const url = require('url');

const http = require('http');

const fs = require('fs');

const { Console } = require('console');

let hostname = '127.0.0.1';

let port = 8080;

var curURL = ''

// 读取文件，处理编码问题

function readText (pathname) {

  let bin = fs.readFileSync(pathname)

  if (bin[0] === 0xEF && bin[1] === 0xBB && bin[2] === 0xBF) {

    bin = bin.slice(3)

  }

  return bin.toString('utf-8')

}

// 获取当前的时间

function getCurrentDate () {

  let date = new Date();

  let year = date.getFullYear();

  let month = date.getMonth()+1;

  let day = date.getDate();

  let hour = date.getHours();

  let minute = date.getMinutes();

  let second = date.getSeconds();

  let curDate = year + '年' + month + '月' + day + '日 ' + hour + ':' + minute + ':' + second;

  return curDate

}

// 创建 HTTP 隧道代理

const server = http.createServer((req, res) => {

  var pathname = url.parse(req.url).pathname;

    // 过滤掉favicon的请求，不然log里面会有这个url

    if(pathname !== '/favicon.ico'){

      curURL = `http://${hostname}:${port}${req.url}`

      res.statusCode = 200;

      res.setHeader('Content-Type', 'application/json');

      res.writeHead(200, { 'Content-Type': 'application/json' });

      console.log(readText('./user.json'))

      res.end(readText('./user.json'))

      getLog()

    }

});

// 打印日志模块

function getLog () {

  let options =  {

    encoding: 'utf-8',

    flags: 'w'

  }

  // 判断文件是否存在

  if (fs.existsSync('./Log.log')) {

    options.flags = 'r'

  }

  const output = fs.createWriteStream('./Log.log', options);

  const errorOutput = fs.createWriteStream('./Log.log',options);

  const logger = new Console({ stdout: output, stderr: errorOutput });

  // 获取当前的时间

  let curDate = getCurrentDate ()

  let logs = `[${curDate}]=====URL路径：${curURL}\n`

  console.log(logs)

  // 将新的内容写入日志，并且不删除原来的

  fs.appendFile('./Log.log',logs,'utf8',function(err, ret) {

    if(err) {

      throw err

    }

  })

  logger.log(logs);

}

server.listen(port, hostname, () => {

  console.log(`服务运行在 http://${hostname}:${port}/`);

});