1、模块化的方式封装

routes.js:

const http = require('http');
const fs = require('fs');
const path = require('path')
const url = require('url')
const ejs = require('ejs')
let getFileMime = function (extname) {// 把异步读取文件方法改为同步读取文件方法let data = fs.readFileSync('./data/mime.json');let mimeObj = JSON.parse(data.toString())console.log(mimeObj[extname])return mimeObj[extname]
}
let app = {static: (req, res, staticPath) => {// 1. 获取地址console.log(req.url)let pathname = url.parse(req.url).pathname// 默认加载index.htmlif (pathname == '/') {pathname = '/index.html'} else {pathname = pathname}// 获取路径中的后缀名let extname = path.extname(pathname)// 2.通过fs模块读取文件if (pathname != '/favicon.ico') {try {// 把异步读取文件方法改为同步读取文件方法let data = fs.readFileSync('./' + staticPath + pathname);if (data) {let mine = getFileMime(extname)res.writeHead(200, { 'Content-Type': '' + mine + ';charset="utf-8"' });res.end(data);}} catch (error) {}}},login: (req, res) => {ejs.renderFile('./views/form.ejs',{}, (err,data)=> {res.writeHead(200, {'Content-Type': 'text/html;charset="utf-8"'})  res.end(data)})},doLogin: (req, res)=> {// 获取post传值let postData = '';//以流的方式读取req.on('data', (chunk)=> {postData += chunk;})// 当流读取结束，会触发endreq.on('end', ()=> {console.log(postData);res.end(postData);})}, error: (req, res)=> {res.end('error!')}}module.exports = app;
/*
调用方式：1. app.login(req,res)2. app['login](req,res)*/

app.js:

// nodejs 创建一个静态资源服务器const http = require('http');
const url = require('url');
const routes = require('./module/routes')
const ejs = require('ejs')
http.createServer(function (req, res) {// 创建静态web服务器routes.static(req, res, 'static')// 路由let pathname = url.parse(req.url).pathname;// http://127.0.0.1:3000/login  pathname = /loginpathname = pathname.replace("/", "") try {routes[pathname](req, res)} catch (error) {routes['error'](req, res)}// 获取请求类型console.log(req.method)/* if (pathname == '/login') {ejs.renderFile('./views/form.ejs', {}, (err, data)=> {res.writeHead(200, { 'Content-Type': 'text/html;charset="utf-8"' });res.end(data)}) *//* // 获取get传值var query = url.parse(req.url, true).queryconsole.log(query)res.writeHead(200, { 'Content-Type': 'text/html;charset="utf-8"' });res.end('get传值获取成功') *//* res.writeHead(200, { 'Content-Type': 'text/html;charset="utf-8"' });res.end("执行登录") *//*  let msg = "数据库里面获取的数据";let list = [{title: '新闻111'},{title: '新闻222'},{title: '新闻333'},{title: '新闻444'},{title: '新闻555'},]ejs.renderFile('./views/login.ejs', {msg: msg,list: list}, (err, data)=> {res.writeHead(200, { 'Content-Type': 'text/html;charset="utf-8"' });res.end(data)}) *//* } else if (pathname == '/doLogin') {// 获取post传值let postData = '';//以流的方式读取req.on('data', (chunk)=> {postData += chunk;})// 当流读取结束，会触发endreq.on('end', ()=> {console.log(postData);res.end(postData);})} else if (pathname == '/admin') {res.writeHead(200, { 'Content-Type': 'text/html;charset="utf-8"' });res.end("处理客户端的业务逻辑")} else {res.writeHead(404, { 'Content-Type': 'text/html;charset="utf-8"' });res.end("页面不存在")}*/
}).listen(8081);console.log('Server running at http://127.0.0.1:8081/');

1、封装仿照 express 的路由

Express 官网：https://www.expressjs.com.cn/

var express = require('express')
var app = express()
app.get("/", function (req, res) { res.send('hello world')
})app.get("/login", function (req, res) { res.send('hello world')
})app.post("/doLogin", function (req, res) { res.send('POST request to the homepage')
})

2. 按照express框架的调用方式来封装路由：

1. 封装get方法的路由

routes.js:

const url = require('url')let G = {}
let app = function (req, res) {// 路由let pathname = url.parse(req.url).pathname;// http://127.0.0.1:3000/login  pathname = /loginif (G[pathname]) {G[pathname](req, res); // 表示执行方法}else {res.writeHead(404, {'Content-Type': 'text/html;charset="utf-8"'});res.end('页面不存在');}
}
app.get = function (string, callback) {// 注册方法G[string] = callback/* G['/login'] = function(req, res) {res.send('hello world')}*/// console.log('get方法')
}
app.post = function () {console.log('post方法')
}module.exports = app

app.js :

const http = require("http");
const app = require('./module/routes')// 注册web服务
http.createServer(app).listen(3000);console.log('Server running at http://127.0.0.1:3000/');// 配置路由
app.get('/', function(req, res) {res.writeHead(200, {'Content-Type': 'text/html;charset="utf-8"'});res.end('首页');
})// 配置路由
app.get('/login', function(req, res) {res.writeHead(200, {'Content-Type': 'text/html;charset="utf-8"'});res.end('执行登录操作');
})

2. 在上面代码的基础上

1）封装post方法的路由

2）以及扩展res的方法，即为res增加一个send()

3）把get 和 post分开保存

routes.js :

const url = require('url')function changeRes(res) {res.send = (data) => {res.writeHead(200, { 'Content-Type': 'text/html;charset="utf-8"' });res.end(data);}
}let server = () => {let G = {}// 把get 和 post分开保存G._get = {}G._post = {}let app = function (req, res) {// 扩展res的方法changeRes(res)// 路由let pathname = url.parse(req.url).pathname;// http://127.0.0.1:3000/login  pathname = /login// 获取请求类型let method = req.method.toLowerCase()if (G['_' + method][pathname]) {if (method == "get") {G['_' + method][pathname](req, res); // 表示执行方法} else {// post  获取post的数据  把它绑定到req.body上let postData = '';req.on('data', (chunk) => {postData += chunk;})req.on('end', () => {console.log(postData)req.body = postDataG._post[pathname](req, res); // 表示执行方法})}} else {res.writeHead(404, { 'Content-Type': 'text/html;charset="utf-8"' });res.end('页面不存在');}}app.get = function (string, callback) {// 注册方法G._get[string] = callback/* G['/login'] = function(req, res) {res.send('hello world')}*/// console.log('get方法')}app.post = function (string, callback) {// 注册方法G._post[string] = callback}return app;}
module.exports = server()

app.js :

const http = require("http");
const ejs = require('ejs');
const app = require('./module/routes');// 注册web服务
http.createServer(app).listen(3000);console.log('Server running at http://127.0.0.1:3000/');// 配置路由
app.get('/', function (req, res) {res.send('首页');
})// 配置路由
app.get('/login', function (req, res) {ejs.renderFile('./views/form.ejs', {}, (err, data) => {res.send(data)})
})app.post('/doLogin', function (req, res) {res.send('执行登录操作' + req.body);
})

2. 封装静态web资源服务：

当页面中引入了类似js, img，css等文件时，会出现这些静态资源访问不到的问题，如下所示：

1. 定义getFileMime方法，根据文件后缀名获取文件类型：
   

mime.json:

{ ".323":"text/h323" ,".3gp":"video/3gpp" ,".aab":"application/x-authoware-bin" ,".aam":"application/x-authoware-map" ,".aas":"application/x-authoware-seg" ,".acx":"application/internet-property-stream" ,".ai":"application/postscript" ,".aif":"audio/x-aiff" ,".aifc":"audio/x-aiff" ,".aiff":"audio/x-aiff" ,".als":"audio/X-Alpha5" ,".amc":"application/x-mpeg" ,".ani":"application/octet-stream" ,".apk":"application/vnd.android.package-archive" ,".asc":"text/plain" ,".asd":"application/astound" ,".asf":"video/x-ms-asf" ,".asn":"application/astound" ,".asp":"application/x-asap" ,".asr":"video/x-ms-asf" ,".asx":"video/x-ms-asf" ,".au":"audio/basic" ,".avb":"application/octet-stream" ,".avi":"video/x-msvideo" ,".awb":"audio/amr-wb" ,".axs":"application/olescript" ,".bas":"text/plain" ,".bcpio":"application/x-bcpio" ,".bin ":"application/octet-stream" ,".bld":"application/bld" ,".bld2":"application/bld2" ,".bmp":"image/bmp" ,".bpk":"application/octet-stream" ,".bz2":"application/x-bzip2" ,".c":"text/plain" ,".cal":"image/x-cals" ,".cat":"application/vnd.ms-pkiseccat" ,".ccn":"application/x-cnc" ,".cco":"application/x-cocoa" ,".cdf":"application/x-cdf" ,".cer":"application/x-x509-ca-cert" ,".cgi":"magnus-internal/cgi" ,".chat":"application/x-chat" ,".class":"application/octet-stream" ,".clp":"application/x-msclip" ,".cmx":"image/x-cmx" ,".co":"application/x-cult3d-object" ,".cod":"image/cis-cod" ,".conf":"text/plain" ,".cpio":"application/x-cpio" ,".cpp":"text/plain" ,".cpt":"application/mac-compactpro" ,".crd":"application/x-mscardfile" ,".crl":"application/pkix-crl" ,".crt":"application/x-x509-ca-cert" ,".csh":"application/x-csh" ,".csm":"chemical/x-csml" ,".csml":"chemical/x-csml" ,".css":"text/css" ,".cur":"application/octet-stream" ,".dcm":"x-lml/x-evm" ,".dcr":"application/x-director" ,".dcx":"image/x-dcx" ,".der":"application/x-x509-ca-cert" ,".dhtml":"text/html" ,".dir":"application/x-director" ,".dll":"application/x-msdownload" ,".dmg":"application/octet-stream" ,".dms":"application/octet-stream" ,".doc":"application/msword" ,".docx":"application/vnd.openxmlformats-officedocument.wordprocessingml.document" ,".dot":"application/msword" ,".dvi":"application/x-dvi" ,".dwf":"drawing/x-dwf" ,".dwg":"application/x-autocad" ,".dxf":"application/x-autocad" ,".dxr":"application/x-director" ,".ebk":"application/x-expandedbook" ,".emb":"chemical/x-embl-dl-nucleotide" ,".embl":"chemical/x-embl-dl-nucleotide" ,".eps":"application/postscript" ,".epub":"application/epub+zip" ,".eri":"image/x-eri" ,".es":"audio/echospeech" ,".esl":"audio/echospeech" ,".etc":"application/x-earthtime" ,".etx":"text/x-setext" ,".evm":"x-lml/x-evm" ,".evy":"application/envoy" ,".exe":"application/octet-stream" ,".fh4":"image/x-freehand" ,".fh5":"image/x-freehand" ,".fhc":"image/x-freehand" ,".fif":"application/fractals" ,".flr":"x-world/x-vrml" ,".flv":"flv-application/octet-stream" ,".fm":"application/x-maker" ,".fpx":"image/x-fpx" ,".fvi":"video/isivideo" ,".gau":"chemical/x-gaussian-input" ,".gca":"application/x-gca-compressed" ,".gdb":"x-lml/x-gdb" ,".gif":"image/gif" ,".gps":"application/x-gps" ,".gtar":"application/x-gtar" ,".gz":"application/x-gzip" ,".h":"text/plain" ,".hdf":"application/x-hdf" ,".hdm":"text/x-hdml" ,".hdml":"text/x-hdml" ,".hlp":"application/winhlp" ,".hqx":"application/mac-binhex40" ,".hta":"application/hta" ,".htc":"text/x-component" ,".htm":"text/html" ,".html":"text/html" ,".hts":"text/html" ,".htt":"text/webviewhtml" ,".ice":"x-conference/x-cooltalk" ,".ico":"image/x-icon" ,".ief":"image/ief" ,".ifm":"image/gif" ,".ifs":"image/ifs" ,".iii":"application/x-iphone" ,".imy":"audio/melody" ,".ins":"application/x-internet-signup" ,".ips":"application/x-ipscript" ,".ipx":"application/x-ipix" ,".isp":"application/x-internet-signup" ,".it":"audio/x-mod" ,".itz":"audio/x-mod" ,".ivr":"i-world/i-vrml" ,".j2k":"image/j2k" ,".jad":"text/vnd.sun.j2me.app-descriptor" ,".jam":"application/x-jam" ,".jar":"application/java-archive" ,".java":"text/plain" ,".jfif":"image/pipeg" ,".jnlp":"application/x-java-jnlp-file" ,".jpe":"image/jpeg" ,".jpeg":"image/jpeg" ,".jpg":"image/jpeg" ,".jpz":"image/jpeg" ,".js":"application/x-javascript" ,".jwc":"application/jwc" ,".kjx":"application/x-kjx" ,".lak":"x-lml/x-lak" ,".latex":"application/x-latex" ,".lcc":"application/fastman" ,".lcl":"application/x-digitalloca" ,".lcr":"application/x-digitalloca" ,".lgh":"application/lgh" ,".lha":"application/octet-stream" ,".lml":"x-lml/x-lml" ,".lmlpack":"x-lml/x-lmlpack" ,".log":"text/plain" ,".lsf":"video/x-la-asf" ,".lsx":"video/x-la-asf" ,".lzh":"application/octet-stream" ,".m13":"application/x-msmediaview" ,".m14":"application/x-msmediaview" ,".m15":"audio/x-mod" ,".m3u":"audio/x-mpegurl" ,".m3url":"audio/x-mpegurl" ,".m4a":"audio/mp4a-latm" ,".m4b":"audio/mp4a-latm" ,".m4p":"audio/mp4a-latm" ,".m4u":"video/vnd.mpegurl" ,".m4v":"video/x-m4v" ,".ma1":"audio/ma1" ,".ma2":"audio/ma2" ,".ma3":"audio/ma3" ,".ma5":"audio/ma5" ,".man":"application/x-troff-man" ,".map":"magnus-internal/imagemap" ,".mbd":"application/mbedlet" ,".mct":"application/x-mascot" ,".mdb":"application/x-msaccess" ,".mdz":"audio/x-mod" ,".me":"application/x-troff-me" ,".mel":"text/x-vmel" ,".mht":"message/rfc822" ,".mhtml":"message/rfc822" ,".mi":"application/x-mif" ,".mid":"audio/mid" ,".midi":"audio/midi" ,".mif":"application/x-mif" ,".mil":"image/x-cals" ,".mio":"audio/x-mio" ,".mmf":"application/x-skt-lbs" ,".mng":"video/x-mng" ,".mny":"application/x-msmoney" ,".moc":"application/x-mocha" ,".mocha":"application/x-mocha" ,".mod":"audio/x-mod" ,".mof":"application/x-yumekara" ,".mol":"chemical/x-mdl-molfile" ,".mop":"chemical/x-mopac-input" ,".mov":"video/quicktime" ,".movie":"video/x-sgi-movie" ,".mp2":"video/mpeg" ,".mp3":"audio/mpeg" ,".mp4":"video/mp4" ,".mpa":"video/mpeg" ,".mpc":"application/vnd.mpohun.certificate" ,".mpe":"video/mpeg" ,".mpeg":"video/mpeg" ,".mpg":"video/mpeg" ,".mpg4":"video/mp4" ,".mpga":"audio/mpeg" ,".mpn":"application/vnd.mophun.application" ,".mpp":"application/vnd.ms-project" ,".mps":"application/x-mapserver" ,".mpv2":"video/mpeg" ,".mrl":"text/x-mrml" ,".mrm":"application/x-mrm" ,".ms":"application/x-troff-ms" ,".msg":"application/vnd.ms-outlook" ,".mts":"application/metastream" ,".mtx":"application/metastream" ,".mtz":"application/metastream" ,".mvb":"application/x-msmediaview" ,".mzv":"application/metastream" ,".nar":"application/zip" ,".nbmp":"image/nbmp" ,".nc":"application/x-netcdf" ,".ndb":"x-lml/x-ndb" ,".ndwn":"application/ndwn" ,".nif":"application/x-nif" ,".nmz":"application/x-scream" ,".nokia-op-logo":"image/vnd.nok-oplogo-color" ,".npx":"application/x-netfpx" ,".nsnd":"audio/nsnd" ,".nva":"application/x-neva1" ,".nws":"message/rfc822" ,".oda":"application/oda" ,".ogg":"audio/ogg" ,".oom":"application/x-AtlasMate-Plugin" ,".p10":"application/pkcs10" ,".p12":"application/x-pkcs12" ,".p7b":"application/x-pkcs7-certificates" ,".p7c":"application/x-pkcs7-mime" ,".p7m":"application/x-pkcs7-mime" ,".p7r":"application/x-pkcs7-certreqresp" ,".p7s":"application/x-pkcs7-signature" ,".pac":"audio/x-pac" ,".pae":"audio/x-epac" ,".pan":"application/x-pan" ,".pbm":"image/x-portable-bitmap" ,".pcx":"image/x-pcx" ,".pda":"image/x-pda" ,".pdb":"chemical/x-pdb" ,".pdf":"application/pdf" ,".pfr":"application/font-tdpfr" ,".pfx":"application/x-pkcs12" ,".pgm":"image/x-portable-graymap" ,".pict":"image/x-pict" ,".pko":"application/ynd.ms-pkipko" ,".pm":"application/x-perl" ,".pma":"application/x-perfmon" ,".pmc":"application/x-perfmon" ,".pmd":"application/x-pmd" ,".pml":"application/x-perfmon" ,".pmr":"application/x-perfmon" ,".pmw":"application/x-perfmon" ,".png":"image/png" ,".pnm":"image/x-portable-anymap" ,".pnz":"image/png" ,".pot,":"application/vnd.ms-powerpoint" ,".ppm":"image/x-portable-pixmap" ,".pps":"application/vnd.ms-powerpoint" ,".ppt":"application/vnd.ms-powerpoint" ,".pptx":"application/vnd.openxmlformats-officedocument.presentationml.presentation" ,".pqf":"application/x-cprplayer" ,".pqi":"application/cprplayer" ,".prc":"application/x-prc" ,".prf":"application/pics-rules" ,".prop":"text/plain" ,".proxy":"application/x-ns-proxy-autoconfig" ,".ps":"application/postscript" ,".ptlk":"application/listenup" ,".pub":"application/x-mspublisher" ,".pvx":"video/x-pv-pvx" ,".qcp":"audio/vnd.qcelp" ,".qt":"video/quicktime" ,".qti":"image/x-quicktime" ,".qtif":"image/x-quicktime" ,".r3t":"text/vnd.rn-realtext3d" ,".ra":"audio/x-pn-realaudio" ,".ram":"audio/x-pn-realaudio" ,".rar":"application/octet-stream" ,".ras":"image/x-cmu-raster" ,".rc":"text/plain" ,".rdf":"application/rdf+xml" ,".rf":"image/vnd.rn-realflash" ,".rgb":"image/x-rgb" ,".rlf":"application/x-richlink" ,".rm":"audio/x-pn-realaudio" ,".rmf":"audio/x-rmf" ,".rmi":"audio/mid" ,".rmm":"audio/x-pn-realaudio" ,".rmvb":"audio/x-pn-realaudio" ,".rnx":"application/vnd.rn-realplayer" ,".roff":"application/x-troff" ,".rp":"image/vnd.rn-realpix" ,".rpm":"audio/x-pn-realaudio-plugin" ,".rt":"text/vnd.rn-realtext" ,".rte":"x-lml/x-gps" ,".rtf":"application/rtf" ,".rtg":"application/metastream" ,".rtx":"text/richtext" ,".rv":"video/vnd.rn-realvideo" ,".rwc":"application/x-rogerwilco" ,".s3m":"audio/x-mod" ,".s3z":"audio/x-mod" ,".sca":"application/x-supercard" ,".scd":"application/x-msschedule" ,".sct":"text/scriptlet" ,".sdf":"application/e-score" ,".sea":"application/x-stuffit" ,".setpay":"application/set-payment-initiation" ,".setreg":"application/set-registration-initiation" ,".sgm":"text/x-sgml" ,".sgml":"text/x-sgml" ,".sh":"application/x-sh" ,".shar":"application/x-shar" ,".shtml":"magnus-internal/parsed-html" ,".shw":"application/presentations" ,".si6":"image/si6" ,".si7":"image/vnd.stiwap.sis" ,".si9":"image/vnd.lgtwap.sis" ,".sis":"application/vnd.symbian.install" ,".sit":"application/x-stuffit" ,".skd":"application/x-Koan" ,".skm":"application/x-Koan" ,".skp":"application/x-Koan" ,".skt":"application/x-Koan" ,".slc":"application/x-salsa" ,".smd":"audio/x-smd" ,".smi":"application/smil" ,".smil":"application/smil" ,".smp":"application/studiom" ,".smz":"audio/x-smd" ,".snd":"audio/basic" ,".spc":"application/x-pkcs7-certificates" ,".spl":"application/futuresplash" ,".spr":"application/x-sprite" ,".sprite":"application/x-sprite" ,".sdp":"application/sdp" ,".spt":"application/x-spt" ,".src":"application/x-wais-source" ,".sst":"application/vnd.ms-pkicertstore" ,".stk":"application/hyperstudio" ,".stl":"application/vnd.ms-pkistl" ,".stm":"text/html" ,".svg":"image/svg+xml" ,".sv4cpio":"application/x-sv4cpio" ,".sv4crc":"application/x-sv4crc" ,".svf":"image/vnd" ,".svg":"image/svg+xml" ,".svh":"image/svh" ,".svr":"x-world/x-svr" ,".swf":"application/x-shockwave-flash" ,".swfl":"application/x-shockwave-flash" ,".t":"application/x-troff" ,".tad":"application/octet-stream" ,".talk":"text/x-speech" ,".tar":"application/x-tar" ,".taz":"application/x-tar" ,".tbp":"application/x-timbuktu" ,".tbt":"application/x-timbuktu" ,".tcl":"application/x-tcl" ,".tex":"application/x-tex" ,".texi":"application/x-texinfo" ,".texinfo":"application/x-texinfo" ,".tgz":"application/x-compressed" ,".thm":"application/vnd.eri.thm" ,".tif":"image/tiff" ,".tiff":"image/tiff" ,".tki":"application/x-tkined" ,".tkined":"application/x-tkined" ,".toc":"application/toc" ,".toy":"image/toy" ,".tr":"application/x-troff" ,".trk":"x-lml/x-gps" ,".trm":"application/x-msterminal" ,".tsi":"audio/tsplayer" ,".tsp":"application/dsptype" ,".tsv":"text/tab-separated-values" ,".ttf":"application/octet-stream" ,".ttz":"application/t-time" ,".txt":"text/plain" ,".uls":"text/iuls" ,".ult":"audio/x-mod" ,".ustar":"application/x-ustar" ,".uu":"application/x-uuencode" ,".uue":"application/x-uuencode" ,".vcd":"application/x-cdlink" ,".vcf":"text/x-vcard" ,".vdo":"video/vdo" ,".vib":"audio/vib" ,".viv":"video/vivo" ,".vivo":"video/vivo" ,".vmd":"application/vocaltec-media-desc" ,".vmf":"application/vocaltec-media-file" ,".vmi":"application/x-dreamcast-vms-info" ,".vms":"application/x-dreamcast-vms" ,".vox":"audio/voxware" ,".vqe":"audio/x-twinvq-plugin" ,".vqf":"audio/x-twinvq" ,".vql":"audio/x-twinvq" ,".vre":"x-world/x-vream" ,".vrml":"x-world/x-vrml" ,".vrt":"x-world/x-vrt" ,".vrw":"x-world/x-vream" ,".vts":"workbook/formulaone" ,".wav":"audio/x-wav" ,".wax":"audio/x-ms-wax" ,".wbmp":"image/vnd.wap.wbmp" ,".wcm":"application/vnd.ms-works" ,".wdb":"application/vnd.ms-works" ,".web":"application/vnd.xara" ,".wi":"image/wavelet" ,".wis":"application/x-InstallShield" ,".wks":"application/vnd.ms-works" ,".wm":"video/x-ms-wm" ,".wma":"audio/x-ms-wma" ,".wmd":"application/x-ms-wmd" ,".wmf":"application/x-msmetafile" ,".wml":"text/vnd.wap.wml" ,".wmlc":"application/vnd.wap.wmlc" ,".wmls":"text/vnd.wap.wmlscript" ,".wmlsc":"application/vnd.wap.wmlscriptc" ,".wmlscript":"text/vnd.wap.wmlscript" ,".wmv":"audio/x-ms-wmv" ,".wmx":"video/x-ms-wmx" ,".wmz":"application/x-ms-wmz" ,".wpng":"image/x-up-wpng" ,".wps":"application/vnd.ms-works" ,".wpt":"x-lml/x-gps" ,".wri":"application/x-mswrite" ,".wrl":"x-world/x-vrml" ,".wrz":"x-world/x-vrml" ,".ws":"text/vnd.wap.wmlscript" ,".wsc":"application/vnd.wap.wmlscriptc" ,".wv":"video/wavelet" ,".wvx":"video/x-ms-wvx" ,".wxl":"application/x-wxl" ,".x-gzip":"application/x-gzip" ,".xaf":"x-world/x-vrml" ,".xar":"application/vnd.xara" ,".xbm":"image/x-xbitmap" ,".xdm":"application/x-xdma" ,".xdma":"application/x-xdma" ,".xdw":"application/vnd.fujixerox.docuworks" ,".xht":"application/xhtml+xml" ,".xhtm":"application/xhtml+xml" ,".xhtml":"application/xhtml+xml" ,".xla":"application/vnd.ms-excel" ,".xlc":"application/vnd.ms-excel" ,".xll":"application/x-excel" ,".xlm":"application/vnd.ms-excel" ,".xls":"application/vnd.ms-excel" ,".xlsx":"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" ,".xlt":"application/vnd.ms-excel" ,".xlw":"application/vnd.ms-excel" ,".xm":"audio/x-mod" ,".xml":"text/plain",".xml":"application/xml",".xmz":"audio/x-mod" ,".xof":"x-world/x-vrml" ,".xpi":"application/x-xpinstall" ,".xpm":"image/x-xpixmap" ,".xsit":"text/xml" ,".xsl":"text/xml" ,".xul":"text/xul" ,".xwd":"image/x-xwindowdump" ,".xyz":"chemical/x-pdb" ,".yz1":"application/x-yz1" ,".z":"application/x-compress" ,".zac":"application/x-zaurus-zac" ,".zip":"application/zip" ,".json":"application/json"
}

1. 定义静态web服务方法initStatic()
   
2. 在app方法中调用initStatic（）
   
3. 设置静态资源目录
   
4. 然后就能够加载到css等静态资源
   

routes.js :

const url = require('url')
const path = require('path')
const fs = require('fs')// 扩展res
function changeRes(res) {res.send = (data) => {res.writeHead(200, { 'Content-Type': 'text/html;charset="utf-8"' });res.end(data);}
}// 根据后缀名获取文件类型
let getFileMime = function (extname) {// 把异步读取文件方法改为同步读取文件方法let data = fs.readFileSync('./data/mime.json');let mimeObj = JSON.parse(data.toString())console.log(mimeObj[extname])return mimeObj[extname]
}// 静态web服务的方法
function initStatic (req, res, staticPath){// 1. 获取地址console.log(req.url)let pathname = url.parse(req.url).pathname// 默认加载index.htmlif (pathname == '/') {pathname = '/index.html'} else {pathname = pathname}// 获取路径中的后缀名let extname = path.extname(pathname)// 2.通过fs模块读取文件try {// 把异步读取文件方法改为同步读取文件方法let data = fs.readFileSync('./' + staticPath + pathname);if (data) {let mine = getFileMime(extname)res.writeHead(200, { 'Content-Type': '' + mine + ';charset="utf-8"' });res.end(data);}} catch (error) {}
}let server = () => {let G = {_get: {}, // 把get 和 post分开保存_post: {},staticPath: "static"  // 设置默认的静态资源web目录}let app = function (req, res) {// 扩展res的方法changeRes(res)// 配置静态web服务器initStatic(req, res, G.staticPath)// 路由let pathname = url.parse(req.url).pathname;// http://127.0.0.1:3000/login  pathname = /login// 获取请求类型let method = req.method.toLowerCase()if (G['_' + method][pathname]) {if (method == "get") {G['_' + method][pathname](req, res); // 表示执行方法} else {// post  获取post的数据  把它绑定到req.body上let postData = '';req.on('data', (chunk) => {postData += chunk;})req.on('end', () => {console.log(postData)req.body = postDataG._post[pathname](req, res); // 表示执行方法})}} else {res.writeHead(404, { 'Content-Type': 'text/html;charset="utf-8"' });res.end('页面不存在');}}app.get = function (string, callback) {// 注册方法G._get[string] = callback/* G['/login'] = function(req, res) {res.send('hello world')}*/// console.log('get方法')}app.post = function (string, callback) {// 注册方法G._post[string] = callback}// 配置静态web服务目录app.static = function (staticPath){G.staticPath = staticPath}return app;}
module.exports = server()

app.js :

const http = require("http");
const ejs = require('ejs');
const app = require('./module/routes');// 注册web服务
http.createServer(app).listen(3000);console.log('Server running at http://127.0.0.1:3000/');// 修改默认静态web目录
app.static("public");// 配置路由
app.get('/', function (req, res) {res.send('首页');
})// 配置路由
app.get('/login', function (req, res) {ejs.renderFile('./views/form.ejs', {}, (err, data) => {res.send(data)})
})app.post('/doLogin', function (req, res) {res.send('执行登录操作' + req.body);
})

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