index.js

const AnyProxy = require('anyproxy');
const https = require('https');
const zlib = require('zlib');
const cheerio = require('cheerio');

let reqOptions = {
  hostname: 'www.baidu.com',
     method: 'GET',
     headers: 
      { 
        Connection: 'keep-alive',
        'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.119 Safari/537.36',
        'Accept-Encoding': 'gzip, deflate, br',
        Cookie: 'BAIDUID=430A649DF24452418447946FF5607105:FG=1; BIDUPSID=430A649DF24452418447946FF5607105; PSTM=1507474679; BDUSS=5DMjN0dGxwYS01R2ZhUndIR2l2VDZXT2pwYmNQZFllQTcweWM1NW53VWx5Z0ZhTUFBQUFBJCQAAAAAAAAAAAEAAACFfi0hTWFyc19UYQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACU92lklPdpZTm; BD_UPN=123253; BDORZ=B490B5EBF6F3CD402E515D22BCDA1598; NOJS=1; H_PS_PSSID=1462_13550_21118_20927; BD_CK_SAM=1; PSINO=6; BD_HOME=1; BDRCVFR[feWj1Vr5u3D]=mk3SLVN4HKm; BDRCVFR[M7pOaqtZgJR]=I67x6TjHwwYf0; sug=3; sugstore=0; ORIGIN=0; bdime=0; H_PS_645EC=31dcWJ0JJpfCkzmdNu%2Bfmh179RM5u4TPjxNwURQUbN1xsHNV2UKeNfDiz3A'
      },
};
/**
* {Object} reqOptions - 基础请求配置
* {String} quiz       - 题干
*/
function sendReq(reqOptions,quiz){
  const path = `/s?wd=${encodeURI(quiz)}`
  reqOptions = {...reqOptions,path}
  return new Promise(resolve=>{
    callback = (res) => {
      let bufferList=[];
      res.on('data',(d)=>{
          bufferList.push(d)
      });
      res.on('end',()=>{
        let buffer = Buffer.concat(bufferList);
        zlib.gunzip(buffer, (err, decoded)=> {
          resolve(decoded.toString());
        })
      });
    }
    let req = https.request(reqOptions,callback);
    req.end();
  })
}
//anyproxy 规则
const rule ={
  summary: 'my customized rule for AnyProxy',
  *beforeSendRequest(requestDetail) {},
  *beforeSendResponse(requestDetail, responseDetail) {
    if(requestDetail.url.indexOf('https://question-zh.hortor.net/question/bat/find')==0){
      let body = JSON.parse(responseDetail.response.body.toString())
      let options = body.data.options
      let content = yield sendReq(reqOptions,body.data.quiz)
      const $ = cheerio.load(content, { decodeEntities: false });
      const resList = $('.result');
      options.forEach((answer,i) => {
        let time = 0;
        resList.each((index, result)=>{
          if($(result).text().indexOf(answer)>=0){
            time++
          }
        })
        options[i] = `${answer}[${time}]`
      });
      body.data.options = options
      body=new Buffer(JSON.stringify(body))
      responseDetail.response.body = body
      return responseDetail;
    }
  },
  // 是否处理https请求
  *beforeDealHttpsRequest(requestDetail) {
    return true
   },
  // 请求出错的事件
  *onError(requestDetail, error) { /* ... */ },
  // https连接服务器出错
  *onConnectError(requestDetail, error) { /* ... */ }
};
//anyproxy 配置
const options = {
  port: 8001,
  rule,
  webInterface: {
    enable: true,
    webPort: 8002,
    wsPort: 8003,
  },
  throttle: 10000,
  silent: true
};
const proxyServer = new AnyProxy.ProxyServer(options);

proxyServer.on('ready', () => { /* */ });
proxyServer.on('error', (e) => { /* */ });
proxyServer.start();