{"id":2372,"date":"2020-02-01T18:30:14","date_gmt":"2020-02-01T10:30:14","guid":{"rendered":"http:\/\/www.yuguoxy.com\/geekhome\/?p=2372"},"modified":"2020-02-01T18:51:37","modified_gmt":"2020-02-01T10:51:37","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%b8%80%ef%bc%89","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=2372","title":{"rendered":"koa2 \u4ece\u5165\u95e8\u5230\u8fdb\u9636(\u4e00)-\u5165\u95e8"},"content":{"rendered":"

\u9996\u5148\u6211\u4eec\u5148\u6765\u4e86\u89e3\u4e00\u4e0b Koa \u662f\u4ec0\u4e48\uff0chttps:\/\/koa.bootcss.com\/<\/a>\uff0c\u8fd9\u662f Koa \u7684\u5b98\u65b9\u7f51\u7ad9\uff0c\u6620\u5165\u773c\u5e18\u7684\u7b2c\u4e00\u53e5\u5c31\u662f\u00a0Koa — \u57fa\u4e8e Node.js \u5e73\u53f0\u7684\u4e0b\u4e00\u4ee3 web \u5f00\u53d1\u6846\u67b6\u3002<\/strong><\/p>\n

\u5728\u5b66\u4e60 Koa \u4e4b\u524d\u6211\u4eec\u5e94\u5bf9 Node.js \u6709\u4e00\u5b9a\u7684\u57fa\u7840\uff0c\u6211\u4eec\u90fd\u77e5\u9053\uff1a<\/p>\n

\n
\n
\n

Node.js \u662f\u4e00\u4e2a\u5f02\u6b65\u7684\u4e16\u754c\uff0c\u5b98\u65b9 API \u652f\u6301\u7684\u90fd\u662f callback \u5f62\u5f0f\u7684\u5f02\u6b65\u7f16\u7a0b\u6a21\u578b\uff0c\u8fd9\u4f1a\u5e26\u6765\u8bb8\u591a\u95ee\u9898\uff0c\u4f8b\u5982:1\u3001callback \u5d4c\u5957\u95ee\u9898 2\u3001\u5f02\u6b65\u51fd\u6570\u4e2d\u53ef\u80fd\u540c\u6b65\u8c03\u7528 callback \u8fd4\u56de \u6570\u636e\uff0c\u5e26\u6765\u4e0d\u4e00\u81f4\u6027\u3002\u4e3a\u4e86\u89e3\u51b3\u4ee5\u4e0a\u95ee\u9898 Koa \u51fa\u73b0\u4e86\u3002<\/p>\n

\n
\n
\n

koa \u662f\u7531 Express \u539f\u73ed\u4eba\u9a6c\u6253\u9020\u7684\uff0c\u81f4\u529b\u4e8e\u6210\u4e3a\u4e00\u4e2a\u66f4\u5c0f\u3001\u66f4\u5bcc\u6709\u8868\u73b0\u529b\u3001\u66f4\u5065\u58ee\u7684 Web \u6846\u67b6\u3002 \u4f7f\u7528 koa \u7f16\u5199 web \u5e94\u7528\uff0c\u53ef\u4ee5\u514d\u9664\u91cd\u590d\u7e41\u7410\u7684\u56de\u8c03\u51fd\u6570\u5d4c\u5957\uff0c \u5e76\u6781\u5927\u5730\u63d0 \u5347\u9519\u8bef\u5904\u7406\u7684\u6548\u7387\u3002koa \u4e0d\u5728\u5185\u6838\u65b9\u6cd5\u4e2d\u7ed1\u5b9a\u4efb\u4f55\u4e2d\u95f4\u4ef6\uff0c \u5b83\u4ec5\u4ec5\u63d0\u4f9b\u4e86\u4e00\u4e2a\u8f7b\u91cf\u4f18\u96c5\u7684 \u51fd\u6570\u5e93\uff0c\u4f7f\u5f97\u7f16\u5199 Web \u5e94\u7528\u53d8\u5f97\u5f97\u5fc3\u5e94\u624b\u3002\u5f00\u53d1\u601d\u8def\u548c express \u5dee\u4e0d\u591a\uff0c\u6700\u5927\u7684\u7279\u70b9\u5c31\u662f \u53ef\u4ee5\u907f\u514d\u5f02\u6b65\u5d4c\u5957\u3002<\/p>\n

Koa2 \u7684\u5b89\u88c5\u4e0e\u4f7f\u7528\u5bf9 Node.js \u7684\u7248\u672c\u4e5f\u662f\u6709\u8981\u6c42\u7684\uff0cNode.js \u662f\u6709\u8981\u6c42\u7684\uff0c\u5b83\u8981\u6c42 Node.js \u7248\u672c\u9ad8\u4e8e V7.6\u3002\u56e0\u4e3a node.js 7.6 \u7248\u672c \u5f00\u59cb\u5b8c\u5168\u652f\u6301 async\/await\uff0c\u6240\u4ee5\u624d\u80fd\u5b8c\u5168\u652f\u6301 Koa2\u3002<\/p>\n

\u5b89\u88c5 Koa<\/p>\n

\n
\n
\n

\u5b89\u88c5 Koa \u6846\u67b6\u548c\u6211\u4eec\u4ee5\u524d\u5b89\u88c5\u5176\u4ed6\u6a21\u5757\u662f\u4e00\u6837\u7684\u3002<\/p>\n

\n
npm install --save koa \/ cnpm install --save koa<\/pre>\n<\/div>\n
\n
\n
\n
\n
–save \u53c2\u6570\uff0c\u8868\u793a\u81ea\u52a8\u4fee\u6539 package.json \u6587\u4ef6\uff0c\u81ea\u52a8\u6dfb\u52a0\u4f9d\u8d56\u9879\u3002<\/p>\n
\u63a5\u4e0b\u6765\u6211\u4eec\u5c31\u5b9e\u6218\u6765\u770b\u4e00\u4e0b\u5982\u4f55\u5b89\u88c5\u4f7f\u7528\u4e00\u4e2a\u6700\u7b80\u5355\u7684 Koa \u5e94\u7528\u5e76\u5728\u672c\u5730\u8fd0\u884c\u3002<\/p>\n
\u9996\u5148\u6211\u4eec\u5148\u521b\u5efa\u4e00\u4e2a\u6211\u4eec\u8981\u5f00\u53d1\u7684\u9879\u76ee\u7684\u76ee\u5f55\u4e2d\uff0c\u7136\u540e\u8fd0\u884c\u00a0\u00a0npm init<\/span>\u00a0\uff0c\u4e3a\u6211\u4eec\u7684\u9879\u76ee\u8d77\u4e2a\u540d\u5b57\uff0c\u7136\u540e\u4e00\u8def\u56de\u8f66\uff0c\u8fd9\u6837\u5c31\u4f1a\u5728\u6211\u4eec\u7684\u9879\u76ee\u76ee\u5f55\u4e2d\u521b\u5efa\u4e00\u4e2a\u6700\u57fa\u672c\u7684 package.json \u7684\u6587\u4ef6\uff0c\u63a5\u4e0b\u6765\u5b89\u88c5\u6211\u4eec\u8981\u4f7f\u7528\u7684 koa \u6a21\u5757\u00a0\u00a0npm install koa –save<\/span>\u00a0\uff0c\u8fd9\u6837\u6211\u4eec\u5c31\u5f15\u5165\u4e86 koa \u6728\u5757\uff0c\u63a5\u4e0b\u6765\u5c31\u548c Express \u6a21\u5757\u662f\u4e00\u6837\u7684\u64cd\u4f5c\u6d41\u7a0b\uff0c\u6211\u4eec\u5728\u9879\u76ee\u76ee\u5f55\u4e2d\u521b\u5efa\u4e00\u4e2a app.js\uff0c\u5728 app.js \u4e2d\u5199\u6211\u4eec\u7684\u7a0b\u5e8f\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n
\u6700\u7ec8\u6211\u4eec\u521b\u5efa\u7684\u9879\u76ee\u76ee\u5f55\u5982\u4e0b\uff1a<\/p>\n
\"1345718-20190411113808689-644683350\"<\/a><\/p>\n
\u6211\u4eec\u5728 app.js \u4e2d\u5199\u4e00\u4e2a\u7b80\u5355\u7684\u6848\u4f8b\uff1a<\/p>\n
[java]
\nvar koa = require("koa");<\/p>\n
var app = new koa();<\/p>\n
\/\/ Express \u5199\u6cd5
\n\/\/ app.use(function (req, res) {
\n\/\/     res.send("hello word")
\n\/\/ });<\/p>\n
app.use(async (ctx) => {
\n    ctx.body = "hello word"
\n});<\/p>\n
app.listen(3000);
\n[\/java]<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u5f15\u5165 koa \u6a21\u5757\uff0c\u7136\u540e\u521b\u5efa\u4e00\u4e2a koa \u5b9e\u4f8b\uff0c\u63a5\u4e0b\u6765\u548c Express \u4e00\u6837\u7684\u662f\u521b\u5efa\u4e00\u4e2a\u4e2d\u95f4\u4ef7\uff0c\u7136\u540e\u5199\u4e00\u4e2a\u5f02\u6b65\u51fd\u6570\u6765\u5411\u524d\u7aef\u9875\u9762\u8fd4\u56de\u6570\u636e\u3002Express \u7684\u5199\u6cd5\u5728\u8fd9\u91cc\u5c31\u4e0d\u505a\u8fc7\u591a\u89e3\u91ca\u4e86\uff0c\u6211\u4eec\u6765\u770b\u4e00\u4e0b koa \u5199\u6cd5\uff0c\u6211\u4eec\u901a\u8fc7 async ()=>{} \u7684\u5f02\u6b65\u65b9\u6cd5\u4e0e\u524d\u7aef\u5efa\u7acb\u8fde\u63a5\uff0c\u91cc\u9762\u4f1a\u6709\u4e00\u4e2a cxt \u7684\u53c2\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 ctx.body \u7684\u5f62\u5f0f\u5411\u524d\u7aef\u53d1\u9001\u6570\u636e\u3002<\/p>\n
app.listen(3000); \u6765\u76d1\u542c 3000 \u7aef\u53e3\uff0c\u6211\u4eec\u5c06\u7a0b\u5e8f\u8fd0\u884c\u8d77\u6765\uff0c\u5728\u524d\u7aef\u8f93\u5165 localhost:3000<\/p>\n
\"1345718-20190411120120718-1910115550\"<\/p>\n
\u8fd9\u6837\u6211\u4eec\u5c31\u5b9e\u73b0\u4e86\u4e00\u4e2a\u6700\u57fa\u672c\u7684 koa \u7684\u5c0f\u6848\u4f8b\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u4f1a\u6df1\u5165\u4ecb\u7ecd koa \u6846\u67b6\u3002<\/p>\n
 <\/p>\n
\u539f\u6587\u94fe\u63a5:https:\/\/www.cnblogs.com\/weijiutao\/p\/10688805.html<\/a><\/p>\n
\u53c2\u8003:https:\/\/www.itying.com\/koa\/article-index-id-78.html<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u9996\u5148\u6211\u4eec\u5148\u6765\u4e86\u89e3\u4e00\u4e0b Koa \u662f\u4ec0\u4e48\uff0chttps:\/\/koa.bootcss.com\/\uff0c\u8fd9\u662f Koa \u7684\u5b98\u65b9\u7f51 […]<\/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":[],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2372"}],"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=2372"}],"version-history":[{"count":5,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2372\/revisions"}],"predecessor-version":[{"id":2394,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2372\/revisions\/2394"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}