{"id":2376,"date":"2020-02-01T18:35:17","date_gmt":"2020-02-01T10:35:17","guid":{"rendered":"http:\/\/www.yuguoxy.com\/geekhome\/?p=2376"},"modified":"2026-08-18T12:35:23","modified_gmt":"2026-08-18T04:35:23","slug":"koa2-%e4%bb%8e%e5%85%a5%e9%97%a8%e5%88%b0%e8%bf%9b%e9%98%b6%e4%b9%8b%e8%b7%af-%ef%bc%88%e4%ba%8c%ef%bc%89","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=2376","title":{"rendered":"koa2 \u4ece\u5165\u95e8\u5230\u8fdb\u9636(\u4e8c)-\u8def\u7531"},"content":{"rendered":"
\n

\u4e0a\u4e00\u7bc7\u5df2\u7ecf\u80fd\u5728\u672c\u5730\u542f\u52a8\u4e00\u4e2a\u6700\u7b80\u5355\u7684 Koa \u5e94\u7528\u3002\u8fd9\u4e00\u7bc7\u628a\u91cd\u70b9\u653e\u5230 \u8def\u7531<\/strong>\uff1a\u600e\u4e48\u6309 URL \u8fd4\u56de\u4e0d\u540c\u5185\u5bb9\u3001\u600e\u4e48\u63a5 GET \u4f20\u503c\uff0c\u4ee5\u53ca\u600e\u4e48\u5199 \u52a8\u6001\u8def\u7531<\/strong>\u3002<\/p>\n

\u548c Express \u4e0d\u540c\uff0cKoa \u5185\u6838\u4e0d\u81ea\u5e26\u8def\u7531\uff0c\u9700\u8981\u5355\u72ec\u5b89\u88c5 koa-router<\/code>\u3002GET \u53c2\u6570\u65e2\u53ef\u4ee5\u4ece ctx.query<\/code> \u62ff\u5bf9\u8c61\uff0c\u4e5f\u53ef\u4ee5\u4ece\u8def\u5f84\u53c2\u6570 ctx.params<\/code> \u62ff\u3002<\/p>\n

\u4e00\u3001Koa \u8def\u7531\u662f\u4ec0\u4e48<\/h2>\n

\u8def\u7531\u7531\u4e00\u4e2a URI\uff08\u8def\u5f84\uff09\u548c\u4e00\u79cd HTTP \u65b9\u6cd5\uff08GET\u3001POST \u7b49\uff09\u7ec4\u6210\uff0c\u51b3\u5b9a\u5e94\u7528\u5982\u4f55\u54cd\u5e94\u5ba2\u6237\u7aef\u5bf9\u67d0\u4e2a\u8282\u70b9\u7684\u8bbf\u95ee\u3002\u901a\u4fd7\u8bb2\uff1a\u6839\u636e\u4e0d\u540c URL\uff0c\u52a0\u8f7d\u4e0d\u540c\u9875\u9762\u3001\u5b9e\u73b0\u4e0d\u540c\u529f\u80fd<\/strong>\u3002<\/p>\n

Express \u91cc\u5f15\u5165\u6846\u67b6\u5c31\u80fd\u914d\u8def\u7531\uff1bKoa \u5fc5\u987b\u5148\u88c5\u8def\u7531\u6a21\u5757\uff1a<\/p>\n

npm install koa-router --save<\/code><\/pre>\n
\u4e8c\u3001\u914d\u7f6e\u57fa\u7840\u8def\u7531<\/h2>\n
\u63a5\u7740\u4e0a\u4e00\u8282\u7684\u9879\u76ee\u76ee\u5f55\u6539 app.js<\/code>\u3002\u7528 router.get()<\/code> \u5206\u522b\u5904\u7406 \/<\/code> \u548c \/news<\/code>\uff0c\u518d\u7528 app.use(router.routes())<\/code> \u542f\u52a8\u8def\u7531\u3002<\/p>\n
\/\/\u5f15\u5165 koa\u6a21\u5757\nvar Koa = require('koa');\nvar Router = require('koa-router');\n\n\/\/\u5b9e\u4f8b\u5316\nvar app = new Koa();\nvar router = new Router();\n\n\/\/\u914d\u7f6e\u8def\u7531\nrouter.get('\/', async (ctx) => {\n    \/\/ ctx  \u4e0a\u4e0b\u6587 context \uff0c\u5305\u542b\u4e86request \u548cresponse\u7b49\u4fe1\u606f\n    \/\/ \u8fd4\u56de\u6570\u636e    \u76f8\u5f53\u4e8e\uff1a\u539f\u751f\u91cc\u9762\u7684res.writeHead()  res.end()\n    ctx.body = '\u9996\u9875';\n});\nrouter.get('\/news', async (ctx) => {\n    ctx.body = \"\u65b0\u95fb\u9875\u9762\";\n});\n\n\/\/\u542f\u52a8\u8def\u7531\napp.use(router.routes());\napp.use(router.allowedMethods());\n\/**\n router.allowedMethods()\u4f5c\u7528\uff1a \u8fd9\u662f\u5b98\u65b9\u6587\u6863\u7684\u63a8\u8350\u7528\u6cd5,\u6211\u4eec\u53ef\u4ee5\n \u770b\u5230 router.allowedMethods()\u7528\u5728\u4e86\u8def\u7531\u5339\u914d router.routes()\u4e4b\u540e,\u6240\u4ee5\u5728\u5f53\u6240\u6709\n \u8def\u7531\u4e2d\u95f4\u4ef6\u6700\u540e\u8c03\u7528.\u6b64\u65f6\u6839\u636e ctx.status \u8bbe\u7f6e response \u54cd\u5e94\u5934\n \u53ef\u4ee5\u914d\u7f6e\u4e5f\u53ef\u4ee5\u4e0d\u914d\u7f6e,\u5efa\u8bae\u914d\u7f6e\uff0c\n *\/\n\napp.listen(3000);<\/code><\/pre>\n
ctx<\/code> \u662f\u4e0a\u4e0b\u6587\uff0c\u91cc\u9762\u6709 request \u548c response\u3002\u7ed9 ctx.body<\/code> \u8d4b\u503c\uff0c\u76f8\u5f53\u4e8e\u539f\u751f\u91cc\u7684 res.writeHead()<\/code> + res.end()<\/code>\u3002\u672c\u5730\u542f\u52a8\u540e\u8bbf\u95ee \/<\/code> \u662f\u9996\u9875\uff0c\u8bbf\u95ee \/news<\/code> \u4f1a\u770b\u5230\u300c\u65b0\u95fb\u9875\u9762\u300d\u3002<\/p>\n
router.allowedMethods()<\/code> \u5b98\u65b9\u5efa\u8bae\u5199\u5728 router.routes()<\/code> \u4e4b\u540e\uff1a\u6240\u6709\u8def\u7531\u4e2d\u95f4\u4ef6\u8dd1\u5b8c\uff0c\u518d\u6839\u636e ctx.status<\/code> \u8865\u54cd\u5e94\u5934\u3002\u53ef\u4ee5\u4e0d\u914d\uff0c\u5efa\u8bae\u914d\u4e0a\u3002<\/p>\n
\u4e09\u3001GET \u4f20\u503c\uff1aquery \u4e0e querystring<\/h2>\n
\u5b9e\u9645\u5730\u5740\u7ecf\u5e38\u957f\u8fd9\u6837\uff1ahttp:\/\/localhost:3000\/news?id=1&title=aaa<\/code>\u3002\u95ee\u53f7\u540e\u9762\u7684\u503c\uff0cKoa2 \u901a\u8fc7 request \u63a5\u6536\uff0c\u65b9\u6cd5\u6709\u4e24\u79cd\uff1aquery<\/code> \u8fd4\u56de\u683c\u5f0f\u5316\u597d\u7684\u5bf9\u8c61\uff0cquerystring<\/code> \u8fd4\u56de\u8bf7\u6c42\u5b57\u7b26\u4e32\u3002\u63a8\u8350\u7528\u5f97\u6700\u591a\u7684 ctx.query<\/code>\u3002<\/p>\n
\/\/\u5f15\u5165 koa\u6a21\u5757\nvar Koa = require('koa');\nvar Router = require('koa-router');\n\n\/\/\u5b9e\u4f8b\u5316\nvar app = new Koa();\nvar router = new Router();\n\n\/\/\u914d\u7f6e\u8def\u7531\nrouter.get('\/', async (ctx) => {\n\/\/ ctx \u4e0a\u4e0b\u6587 context \uff0c\u5305\u542b\u4e86request \u548cresponse\u7b49\u4fe1\u606f\n\/\/ \u8fd4\u56de\u6570\u636e \u76f8\u5f53\u4e8e\uff1a\u539f\u751f\u91cc\u9762\u7684res.writeHead() res.end()\nctx.body = '\u9996\u9875';\n});\nrouter.get('\/news', async (ctx) => {\n\/**\n\u5728 koa2 \u4e2d GET \u4f20\u503c\u901a\u8fc7 request \u63a5\u6536\uff0c\u4f46\u662f\u63a5\u6536\u7684\u65b9\u6cd5\u6709\u4e24\u79cd\uff1aquery \u548c querystring\u3002\nquery\uff1a\u8fd4\u56de\u7684\u662f\u683c\u5f0f\u5316\u597d\u7684\u53c2\u6570\u5bf9\u8c61\u3002\nquerystring\uff1a\u8fd4\u56de\u7684\u662f\u8bf7\u6c42\u5b57\u7b26\u4e32\u3002\n*\/\n\n\/\/\u4ecectx\u4e2d\u8bfb\u53d6get\u4f20\u503c\nconsole.log(ctx.url); \/\/ \/news?id=1&title=aaa\nconsole.log(ctx.query); \/\/ { id: '1', title: 'aaa' } \u83b7\u53d6\u7684\u662f\u5bf9\u8c61 \u7528\u7684\u6700\u591a\u7684\u65b9\u5f0f ******\u63a8\u8350\nconsole.log(ctx.querystring); \/\/ id=1&title=aaa \u83b7\u53d6\u7684\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\n\n\/\/ctx\u91cc\u9762\u7684request\u91cc\u9762\u83b7\u53d6get\u4f20\u503c\nconsole.log(ctx.request.url); \/\/ \/news?id=1&title=aaa\nconsole.log(ctx.request.query); \/\/ { id: '1', title: 'aaa' } \u5bf9\u8c61\nconsole.log(ctx.request.querystring); \/\/ id=1&title=aaa\nctx.body = \"\u65b0\u95fb\u9875\u9762\";\n});\n\n\/\/\u542f\u52a8\u8def\u7531\napp.use(router.routes());\napp.use(router.allowedMethods());\n\/**\nrouter.allowedMethods()\u4f5c\u7528\uff1a \u8fd9\u662f\u5b98\u65b9\u6587\u6863\u7684\u63a8\u8350\u7528\u6cd5,\u6211\u4eec\u53ef\u4ee5\n\u770b\u5230 router.allowedMethods()\u7528\u5728\u4e86\u8def\u7531\u5339\u914d router.routes()\u4e4b\u540e,\u6240\u4ee5\u5728\u5f53\u6240\u6709\n\u8def\u7531\u4e2d\u95f4\u4ef6\u6700\u540e\u8c03\u7528.\u6b64\u65f6\u6839\u636e ctx.status \u8bbe\u7f6e response \u54cd\u5e94\u5934\n\u53ef\u4ee5\u914d\u7f6e\u4e5f\u53ef\u4ee5\u4e0d\u914d\u7f6e,\u5efa\u8bae\u914d\u7f6e\uff0c\n*\/\n\napp.listen(3000);<\/code><\/pre>\n
ctx<\/code> \u4e0a\u80fd\u76f4\u63a5\u8bfb url \/ query \/ querystring<\/code>\uff0cctx.request<\/code> \u91cc\u540c\u6837\u6709\u8fd9\u4e09\u9879\uff0c\u8f93\u51fa\u4e00\u81f4\u3002\u6d4f\u89c8\u5668\u6253\u5f00\u4e0a\u9762\u7684\u5730\u5740\u540e\uff0c\u7f16\u8f91\u5668\u63a7\u5236\u53f0\u5c31\u80fd\u6253\u51fa\u5bf9\u8c61\u548c\u5b57\u7b26\u4e32\u3002<\/p>\n
\u56db\u3001\u52a8\u6001\u8def\u7531\u4e0e ctx.params<\/h2>\n
\u8fd8\u6709\u4e00\u79cd\u5730\u5740\u4e0d\u662f\u67e5\u8be2\u4e32\uff0c\u800c\u662f\u8def\u5f84\u672c\u8eab\u5e26\u53c2\u6570\uff0c\u4f8b\u5982 http:\/\/localhost:3000\/news\/123<\/code>\u3002\u5982\u679c\u5199\u6210\u6b7b\u8def\u5f84 \/news\/123<\/code>\uff0c\u540e\u9762\u6362\u6210\u522b\u7684\u6570\u5b57\u5c31\u5f97\u518d\u5199\u4e00\u6761\u8def\u7531\uff0c\u663e\u7136\u4e0d\u53ef\u53d6\u3002\u8fd9\u65f6\u7528\u52a8\u6001\u8def\u7531 \/news\/:id<\/code>\uff0c\u518d\u7528 ctx.params<\/code> \u53d6\u503c\u3002<\/p>\n
\/\/\u5f15\u5165 koa\u6a21\u5757\nvar Koa = require('koa');\nvar Router = require('koa-router');\n\n\/\/\u5b9e\u4f8b\u5316\nvar app = new Koa();\nvar router = new Router();\n\n\/\/\u914d\u7f6e\u8def\u7531\nrouter.get('\/', async (ctx) => {\n    \/\/ ctx  \u4e0a\u4e0b\u6587 context \uff0c\u5305\u542b\u4e86request \u548cresponse\u7b49\u4fe1\u606f\n    \/\/ \u8fd4\u56de\u6570\u636e    \u76f8\u5f53\u4e8e\uff1a\u539f\u751f\u91cc\u9762\u7684res.writeHead()  res.end()\n    ctx.body = '\u9996\u9875';\n});\nrouter.get('\/news\/:id', async (ctx) => {\n    \/**\n     \u83b7\u53d6\u52a8\u6001\u8def\u7531\u4f20\u53c2\n     *\/\n\n    \/\/\u4ecectx\u4e2d\u8bfb\u53d6get\u4f20\u503c\n    console.log(ctx.url);   \/\/ \/news\/123\n    console.log(ctx.params);  \/\/ { id: '123' }\n    ctx.body = \"\u65b0\u95fb\u9875\u9762\";\n});\n\n\/\/\u542f\u52a8\u8def\u7531\napp.use(router.routes());\napp.use(router.allowedMethods());\n\/**\n router.allowedMethods()\u4f5c\u7528\uff1a \u8fd9\u662f\u5b98\u65b9\u6587\u6863\u7684\u63a8\u8350\u7528\u6cd5,\u6211\u4eec\u53ef\u4ee5\n \u770b\u5230 router.allowedMethods()\u7528\u5728\u4e86\u8def\u7531\u5339\u914d router.routes()\u4e4b\u540e,\u6240\u4ee5\u5728\u5f53\u6240\u6709\n \u8def\u7531\u4e2d\u95f4\u4ef6\u6700\u540e\u8c03\u7528.\u6b64\u65f6\u6839\u636e ctx.status \u8bbe\u7f6e response \u54cd\u5e94\u5934\n \u53ef\u4ee5\u914d\u7f6e\u4e5f\u53ef\u4ee5\u4e0d\u914d\u7f6e,\u5efa\u8bae\u914d\u7f6e\uff0c\n *\/\n\napp.listen(3000);<\/code><\/pre>\n
\u628a\u539f\u6765\u7684 router.get('\/news')<\/code> \u6539\u6210 router.get('\/news\/:id')<\/code> \u540e\uff0c\u8bbf\u95ee \/news\/123<\/code>\uff0c\u63a7\u5236\u53f0\u4f1a\u6253\u51fa { id: '123' }<\/code>\u3002<\/p>\n\n\n\n\n\n\n\n\n
\u573a\u666f<\/th>\n\u793a\u4f8b URL<\/th>\n\u600e\u4e48\u53d6<\/th>\n\u5f97\u5230\u4ec0\u4e48<\/th>\n<\/tr>\n<\/thead>\n
\u56fa\u5b9a\u8def\u5f84<\/td>\n\/news<\/td>\nrouter.get(‘\/news’)<\/td>\n\u5339\u914d\u6574\u6bb5\u8def\u5f84<\/td>\n<\/tr>\n
\u67e5\u8be2\u4e32\u5bf9\u8c61<\/td>\n\/news?id=1&title=aaa<\/td>\nctx.query\uff08\u63a8\u8350\uff09<\/td>\n{ id: ‘1’, title: ‘aaa’ }<\/td>\n<\/tr>\n
\u67e5\u8be2\u4e32\u539f\u6587<\/td>\n\u540c\u4e0a<\/td>\nctx.querystring<\/td>\nid=1&title=aaa<\/td>\n<\/tr>\n
\u52a8\u6001\u8def\u5f84<\/td>\n\/news\/123<\/td>\nctx.params<\/td>\n{ id: ‘123’ }<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u5f15\u81ea\uff1ahttps:\/\/www.cnblogs.com\/weijiutao\/p\/10688892.html<\/a><\/p>\n
\n
\u4e00\u53e5\u8bdd\u603b\u7ed3\uff1aKoa \u8def\u7531\u9760 koa-router\uff1b\u95ee\u53f7\u53c2\u6570\u7528 ctx.query\uff0c\u8def\u5f84\u53c2\u6570\u7528 \/news\/:id \u52a0 ctx.params\u3002<\/strong><\/p>\n<\/blockquote>\n<\/section>\n","protected":false},"excerpt":{"rendered":"
\u4e0a\u4e00\u7bc7\u5df2\u7ecf\u80fd\u5728\u672c\u5730\u542f\u52a8\u4e00\u4e2a\u6700\u7b80\u5355\u7684 Koa \u5e94\u7528\u3002\u8fd9\u4e00\u7bc7\u628a\u91cd\u70b9\u653e\u5230 \u8def\u7531\uff1a\u600e\u4e48\u6309 URL \u8fd4\u56de\u4e0d\u540c\u5185\u5bb9\u3001\u600e\u4e48\u63a5 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[107,105],"tags":[208],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2376"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2376"}],"version-history":[{"count":3,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2376\/revisions"}],"predecessor-version":[{"id":3265,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2376\/revisions\/3265"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}