node.js中express模块创建服务器和http模块客户端发请求
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2022-05-27 13:24:49
首先下载express模块,命令行输入
npm install express
1.node.js中express模块创建服务端
在js代码同文件位置新建一个...
首先下载express模块,命令行输入
npm install express
1.node.js中express模块创建服务端
在js代码同文件位置新建一个文件夹(www_root),里面存放网页文件等,就可以在浏览器中访问了
var express = require("express"); var path = require("path"); var app = express(); //目录 (当前目录下的www_root目录) app.use(express.static(path.join(process.cwd(),"www_root"))); //监听 var server = app.listen(6080); app.get('/', function (req, res) { //发送数据 res.send('hello world ~~~~~~~~~~~~!'); }); // get, 处理响应 app.get("/login", function (request, respones) { console.log("/login comming"); // 服务器收到请求后,获取客户端get操作参数 console.log(request.query); // 服务器回信息给客户端 respones.send("已连接上服务器~~"); }); app.post("/upload", function(request, respones) { console.log("/upload comming"); // 获得url上传来的参数 console.log(request.query); // 获得用户给我们发送过来的数据 // 监听我们的data来获得 request.on("data", function(data) { console.log(data.tostring()); respones.send("upload ok"); }); });
2.http模块客户端发请求
(实例1)http_get测试
var http = require("http"); /* callback(is_success, data/erro) */ function http_get(ip, port, url, params, callback){ //创建一个http.clientrequest对象 var options = { host : ip, port : port, path : url+"?"+params, method : "get", }; var request = http.request(options,function(incoming_msg){ console.log("get respones"); }); //发送这个请求 request.end(); } http_get("127.0.0.1", 6080, "/login", "uname=jadeshu&upw=123456", function(is_ok,data){ });
(实例2)http_get、http_post测试
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请求的参数,是带在url的地址上面的 function http_get(ip, port, url, params, callback) { // step1,创建一个 http.clientrequest var options = { host: "127.0.0.1", port: port, path: url + "?" + params, method: "get" }; // 当有请求返回的时候,参数就会被传递为http.incomingmessage var req = http.request(options, function(incoming_msg) { console.log("respones status " + incoming_msg.statuscode); // 监听incomingmessage的data事件,当收到服务器发过来的数据的时候,触发这个事件 incoming_msg.on("data", function(data) { if (incoming_msg.statuscode === 200) { callback(true, data); } }); }); // 把这个请求发送出去 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可以带body数据传到服务器 function http_post(ip, port, url, params, body, callback) { // step1,创建一个 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); // 监听incomingmessage的data事件,当收到服务器发过来的数据的时候,触发这个事件 incoming_msg.on("data", function(data) { if (incoming_msg.statuscode === 200) { callback(true, data); } }); }); // step2 写入body数据 req.write(body); // 发送请求 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()); } });
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