jd_price.js

const version = "0.0.0.2";
const path1 = "serverConfig";
const path2 = "wareBusiness";
const path3 = "basicConfig";
const url = $request.url;
const body = $response.body;
let now = 0;
const $ = new Env("京东比价");

Array.prototype.insert = function (index, item) {
  this.splice(index, 0, item);
};

if (url.indexOf(path1) !== -1) {
  let obj = JSON.parse(body);
  delete obj.serverConfig.httpdns;
  delete obj.serverConfig.dnsvip;
  delete obj.serverConfig.dnsvip_v6;
  $.done({body: JSON.stringify(obj)});
}

if (url.indexOf(path3) !== -1) {
  let obj = JSON.parse(body);
  let JDHttpToolKit = obj.data.JDHttpToolKit;
  if (JDHttpToolKit) {
    delete obj.data.JDHttpToolKit.httpdns;
    delete obj.data.JDHttpToolKit.dnsvipV6;
  }
  $.done({body: JSON.stringify(obj)});
}

if (url.indexOf(path2) !== -1) {
  if (Math.ceil(Math.random() * 4) === 1) {
    $.get({url: "https://raw.githubusercontent.com/JDHelloWorld/jd_price/main/version.log", timeout:3000}, (err, resp, data) => {
      if(!err){
        try{
          let latest = data.split('\n')[0]
          let msg = data.split('\n')[1]
          if (version !== latest) {
            $.msg('请更新！', `最新：${latest}  JDHelloWorld`, `更新内容：${msg}`)
            $.done({body});
            return false
          } else {
            showHistory()
          }
        }catch(e){
          $.logErr(e, resp)
        }finally{}
      }
    })
  } else {
    showHistory()
  }
}

function showHistory() {
  let obj = JSON.parse(body);
  const floors = obj.floors;
  const commodity_info = floors[floors.length - 1];
  const shareUrl = commodity_info.data.property.shareUrl;
  // 当前价格
  if (commodity_info.data.otherUseBannerInfo)
    now = parseInt(commodity_info.data.otherUseBannerInfo.bannerPrice.replace('¥', ''));
  else
    now = parseInt(commodity_info.data.priceInfo.jprice)
  request_history_price(shareUrl, data => {
    if (data) {
      const lowerword = adword_obj();
      lowerword.data.ad.textColor = "#fe0000";
      let bestIndex = 0;
      for (let index = 0; index < floors.length; index++) {
        const element = floors[index];
        if (element.mId === lowerword.mId) {
          bestIndex = index + 1;
          break;
        } else {
          if (element.sortId > lowerword.sortId) {
            bestIndex = index;
            break;
          }
        }
      }

      // 成功
      if (data.ok === 1) {
        lowerword.data.ad.adword = data.text;
        floors.insert(bestIndex, lowerword);
      }

      // 失败
      if (data.ok === 0) {
        lowerword.data.ad.adword = "⚠️ " + "失败！";
        floors.insert(bestIndex, lowerword);
      }
      $.done({body: JSON.stringify(obj)});
    } else {
      $.done({body});
    }
  })
}

function request_history_price(share_url, callback) {
  let id = share_url.match(/product\/(.*)\./)[1];
  const option = {
    url: `https://browser.bijiago.com/extension/price_towards?dp_ids=undefined&dp_id=${id}-3&ver=1&format=jsonp&union=union_bijiago&version=1594190525099&from_device=bijiago&from_type=bjg_ser&crc64=1&_=${new Date().getTime()}`,
    headers: {
      'Connection': 'keep-alive',
      'sec-ch-ua': '" Not A;Brand";v="99", "Chromium";v="90", "Google Chrome";v="90"',
      'sec-ch-ua-mobile': '?0',
      'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36',
      'Accept': '*/*',
      'Sec-Fetch-Site': 'cross-site',
      'Sec-Fetch-Mode': 'no-cors',
      'Sec-Fetch-Dest': 'script',
      'Referer': 'https://item.jd.com/',
      'Accept-Language': 'zh-CN,zh;q=0.9'
    },
    timeout: 3000
  };
  $.get(option, (err, resp, data) => {
    if (err) {
      console.log(err);
      $.msg("ERROR", '出错', err);
      callback(null, null);
    }

    data = JSON.parse(data)
    let Jun18 = 0, Nov11 = 0;
    let price30 = {price: 99999999, text: ""};
    let promo = data['promo'];
    let store = data['store'][1]

    let history = {
      max: Math.round(store['highest']),
      maxt: time(store['max_stamp'] * 1000),
      min: Math.round(store['lowest']),
      mint: time(parseInt(store['min_stamp']) * 1000)
    }

    for (let j of promo) {
      let stamp = j['time'] * 1000;
      let day = time(stamp).split(' ')[0];
      let price = Math.round(j['price'] / 100);
      day === '2021-06-18' ? Jun18 = price : ""
      day === '2020-11-11' ? Nov11 = price : ""
      if (dayDiff(day) < 31 && price <= price30.price) {
        price30.price = price;
        price30.text = day;
      }
    }
    // 去除99999999
    if (history.min === 99999999) history.min = '-';
    if (Jun18 === 0) Jun18 = '-'
    if (Nov11 === 0) Nov11 = '-'
    let arr = []
    arr.push({name: '当前价', price: now, date: '', diff: ''})
    arr.push({name: '最高价', price: history.max, date: history.maxt, diff: priceDiff(history.max)})
    arr.push({name: '最低价', price: history.min, date: history.mint, diff: priceDiff(history.min)})
    arr.push({name: '六一八', price: Jun18, date: "2021-06-18", diff: priceDiff(Jun18)})
    arr.push({name: '双十一', price: Nov11, date: "2020-11-11", diff: priceDiff(Nov11)})
    arr.push({name: '三十天', price: price30.price, date: price30.text, diff: priceDiff(price30.price)})
    let s = ''
    arr.forEach(item => {
      if (item.price === '-' || item.price === 0)
        s += `${item.name}${space('', 7)}-\n`
      else
        s += `${item.name}${space('', 6)}${item.price}${space(item.price, 8)}${item.date}${space(item.date, 14)}${item.diff}\n`;
    })
    callback({ok: 1, text: s});
  })
}

function adword_obj() {
  return {
    "bId": "eCustom_flo_199",
    "cf": {
      "bgc": "#ffffff",
      "spl": "empty"
    },
    "data": {
      "ad": {
        "adword": "",
        "textColor": "#8C8C8C",
        "color": "#f23030",
        "text-align": "justify",
        "word-break": "break-all",
        "newALContent": true,
        "hasFold": true,
        "class": "com.jd.app.server.warecoresoa.domain.AdWordInfo.AdWordInfo",
        "adLinkContent": "",
        "adLink": ""
      }
    },
    "mId": "bpAdword",
    "refId": "eAdword_0000000028",
    "sortId": 13
  }
}

function time(time = +new Date()) {
  let date = new Date(time + 8 * 3600 * 1000);
  return date.toJSON().substr(0, 19).replace('T', ' ').split(' ')[0].replace(/\./g, '-');
}

function dayDiff(date) {
  return parseInt((new Date() - new Date(date)) / (1000 * 60 * 60 * 24) + '')
}

function priceDiff(old) {
  if (typeof old !== 'number')
    return '-'
  let diff = old - now;
  if (diff === 0)
    return '-'
  return diff > 0 ? `↓${Math.round(diff)}` : `↑${Math.round(Math.abs(diff))}`;
}

function space(str, len) {
  let blank = "";
  for (let i = 0; i < len - (str + '').length; i++) {
    blank += " ";
  }
  return blank;
}

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