{"id":3166,"date":"2022-03-31T22:27:05","date_gmt":"2022-03-31T14:27:05","guid":{"rendered":"http:\/\/blog.odjbinail.cn\/?p=3166"},"modified":"2023-08-12T17:22:29","modified_gmt":"2023-08-12T09:22:29","slug":"koa2%e4%b8%ad%e9%97%b4%e4%bb%b6%e4%b8%8emongodb%e6%95%b0%e6%8d%ae%e5%ba%93","status":"publish","type":"post","link":"https:\/\/blog.odjbinail.cn\/?p=3166","title":{"rendered":"koa2\u4e2d\u95f4\u4ef6\u4e0eMongoDB\u6570\u636e\u5e93"},"content":{"rendered":"<h1>Koa2 \u6846\u67b6<\/h1>\n<h2>koa2 \u662f\u4ec0\u4e48<\/h2>\n<ul>\n<li>koa2 \u662f nodejs web server \u6846\u67b6<\/li>\n<li>\u4ec0\u4e48\u662f\u6846\u67b6 frame(\u7c7b\u6bd4 Vue)\n<ul>\n<li>\u5c01\u88c5\u539f\u751f\u4ee3\u7801\u7684 API<\/li>\n<li>\u89c4\u8303\u6d41\u7a0b\u548c\u683c\u5f0f<\/li>\n<li>\u8ba9\u5f00\u53d1\u4eba\u5458\u66f4\u52a0\u5173\u6ce8\u4e8e\u4e1a\u52a1\u4ee3\u7801,\u63d0\u9ad8\u5f00\u53d1\u6548\u7387<\/li>\n<\/ul>\n<\/li>\n<li>\u6846\u67b6 frame \u548c\u5e93 lib \u7684\u533a\u522b\n<ul>\n<li>\u6846\u67b6\u662f\u552f\u4e00\u7684\u5e93,,\u5c31\u53ef\u4ee5\u5171\u5b58<\/li>\n<li>\u6846\u67b6\u5173\u6ce8\u5168\u6d41\u7a0b,,\u5e93\u5173\u6ce8\u5355\u4e2a\u529f\u80fd<\/li>\n<li>\u7c7b\u6bd4 Vue \u548c lodash<\/li>\n<\/ul>\n<\/li>\n<li>\u6587\u6863 :  <a href=\"https:\/\/koa.bootcss.com\/\">https:\/\/koa.bootcss.com\/<\/a>\n<ul>\n<li>\u901a\u8fc7 async\/await \u8bed\u6cd5\u9ad8\u6548\u7f16\u5199 web server<\/li>\n<li>\u4e2d\u95f4\u4ef6\u673a\u5236,,\u80fd\u5408\u7406\u62c6\u5206\u4e1a\u52a1\u4ee3\u7801<\/li>\n<\/ul>\n<\/li>\n<li>koa2 \u5b89\u88c5\u548c\u4f7f\u7528\n<ul>\n<li>\u521d\u59cb\u5316 npm init<\/li>\n<li>\u5b89\u88c5 npm install koa --save<\/li>\n<li>\u57fa\u672c\u4f7f\u7528<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre class=\"prettyprint linenums\" ><code>const Koa=require(&#039;koa&#039;)\nconst app=new Koa()\n\/\/ ctx \u8bfb\u97f3 context \u4e0a\u4e0b\u6587\napp.use(async(ctx)=&gt;{\n  ctx.body=&#039;hello world&#039;\n})\napp.listen(3000)\/\/ web server \u76d1\u542c 3000 \u7aef\u53e3<\/code><\/pre>\n<h2>koa2 \u73af\u5883\u642d\u5efa-\u521b\u5efa\u9879\u76ee<\/h2>\n<ul>\n<li>\n<p>\u4f7f\u7528\u811a\u624b\u67b6 koa-generator \u521b\u5efa koa2 \u9879\u76ee<\/p>\n<\/li>\n<li>\n<p>\u4ecb\u7ecd\u9879\u76ee\u7684\u76ee\u5f55\u548c\u6587\u4ef6<\/p>\n<\/li>\n<li>\n<p>\u5728\u9879\u76ee\u4e2d\u65b0\u5efa\u4e00\u4e2a\u8def\u7531<\/p>\n<\/li>\n<li>\n<p>\u7c7b\u4f3c vue-cli<\/p>\n<\/li>\n<li>\n<p>npm install -g koa-generator<\/p>\n<\/li>\n<li>\n<p>koa2 --version<\/p>\n<\/li>\n<li>\n<p>koa2 test4<\/p>\n<\/li>\n<li>\n<p>cd test4<\/p>\n<\/li>\n<li>\n<p>npm install<\/p>\n<\/li>\n<\/ul>\n<h2>\u65b0\u5efa\u8def\u7531<\/h2>\n<ul>\n<li>routes -&gt; comments.js<\/li>\n<\/ul>\n<pre class=\"prettyprint linenums\" ><code>const router = require(&#039;koa-router&#039;)()\nrouter.prefix(&#039;\/api&#039;)\/\/\u524d\u7f00\n\/\/\u5b9a\u4e49\u8def\u7531:\u6a21\u62df\u83b7\u53d6\u7559\u8a00\u677f\u5217\u8868\nrouter.get(&#039;\/list&#039;, async (ctx) =&gt; {\n  ctx.body = &#039;api list&#039;\n})\n\/\/\u5b9a\u4e49\u8def\u7531:\u6a21\u62df\u521b\u5efa\u7559\u8a00\nrouter.post(&#039;\/create&#039;, async (ctx) =&gt; {\n  ctx.body = &#039;api create&#039;\n})\nmodule.exports = router;<\/code><\/pre>\n<ul>\n<li>app.js<\/li>\n<\/ul>\n<pre class=\"prettyprint linenums\" ><code> \/\/ \u5f15\u7528\u8def\u7531\nconst comments=require(&#039;.\/routes\/comments&#039;)\n\/\/ routes \u6ce8\u518c\u8def\u7531\napp.use(comments.routes(),comments.allowedMethods())\n\/\/ allowedMethods() \u5bf9\u4e8e 404 \u6216\u8005\u8fd4\u56de\u662f\u7a7a\u7684\u60c5\u51b5,\u7684\u4e00\u79cd\u8865\u5145<\/code><\/pre>\n<h2>koa2 \u5904\u7406 http \u8bf7\u6c42<\/h2>\n<ul>\n<li>\u5982\u4f55\u63a5\u6536\u548c\u8fd4\u56de\u6570\u636e\n<ul>\n<li>ctx \u5373 res \u548c req \u7684\u96c6\u5408<\/li>\n<li>querystring \u548c Request body<\/li>\n<li>Response body \u548c Content-type<\/li>\n<\/ul>\n<\/li>\n<li>routes -&gt; comments.js<\/li>\n<\/ul>\n<pre class=\"prettyprint linenums\" ><code>const router = require(&#039;koa-router&#039;)()\nrouter.prefix(&#039;\/api&#039;)\/\/\u524d\u7f00\n\/\/\u5b9a\u4e49\u8def\u7531:\u6a21\u62df\u83b7\u53d6\u7559\u8a00\u677f\u5217\u8868\nrouter.get(&#039;\/list&#039;, async (ctx) =&gt; {\n  const query = ctx.query \/\/req \u529f\u80fd\n  console.log(&#039;query&#039;, query)\n  \/\/ ctx.body = &#039;api list&#039; \/\/res \u529f\u80fd\n  ctx.body = {\n    errno: 0,\n    data: [\n      { content: &#039;\u7559\u8a00 1&#039;, user: &#039;\u5f20\u4e09&#039; },\n      { content: &#039;\u7559\u8a00 2&#039;, user: &#039;\u674e\u56db&#039; },\n      { content: &#039;\u7559\u8a00 3&#039;, user: &#039;\u65e0&#039; },\n    ]\n  }\n})\n\/\/\u5b9a\u4e49\u8def\u7531:\u6a21\u62df\u521b\u5efa\u7559\u8a00\nrouter.post(&#039;\/create&#039;, async (ctx) =&gt; {\n  const body = ctx.request.body \/\/request body\n  console.log(&#039;body&#039;, body)\n  ctx.body = {\n    errno: 0,\n    message: &#039;\u6210\u529f&#039;\n  }\n})\nmodule.exports = router;<\/code><\/pre>\n<h2>koa2 \u4e2d\u95f4\u4ef6<\/h2>\n<ul>\n<li>\u4ec0\u4e48\u662f\u4e2d\u95f4\u4ef6\n<ul>\n<li>\u4e00\u4e2a\u6d41\u7a0b\u4e0a,\u72ec\u7acb\u7684\u4e1a\u52a1\u6a21\u5757<\/li>\n<li>\u53ef\u6269\u5c55,\u53ef\u63d2\u62d4<\/li>\n<li>\u7c7b\u4f3c\u4e8e\u5de5\u5382\u7684\u6d41\u6c34\u7ebf<\/li>\n<\/ul>\n<\/li>\n<li>\u4e3a\u4ec0\u4e48\u4f7f\u7528\u4e2d\u95f4\u4ef6\n<ul>\n<li>\u62c6\u5206\u4e1a\u52a1\u6a21\u5757,\u4f7f\u4ee3\u7801\u6e05\u6670<\/li>\n<li>\u7edf\u4e00\u4f7f\u7528\u4e2d\u95f4\u4ef6,\u4f7f\u5f97\u5404\u4e1a\u52a1\u4ee3\u7801\u90fd\u89c4\u8303\u6807\u51c6<\/li>\n<li>\u6269\u5c55\u6027\u597d,\u6613\u6dfb\u52a0,\u6613\u5220\u9664<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u6a21\u62df\u767b\u5f55\u529f\u80fd<\/p>\n<ul>\n<li>\u767b\u5f55\u6821\u9a8c,\u53ef\u4f7f\u7528\u4e2d\u95f4\u4ef6\u6765\u5b9e\u73b0<\/li>\n<li>\u5047\u5982\u6240\u6709\u7684\u63a5\u53e3(\u8def\u7531)\u90fd\u9700\u8981\u767b\u5f55\u6821\u9a8c<\/li>\n<li>\u5047\u5982\u53ea\u6709\u4e00\u90e8\u5206\u63a5\u53e3,\u9700\u8981\u767b\u5f55\u6821\u9a8c<\/li>\n<\/ul>\n<pre class=\"prettyprint linenums\" ><code>app.js\n\/\/\u6a21\u62df\u767b\u5f55 (\u4e3a\u4e86\u4f7f\u7528\u4e2d\u95f4\u4ef6)\napp.use(async(ctx,next)=>{\nconst query=ctx.query\nif(query.user==='zhangsan'){\n\/\/\u6a21\u62df\u767b\u5f55\u6210\u529f\nawait next() \/\/\u6267\u884c\u4e0b\u4e00\u6b65\u4e2d\u95f4\u4ef6\n}else{\n\/\/\u6a21\u62df\u767b\u5f55\u5931\u8d25\nctx.body='\u8bf7\u767b\u5f55'\n}\n})<\/code><\/pre>\n<\/li>\n<\/ul>\n<p><img data-original=\"http:\/\/djblog.odjbinail.cn\/wp-content\/uploads\/2022\/03\/2022033023554153.png\"  alt=\"\" \/><\/p>\n<noscript><img decoding=\"async\" src=\"http:\/\/djblog.odjbinail.cn\/wp-content\/uploads\/2022\/03\/2022033023554153.png\" alt=\"\" \/><\/p><\/noscript>\n<h2>koa2 \u6d0b\u8471\u5708\u6a21\u578b-\u4ecb\u7ecd<\/h2>\n<ul>\n<li>\u4e2d\u95f4\u4ef6\u673a\u5236,\u662f koa2 \u7684\u7cbe\u9ad3<\/li>\n<li>\u6bcf\u4e2a\u4e2d\u95f4\u4ef6\u90fd\u662f async \u51fd\u6570<\/li>\n<li>\u4e2d\u95f4\u4ef6\u7684\u8fd0\u884c\u673a\u5236,\u5c31\u50cf\u6d0b\u8471\u5708<\/li>\n<\/ul>\n<h2>koa2 \u6d0b\u8471\u5708\u6a21\u578b-async \u8bed\u6cd5<\/h2>\n<pre class=\"prettyprint linenums\" ><code> \/\/\u6f14\u793a async await \u6267\u884c\u987a\u5e8f\n\/\/\u52a0\u8f7d\u4e00\u5f20\u56fe\u7247\nasync function getImg (url = '') {\n  await fetch(url) \/\/\u52a0\u8f7d\u56fe\u7247\n}\nasync function fn () {\n  const url = 'http:\/\/img3.sycdn.imooc.com\/5a9fc8070001a82402060220-140-140.jpg'\n  const start = Date.now() \/\/\u8bb0\u5f55\u5f53\u524d\u65f6\u95f4\n  await getImg(url) \/\/\u8c03\u52a8, \u52a0\u8f7d\u56fe\u7247\n  const ms = Date.now() - start \/\/\u8ba1\u7b97\u65f6\u95f4\u5dee\n  console.log(<code> \u52a0\u8f7d\u56fe\u7247\u82b1\u8d39\u4e86 ${ms} \u6beb\u79d2 <\/code>)\n}\n\/\/ fn()\nasync function A () {\n  console.log('A \u5f00\u59cb')\n  await fn()\n  console.log('A \u7ed3\u675f')\n}\nA()\n\/\/1.fn(B) 2.getImg(C) 3.fn(B)<\/code><\/pre>\n<h2>koa2 \u6d0b\u8471\u5708\u6a21\u578b-\u4ee3\u7801\u6f14\u793a<\/h2>\n<p><img data-original=\"http:\/\/djblog.odjbinail.cn\/wp-content\/uploads\/2022\/03\/2022033114431579.png\"  alt=\"\" \/><\/p>\n<noscript><img decoding=\"async\" src=\"http:\/\/djblog.odjbinail.cn\/wp-content\/uploads\/2022\/03\/2022033114431579.png\" alt=\"\" \/><\/p><\/noscript>\n<pre class=\"prettyprint linenums\" ><code>\/\/\u6f14\u793a koa2 \u4e2d\u95f4\u4ef6\u7684\u6d0b\u8471\u5708\u6a21\u578b\nconst Koa = require(&#039;koa&#039;)\nconst { set } = require(&#039;koa\/lib\/response&#039;)\nconst app = new Koa()\n\/\/logger ctx=req+res\napp.use(async (ctx, next) =&gt; {\n  await next() \/\/\u6267\u884c\u4e0b\u4e00\u4e2a\u4e2d\u95f4\u4ef6\n  const rt = ctx.response.get(&#039;X-Response-Time&#039;)\/\/ \u83b7\u53d6\u65f6\u95f4\u5dee\n  console.log(`${ctx.method} ${ctx.url} - ${rt}`)\n})\n\/\/x-response-time\napp.use(async (ctx, next) =&gt; {\n  const start = Date.now()\n  await next() \/\/\u6267\u884c\u4e0b\u4e00\u4e2a\u4e2d\u95f4\u4ef6\n  const ms = Date.now() - start \/\/\u8ba1\u7b97\u65f6\u95f4\u5dee,\u4f8b\u5982 80\n  ctx - set(&#039;X-Response-Time&#039;, `${ms}ms`) \/\/\u8bb0\u5f55\/\u8bbe\u7f6e \u65f6\u95f4\u5dee\n})\n\/\/response\napp.use(async (ctx, next) =&gt; {\n  ctx.body=&#039;Hello world&#039;\n})\napp.listen(3000)\nconsole.log(&#039;koa2 \u5df2\u7ecf\u5f00\u59cb\u76d1\u542c 3000 \u7aef\u53e3&#039;)<\/code><\/pre>\n<h2>\u6d0b\u8471\u5708\u6a21\u578b-\u5c0f\u7ed3<\/h2>\n<ul>\n<li>\u4e2d\u95f4\u4ef6\u673a\u5236: \u4e1a\u52a1\u6a21\u5757\u7684\u5212\u5206<\/li>\n<li>\u6d0b\u8471\u5708\u6a21\u578b:\u4e2d\u95f4\u4ef6\u7684\u6267\u884c\u673a\u5236<\/li>\n<li>\u4e24\u8005\u8981\u5206\u5f00\u6765\u770b,\u4e0d\u8981\u6df7\u5728\u4e00\u8d77<\/li>\n<\/ul>\n<h1>MongoDB \u6570\u636e\u5e93<\/h1>\n<ul>\n<li>\u5b58\u50a8\u6570\u636e,\u8981\u7528\u4e13\u4e1a\u7684\u6570\u636e\u5e93\u8f6f\u4ef6\n<ul>\n<li>\u6570\u636e\u5e93\u662f\u4e00\u4e2a\u72ec\u7acb\u7684\u7cfb\u7edf,\u548c\u670d\u52a1\u7aef\u8bed\u8a00\u65e0\u5173<\/li>\n<li>\u6570\u636e\u5e93\u6709\u5f88\u591a,\u6211\u4eec\u9009\u62e9 mongodb<\/li>\n<\/ul>\n<\/li>\n<li>\u6570\u636e\u5e93\u662f\u4e00\u4e2a\u975e\u5e38\u590d\u6742\u7684\u8f6f\u4ef6\n<ul>\n<li>\u63d0\u4f9b\u9ad8\u6548\u7684\u5b58\u50a8\u548c\u67e5\u8be2\u64cd\u4f5c(\u8fd8\u6709\u6761\u4ef6,\u6392\u5e8f\u7b49)<\/li>\n<li>\u80fd\u6ee1\u8db3\u5404\u4e2a\u4e1a\u52a1\u573a\u666f\u7684\u590d\u6742\u64cd\u4f5c<\/li>\n<\/ul>\n<\/li>\n<li>\u548c\u4efb\u4f55 web server \u7684\u8bed\u8a00,\u6846\u67b6,\u90fd\u53ef\u8fde\u63a5\n<ul>\n<li>\u5e38\u89c1\u7684\u6570\u636e\u5e93\u6709 mongodb [mysql sqlserver oracle]<\/li>\n<li>\u5206\u7c7b:\u975e\u5173\u7cfb\u578b\u6570\u636e\u5e93, [\u5173\u7cfb\u578b\u6570\u636e\u5e93]<\/li>\n<li>mongodb \u6613\u5b66\u6613\u7528,\u9002\u5408\u521d\u5b66\u8005\u5b66\u4e60<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.mongodb.com\/try\/download\/community\">https:\/\/www.mongodb.com\/try\/download\/community<\/a><\/p>\n<ul>\n<li>D:\\professional\\MongoDB\\bin&gt;mongod.exe --dbpath D:\\professional\\MongoDB\\data\\db<\/li>\n<li>&quot;port&quot;: 27017  \u9ed8\u8ba4\u7aef\u53e3<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Koa2 \u6846\u67b6 koa2 \u662f\u4ec0\u4e48 koa2 \u662f nodejs web server \u6846\u67b6 \u4ec0\u4e48\u662f\u6846\u67b6 fram [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-3166","post","type-post","status-publish","format-standard","hentry","category-web"],"_links":{"self":[{"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=\/wp\/v2\/posts\/3166","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3166"}],"version-history":[{"count":3,"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=\/wp\/v2\/posts\/3166\/revisions"}],"predecessor-version":[{"id":4334,"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=\/wp\/v2\/posts\/3166\/revisions\/4334"}],"wp:attachment":[{"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.odjbinail.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}