Node.js里面的内置模块和自定义模块的实现

let str={};
module.exports=str;

let str={};
exports.A=str;

// node里面的内置模块和自定义模块
// 模块导出两个方案
let str={};
module.exports=str;
exports.A=str;

// 引入模块得使用require("")加载模块
let todo=require("./todo");//可以省略后缀
console.log(todo);

module.exports={
   name:"张三",
   sleep:function(){
       console.log("睡觉");
   }
}

module.exports={
   name:"张三",
   sleep:function(){
       console.log("睡觉");
   }
}

// 引入模块得使用require("")加载模块
let todo=require("./todo");//可以省略后缀
console.log(todo);

// node里面的require()加载模块的时候可以直接写名称，但是必须放在依赖下加载，并且还要生成配置文件
// 终端进入依赖文件，安装配置文件
let fetch=require("Fetch");
console.log(fetch);
fetch.get("http://www.zjm.com");

module.exports={
   get(url){
       console.log(url);
   }
}

let Axios = require("Axios");
let url = "https://autumnfish.cn/search";
let data = { keywords: '西安' };
const http = require("http");
let app = http.createServer((req, res) => {
   res.writeHead(200, { "Content-Type": "text/html;charset=utf-8" });
   Axios.get(url, { params: data }).then((result) => {
       res.write(result);
       res.end();
   });
});
app.listen(8080)

const http = require("http");
const https=require("https");
//转化方法
let change = (args) => {
   let str = "?";
   for (let key in args) {
       str += key + "=" + args[key];
       str += "&";
   }
   return str.slice(0, str.length - 1);
}
module.exports = {
   get(href, { params }) {
       return new Promise((resolve, reject) => {
           href += change(params);
           https.get(href, (res) => {
               let { statusCode } = res;
               let error;
               if (statusCode != 200) {
                   error = new Error('Request Failed.\n' +
                       `Status Code: ${statusCode}`);
               }
               if (error) {
                   console.error(error.message);
                   // Consume response data to free up memory
                   res.resume();
                   return;
               }
               //设置响应编码
               res.setEncoding("utf8");
               let alldata = "";
               //监听数据
               res.on("data", (info) => {
                   alldata += info;
               })
               res.on("end", () => {
                   let data =alldata;
                   resolve(data);
               })
           });
       });
   },
   post() {

   }
}