<![CDATA[刘新修]]> http://liuxinxiu.com:80/index.php zh-cn http://liuxinxiu.com:80/CORS_Node_Proxy/ <![CDATA[NodeJS反向代理至后端数据接口]]> 刘新修 <admin@yourname.com> Wed, 21 Sep 2016 04:36:38 +0000 http://liuxinxiu.com:80/CORS_Node_Proxy/ 支持来自任何域名的Post请求，验证请求参数必须有: [name、gender] 否则直接JSON返回错误！

JavaScript代码
  1. var http=require('http');  
  2. function server(){  
  3.     this.exec=function(route,req,res){  
  4.     var _self=this;  
  5.     /********** 获取客户端数组中的部分数据可向后多取 **********/  
  6.     this.arrv=function(o,n,p){  
  7.        var i,y,d,p;y=false;d='';  
  8.        for(i in o){  
  9.          if(o[i]==n&&p==undefined){i++;return o[i]};  
  10.          if(o[i]==n&&p!=undefined&&!isNaN(p)||y){  
  11.              var s;s=i;  
  12.              p=Number(p);  
  13.              if(p>0){  
  14.                 p--;s++;d+=o[s];y=true;  
  15.              }  
  16.              else{  
  17.                 return d;  
  18.              }  
  19.          }  
  20.        }  
  21.     };  
  22.     /********** 请求后端时可获取单个header头内地信息 **********/  
  23.     this.getReqHeaders=function(n){  
  24.         if(typeof(n)=='undefined'){  
  25.           console.log('getReqHeaders(n)变量没有定义!');  
  26.         }else{  
  27.             return _self.arrv(req.rawHeaders,String(n));  
  28.         }  
  29.     };  
  30.     /******** 获取客户端请求的header整体头部信息 ********/  
  31.     this.rawHeaders=function(state){  
  32.         var json={};  
  33.         if(!state){  
  34.             for(var i=0;i<req.rawHeaders.length;i++){  
  35.                 var s,s=i;  
  36.                 if(i%2==0){  
  37.                     s++;json[req.rawHeaders[i]]=req.rawHeaders[s];  
  38.                 }  
  39.             }  
  40.         }  
  41.         if(state){  
  42.             for(var i=0;i<req.rawHeaders.length;i++){  
  43.                 json[i]=req.rawHeaders[i];  
  44.             }  
  45.         }  
  46.         var jsonStr=JSON.stringify(json);//结果："{'1':'a','2':'b','3':'c'}"  
  47.         var jsonObj=JSON.parse(jsonStr); //结果：[object Object]  
  48.         return jsonObj;  
  49.     };  
  50.   
  51.   
  52.     //接收参数 ------ sreq.on("data",function(data){});接收html中ajax传递的参数  
  53.     req.on("data",function(data){  
  54.   
  55.         /********* 打印提示||接受数据并反向代理到后端 *********/  
  56.         console.log("\n--->>\nReq.on('data')",req.method.toUpperCase()+" Use Proxy!");  
  57.   
  58.         /********* 使用代理||这里Post请求体是回调data *********/  
  59.         send(route,req,res,data);  
  60.     });  
  61.   
  62.     /********** 判断是GET请求类型||也可以代理给后端处理 **********/  
  63.     if(req.method.toUpperCase()=="GET"){  
  64.   
  65.         var params=[];  
  66.         //params=url.parse(request.url,true).query;  
  67.         //params['fruit']=compute(params);  
  68.         res.writeHeader(200,{  
  69.             "Content-type":"text/html; charset=utf-8"  
  70.         });  
  71.         res.write('<h1>It is forbidden for the URL request!</h1>');  
  72.         res.write('<hr><address>NodeJs/'+process.version);  
  73.         res.write(' at '+req.headers.host.split(':')[0]);  
  74.         res.write(' Port '+req.headers.host.split(':')[1]+'</address>');  
  75.         res.end();  
  76.   
  77.     }  
  78.     /********* 如有req.on("data",function(data){});就跳过了以下方法 ******/  
  79.     /********* 判断是POST请求类型||提交不走代理此方法是本机处理回调 **********/  
  80.     else if(req.method.toUpperCase()=='POSTo'){  
  81.   
  82.         var postData="";  
  83.         /********** 读取Post提交的数据 **********/  
  84.         req.addListener("data",function(data){  
  85.             postData+=data;  
  86.         });  
  87.   
  88.         /********** 数据读取完毕就会执行的监听 *********/  
  89.         req.addListener("end",function(){  
  90.            /********* 定义Post请求主体 *********/  
  91.            var query=require('querystring').parse(postData);  
  92.   
  93.            /************** 判断如果有POST过来数据 *************/  
  94.            if(query.name&&query.gender){  
  95.               console.log('Start a request...');  
  96.   
  97.                 var origin=_self.arrv(req.rawHeaders,'Origin');  
  98.                 console.log("origin:"+typeof req.rawHeaders+'---')  
  99.   
  100.   
  101.               /********** 代理转发至php,跨域全放开让后端去匹配验证 **********/  
  102.               //res.setHeader('Access-Control-Allow-Origin','*');  
  103.               //res.setHeader('Access-Control-Allow-Headers','X-Requested-With');  
  104.               //res.setHeader('Access-Control-Allow-Methods','GET,POST,PUT,DELETE,OPTIONS');  
  105.               //send(route,req,res,query);  
  106.            }  
  107.            /****** 判断结束 ******/  
  108.         });  
  109.   
  110.     }  
  111.   
  112.   
  113.     /******** 请求后端接口 ********/  
  114.     function send(route,req,res,data){  
  115.   
  116.         /***************************************
  117.         var data={
  118.               name:'liuxinxiu',
  119.               gender:"male",
  120.               time:new Date().getTime()
  121.         };
  122.         ****************************************/  
  123.         //data=require('querystring').stringify(data);  
  124.         var rawHeaders=_self.rawHeaders();  
  125.   
  126.         /********** 判断一个对象是哪中类型的对象 **********/  
  127.         function isArray(obj){  
  128.               return Object.prototype.toString.call(obj)==='[object Array]';  
  129.         };  
  130.   
  131.         /********* 打印Request Headers **********/  
  132.         console.log("\n--->>\nRequest Headers:",req.rawHeaders);  
  133.   
  134.         /***** 向后端发送请求基本的设置 *****/  
  135.         var options={  
  136.               port: 80,  
  137.               host:"code.liuxinxiu.com",  
  138.               path:'/php/Post/CORS_PHP.php',  
  139.               method: 'POST',  
  140.               headers:{  
  141.                   'Content-Type':_self.getReqHeaders('Content-Type'),  
  142.                   'Content-Length':data.length,  
  143.                   'Origin':_self.getReqHeaders('Origin'),  
  144.                   'User-Agent':_self.getReqHeaders('User-Agent')  
  145.               }  
  146.         };  
  147.   
  148.         /***** 如果header整体替换就会乱码 *****/  
  149.         //options.headers=_self.rawHeaders();  
  150.   
  151.   
  152.         var request=http.request(options,function(result){  
  153.               console.log("\n--->>\nstatusCode:",result.statusCode);  
  154.               console.log("\n--->>\nResponse Headers:",result.headers);  
  155.   
  156.               if(result){  
  157.                  var content_type,origin,x_powered_by,server;  
  158.                      //content_type=origin=x_powered_by=server=undefined;  
  159.                      content_type=result.headers['content-type'];  
  160.                      origin=result.headers['access-control-allow-origin'];  
  161.                      x_powered_by=result.headers['x-powered-by'];  
  162.                      server=result.headers['server'];  
  163.   
  164.                      /********** 判断分别加入包含服务器错误页 **********/  
  165.                      if(origin!=undefined&&result.statusCode==200){  
  166.                         res.setHeader('Access-Control-Allow-Origin',origin);  
  167.                      }  
  168.                      if(content_type!=undefined){  
  169.                         res.setHeader('Content-Type',content_type);  
  170.                      }  
  171.                      if(x_powered_by!=undefined){  
  172.                         res.setHeader('X-Powered-By',x_powered_by);  
  173.                      }  
  174.                      if(server!=undefined){  
  175.                         res.setHeader('Server',server);  
  176.                      }  
  177.   
  178.               }  
  179.               /********** 有异常的请求需要问题定位 **********/  
  180.               if(result.statusCode<200||result.statusCode>206){  
  181.               }  
  182.   
  183.               /********** 接受数据数据监听 **********/  
  184.               var _data='';  
  185.               result.on('data',function(chunk){  
  186.                 _data+=chunk;  
  187.               });  
  188.   
  189.               /********** 结束接受数据监听 *********/  
  190.               result.on('end',function(){  
  191.                    console.log("\n--->>\nresult:",_data);  
  192.                    res.write(_data);  
  193.                    res.end();  
  194.               });  
  195.   
  196.         /******** request逻辑完成 ********/  
  197.         });  
  198.   
  199.   
  200.         request.on('error',function(e) {  
  201.               console.log('problem with request: ' + e.message);  
  202.         });  
  203.   
  204.         //request.write(data);  
  205.         request.write(data+"\n");  
  206.         request.end();  
  207.   
  208.     }  
  209.   
  210.   
  211.   
  212.   /****** 内部结束 ******/  
  213.   }  
  214. }  
  215. module.exports=new server();  

NodeJS数据接口(Post请求直接代理至后端PHP): http://liuxinxiu.com:3000/CORS_Node_Proxy/

PHP数据接口(验证跨域提交白名单外返回错误):  http://code.liuxinxiu.com/php/Post/CORS_PHP.php


Tags - , , ]]> http://liuxinxiu.com:80/CORS_Node_Proxy/#blogcomment <![CDATA[[评论] NodeJS反向代理至后端数据接口]]> <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 http://liuxinxiu.com:80/CORS_Node_Proxy/#blogcomment