nodejs——http post

先用的needle，并不好用；
改为request
npm install request

var request = require('request');
var postData = {act:"checkVersion",mac:selfMAC};
request.post({url:'http://test/test.php', formData: postData}, function optionalCallback(err, httpResponse, body) {
    if (err) {
        return console.error('upload failed:', err);
    }
    console.log('Upload successful!',body);
    remoteUrl = remoteUrl+JSON.parse(body).updatedVersion+'/';
    console.log("remoteUrl:"+remoteUrl);
});