u88c5\u4e00\u4e2a\u540d\u4e3a&#8221;cors&#8221;\u7684node\u6a21\u5757\u5c31\u80fd\u89e3\u51b3\u95ee\u9898\u4e86\u3002<\/p>\n<pre class=\"post-pre\"><code>npm install --save cors\r\n<\/code><\/pre>\n<p>\u6b64\u5916\uff0c\u5982\u679c\u60a8\u6b63\u5728\u4f7f\u7528TypeScript\u3002<\/p>\n<pre class=\"post-pre\"><code>npm install --save-dev @types\/cors\r\n<\/code><\/pre>\n<p>\u8ba9\u6211\u4eec\u5148\u5b89\u88c5\u597d\u3002<\/p>\n<p>\u5b8c\u6210\u540e\uff0c\u6211\u4eec\u5c06\u5f00\u59cb\u8fdb\u884c\u540e\u7aef\u5b9e\u73b0\u3002<br \/>\n\u5b9e\u73b0\u53ea\u9700\u6dfb\u52a0app.use(cors ())\u5373\u53ef\u3002<\/p>\n<pre class=\"post-pre\"><code>const app = express()\r\n\r\n++ app.use(cors())\r\n\r\napp.use('\/graphql', graphqlHTTP({\r\n  schema: schema,\r\n  rootValue: root,\r\n  graphiql: true\r\n}))\r\n\r\n\r\napp.listen(4000, () =&gt; {\r\n  console.log('Start Express GraphQL Server. Listen to localhost:4000\/graphql')\r\n});\r\n<\/code><\/pre>\n<p>\u6211\u8ba4\u4e3a\u901a\u8fc7\u4ee5\u4e0a\u65b9\u6cd5\u53ef\u4ee5\u89e3\u51b3\u9519\u8bef\u3002<\/p>\n<p>\u53ea\u8981\u4ece\u7279\u5b9a\u7684\u57df\u540d\u63a5\u6536\u8bf7\u6c42\uff0c\u5c31\u4f1a\u642d\u5efa\u4e00\u4e2a\u53ef\u4ee5\u4ece\u4efb\u4f55\u57df\u540d\u8bbf\u95ee\u7684\u7cfb\u7edf\u3002\uff08\u867d\u7136\u662f\u672c\u5730\u4e3b\u673a\uff0c\u6240\u4ee5\u5e94\u8be5\u6ca1\u6709\u592a\u5927\u7684\u5f71\u54cd\uff0c\u4f46\u4e3a\u4e86\u4ee5\u540e\u8003\u8651\uff0c\uff09\u6211\u4eec\u4f1a\u5b9e\u73b0\u4ec5\u63a5\u53d7\u6765\u81ea\u7279\u5b9a\u57df\u540d\u7684\u8bf7\u6c42\u3002<\/p>\n<pre class=\"post-pre\"><code>const app = express()\r\n\r\n++ const corsOptions = {\r\n     origin: 'http:\/\/localhost:3000',\r\n     optionsSuccessStatus: 200 \r\n   }\r\n\r\n++ app.use(cors(corsOptions))\r\n\r\n-- app.use(cors())\r\n\r\napp.use('\/graphql', graphqlHTTP({\r\n  schema: schema,\r\n  rootValue: root,\r\n  graphiql: true\r\n}))\r\n\r\n\r\napp.listen(4000, () =&gt; {\r\n  console.log('Start Express GraphQL Server. Listen to localhost:4000\/graphql')\r\n});\r\n<\/code><\/pre>\n<p>\u521b\u5efa\u4e00\u4e2a\u540d\u4e3acorsOptions\u7684\u53d8\u91cf\uff0c\u8be5\u53d8\u91cf\u5305\u542b\u5141\u8bb8\u7684\u57df\u548c\u6210\u529f\u540e\u7684\u72b6\u6001\u7801\u3002\u5c06\u8be5\u53d8\u91cf\u4f5c\u4e3acors()\u7684\u53c2\u6570\u4f20\u9012\u5373\u53ef?\u3002<\/p>\n<h2>\u989d\u5916\u5185\u5bb9\uff1a\u672a\u80fd\u89e3\u51b3\u7684\u5904\u7406\u65b9\u6cd5<\/h2>\n<p>\u5728\u7814\u7a76CORS\u76f8\u5173\u5185\u5bb9\u65f6\uff0c\u53d1\u73b0\u53ef\u4ee5\u4e0d\u5fc5\u7279\u610f\u5b89\u88c5CORS\u6a21\u5757\uff0c<\/p>\n<pre class=\"post-pre\"><code>const app = express()\r\n\r\napp.use('\/graphql', graphqlHTTP({\r\n  schema: schema,\r\n  rootValue: root,\r\n  graphiql: true\r\n}))\r\n\r\napp.use(function(req, res, next) {\r\n  res.header('Access-Control-Allow-Origin', 'http:\/\/localhost:3000');\r\n  res.header('Access-Control-Allow-Headers', 'X-Requested-With, X-HTTP-Method-Override, Content-Type, Accept');\r\n  res.header('Access-Control-Allow-Methods', 'POST, GET, PUT, DELETE, OPTIONS');\r\n  res.header('Access-Control-Max-Age', '86400');\r\n  next();\r\n});\r\n\r\napp.listen(4000, () =&gt; {\r\n  console.log('Start Express GraphQL Server. Listen to localhost:4000\/graphql')\r\n});\r\n<\/code><\/pre>\n<p>\u6211\u5728\u8bb8\u591a\u5730\u65b9\u770b\u5230\u4e86\u7c7b\u4f3c\u7684\u5efa\u8bae\uff0c\u8bf4\u53ea\u8981\u8986\u76d6\u6807\u5934\u5c31\u53ef\u4ee5\u4e86\uff0c\u4f46\u5728\u6211\u7684\u73af\u5883\u4e2d\u5e76\u6ca1\u6709\u6210\u529f\u3002\u6211\u4f1a\u7ee7\u7eed\u7814\u7a76\uff0c\u7b49\u6211\u5f04\u6e05\u695a\u540e\u518d\u8865\u5145\u8bf4\u660e\u3002?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f60\u597d\uff0c\u6211\u662f\u62c9\u65af\u5361\u5c14\uff0c\u8f9b\u82e6\u4e86\u3002 \u6211\u5728\u5de5\u4f5c\u4e2d\u8d1f\u8d23\u540e\u7aef\u548c\u524d\u7aef\uff0c\u5f53\u6211\u5c1d\u8bd5\u4f7f\u7528Graphql\u8fde\u63a5\u4e24\u8005\u7684\u5b9e\u73b0\u65f6\uff0c\u9047\u5230\u4e86\u4ee5\u4e0b [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-47795","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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