const express = require('express');
const request = require('request')
const app = express()
const cheerio = require('cheerio')

var IPURL = "http://200019.ip138.com/";
var BaseUrl = {
  url: 'http://v.juhe.cn/weather/index',
  appkey: '434c32f4a4f0d235196d7797752f6b61'
}

app.all("*",function(req,res,next){
  res.header('Access-Control-Allow-Origin', '*');
  next();
})

app.get('/getWeather', function(req, res) {
  var cityName = req.query.cityname;
  var url = `${BaseUrl.url}?key=${BaseUrl.appkey}&cityname=${encodeURI(cityName)}&format=2`;
  request(url,function(error, response, body) {
    res.json(JSON.parse(body))
  })
})

app.get('/ip', function(req, res) {
  request(IPURL,function(error, response, body) {
    
    const $ = cheerio.load(body)
    var ipaddress = $('body>p').text();
    res.json({
      resultcode: "200",
      result: {
        city: ipaddress.substring(ipaddress.indexOf("市")-3,(ipaddress.indexOf("市")-3)+3)
      }
    })
  })
})

app.listen(9090, function() {
  console.log('Example app listening on port 3000!')
})