如何在CocosCreator中使用http和WebSocket
CocosCreator版本2.3.4
一、HttpGET
Get方式,客戶端請求本機(jī)地址3000端口,并攜帶參數(shù)url和name,服務(wù)端收到后返回name參數(shù)。
cocos客戶端:
//訪問地址 let url = "http://127.0.0.1:3000/?url=123&name=321"; //新建Http let xhr = new XMLHttpRequest(); //接收數(shù)據(jù) xhr.onreadystatechange = function () { if (xhr.readyState == 4 && (xhr.status >= 200 && xhr.status < 400)) { var response = xhr.responseText; console.log(response); } }; //錯誤處理 xhr.onerror = function(evt){ console.log(evt); } //初始化一個請求,GET方式,true異步請求 xhr.open("GET", url, true); //發(fā)送請求 xhr.send();
為了方便測試,在本機(jī)用nodejs搭建一個簡易服務(wù)器,在收到訪問后,返回請求參數(shù)中的name值。
nodejs服務(wù)端:
var app = require('express')(); var http = require('http').Server(app); app.get('/', function(req, res){ //設(shè)置允許跨域的域名,*代表允許任意域名跨域 res.header("Access-Control-Allow-Origin","*"); //允許的header類型 res.header("Access-Control-Allow-Headers","content-type"); //跨域允許的請求方式 res.header("Access-Control-Allow-Methods","DELETE,PUT,POST,GET,OPTIONS"); res.send(req.query.name); }); http.listen(3000, function(){ console.log('listening on *:3000'); });
運(yùn)行nodejs的服務(wù)器,并運(yùn)行cocos代碼,cocos中
console.log(response); //輸出為321
二、HTTPPOST
客戶端請求服務(wù)器,攜帶參數(shù)name,服務(wù)端收到后返回name。
cocos客戶端:
let url = "http://127.0.0.1:3000/"; let xhr = new XMLHttpRequest(); xhr.onreadystatechange = function () { if (xhr.readyState == 4 && (xhr.status >= 200 && xhr.status < 400)) { var response = xhr.responseText; console.log(response); } }; xhr.onerror = function(evt){ console.log(evt); } xhr.open("POST", url, true); xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); xhr.send("name=123");
nodejs服務(wù)端:
var app = require('express')(); var http = require('http').Server(app); var querystring = require('querystring'); app.post('/', function(req, res){ //設(shè)置允許跨域的域名,*代表允許任意域名跨域 res.header("Access-Control-Allow-Origin","*"); //允許的header類型 res.header("Access-Control-Allow-Headers","content-type"); //跨域允許的請求方式 res.header("Access-Control-Allow-Methods","DELETE,PUT,POST,GET,OPTIONS"); var body = ""; req.on('data', function (chunk) { body += chunk; //一定要使用+=,如果body=chunk,因為請求favicon.ico,body會等于{} console.log("chunk:",chunk); }); req.on('end', function () { body = querystring.parse(body); console.log("body:",body); res.send(body.name); }); }); http.listen(3000, function(){ console.log('listening on *:3000'); });
cocos輸出
console.log(response); //輸出123
三、WebSocket
cocos客戶端代碼:
連接本地服務(wù)器127.0.0.1:8001,連接成功后發(fā)送一段字符串,并將接收的字符串打印
let ws = new WebSocket("ws://127.0.0.1:8001"); ws.onopen = function (event) { console.log("Send Text WS was opened."); }; ws.onmessage = function (event) { console.log("response text msg: " + event.data); }; ws.onerror = function (event) { console.log("Send Text fired an error"); }; ws.onclose = function (event) { console.log("WebSocket instance closed."); }; setTimeout(function () { if (ws.readyState === WebSocket.OPEN) { console.log("WebSocket start send message."); ws.send("Hello WebSocket, I'm a text message."); } else { console.log("WebSocket instance wasn't ready..."); } }, 3000);
nodejs服務(wù)端:
接收字符串成功后,打印接收的數(shù)據(jù),并返回一段字符串。
var ws = require("nodejs-websocket"); console.log("開始創(chuàng)建websocket"); var server = ws.createServer(function(conn){ console.log("連接成功"); conn.on("text", function (obj) { console.log("接收:",obj); conn.send("message come from server"); }) conn.on("close", function (code, reason) { console.log("關(guān)閉連接") }); conn.on("error", function (code, reason) { console.log("異常關(guān)閉") }); }).listen(8001) console.log("開始創(chuàng)建websocket完畢");
測試結(jié)果,客戶端瀏覽器輸出:
nodejs端輸出:
四、移植Egret的http和websocket到cocos
因為cocos沒有封裝工具類,所以直接從Egret移植http和websocket到cocos中使用,還算方便。
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