var _ = require('lodash');var request = require("request");/*    @LM 2017-02-16    node端代理浏览器路由 解决浏览器跨域问题    demo:    router.post('/proxy_http',proxy_routes);    condition = {        url:'',//接口地址 (必填)        method:''//接口方式 (看接口需求)        host:'',//        form:{} post请求参数    }*/exports.proxy_routes = function(req, res, next) {    /*处理get或者post请求的req参数*/    var condition = _.assign(req.body || {}, req.query || {});    if(!condition.url){        return next({status:101,message:'not defind url'})    }    if(condition.host){        req.headers.host = condition.host;    }    var opts = {        url: condition.url,        method: condition.method||'GET',        // headers: req.headers,        form:condition.form||{}    };    var ts = Date.now();    console.log('proxy_routes', opts, ts, "请求开始--");    request(opts,function(err, response, body) {        if(err){            console.log('proxy_routes', opts, ts, "请求异常--err:" + err, (Date.now() - ts) + 'ms');            return next(err);        }                console.log('proxy_routes', opts, ts, "请求正常--response.statusCode:" + response.statusCode, (Date.now() - ts) + 'ms');        try{            res.json(JSON.parse(body));        }catch(e){            res.json(body);        }    });    };