Nodejs創建自己的server后，我們如果需要從客戶端利用ajax調用別的服務器端的數據API的接口，這時候出現了ajax跨域問題。?
一種是利用在客戶端解決跨域問題?
這種方案大家可以去網上查查?
另一種方案是在服務器端去請求別的服務器，然后將數據再返回客戶端.這里就涉及到了：?
ajax請求，expressjs接收請求，Nodejs發送REST請求。?
我著重寫寫關于這個方案的解決方法：?
首先利用express創建路由，接收客戶端發送的不同請求。?
express路由可以接收get請求和post請求。?
get請求可以去看API，因為平時我們可能對JSON的處理較多，所以用到POST請求較多，我這里主要寫寫post請求。?
客戶端發送請求：?
客戶端代碼:?
Java代碼?
?
$.ajax({???????????type:?'POST',???????????contentType:?'application/json',???????????url:?'/internaltool/project/peoples',???????????data:?null,???????????async:?false,???????????dataType:?'json',???????????success:function?(data){???????????????result?=?data;???????????},???????????error:?function?()?{???????????????alert("Save?error!");???????????}???????});???????????????$.ajax({???????????????type:?'POST',???????????????contentType:?'application/json',???????????????url:??'/internaltool/project/peopleInfoById',???????????????data:?'{"id":?"811435467"}',???????????????async:?false,???????????????dataType:?'json',???????????????success:function?(data){???????????????},???????????????error:?function?()?{???????????????????alert("Save?error!");???????????????}???????????});??
Nodejs接收客戶端發送的請求，并且Nodejs服務器端發送REST請求別的服務器端取得數據。?
Nodejs服務器端的代碼：?
Java代碼?
?
var?express?=?require('express'),??????sr??????=?require('./static_require'),??????app?????=?express.createServer();?????????//?linql?2012/08/13?Add???????app.configure(function(){??????????app.use(express.methodOverride());??????????app.use(express.bodyParser());??????????app.use(app.router);??????});??????//?End??var?http?=?require('http');?????exports.init?=?function(here)?{??????app.get('/*.js',?sr.getHandler({??????????searchPaths:?[here]??????}));?????????app.get('/*',?function(req,?res)?{??????????res.sendfile(req.param(0))??????});?????????//?linql?2012/08/13?Add??????//?這種情況是普通請求，不帶有json數據處理??????app.post('/internaltool/project/peoples',?function(req,?res)?{??????????//?the?post?options??????????var?optionspost?=?{??????????????host?:?'192.168.1.1',??????????????port?:?'8080',??????????????path?:?'/managesystem/Project/personList',??????????????method?:?'POST'??????????};?????????????//?do?the?POST?call??????????//?服務器端發送REST請求??????????var?reqPost?=?http.request(optionspost,?function(resPost)?{??????????????resPost.on('data',?function(d)?{??????????????????res.send(d);??????????????});??????????});?????????????reqPost.end();?????????????reqPost.on('error',?function(e)?{??????????????console.error(e);??????????});??????});?????????app.post('/internaltool/project/peopleInfoById',?function(req,?res)?{??????????//?Request?of?JSON?data??????????//?接收客戶端的JSON數據??????????var?reqJosnData?=?JSON.stringify(req.body);?????????????//?do?a?POST?request??????????//?prepare?the?header??????????var?postheaders?=?{??????????????'Content-Type'?:?'application/json;?charset=UTF-8',??????????????'Content-Length'?:?Buffer.byteLength(reqJosnData,?'utf8')??????????};?????????????//?the?post?options??????????var?optionspost?=?{??????????????host?:?'192.168.1.1',??????????????port?:?'8080',??????????????path?:?'/managesystem/Project/personMessageById',??????????????method?:?'POST',??????????????headers?:?postheaders??????????};?????????????//?do?the?POST?call??????????var?reqPost?=?http.request(optionspost,?function(resPost)?{?????????????????resPost.on('data',?function(d)?{??????????????????res.send(d);??????????????});??????????});?????????????//?write?the?json?data??????????//?發送REST請求時傳入JSON數據??????????reqPost.write(reqJosnData);??????????reqPost.end();??????????reqPost.on('error',?function(e)?{??????????????console.error(e);??????????});??????});??????//?End??};??
關于expres.js可以參照：?
http://www.csser.com/board/4f77e6f996ca600f78000936?
Nodejs發送REST請求可以參照：?
http://isolasoftware.it/2012/05/28/call-rest-api-with-node-js/?
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