[Nodejs] node实现静态文件服务器 -云博客

[Nodejs] node实现静态文件服务器

# 前端 2024-05-05 03:58 0 34 来源：云博客

node 静态文件处理

一般后端进行静态文件处理都是使用 Apache nginx 等静态 web 服务器,但是既然使用 node 了,就用 node 实现以下静态服务器吧.

之前弄了不少充满艺术的数据,就弄个页面进行艺术欣赏吧

app.js

 "/": (request, response) => { response.writeHead(200, { "content-type": "text/html;charset=utf-8" }); let stream = fs.createReadStream( path.join(__dirname, "/views/index.html") ); stream.on("error", function() { response.writeHead(500, { "content-type": "text/html;charset=utf-8" }); response.end("<h1>500 Server Error</h1>"); }); stream.pipe(response); },

views/index.html/index.js/index.css

<!DOCTYPE html><html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta http-equiv="X-UA-Compatible" content="ie=edge" /> <title>时尚风范</title> <link rel="stylesheet" href="./index.css" type="text/css" /> <script src="./index.js"></script> </head> <body> <div class="img-list"> <div class="header">我是写真集</header> </div> </body></html>

但是打开之后什么都不能看,css 和 js 在控制台都是 404 显示.因为服务器没有写相应的代码去处理这些文件,所以接收到请求,服务器也是一脸茫然,不知道究竟要干什么.

所有我们要对请求的资源做出相对应的回答,那怕是个 404

添加 css 和 js 的支持

"/index.css": (request, response) => { response.writeHead(200, { "content-type": "text/css;chartset=utf-8" }); let stream = fs.createReadStream( path.join(__dirname, "/views/index.css") ); stream.on("error", function() { response.writeHead(500, { "content-type": "text/html;charset=utf-8" }); response.end("<h1>500 Server Error</h1>"); }); stream.pipe(response); }, "/index.js": (request, response) => { response.writeHead(200, { "content-type": "text/javasvript;chartset=utf-8" }); let stream = fs.createReadStream( path.join(__dirname, "/views/index.js") ); stream.on("error", function() { response.writeHead(500, { "content-type": "text/html;charset=utf-8" }); response.end("<h1>500 Server Error</h1>"); }); stream.pipe(response); },

这样就正常的加载和执行 css 和 js 了,但是代码灵活性不够,重复率太高.

静态资源服务器

区分路由

...if (pathname !== "/favicon.ico") { if (path.extname(pathname) === "") { router(pathname)(request, response); } else { assets(pathname)(request, response); }}...

添加静态资源处理

function assets(p) { let ext = path.extname(p); ext = ext ? ext.slice(1) : "unknown"; let contentType = getMime(ext); contentType += ";charset=utf-8"; let filePath; if (/image/.test(contentType)) { filePath = path.join(static_path, p); } else { filePath = path.join(public_path, p); } return async function(request, response) { try { let stats = await stat(filePath); if (stats && stats.isFile()) { readFile(response, filePath, contentType); } } catch (err) { console.log(err); } };}

我们需要根据文件类型做相应处理

对不同的文件进行不同的响应头处理

module.exports = { getMime: function(ext) { let mime = { css: "text/css", gif: "image/gif", html: "text/html", ico: "image/x-icon", jpeg: "image/jpeg", jpg: "image/jpeg", js: "text/javascript", json: "application/json", pdf: "application/pdf", png: "image/png", svg: "image/svg+xml", swf: "application/x-shockwave-flash", tiff: "image/tiff", txt: "text/plain", wav: "audio/x-wav", wma: "audio/x-ms-wma", wmv: "video/x-ms-wmv", xml: "text/xml" }; return mime[ext] || "text/plain"; }};

加载相应的静态文件

function readFile(response, filePath, contentType) { response.writeHead(200, { "content-type": contentType }); let stream = fs.createReadStream(filePath); stream.on("error", function() { response.writeHead(500, { "content-type": contentType }); response.end("<h1>500 Server Error</h1>"); }); stream.pipe(response);}

index.js

window.onload = function() { let path = "http://127.0.0.1:9527/mrw/%E5%B0%8F%E6%B2%AB%E7%90%B3%E3%80%8A%E8%8B%8F%E6%A2%85%E5%B2%9B%E6%97%85%E6%8B%8D%E5%86%99%E7%9C%9F%E3%80%8B%20[%E8%8A%B1%E3%81%AE%E9%A2%9CHuaYan]%20Vol.057%20%E5%86%99%E7%9C%9F%E9%9B%86/%E5%B0%8F%E6%B2%AB%E7%90%B3%E3%80%8A%E8%8B%8F%E6%A2%85%E5%B2%9B%E6%97%85%E6%8B%8D%E5%86%99%E7%9C%9F%E3%80%8B%20[%E8%8A%B1%E3%81%AE%E9%A2%9CHuaYan]%20Vol.057%20%E5%86%99%E7%9C%9F%E9%9B%86_image"; let suffix = ".jpg"; let content = document.createElement("div"); let body = document.getElementsByTagName("body")[0]; content.setAttribute("class", "content"); for (let i = 0; i < 56; i++) { let item = document.createElement("img"); item.setAttribute("src", `${path}${i}${suffix}`); content.appendChild(item); } body.appendChild(content);};