Node 搭建 Web 服务器

简易服务器代码：app.js

/**
1.如何通过原生NodeJS搭建Web服务器
2.如何处理Get请求, 如何处理POST请求
3.如何处理不同路径(路由)
4.如何处理(获取)请求参数
*/
// 1.导入http模块
const http = require("http");
const queryString = require("querystring");

// 2.通过http模块创建服务对象
const server = http.createServer();

/**
 * 3.通过服务对象监听用户请求
 */
server.on("request", (req, res) => {
	console.log("接收到请求");
	// 1.获取请求类型
	let method = req.method.toLowerCase();
	// 2.获取请求路径
	let url = req.url;
	let path = url.split("?")[0];
	// 3.获取请求参数
	let params = "";
	if (method === "get") {
		// 4.处理请求参数
		params = url.split("?")[1];
		params = queryString.parse(params);
		// 5.处理路由
		if (path === "/login") {
			// console.log('处理登录请求', params);
			// 1.告诉客户端返回的数据是什么类型
			res.writeHead(200, {
				// 'Content-Type': 'text/plain; charset=utf-8;' // utf-8数据类型
				"Content-Type": "application/json;", // json数据类型
			});
			// 2.告诉客户端返回的数据是什么
			// res.end('www.it666.com 知播渔');
			res.end(JSON.stringify({ name: "lnj", age: 33 }));
		} else if (path === "/register") {
			console.log("处理注册请求", params);
		}
	} else if (method === "post") {
		// 4.处理请求参数
		req.on("data", (chuck) => {
			params += chuck;
		});
		// 4.1 接收完成请求传递的参数数据
		req.on("end", () => {
			params = queryString.parse(params);
			// 5.处理路由
			if (path === "/login") {
				console.log("post处理登录请求", params);
			} else if (path === "/register") {
				console.log("post处理注册请求", params);
			}
		});
	}
});

// 4.指定监听的端口号
server.listen(3000);

Node 项目热重载运行

nodemon - 项目热重载运行库：每次修改代码后，自动重启项目
- 项目安装：npm install nodemon --save-dev
  - 项目安装启动：npx nodemon app.js
- 全局安装：npm install nodemon -g
  - 全局安装启动项目：nodemon app.js

Node 原生编写：读取静态资源服务

静态资源服务，文件：staticServer.js

const path = require("path");
const fs = require("fs");
const mime = require("./mime"); // mime文件后缀定义
/**
 * 读取静态资源
 * @param req  请求对象
 * @param res  响应对象
 * @param rootPath 静态资源所在的目录
 */
function readFile(req, res, rootPath) {
	// 1.获取静态资源地址
	// http://127.0.0.1:3000/login.html?name=lnj&pwd=123456;
	let fileName = req.url.split("?")[0];
	let filePath = path.join(rootPath, fileName);
	// 2.判断静态资源是否存在
	let isExists = fs.existsSync(filePath);
	if (!isExists) {
		return;
	}
	// 3.获取静态资源的后缀名
	let fileExt = path.extname(filePath);
	// 4.根据文件的后缀获取对应的类型
	let type = mime[fileExt];
	// 5.对文本类型进行特殊处理
	if (type.startsWith("text")) {
		type += "; charset=utf-8;";
	}
	// 6.告诉客户端返回数据的类型
	res.writeHead(200, {
		"Content-Type": type,
	});
	// 7.加载静态资源并返回静态资源
	fs.readFile(filePath, (err, content) => {
		if (err) {
			res.end("Server Error");
			return;
		}
		res.end(content);
	});
}
module.exports = {
	readFile,
};

文件后缀 json 文件：mime.json

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"
}

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app.js 中，请求先判断是否静态资源：staticServer.readFile(req, res, rootPath)，再设置其他请求响应数据处理

// 1.导入http模块
const http = require("http");
const queryString = require("querystring");
const path = require("path");

// 静态资源加载模块
const rootPath = path.join(__dirname, "www"); // www目录放置静态资源文件
const staticServer = require("./staticServer");

// 2.通过http模块创建服务对象
const server = http.createServer();
// 3.通过服务对象监听用户请求
server.on("request", (req, res) => {
	// 是否读取的是静态资源
	staticServer.readFile(req, res, rootPath);
	// 1.获取请求类型
	let method = req.method.toLowerCase();
	// 2.获取请求路径
	let url = req.url;
	let path = url.split("?")[0];
	// 3.获取请求参数
	let params = "";
	if (method === "get") {
		// 4.处理请求参数
		params = url.split("?")[1];
		params = queryString.parse(params);
		// 5.处理路由
		if (path === "/login") {
			// console.log('处理登录请求', params);
			// 1.告诉客户端返回的数据是什么类型
			res.writeHead(200, {
				// 'Content-Type': 'text/plain; charset=utf-8;'
				"Content-Type": "application/json;",
			});
			// 2.告诉客户端返回的数据是什么
			// res.end('呵呵哈哈哈');
			res.end(JSON.stringify({ name: "lnj", age: 33 }));
		} else if (path === "/register") {
			console.log("处理注册请求", params);
		}
	} else if (method === "post") {
		// 4.处理请求参数
		req.on("data", (chuck) => {
			params += chuck;
		});
		req.on("end", () => {
			params = queryString.parse(params);
			// 5.处理路由
			if (path === "/login") {
				console.log("post处理登录请求", params);
			} else if (path === "/register") {
				console.log("post处理注册请求", params);
			}
		});
	}
});
// 4.指定监听的端口号
server.listen(3000);

使用模板引擎：ejs

ejs 的 npm 文档：ejs - npm (npmjs.com)

加载 ejs 模板引擎，文件：dynamicServer.js

const ejs = require("ejs");

function renderHTML(req, res, fileName) {
	ejs.renderFile(fileName, req.data, function (err, str) {
		res.writeHead(200, {
			"Content-Type": "text/html; charset=utf-8;",
		});
		res.end(str);
	});
}
module.exports = {
	renderHTML,
};

app.js 写入

// 1.导入http模块
const http = require("http");
const queryString = require("querystring");
const dynamicServer = require("./dynamicServer");

// 2.通过http模块创建服务对象
const server = http.createServer();
// 3.通过服务对象监听用户请求
server.on("request", (req, res) => {
	// 1.获取请求类型
	let method = req.method.toLowerCase();
	// 2.获取请求路径
	let url = req.url;
	let path = url.split("?")[0];
	// 3.获取请求参数
	let params = "";
	if (method === "get") {
		// 4.处理请求参数
		params = url.split("?")[1];
		params = queryString.parse(params);
		// 5.处理路由
		if (path === "/login") {
			// console.log('处理登录请求', params);
			let data = { msg: "我是动态数据" };
			req.data = data;
			// 加载html文件
			dynamicServer.renderHTML(req, res, "./views/index.html");
		} else if (path === "/register") {
			console.log("处理注册请求", params);
		}
	} else if (method === "post") {
		// 4.处理请求参数
		req.on("data", (chuck) => {
			params += chuck;
		});
		req.on("end", () => {
			params = queryString.parse(params);
			// 5.处理路由
			if (path === "/login") {
				console.log("post处理登录请求", params);
			} else if (path === "/register") {
				console.log("post处理注册请求", params);
			}
		});
	}
});
// 4.指定监听的端口号
server.listen(3000);

使用 ejs 模板编写 html：views\index.html

html

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<title>动态网页</title>
	</head>
	<body>
		<h1>我是动态网页</h1>
		<h2><%=msg%></h2>
	</body>
</html>

Node 搭建 Web 服务器 ​

简易服务器代码：app.js ​

Node 项目热重载运行 ​

Node 原生编写：读取静态资源服务 ​

静态资源服务，文件：staticServer.js ​

文件后缀 json 文件：mime.json ​

app.js 中，请求先判断是否静态资源：staticServer.readFile(req, res, rootPath)，再设置其他请求响应数据处理 ​

使用模板引擎：ejs ​

加载 ejs 模板引擎，文件：dynamicServer.js ​

app.js 写入 ​

使用 ejs 模板编写 html：views\index.html ​