项目初始化

+node_modules/

+灰度接口代理
+--------------
+
+灰度接口服务：
+
+1. service.api.yohobuy.com
+2. api.open.yohobuy.com
+
+配置：
+
+```json
+{
+    apis:[
+    {
+        route:"/service.api.yohobuy.com",//老服务接口域名
+        methods:['get','post']
+
+    },
+    {
+        route:"/api.open.yohobuy.com",//老服务接口域名
+        methods:['get','post']
+    }
+   ],
+   whiteList:[
+    {
+      api:'/guang/api/v1/article/getArticleNotice', //替换老接口
+      map:'http://api.douban.com/v2/book/search' //替换新接口
+    },
+    {
+      api:'app.Shopping.count',//替换老接口
+      map:'http://127.0.0.1:3000/test' //替换新接口
+    }]
+}
+
+```
+
+启动：
+
+```
+npm install 
+npm start
+```

+module.exports = {
+    apis:[
+    {
+        route:"/service.api.yohobuy.com",
+        methods:['get','post'],
+
+    },
+    {
+        route:"/api.open.yohobuy.com",
+        methods:['get','post']
+    }
+   ],
+   whiteList:[
+    {
+      api:'/guang/api/v1/article/getArticleNotice',
+      map:'http://api.douban.com/v2/book/search'
+    },
+    {
+      api:'app.Shopping.count',
+      map:'http://127.0.0.1:3000/test'
+    }]
+}

+var http = require('http'),
+    conf = require("./conf");
+var request = require('request');
+var express = require('express');
+var app = express();
+var bodyParser = require('body-parser'); //body序列化插件
+
+app.use(bodyParser.urlencoded({extended: false}));
+
+var SERVICE_URL = "/service.api.yohobuy.com";//新服务的URL
+
+app.get('/test',function(req,res,next){
+    res.send('hi~~~');
+});
+
+/**
+ * 路由生成
+ */
+function route() {
+ 
+  for(var i=0;i<conf.apis.length;i++) {
+
+   var api = conf.apis[i];
+
+   for(var j=0;j<api.methods.length;j++){
+
+       if(api.route === SERVICE_URL) {
+          api.route += '/*';
+       }
+       console.log('method: ['+api.methods[j]+'] route:'+api.route);
+
+       app[api.methods[j]](api.route, function(req, res, next) {
+            var form = req.body?req.body:{};
+            var url = whiteProc('http:/'+req.url,form,req.query);
+            
+            console.log('call method:'+req.method+' url:'+url);
+            procRes(req.method,url,req.body,res);
+       });
+   }
+  }
+}
+
+/**
+ * 白名单处理
+ * @param  {[type]} url  [description]
+ * @param  {[type]} form [description]
+ * @param  {[query]} query [description]
+ * @return {[type]}      [description]
+ */
+function whiteProc(url,form,query) {
+
+    var list = conf.whiteList;
+    var method = query.method?query.method:form['method'];
+    method = method?method:'';
+
+    for(var i=0;i<list.length;i++) {
+        if(url.indexOf(list[i].api)>-1||method === list[i].api) {
+
+           console.log('match api:'+list[i].api+' map:'+ list[i].map);
+           return list[i].map;
+        }
+    }
+    console.log('no match url:'+url);
+    return url;
+}
+
+/**
+ * 处理代理参数
+ * @param  {string} method  方法
+ * @param  {string} url  代理地址
+ * @param  {Object} form 表单数据
+ * @param  {Object} res  响应信息
+ * @return {void} 
+ */
+function procRes(method,url,form, ress) {
+    if(method === "GET") {
+       request(url,callback);
+    } else {
+       request.post({url:url, form: form},callback);
+    }
+
+    function callback(err,res,body){
+      if (!err && res.statusCode == 200) {
+        ress.send(body); 
+      }
+      else {
+        if(res) {
+          console.log('errorCode:'+res.statusCode);
+        }
+        console.log(err);
+        ress.send(body);
+      }
+    } 
+}
+
+console.log('app start!');
+route();
+app.listen(3000);

+{
+  "name": "grayapi",
+  "version": "1.0.0",
+  "description": "api proxy",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "body-parser": "^1.14.1",
+    "express": "^4.13.3",
+    "request": "^2.67.0"
+  }
+}