var http = require('http'); 
var qs = require('querystring'); 

//配置您申请的appKey和openId
app_key = "***";
open_id = "***";
 
function request_content(request_url,port,params,method){
  
  var path=request_url;
  if(!!params){
    var content = qs.stringify(params); 
    path=request_url+'"Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8";
  }

  var req = http.request(options, function (res) { 
    res.setEncoding('utf8'); 
    res.on('data', function (chunk) { 
      console.log(chunk); 
    }); 
  }); 
  
  req.on('error', function (e) { 
    console.log('problem with request: ' + e.message); 
  }); 
  
  req.end();
}

function main(){

  var domain="http://api.xiaocongjisuan.com/";
  var port=8080;//http对应80端口,https 对应443端口，请使用者自己改正
  var servlet="develop/verificationcode/get";
  var method="get";
  var request_url=domain+servlet;

  var params = {}; 
  params['appKey']=app_key;
  params['openId']=open_id;
  
  //变动部分
  params["w"]=200;
  params["h"]=50;
  params["len"]=7;
  params["fontSize"]=40;
  
  request_content(request_url,port,params,method);
}

main();

package main

import (
  "io/ioutil"
  "net/http"
  "net/url"
  "fmt"
  "strings"
)
 
//配置您申请的appKey和openId
const APP_KEY ="yours";
const OPEN_ID ="yours";

func requestContent(requestUrl string,params url.Values,method string)(rs[]byte ,err error){
  
  if strings.ToUpper(method)=="GET"{
    return get(requestUrl,params)
  }
  return post(requestUrl,params)
}

// get 网络请求
func get(requestUrl string,params url.Values)(rs[]byte ,err error){
  var Url *url.URL
  Url,err=url.Parse(requestUrl)
  if err!=nil{
    fmt.Printf("解析url错误:\r\n%v",err)
    return nil,err
  }
  //如果参数中有中文参数,这个方法会进行URLEncode
  Url.RawQuery=params.Encode()
  resp,err:=http.Get(Url.String())
  if err!=nil{
    fmt.Println("err:",err)
    return nil,err
  }
  defer resp.Body.Close()
  return ioutil.ReadAll(resp.Body)
}
 
// post 网络请求 ,params 是url.Values类型
func post(requestUrl string, params url.Values)(rs[]byte,err error){
  resp,err:=http.PostForm(requestUrl, params)
  if err!=nil{
    return nil ,err
  }
  defer resp.Body.Close()
  return ioutil.ReadAll(resp.Body)
}

func main(){

  domain :="http://api.xiaocongjisuan.com/"

  servlet :="develop/verificationcode/get"
  method :="get"
  requestUrl:=domain+servlet
  
  //初始化参数
  params:=url.Values{}
  
  params.Set("appKey",APP_KEY)
  params.Set("openId",OPEN_ID)
  
  //变动部分
  params.Set("w","200")
  params.Set("h","50")
  params.Set("len","7")
  params.Set("fontSize","40")
 
 
  //发送请求
  data,err:=requestContent(requestUrl,params,method)
  fmt.Println(string(data))
  if err!=nil{
    fmt.Printf("解析url错误:\r\n%v",err)
  }
}