{"id":110748,"date":"2026-09-29T11:01:04","date_gmt":"2026-09-29T03:01:04","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/110748.html"},"modified":"2026-09-29T11:01:04","modified_gmt":"2026-09-29T03:01:04","slug":"learnyounode-%e5%ae%9e%e6%88%98%ef%bc%9a%e5%9f%ba%e4%ba%8e-node-js-http-%e6%a8%a1%e5%9d%97%e4%b8%8e-fs-createreadstream-%e6%9e%84%e5%bb%ba-http-%e6%96%87%e4%bb%b6%e6%b5%81%e6%9c%8d%e5%8a%a1","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/110748.html","title":{"rendered":"learnyounode \u5b9e\u6218\uff1a\u57fa\u4e8e Node.js `http` \u6a21\u5757\u4e0e `fs.createReadStream()` \u6784\u5efa HTTP \u6587\u4ef6\u6d41\u670d\u52a1\u5668"},"content":{"rendered":"<ul class=\"gcb-tag-list\">\n<li><span class=\"gcb-tag\">\u6559\u7a0b<\/span><\/li>\n<li><span class=\"gcb-tag\">CLI<\/span><\/li>\n<\/ul>\n<h3 class=\"gcb-project-title\">\u3010\u514d\u8d39\u4e0b\u8f7d\u94fe\u63a5\u3011learnyounode<\/h3>\n<p class=\"gcb-project-desc\">Learn You The Node.js For Much Win! An intro to Node.js via a set of self-guided workshops.<\/p>\n<p>    <span class=\"gcb-project-addr-label\">\u9879\u76ee\u5730\u5740&#xff1a;<\/span><br \/>\n    <span class=\"gcb-project-addr-link\">https:\/\/gitcode.com\/gh_mirrors\/le\/learnyounode<\/span> <\/p>\n<p>  <span class=\"gcb-project-btn\"> <span class=\"gcb-project-btn-main\">\u70b9\u51fb\u67e5\u770b<\/span> <span class=\"gcb-project-btn-sub\">\u514d\u8d39\u4e0b\u8f7d<\/span> <\/span> <\/p>\n<h3>\u5bfc\u8bfb<\/h3>\n<p>\u672c\u6587\u57fa\u4e8e learnyounode \u7ec3\u4e60\u9879\u76ee\u4e2d\u7684 HTTP \u6587\u4ef6\u670d\u52a1\u5668&#xff08;http_file_server&#xff09;\u9898\u76ee\u5c55\u5f00\u3002\u8be5\u7ec3\u4e60\u8981\u6c42\u5f00\u53d1\u8005\u4f7f\u7528 Node.js \u6838\u5fc3\u6a21\u5757 http \u521b\u5efa\u4e00\u4e2a HTTP \u670d\u52a1\u5668&#xff0c;\u8be5\u670d\u52a1\u5668\u4e3a\u6bcf\u4e00\u6b21\u8bf7\u6c42\u8fd4\u56de\u540c\u4e00\u4e2a\u6587\u672c\u6587\u4ef6&#xff0c;\u5e76\u4e14\u5f3a\u5236\u8981\u6c42\u4f7f\u7528 fs.createReadStream() \u4ee5\u6d41&#xff08;stream&#xff09;\u7684\u65b9\u5f0f\u628a\u6587\u4ef6\u5185\u5bb9\u76f4\u63a5&#034;\u7ba1\u9053&#034;\u7ed9 HTTP \u54cd\u5e94&#xff0c;\u800c\u4e0d\u662f\u4e00\u6b21\u6027\u8bfb\u5b8c\u6574\u4e2a\u6587\u4ef6\u518d\u8fd4\u56de\u3002\u8bfb\u5b8c\u672c\u6587\u540e&#xff0c;\u4f60\u5c06\u638c\u63e1 http.createServer() \u7684\u56de\u8c03\u7b7e\u540d\u3001request\/response \u7684\u6d41\u5c5e\u6027\u3001src.pipe(dst) \u6d41\u5f0f\u4f20\u8f93\u7684\u6838\u5fc3\u7528\u6cd5&#xff0c;\u4ee5\u53ca learnyounode \u5728\u9a8c\u8bc1\u672c\u9898\u65f6\u5bf9 fs.createReadStream() \u7684\u6e90\u7801\u7ea7\u68c0\u6d4b\u673a\u5236&#xff0c;\u4ece\u800c\u5199\u51fa\u65e2\u901a\u8fc7\u9a8c\u8bc1\u53c8\u5177\u5907\u5b9e\u6218\u4ef7\u503c\u7684\u6587\u4ef6\u670d\u52a1\u5668\u3002<\/p>\n<h3>\u4e00\u3001\u9898\u76ee\u8981\u6c42&#xff1a;\u9762\u5411\u6240\u6709\u8bf7\u6c42\u8fd4\u56de\u540c\u4e00\u4e2a\u6587\u4ef6<\/h3>\n<p>\u9898\u76ee\u539f\u6587&#xff08;\u89c1 exercises\/http_file_server\/problem.es.md&#xff09;\u6838\u5fc3\u8981\u6c42\u5982\u4e0b&#xff1a;<\/p>\n<ul>\n<li>\u7f16\u5199\u4e00\u4e2a HTTP \u670d\u52a1\u5668&#xff08;\u800c\u975e TCP \u670d\u52a1\u5668&#xff09;&#xff0c;\u4e3a\u6536\u5230\u7684\u6bcf\u4e00\u6b21\u8bf7\u6c42\u8fd4\u56de\u540c\u4e00\u4e2a\u6587\u672c\u6587\u4ef6&#xff1b;<\/li>\n<li>\u670d\u52a1\u5668\u76d1\u542c\u7684\u7aef\u53e3\u53f7\u6765\u81ea\u547d\u4ee4\u884c\u7b2c\u4e00\u4e2a\u53c2\u6570&#xff08;process.argv[2]&#xff09;&#xff1b;<\/li>\n<li>\u8981\u8fd4\u56de\u7684\u6587\u4ef6\u8def\u5f84\u6765\u81ea\u547d\u4ee4\u884c\u7b2c\u4e8c\u4e2a\u53c2\u6570&#xff08;process.argv[3]&#xff09;&#xff1b;<\/li>\n<li>\u5fc5\u987b\u4f7f\u7528 fs.createReadStream() \u4ee5\u6d41\u7684\u65b9\u5f0f\u628a\u6587\u4ef6\u5185\u5bb9\u5199\u5165\u54cd\u5e94\u4f53\u3002<\/li>\n<\/ul>\n<p>\u4e0e\u65e9\u671f\u7ec3\u4e60&#xff08;\u5982 my_first_io \u7684\u540c\u6b65\u8bfb\u6587\u4ef6\u3001my_first_async_io \u7684\u5f02\u6b65\u8bfb\u6587\u4ef6&#xff09;\u4e0d\u540c&#xff0c;\u672c\u9898\u523b\u610f\u5f3a\u8c03&#034;\u6d41\u5f0f\u4f20\u8f93&#034;&#xff1a;\u6587\u4ef6\u53ef\u80fd\u5f88\u5927&#xff0c;\u6b63\u786e\u505a\u6cd5\u662f\u628a\u6587\u4ef6\u6d41\u4e0e\u54cd\u5e94\u6d41\u76f4\u63a5\u8fde\u63a5&#xff0c;\u800c\u4e0d\u662f\u628a\u6574\u4e2a\u6587\u4ef6\u8bfb\u8fdb\u5185\u5b58\u518d\u4e00\u6b21\u6027 end() \u51fa\u53bb\u3002<\/p>\n<p>\u5bf9\u5e94\u7684\u82f1\u6587\u539f\u7248\u89c1 exercises\/http_file_server\/problem.md&#xff0c;\u5176\u4e2d\u8fd8\u8865\u5145\u4e86\u4e00\u53e5\u5173\u952e\u4fe1\u606f&#xff1a;\u7a0b\u5e8f\u6587\u4ef6\u540d\u5e94\u4e3a http-file-server.js&#xff0c;\u9a8c\u8bc1\u547d\u4ee4\u4e3a&#xff1a;<\/p>\n<p>$ {appname} verify http-file-server.js<\/p>\n<p>\u5728 learnyounode \u4e2d {appname} \u5373 learnyounode&#xff0c;\u56e0\u6b64\u5b9e\u9645\u64cd\u4f5c\u65f6\u8fd0\u884c&#xff1a;<\/p>\n<p>$ learnyounode verify http-file-server.js<\/p>\n<h3>\u4e8c\u3001\u6838\u5fc3 API&#xff1a;http.createServer() \u4e0e\u56de\u8c03\u7b7e\u540d<\/h3>\n<p>\u7531\u4e8e\u8981\u521b\u5efa\u7684\u662f HTTP \u670d\u52a1\u5668\u800c\u4e0d\u662f\u901a\u7528 TCP \u670d\u52a1\u5668&#xff0c;\u5e94\u4f7f\u7528 Node \u6838\u5fc3\u6a21\u5757 http\u3002\u5b83\u548c net \u6a21\u5757\u7c7b\u4f3c&#xff0c;\u540c\u6837\u63d0\u4f9b http.createServer() \u65b9\u6cd5&#xff0c;\u533a\u522b\u5728\u4e8e\u5b83\u6240\u521b\u5efa\u7684\u670d\u52a1\u5668\u4f7f\u7528 HTTP \u534f\u8bae\u901a\u4fe1\u3002<\/p>\n<p>http.createServer() \u63a5\u6536\u4e00\u4e2a\u56de\u8c03\u51fd\u6570&#xff0c;\u8be5\u56de\u8c03\u5728\u670d\u52a1\u5668\u6bcf\u4e00\u6b21\u6536\u5230\u8fde\u63a5\u65f6\u88ab\u8c03\u7528&#xff0c;\u7b7e\u540d\u5982\u4e0b&#xff1a;<\/p>\n<p>function callback (request, response) { \/* &#8230; *\/ }<\/p>\n<p>\u4e24\u4e2a\u53c2\u6570\u5206\u522b\u662f\u4ee3\u8868\u672c\u6b21 HTTP \u8bf7\u6c42\u4e0e\u5bf9\u5e94\u54cd\u5e94\u7684\u5bf9\u8c61&#xff1a;<\/p>\n<ul>\n<li>request&#xff1a;\u7528\u4e8e\u83b7\u53d6\u8bf7\u6c42\u76f8\u5173\u4fe1\u606f&#xff0c;\u4f8b\u5982\u8bf7\u6c42\u5934&#xff08;header&#xff09;\u548c\u67e5\u8be2\u5b57\u7b26\u4e32&#xff08;query-string&#xff09;&#xff1b;<\/li>\n<li>response&#xff1a;\u7528\u4e8e\u5411\u5ba2\u6237\u7aef\u8fd4\u56de\u6570\u636e&#xff0c;\u5305\u62ec\u54cd\u5e94\u5934\u90e8&#xff08;headers&#xff09;\u548c\u54cd\u5e94\u4f53&#xff08;body&#xff09;\u3002<\/li>\n<\/ul>\n<p>\u5173\u952e\u70b9&#xff1a;request \u548c response \u90fd\u662f Node \u6d41&#xff08;stream&#xff09;&#xff01;\u8fd9\u610f\u5473\u7740\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u6d41\u5f0f\u62bd\u8c61\u6765\u6536\u53d1\u6570\u636e\u2014\u2014\u8fd9\u6b63\u662f\u672c\u9898\u80fd\u7528 pipe \u8fde\u63a5\u6587\u4ef6\u6d41\u4e0e\u54cd\u5e94\u6d41\u7684\u7406\u8bba\u57fa\u7840\u3002<\/p>\n<p>http.createServer() \u8fd4\u56de server \u5b9e\u4f8b&#xff0c;\u9700\u8981\u8c03\u7528 server.listen(portNumber) \u5f00\u59cb\u76d1\u542c\u6307\u5b9a\u7aef\u53e3\u3002\u9898\u76ee\u7ed9\u51fa\u7684\u5178\u578b\u6a21\u677f&#xff1a;<\/p>\n<p>const http &#061; require(&#039;http&#039;)<br \/>\nconst server &#061; http.createServer(function (req, res) {<br \/>\n  \/\/ \u5904\u7406\u8bf7\u6c42\u7684\u903b\u8f91&#8230;<br \/>\n})<br \/>\nserver.listen(8000)<\/p>\n<p>http \u6a21\u5757\u7684\u5b8c\u6574\u6587\u6863\u5b58\u653e\u5728\u672c\u4ed3\u5e93 docs-nodejs\/http.html&#xff0c;\u53ef\u5bf9\u7167\u67e5\u9605 createServer\u3001response \u6d41\u5f0f\u63a5\u53e3\u7b49\u7ec6\u8282\u3002<\/p>\n<h3>\u4e09\u3001\u6d41\u5f0f\u6587\u4ef6\u4f20\u8f93&#xff1a;fs.createReadStream() \u4e0e src.pipe(dst)<\/h3>\n<p>fs \u6838\u5fc3\u6a21\u5757\u63d0\u4f9b\u9762\u5411\u6587\u4ef6\u7684\u6d41\u5f0f API\u3002\u9898\u76ee\u8981\u6c42\u4f7f\u7528 fs.createReadStream() \u4e3a\u547d\u4ee4\u884c\u53c2\u6570\u6307\u5b9a\u7684\u6587\u4ef6\u521b\u5efa\u8bfb\u53d6\u6d41&#xff0c;\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a Readable \u6d41\u5bf9\u8c61&#xff1b;\u968f\u540e\u501f\u52a9\u7ba1\u9053\u8bed\u6cd5 src.pipe(dst) \u628a\u6570\u636e\u4ece\u6e90\u6d41 src \u4f20\u8f93\u5230\u76ee\u6807\u6d41 dst\u3002<\/p>\n<p>\u5728\u672c\u573a\u666f\u4e2d&#xff0c;\u6e90\u6d41\u662f\u6587\u4ef6\u7cfb\u7edf\u6d41&#xff0c;\u76ee\u6807\u6d41\u662f HTTP \u54cd\u5e94\u6d41&#xff0c;\u4e00\u53e5\u4ee3\u7801\u5373\u53ef\u5b8c\u6210\u8fde\u63a5&#xff1a;<\/p>\n<p>fs.createReadStream(process.argv[3]).pipe(res)<\/p>\n<p>\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f&#xff1a;\u6587\u4ef6\u6570\u636e\u4ee5\u5c0f\u5757&#xff08;chunk&#xff09;\u65b9\u5f0f\u8fb9\u8bfb\u8fb9\u53d1&#xff0c;\u5185\u5b58\u5360\u7528\u4e0e\u6587\u4ef6\u5927\u5c0f\u65e0\u5173&#xff0c;\u6d4f\u89c8\u5668\u7aef\u4e5f\u80fd\u5c3d\u65e9\u6536\u5230\u6570\u636e\u3002<\/p>\n<h3>\u56db\u3001\u5b8c\u6574\u53ef\u8fd0\u884c\u7684\u6807\u51c6\u7b54\u6848<\/h3>\n<p>\u4ed3\u5e93\u4e2d exercises\/http_file_server\/solution\/solution.js \u7ed9\u51fa\u4e86\u5b98\u65b9\u6807\u51c6\u89e3\u6cd5&#xff0c;\u5168\u6587\u5982\u4e0b&#xff1a;<\/p>\n<p>&#039;use strict&#039;<br \/>\nconst http &#061; require(&#039;http&#039;)<br \/>\nconst fs &#061; require(&#039;fs&#039;)<\/p>\n<p>const server &#061; http.createServer(function (req, res) {<br \/>\n  res.writeHead(200, { &#039;content-type&#039;: &#039;text\/plain&#039; })<\/p>\n<p>  fs.createReadStream(process.argv[3]).pipe(res)<br \/>\n})<\/p>\n<p>server.listen(Number(process.argv[2]))<\/p>\n<p>\u9010\u884c\u89e3\u8bfb&#xff1a;<\/p>\n<table>\n<tr>\u4ee3\u7801\u4f5c\u7528<\/tr>\n<tbody>\n<tr>\n<td>const http &#061; require(&#039;http&#039;)<\/td>\n<td>\u5f15\u5165 Node \u6838\u5fc3 http \u6a21\u5757<\/td>\n<\/tr>\n<tr>\n<td>const fs &#061; require(&#039;fs&#039;)<\/td>\n<td>\u5f15\u5165 Node \u6838\u5fc3 fs \u6a21\u5757<\/td>\n<\/tr>\n<tr>\n<td>http.createServer(callback)<\/td>\n<td>\u521b\u5efa HTTP \u670d\u52a1\u5668&#xff0c;\u6bcf\u6b21\u8bf7\u6c42\u89e6\u53d1\u56de\u8c03<\/td>\n<\/tr>\n<tr>\n<td>res.writeHead(200, { &#039;content-type&#039;: &#039;text\/plain&#039; })<\/td>\n<td>\u5199\u5165\u72b6\u6001\u7801 200 \u4e0e\u54cd\u5e94\u5934&#xff0c;\u58f0\u660e\u8fd4\u56de\u7eaf\u6587\u672c<\/td>\n<\/tr>\n<tr>\n<td>fs.createReadStream(process.argv[3]).pipe(res)<\/td>\n<td>\u5c06\u7b2c\u4e8c\u4e2a\u547d\u4ee4\u884c\u53c2\u6570\u6307\u5411\u7684\u6587\u4ef6\u4ee5\u6d41\u5f62\u5f0f\u7ba1\u9053\u5230\u54cd\u5e94<\/td>\n<\/tr>\n<tr>\n<td>server.listen(Number(process.argv[2]))<\/td>\n<td>\u76d1\u542c\u7b2c\u4e00\u4e2a\u547d\u4ee4\u884c\u53c2\u6570\u6307\u5b9a\u7684\u7aef\u53e3&#xff0c;Number() \u786e\u4fdd\u7aef\u53e3\u4e3a\u6570\u5b57\u7c7b\u578b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6ce8\u610f\u4e24\u70b9&#xff1a;\u7aef\u53e3\u53c2\u6570\u5efa\u8bae\u663e\u5f0f\u7528 Number() \u8f6c\u6362&#xff1b;\u6587\u4ef6\u8def\u5f84\u4e3a process.argv[3]&#xff0c;\u56e0\u4e3a argv[0] \u662f node \u53ef\u6267\u884c\u6587\u4ef6\u3001argv[1] \u662f\u811a\u672c\u8def\u5f84\u3002<\/p>\n<h3>\u4e94\u3001\u4ee3\u7801\u5b9e\u73b0\u7ec6\u8282\u4e0e\u8fb9\u754c\u6ce8\u610f<\/h3>\n<h4>1. \u4e3a\u4ec0\u4e48\u4e0d\u80fd\u53ea\u7528 fs.readFileSync \u4e00\u6b21\u6027\u8bfb\u5b8c<\/h4>\n<p>\u867d\u7136\u7528 fs.readFileSync() \u4e5f\u80fd&#034;\u8fd4\u56de\u6587\u4ef6\u5185\u5bb9&#034;&#xff0c;\u4f46\u8fd9\u6837\u505a&#xff1a;\u4e00\u662f\u628a\u6574\u4e2a\u6587\u4ef6\u8f7d\u5165\u5185\u5b58&#xff0c;\u5927\u6587\u4ef6\u573a\u666f\u4e0b\u5185\u5b58\u4e0d\u53ef\u63a7&#xff1b;\u4e8c\u662f\u963b\u585e\u4e86\u4e8b\u4ef6\u5faa\u73af&#xff1b;\u4e09\u662f\u4e0d\u7b26\u5408\u672c\u9898\u7684\u663e\u5f0f\u7ea6\u675f\u3002learnyounode \u7684\u9a8c\u8bc1\u5668\u751a\u81f3\u4f1a\u4e13\u95e8\u68c0\u6d4b\u8fd9\u4e00\u884c\u4e3a&#xff08;\u89c1\u4e0b\u6587\u7b2c\u516d\u8282&#xff09;&#xff0c;\u56e0\u6b64\u5fc5\u987b\u4f7f\u7528 fs.createReadStream()\u3002<\/p>\n<h4>2. response \u6d41\u7684\u7ed3\u675f\u65f6\u673a<\/h4>\n<p>\u4f7f\u7528 pipe \u65f6&#xff0c;\u7ba1\u9053\u673a\u5236\u4f1a\u81ea\u52a8\u5728\u6e90\u6d41\u7ed3\u675f\u540e\u8c03\u7528 res.end() \u7ed3\u675f\u54cd\u5e94&#xff0c;\u65e0\u9700\u624b\u52a8\u7ba1\u7406\u3002\u82e5\u6539\u7528 res.write() \u9010\u5757\u5199\u5165&#xff0c;\u5219\u5fc5\u987b\u81ea\u884c\u5728\u6570\u636e\u8bfb\u5b8c\u65f6\u8c03\u7528 res.end()\u3002<\/p>\n<h4>3. \u9519\u8bef\u5904\u7406&#xff08;\u5ef6\u4f38\u5efa\u8bae&#xff09;<\/h4>\n<p>\u6587\u4ef6\u4e0d\u5b58\u5728\u6216\u8bfb\u53d6\u5931\u8d25\u65f6&#xff0c;\u7ba1\u9053\u4e0d\u4f1a\u81ea\u52a8\u5411\u5ba2\u6237\u7aef\u62a5\u9519\u3002\u66f4\u5065\u58ee\u7684\u505a\u6cd5\u662f\u76d1\u542c\u6d41\u7684 error \u4e8b\u4ef6\u5e76\u8bbe\u7f6e\u9002\u5f53\u7684\u54cd\u5e94\u72b6\u6001\u7801&#xff1a;<\/p>\n<p>const stream &#061; fs.createReadStream(process.argv[3])<br \/>\nstream.on(&#039;error&#039;, function () {<br \/>\n  res.statusCode &#061; 500<br \/>\n  res.end(&#039;Internal Server Error&#039;)<br \/>\n})<br \/>\nstream.pipe(res)<\/p>\n<p>\u6807\u51c6\u7b54\u6848\u672a\u5305\u542b\u9519\u8bef\u5904\u7406\u4ee5\u4fdd\u6301\u7b80\u6d01&#xff0c;\u4f46\u8fd9\u662f\u751f\u4ea7\u73af\u5883\u7684\u91cd\u8981\u8865\u5145\u3002<\/p>\n<h3>\u516d\u3001\u6e90\u7801\u7ea7\u9a8c\u8bc1\u673a\u5236&#xff1a;\u5982\u4f55\u786e\u8ba4\u4f60\u7528\u4e86 createReadStream<\/h3>\n<p>\u672c\u9898\u7684\u9a8c\u8bc1\u903b\u8f91\u5728 exercises\/http_file_server\/exercise.js \u4e2d\u5b9e\u73b0&#xff0c;\u7406\u89e3\u5b83\u6709\u52a9\u4e8e\u5199\u51fa\u80fd\u901a\u8fc7\u9a8c\u8bc1\u7684\u7a0b\u5e8f\u3002<\/p>\n<h4>1. \u6d4b\u8bd5\u6570\u636e\u4e0e\u968f\u673a\u7aef\u53e3<\/h4>\n<p>\u9a8c\u8bc1\u5668\u5728 addSetup \u9636\u6bb5\u4f1a&#xff1a;<\/p>\n<ul>\n<li>\u8c03\u7528 lib\/rndport.js \u4e2d\u7684 rndport() \u751f\u6210\u968f\u673a\u7aef\u53e3&#xff08;\u5b9e\u73b0\u4e3a 1024 &#043; Math.floor(Math.random() * 64511)&#xff0c;\u5373 1024&#xff5e;65534 \u4e4b\u95f4&#xff09;&#xff0c;solution \u4e0e\u88ab\u6d4b\u7a0b\u5e8f\u5404\u7528\u4e00\u4e2a\u7aef\u53e3&#xff1b;<\/li>\n<li>\u7528 boganipsum \u751f\u6210\u4e00\u6bb5\u968f\u673a\u6587\u672c&#xff0c;\u5199\u5165\u7cfb\u7edf\u4e34\u65f6\u76ee\u5f55\u4e0b\u7684 _learnyounode_&lt;pid&gt;.txt \u6587\u4ef6&#xff0c;\u4f5c\u4e3a\u4e24\u4e2a\u8fdb\u7a0b\u5171\u540c\u4f7f\u7528\u7684\u6d4b\u8bd5\u6587\u4ef6&#xff1b;<\/li>\n<li>\u628a\u7aef\u53e3\u548c\u6587\u4ef6\u8def\u5f84\u4f9d\u6b21 unshift \u5230\u88ab\u6d4b\u7a0b\u5e8f\u4e0e\u6807\u51c6\u89e3\u7684\u547d\u4ee4\u884c\u53c2\u6570\u4e2d&#xff0c;\u5bf9\u5e94\u4ee3\u7801\u4e2d\u7684 process.argv[2]&#xff08;\u7aef\u53e3&#xff09;\u4e0e process.argv[3]&#xff08;\u6587\u4ef6\u8def\u5f84&#xff09;\u3002<\/li>\n<\/ul>\n<p>\u6d4b\u8bd5\u7ed3\u675f\u540e\u901a\u8fc7 rimraf \u6e05\u7406\u4e34\u65f6\u6587\u4ef6\u3002<\/p>\n<h4>2. \u63a2\u6d4b\u4e0e\u5bf9\u6bd4<\/h4>\n<p>\u9a8c\u8bc1\u5668\u5728\u5ef6\u8fdf 500ms&#xff08;\u7b49\u5f85\u670d\u52a1\u5668\u542f\u52a8&#xff09;\u540e&#xff0c;\u4f7f\u7528 hyperquest \u5411\u4e24\u4e2a\u7aef\u53e3\u53d1\u8d77 HTTP \u8bf7\u6c42&#xff0c;\u5e76\u5728 5 \u79d2\u8d85\u65f6\u540e\u7ed3\u675f\u54cd\u5e94\u6d41&#xff1b;\u968f\u540e\u901a\u8fc7 comparestdout \u5bf9\u6bd4\u88ab\u6d4b\u7a0b\u5e8f\u4e0e\u6807\u51c6\u89e3\u8f93\u51fa\u7684\u5185\u5bb9\u662f\u5426\u4e00\u81f4&#xff0c;\u56e0\u6b64\u8fd4\u56de\u7684\u6587\u4ef6\u5185\u5bb9\u5fc5\u987b\u4e0e\u6807\u51c6\u7b54\u6848\u5b8c\u5168\u76f8\u540c&#xff08;\u5305\u62ec\u6362\u884c\u4e0e\u968f\u673a\u6587\u672c\u672c\u8eab&#xff09;\u3002<\/p>\n<h4>3. createReadStream \u7684\u5f3a\u5236\u68c0\u6d4b<\/h4>\n<p>\u9a8c\u8bc1\u5668\u901a\u8fc7 wrappedexec \u5728\u88ab\u6d4b\u8fdb\u7a0b\u542f\u52a8\u524d\u6ce8\u5165 exercises\/my_first_io\/wrap.js \u8fd9\u4e2a\u5305\u88c5\u6a21\u5757\u3002\u8be5\u6a21\u5757\u904d\u5386 fs&#xff08;\u53ca fs.promises\u3001util&#xff09;\u7684\u6240\u6709\u65b9\u6cd5\u5e76\u9010\u4e00\u5305\u88f9&#xff0c;\u501f\u52a9\u8c03\u7528\u6808\u5224\u65ad\u7528\u6237\u4e3b\u7a0b\u5e8f\u662f\u5426\u8c03\u7528\u4e86\u5bf9\u5e94 fs \u65b9\u6cd5&#xff0c;\u628a\u8c03\u7528\u8bb0\u5f55\u4fdd\u5b58\u5728 ctx.fsCalls \u4e2d\u3002<\/p>\n<p>\u968f\u540e&#xff0c;exercise.js \u4e2d\u7684 addVerifyProcessor \u5bf9\u6240\u6709\u88ab\u8bb0\u5f55\u7684\u975e createReadStream \u7684 fs \u8c03\u7528\u9010\u4e00\u89e6\u53d1\u5931\u8d25\u63d0\u793a fail.no_createReadStream&#xff0c;\u5e76\u8981\u6c42 badCalls.length &#061;&#061;&#061; 0 \u624d\u7b97\u901a\u8fc7&#xff1a;<\/p>\n<p>const badCalls &#061; Object.keys(exercise.wrapData.fsCalls).filter(function (m) {<br \/>\n  exercise.emit(&#039;fail&#039;, exercise.__(&#039;fail.no_createReadStream&#039;, { method: &#039;fs.&#039; &#043; m &#043; &#039;()&#039; }))<br \/>\n  return !(\/createReadStream\/).test(m)<br \/>\n})<br \/>\ncallback(null, badCalls.length &#061;&#061;&#061; 0)<\/p>\n<p>\u5373&#xff1a;\u51e1\u662f\u88ab\u68c0\u6d4b\u5230\u7684 fs \u8c03\u7528&#xff0c;\u65b9\u6cd5\u540d\u90fd\u5fc5\u987b\u5339\u914d createReadStream&#xff0c;\u5426\u5219\u9a8c\u8bc1\u5931\u8d25\u3002\u8fd9\u610f\u5473\u7740\u4f7f\u7528 fs.readFileSync\u3001fs.readFile \u7b49\u4efb\u4f55\u5176\u4ed6 fs \u65b9\u6cd5\u90fd\u4f1a\u88ab\u5224\u5b9a\u4e3a\u9519\u8bef\u7b54\u6848\u3002<\/p>\n<h4>4. \u6d4b\u8bd5\u7528\u4f8b\u4f50\u8bc1<\/h4>\n<p>\u4ed3\u5e93 test\/http_file_server \u76ee\u5f55\u4e0b\u7684\u7528\u4f8b\u5370\u8bc1\u4e86\u4e0a\u8ff0\u5224\u5b9a\u89c4\u5219&#xff1a;<\/p>\n<ul>\n<li>test\/http_file_server\/valid_01.js&#xff1a;\u5408\u6cd5\u5b9e\u73b0&#xff0c;\u901a\u8fc7 require(&#039;fs&#039;).createReadStream(process.argv[3]).pipe(res) \u6d41\u5f0f\u8fd4\u56de\u6587\u4ef6&#xff0c;\u5e76\u4e14\u7528 process.argv[2] | 0 \u628a\u7aef\u53e3\u53c2\u6570\u8f6c\u6210\u6574\u6570&#xff1b;<\/li>\n<li>test\/http_file_server\/invalid_02.js&#xff1a;\u9519\u8bef\u5b9e\u73b0&#xff0c;\u5728\u670d\u52a1\u5668\u56de\u8c03\u5916\u5148\u8c03\u7528 fs.readFileSync(process.argv[3])&#xff0c;\u54cd\u5e94\u4e2d\u53c8\u7528 res.end(require(&#039;fs&#039;).readFileSync(&#8230;)) \u4e00\u6b21\u6027\u8fd4\u56de&#xff0c;\u5c5e\u4e8e\u5178\u578b\u53cd\u4f8b&#xff1b;<\/li>\n<li>test\/http_file_server\/invalid_03.js&#xff1a;\u53e6\u4e00\u9519\u8bef\u5b9e\u73b0&#xff0c;\u9519\u628a\u6587\u4ef6\u8def\u5f84\u5f53\u4f5c process.argv[2] \u8bfb\u53d6&#xff0c;\u5e76\u540c\u6837\u4f7f\u7528 readFileSync \u800c\u975e\u6d41\u3002<\/li>\n<\/ul>\n<p>\u5bf9\u6bd4 valid_01.js \u4e0e\u4e24\u4e2a invalid \u7528\u4f8b&#xff0c;\u53ef\u4ee5\u76f4\u89c2\u770b\u51fa&#034;\u7528 createReadStream \u7ba1\u9053 &#043; \u6b63\u786e\u7d22\u5f15\u547d\u4ee4\u884c\u53c2\u6570&#034;\u662f\u672c\u9898\u552f\u4e00\u901a\u8fc7\u8def\u5f84\u3002<\/p>\n<h3>\u4e03\u3001\u5e38\u89c1\u9519\u8bef\u4e0e\u6392\u67e5\u5efa\u8bae<\/h3>\n<li>\u8bef\u7528 fs.readFileSync \/ fs.readFile&#xff1a;\u4f1a\u88ab\u7b2c\u516d\u8282\u7684\u9a8c\u8bc1\u5904\u7406\u5668\u76f4\u63a5\u5224\u4e3a\u5931\u8d25\u3002\u52a1\u5fc5\u4f7f\u7528 fs.createReadStream().pipe(res)\u3002<\/li>\n<li>\u547d\u4ee4\u884c\u53c2\u6570\u7d22\u5f15\u9519\u8bef&#xff1a;\u7aef\u53e3\u5728 process.argv[2]&#xff0c;\u6587\u4ef6\u8def\u5f84\u5728 process.argv[3]\u3002\u82e5\u6df7\u6dc6&#xff08;\u5982 invalid_03.js \u6240\u793a&#xff09;&#xff0c;\u6587\u4ef6\u8bfb\u53d6\u4f1a\u5931\u8d25\u6216\u76d1\u542c\u7aef\u53e3\u9519\u8bef\u3002<\/li>\n<li>\u5fd8\u8bb0 server.listen()&#xff1a;\u53ea\u521b\u5efa\u670d\u52a1\u5668\u800c\u4e0d\u76d1\u542c&#xff0c;\u9a8c\u8bc1\u5668\u7684 hyperquest \u63a2\u6d4b\u4f1a\u56e0\u8fde\u63a5\u5931\u8d25\u800c\u62a5 fail.connection\u3002<\/li>\n<li>\u7aef\u53e3\u7c7b\u578b\u95ee\u9898&#xff1a;listen \u671f\u671b\u6570\u5b57&#xff0c;\u76f4\u63a5\u4f20\u5b57\u7b26\u4e32\u5728\u90e8\u5206\u573a\u666f\u4e0b\u4e5f\u80fd\u5de5\u4f5c&#xff0c;\u4f46\u5efa\u8bae\u50cf\u6807\u51c6\u7b54\u6848\u4e00\u6837\u7528 Number(process.argv[2]) \u6216 | 0 \u663e\u5f0f\u8f6c\u6362\u3002<\/li>\n<li>\u54cd\u5e94\u5934\u7f3a\u5931&#xff1a;\u867d\u7136\u5f53\u524d\u9a8c\u8bc1\u5668\u53ea\u5bf9\u6bd4\u8f93\u51fa\u5185\u5bb9&#xff08;exercise.js \u4e2d query() \u5185\u7684 content-type \u6821\u9a8c\u4ee5 TODO \u6ce8\u91ca\u5f62\u5f0f\u5b58\u5728&#xff0c;\u5c1a\u672a\u542f\u7528&#xff09;&#xff0c;\u4f46 res.writeHead(200, { &#039;content-type&#039;: &#039;text\/plain&#039; }) \u4ecd\u662f\u6b63\u786e\u3001\u5b8c\u6574\u7684\u5199\u6cd5&#xff0c;\u5efa\u8bae\u4fdd\u7559\u3002<\/li>\n<li>\u8bf7\u6c42\u5904\u7406\u903b\u8f91\u4e0e\u5185\u5bb9\u65e0\u5173&#xff1a;\u672c\u9898\u8981\u6c42&#034;\u5bf9\u6240\u6709\u8bf7\u6c42\u8fd4\u56de\u540c\u4e00\u4e2a\u6587\u4ef6&#034;&#xff0c;\u56de\u8c03\u5185\u65e0\u9700\u89e3\u6790\u8bf7\u6c42\u8def\u5f84\u6216\u65b9\u6cd5&#xff0c;\u76f4\u63a5\u7ba1\u9053\u6587\u4ef6\u6d41\u5373\u53ef\u3002<\/li>\n<h3>\u516b\u3001\u5c0f\u7ed3<\/h3>\n<p>http_file_server \u662f learnyounode \u4e2d\u4ece&#034;\u8bfb\u6587\u4ef6&#034;\u8d70\u5411&#034;\u5199\u670d\u52a1\u5668&#034;\u7684\u5173\u952e\u4e00\u73af&#xff1a;\u5b83\u540c\u65f6\u8003\u5bdf\u4e86 http \u6a21\u5757\u7684\u670d\u52a1\u5668\u521b\u5efa\u3001request\/response \u7684\u6d41\u672c\u8d28\u3001fs.createReadStream() \u7684\u6587\u4ef6\u6d41 API \u4ee5\u53ca pipe \u7ba1\u9053\u4f20\u8f93\u3002\u4ece\u4ed3\u5e93\u6e90\u7801\u53ef\u4ee5\u786e\u8ba4&#xff0c;\u5176\u9a8c\u8bc1\u5668\u4e0d\u4ec5\u5bf9\u6bd4\u8f93\u51fa\u5185\u5bb9&#xff0c;\u8fd8\u4f1a\u901a\u8fc7\u5305\u88c5 fs \u65b9\u6cd5\u7684\u65b9\u5f0f\u5f3a\u5236\u68c0\u6d4b createReadStream \u7684\u4f7f\u7528&#xff0c;\u4f53\u73b0\u4e86 learnyounode \u5f3a\u8c03\u6b63\u786e\u6280\u672f\u9009\u578b&#xff08;\u6d41\u5f0f\u800c\u975e\u6574\u8bfb&#xff09;\u7684\u8bbe\u8ba1\u610f\u56fe\u3002\u638c\u63e1\u672c\u9898\u540e&#xff0c;\u4f60\u53ef\u4ee5\u81ea\u7136\u8fc7\u6e21\u5230\u540e\u7eed http_uppercaserer\u3001http_json_api_server \u7b49\u57fa\u4e8e HTTP \u6d41\u7684\u8fdb\u9636\u7ec3\u4e60\u3002<\/p>\n<h3>\u5ef6\u4f38\u9605\u8bfb<\/h3>\n<ul>\n<li>HTTP \u6587\u4ef6\u670d\u52a1\u5668\u9898\u76ee&#xff08;\u82f1\u6587&#xff09;<\/li>\n<li>HTTP \u6587\u4ef6\u670d\u52a1\u5668\u9898\u76ee&#xff08;\u7b80\u4f53\u4e2d\u6587&#xff09;<\/li>\n<li>\u6807\u51c6\u7b54\u6848<\/li>\n<li>\u9a8c\u8bc1\u5668\u5b9e\u73b0<\/li>\n<li>fs \u65b9\u6cd5\u5305\u88c5\u68c0\u6d4b\u6a21\u5757<\/li>\n<li>\u968f\u673a\u7aef\u53e3\u5de5\u5177<\/li>\n<li>Node.js http \u6a21\u5757\u6587\u6863&#xff08;\u4ed3\u5e93\u955c\u50cf&#xff09;<\/li>\n<li>nodejs \u5b98\u65b9\u6587\u6863\u955c\u50cf\u76ee\u5f55<\/li>\n<\/ul>\n<p>  <img loading=\"lazy\" decoding=\"async\" class=\"gcb-icon-like\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260929030102-6abb29eea079c.svg\" alt=\"\" width=\"16\" height=\"16\" \/> <span class=\"gcb-like-text\">\u8d5e<\/span>  <\/p>\n<p>   <span class=\"gcb-share-text\">\u5206\u4eab<\/span>  <\/p>\n<ul class=\"gcb-tag-list\">\n<li><span class=\"gcb-tag\">\u6559\u7a0b<\/span><\/li>\n<li><span class=\"gcb-tag\">CLI<\/span><\/li>\n<\/ul>\n<h3 class=\"gcb-project-title\">\u3010\u514d\u8d39\u4e0b\u8f7d\u94fe\u63a5\u3011learnyounode<\/h3>\n<p class=\"gcb-project-desc\">Learn You The Node.js For Much Win! An intro to Node.js via a set of self-guided workshops.<\/p>\n<p>    <span class=\"gcb-project-addr-label\">\u9879\u76ee\u5730\u5740&#xff1a;<\/span><br \/>\n    <span class=\"gcb-project-addr-link\">https:\/\/gitcode.com\/gh_mirrors\/le\/learnyounode<\/span> <\/p>\n<p>  <span class=\"gcb-project-btn\"> <span class=\"gcb-project-btn-main\">\u70b9\u51fb\u67e5\u770b<\/span> <span class=\"gcb-project-btn-sub\">\u514d\u8d39\u4e0b\u8f7d<\/span> <\/span> <\/p>\n<h4 class=\"gcb-related-title\">\u76f8\u5173\u63a8\u8350<\/h4>\n<ul class=\"gcb-related-list\">\n<li class=\"gcb-related-item\">\n<h5 class=\"gcb-related-item-title\">learnyounode \u5b9e\u6218&#xff1a;\u7528 Node.js http \u6a21\u5757\u4e0e fs.createReadStream \u6784\u5efa HTTP \u6587\u4ef6\u670d\u52a1\u5668&#xff08;HTTP FILE SERVER&#xff09;<\/h5>\n<p class=\"gcb-related-item-desc\">learnyounode \u5b9e\u6218&#xff1a;\u7528 Node.js http \u6a21\u5757\u4e0e fs.createReadStream \u6784\u5efa HTTP \u6587\u4ef6\u670d\u52a1\u5668&#xff08;HTTP FILE S<\/p>\n<p>     <span class=\"gcb-tag\">\u6559\u7a0b<\/span><br \/>\n     <span class=\"gcb-tag\">CLI<\/span>\n      <\/li>\n<li class=\"gcb-related-item\">\n<h5 class=\"gcb-related-item-title\">learnyounode \u5b9e\u6218&#xff1a;\u7528 Node http \u6a21\u5757\u4e0e fs.createReadStream \u6784\u5efa HTTP \u6587\u4ef6\u670d\u52a1\u5668<\/h5>\n<p class=\"gcb-related-item-desc\">learnyounode \u5b9e\u6218&#xff1a;\u7528 Node http \u6a21\u5757\u4e0e fs.createReadStream \u6784\u5efa HTTP \u6587\u4ef6\u670d\u52a1\u5668 \u672c\u6587\u57fa\u4e8e learnyoun<\/p>\n<p>     <span class=\"gcb-tag\">\u6559\u7a0b<\/span><br \/>\n     <span class=\"gcb-tag\">CLI<\/span>\n      <\/li>\n<li class=\"gcb-related-item\">\n<h5 class=\"gcb-related-item-title\">learnyounode \u5b9e\u6218&#xff1a;\u7528 Node.js \u7684 &#096;http&#096; \u6a21\u5757\u4e0e &#096;fs.createReadStream()&#096; \u6784\u5efa HTTP \u6587\u4ef6\u670d\u52a1\u5668&#xff08;http_file_server \u7ec3\u4e60&#xff09;<\/h5>\n<p class=\"gcb-related-item-desc\">learnyounode \u5b9e\u6218&#xff1a;\u7528 Node.js \u7684 http \u6a21\u5757\u4e0e fs.createReadStream \u6784\u5efa HTTP \u6587\u4ef6\u670d\u52a1\u5668&#xff08;http_file<\/p>\n<p>     <span class=\"gcb-tag\">\u6559\u7a0b<\/span><br \/>\n     <span class=\"gcb-tag\">CLI<\/span>\n      <\/li>\n<\/ul>\n<p>  <span class=\"gcb-prev-next-label\">\u4e0a\u4e00\u7bc7&#xff1a;<\/span><br \/>\n  Umi-OCR\u5feb\u901f\u4e0a\u624b\u6307\u5357&#xff1a;5\u5206\u949f\u638c\u63e1\u79bb\u7ebfOCR\u6838\u5fc3\u6280\u5de7 <\/p>\n<p>  <span class=\"gcb-prev-next-label\">\u4e0b\u4e00\u7bc7&#xff1a;<\/span><br \/>\n  Python\u901a\u8fbe\u4fe1\u6570\u636e\u83b7\u53d6\u5b8c\u6574\u6559\u7a0b&#xff1a;\u4ece\u96f6\u5f00\u59cb\u638c\u63e1\u91d1\u878d\u6570\u636e\u5206\u6790 <\/p>\n<p>\u521b\u4f5c\u58f0\u660e\uff1a\u672c\u6587\u90e8\u5206\u5185\u5bb9\u7531AI\u8f85\u52a9\u751f\u6210\uff08AIGC\uff09\uff0c\u4ec5\u4f9b\u53c2\u8003<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6559\u7a0bCLI \u3010\u514d\u8d39\u4e0b\u8f7d\u94fe\u63a5\u3011learnyounode Learn You The Node.js For Much Win! 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