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| "use strict"; //加载所需要的模块 var http = require('http'); var url = require('url'); var fs = require('fs'); var path = require('path'); var cp = require('child_process');
//创建服务 var httpServer = http.createServer(processRequest);
var port = 8080;
//指定一个监听的接口 httpServer.listen(port, function() { console.log(`app is running at port:${port}`); console.log(`url: http://localhost:${port}`); cp.exec(`explorer http://localhost:${port}`, function () { }); });
//响应请求的函数 function processRequest (request, response) { //mime类型 var 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" }; //request里面切出标识符字符串 var requestUrl = request.url; //url模块的parse方法 接受一个字符串,返回一个url对象,切出来路径 var pathName = url.parse(requestUrl).pathname;
//对路径解码,防止中文乱码 var pathName = decodeURI(pathName);
//解决301重定向问题,如果pathname没以/结尾,并且没有扩展名 if (!pathName.endsWith('/') && path.extname(pathName) === '') { pathName += '/'; var redirect = "http://" + request.headers.host + pathName; response.writeHead(301, { location: redirect }); //response.end方法用来回应完成后关闭本次对话,也可以写入HTTP回应的具体内容。 response.end(); }
//获取资源文件的绝对路径 var filePath = path.resolve(__dirname + pathName); console.log(filePath); //获取对应文件的文档类型 //我们通过path.extname来获取文件的后缀名。由于extname返回值包含”.”,所以通过slice方法来剔除掉”.”, //对于没有后缀名的文件,我们一律认为是unknown。 var ext = path.extname(pathName); ext = ext ? ext.slice(1) : 'unknown';
//未知的类型一律用"text/plain"类型 var contentType = mime[ext] || "text/plain";
fs.stat(filePath, (err, stats) => { if (err) { response.writeHead(404, { "content-type": "text/html" }); response.end("<h1>404 Not Found</h1>"); } //没出错 并且文件存在 if (!err && stats.isFile()) { readFile(filePath, contentType); } //如果路径是目录 if (!err && stats.isDirectory()) { var html = "<head><meta charset = 'utf-8'/></head><body><ul>"; //读取该路径下文件 fs.readdir(filePath, (err, files) => { if (err) { console.log("读取路径失败!"); } else { //做成一个链接表,方便用户访问 var flag = false; for (var file of files) { //如果在目录下找到index.html,直接读取这个文件 if (file === "index.html") { readFile(filePath + (filePath[filePath.length-1]=='/' ? '' : '/') + 'index.html', "text/html"); flag = true; break; }; html += `<li><a href='${file}'>${file}</a></li>`; } if(!flag) { html += '</ul></body>'; response.writeHead(200, { "content-type": "text/html" }); response.end(html); } } }); }
//读取文件的函数 function readFile(filePath, contentType){ response.writeHead(200, { "content-type": contentType }); //建立流对象,读文件 var stream = fs.createReadStream(filePath); //错误处理 stream.on('error', function() { response.writeHead(500, { "content-type": contentType }); response.end("<h1>500 Server Error</h1>"); }); //读取文件 stream.pipe(response); } }); }
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