首先下載express模塊，命令行輸入

npm install express

1.node.js中express模塊創(chuàng)建服務(wù)端

在js代碼同文件位置新建一個(gè)文件夾(www_root)，里面存放網(wǎng)頁(yè)文件等，就可以在瀏覽器中訪問(wèn)了

var express = require("express");var path = require("path");var app = express();//目錄  (當(dāng)前目錄下的www_root目錄)app.use(express.static(path.join(process.cwd(),"www_root")));//監(jiān)聽(tīng)var server = app.listen(6080);app.get('/', function (req, res) {  //發(fā)送數(shù)據(jù)  res.send('Hello World ~~~~~~~~~~~~!'); });// get, 處理響應(yīng)app.get("/login", function (request, respones) { console.log("/login comming");  // 服務(wù)器收到請(qǐng)求后，獲取客戶端get操作參數(shù) console.log(request.query); // 服務(wù)器回信息給客戶端 respones.send("已連接上服務(wù)器~~");});app.post("/upload", function(request, respones) { console.log("/upload comming"); // 獲得url上傳來(lái)的參數(shù) console.log(request.query); // 獲得用戶給我們發(fā)送過(guò)來(lái)的數(shù)據(jù) // 監(jiān)聽(tīng)我們的data來(lái)獲得 request.on("data", function(data) { console.log(data.toString()); respones.send("UPLOAD OK");  });});

2.http模塊客戶端發(fā)請(qǐng)求

(實(shí)例1)http_get測(cè)試

var http = require("http");/*callback(is_success, data/erro)*/function http_get(ip, port, url, params, callback){  //創(chuàng)建一個(gè)http.ClientRequest對(duì)象  var options = {    host : ip,    port : port,    path : url+"?"+params,    method : "GET",  };  var request = http.request(options,function(incoming_msg){    console.log("get respones");  });  //發(fā)送這個(gè)請(qǐng)求  request.end();}http_get("127.0.0.1", 6080, "/login", "uname=jadeshu&upw=123456", function(is_ok,data){});

(實(shí)例2)http_get、http_post測(cè)試

var http = require("http");/* [100] = "Continue", [101] = "Switching Protocols", [200] = "OK", [201] = "Created", [202] = "Accepted", [203] = "Non-Authoritative Information", [204] = "No Content", [205] = "Reset Content", [206] = "Partial Content", [300] = "Multiple Choices", [301] = "Moved Permanently", [302] = "Found", [303] = "See Other", [304] = "Not Modified", [305] = "Use Proxy", [307] = "Temporary Redirect", [400] = "Bad Request", [401] = "Unauthorized", [402] = "Payment Required", [403] = "Forbidden", [404] = "Not Found", [405] = "Method Not Allowed", [406] = "Not Acceptable", [407] = "Proxy Authentication Required", [408] = "Request Time-out", [409] = "Conflict", [410] = "Gone", [411] = "Length Required", [412] = "Precondition Failed", [413] = "Request Entity Too Large", [414] = "Request-URI Too Large", [415] = "Unsupported Media Type", [416] = "Requested range not satisfiable", [417] = "Expectation Failed", [500] = "Internal Server Error", [501] = "Not Implemented", [502] = "Bad Gateway", [503] = "Service Unavailable", [504] = "Gateway Time-out", [505] = "HTTP Version not supported",}*//*callback(is_success, data/erro)*/// get請(qǐng)求的參數(shù)，是帶在URL的地址上面的function http_get(ip, port, url, params, callback) { // step1,創(chuàng)建一個(gè) http.ClientRequest var options = { host: "127.0.0.1", port: port, path: url + "?" + params, method: "GET" }; // 當(dāng)有請(qǐng)求返回的時(shí)候，參數(shù)就會(huì)被傳遞為http.IncomingMessage var req = http.request(options, function(incoming_msg) { console.log("respones status " + incoming_msg.statusCode); // 監(jiān)聽(tīng)I(yíng)ncomingMessage的data事件，當(dāng)收到服務(wù)器發(fā)過(guò)來(lái)的數(shù)據(jù)的時(shí)候，觸發(fā)這個(gè)事件 incoming_msg.on("data", function(data) {  if (incoming_msg.statusCode === 200) {  callback(true, data);  } }); }); // 把這個(gè)請(qǐng)求發(fā)送出去 req.end();}/*http_get("127.0.0.1", 6080, "/login", "uname=blake&upwd=123456", function(is_ok, data) { if (is_ok) { console.log(data.toString()); }});*/// post可以帶body數(shù)據(jù)傳到服務(wù)器function http_post(ip, port, url, params, body, callback) { // step1,創(chuàng)建一個(gè) http.ClientRequest var options = { host: "127.0.0.1", port: port, path: url + "?" + params, method: "POST", headers: {  "Content-Type": "application/x-www-form-urlencoded",  "Content-Length": body.length } }; var req = http.request(options, function(incoming_msg) { console.log("respones status " + incoming_msg.statusCode); // 監(jiān)聽(tīng)I(yíng)ncomingMessage的data事件，當(dāng)收到服務(wù)器發(fā)過(guò)來(lái)的數(shù)據(jù)的時(shí)候，觸發(fā)這個(gè)事件 incoming_msg.on("data", function(data) {  if (incoming_msg.statusCode === 200) {  callback(true, data);  } }); }); // step2 寫入body數(shù)據(jù) req.write(body); // 發(fā)送請(qǐng)求 req.end();}http_post("127.0.0.1", 6080, "/upload", "filename=my_file.txt", "Hello Htpp Post", function(is_ok, data) { if (is_ok) { console.log("upload_success", data.toString());  }});