var http = require('http');
var express = require('express');
var app = express(); //实例化
var key = 'OxLYdFmu3YS1haMUcaBmGMBK0P7PbOqb'; //百度api的key
var bodyParser = require('body-parser');
// 创建 application/x-www-form-urlencoded 编码解析
// var urlencodedParser = bodyParser.urlencoded({ extended: false })
app.use(bodyParser.json()); //json编码
//设置跨域访问
app.all('*', function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "X-Requested-With,Content-Type");
res.header("Access-Control-Allow-Methods","PUT,POST,GET,DELETE");
res.header("X-Powered-By",' 3.2.1')
res.header("Content-Type", "application/json;charset=utf-8");
next();
});
//post请求,url/map
app.post('/map',function(req,res){
var ipArr = req.body;
var result = Array();
for (var i = 0; i < ipArr.length; i++) {
var tree = '';
var options = { 
hostname: 'api.map.baidu.com', 
port: 80, 
path: '/location/ip?ak=' + key + "&coor=bd09ll&ip=" + ipArr[i], 
method: 'GET' 
}; 
// 向远程服务器端发送请求
var getLocation = http.request(options, function(response){
response.on('data', function(data) {
tree += data;
result.push(tree); 
//避免缓存
tree = ''; 
}); 
}); 
getLocation.end(); 
}
//延后发送请求响应
setTimeout(function(){
res.status(200).send(result);
}, 500);
})
//监听8081接口打印请求域名和端口
var server = app.listen(8081, function () {
var host = server.address().address
var port = server.address().port
console.log("应用实例，访问地址为 http://%s:%s", host, port)
})