node.js使用免费的阿里云ip查询获取ip所在地【推荐】

 //这里是测试文件test.js
 const http = require('http'),
  express = require('express'),
  app = express();
 app.use('/',function (req,res) {//访问localhost所有的请求都会进入这里
  res.send('服务器启动');
 });
 http.createServer(app).listen(80,'0.0.0.0');//创建服务器实例
{
 "name": "test",
 "version": "1.0.0",
 "dependencies": {
  "express": "latest"
 }
}
//package.json

let option = {
  hostname:"dm-81.data.aliyun.com",//上图的接口域名
  path:`/rest/160601/ip/getIpInfo.json"Content-Type":"application/json; charset=utf-8",
   "Authorization": "APPCODE 这里是你阿里云中那个appcode",
  }
 };

https.request使用方法与http.request 一致详情请见官网文档（http://nodejs.cn/api/http.html#http_http_request_options_callback）

let re = https.request(option,(Res)=>{//为了与外层的res区别故此处响应文件用Res
  Res.setEncoding('utf8');
  if(Res.statusCode===200){//若http状态码为200则请求成功
   Res.on('data', (data) => {
    res.send(data);//将接口返回的数据返回到页面上
   });
  }
 });
 re.on('error', (e) => {
  console.error(`请求遇到问题: ${e.message}`);
 });
 re.end();

//这里是测试文件
const http = require('http'),
 https = require('https'),
 express = require('express'),
 app = express();
app.use('/',function (req,res) {//访问localhost所有的请求都会进入这里
 let ip = req.headers['x-forwarded-for'] ||
  req.connection.remoteAddress ||
  req.socket.remoteAddress ||
  req.connection.socket.remoteAddress;
 let option = {
  hostname:"dm-81.data.aliyun.com",//上图的接口域名
  path:`/rest/160601/ip/getIpInfo.json"Content-Type":"application/json; charset=utf-8",
   "Authorization": "APPCODE 你的appcode",
  }
 };
 let re = https.request(option,(Res)=>{//为了与外层的res区别故此处响应文件用Res
  Res.setEncoding('utf8');
  if(Res.statusCode===200){//若http状态码为200则请求成功
   Res.on('data', (data) => {
    res.send(data);//将接口返回的数据返回到页面上
   });
  }
 });
 re.on('error', (e) => {
  console.error(`请求遇到问题: ${e.message}`);
 });
 re.end();
});
http.createServer(app).listen(80,'0.0.0.0');//创建服务器实例