first commit

历届学生/苏琪/项目练习/weather/service/app.js

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+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!')
+})