起一个服务，转发请求高德地图瓦片图层(NodeJS)

var http=require('http');

var url=require('url');

var util=require('util');

var qs=require('querystring');

http.createServer(function(req,res){

res.writeHeader(200,{'Content-Type':'image/png;charset=UTF-8'});

var params=url.parse(req.url,true).query;

var mapUrl=`http://webrd0${params.s}.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=8&x=${params.x}&y=${params.y}&z=${params.z}`;

http.get(mapUrl,function(reqest,response){

var chunks = [];

reqest.on('data',function(chunk){

chunks.push(chunk);

});

reqest.on('end',function(){

var body = Buffer.concat(chunks);

res.write(body);

res.end();

})

});

}).listen(3000);