insurance-spider/service/huahai.js

//华海保险
import axios from "axios";
import fs from "fs";
import path from "path";
import { timestampToDate, loopCall, keywordsInclude } from "../utils.js";
import config from "../config.js";
import { SQLiteMessageQueue } from "../sqlite.js";
import * as cheerio from "cheerio";

class HUAHAI {
  constructor() {
    this.jsonMap = [
      {
        name: "华海保险",
        info: [],
        options: {
          name: "华海保险",
          url: "https://www.cnoic.com/zbgg/",
          homeIndex: "index.jhtml",
        },
      },
    ];
    console.log("华海保险 爬虫启动...");
    this.queue = new SQLiteMessageQueue();
    this.start();
  }

  async start() {
    try {
      await this.init();
    } catch (err) {
      console.error("启动失败:", err);
    }
  }
  async init() {
    for (let item of this.jsonMap) {
      let announcements = this.queue.getAnnouncementsBySpider(item.name);
      if (announcements.length > 0) {
        this.loopFetchIncrement(item);
      } else {
        this.loopFetchFull(item);
      }
    }
  }
  // 全量爬取
  loopFetchFull(props) {
    try {
      loopCall(this.getInfo.bind(this), {
        time: config.fullFetchTime,
        pagenumber: 1,
        additional: props.options,
        stopWhen: (pagenumber, result) => {
          return (
            pagenumber >= result.pages || pagenumber >= config.pageNumberLimit
          );
        },
        readyForNext: (pagenumber, result) => {
          props.info.push(...result.info);
          return pagenumber + 1;
        },
        complete: (result) => {
          props.info.push(...result.info);
          console.log(`爬取完成，共获取 ${props.info.length} 条有效数据`);
          try {
            if (props.info.length > 0) {
              this.queue.saveAnnouncements(props.name, props.info);
              // this.writeFile(props);
              this.queue.addMessage(props.name, props.info);
            }
          } catch (error) {
            console.error("数据库操作失败:", error);
          }
          this.loopFetchIncrement(props);
        },
      });
    } catch (error) {
      console.error(`${props.options.name}全量爬取失败:`, error);
    }
  }
  loopFetchIncrement(props) {
    try {
      loopCall(this.getInfo.bind(this), {
        time: config.incrementFetchTime, // 5分钟间隔
        pagenumber: 1,
        additional: props.options,
        readyForNext: (pagenumber, result) => {
          try {
            let newInfo = this.queue.filterNewAnnouncements(
              props.name,
              result.info
            );
            // 存在新数据
            if (newInfo.length > 0) {
              console.log(`发现 ${newInfo.length} 条新数据`);
              // props.info.push(...newInfo);
              this.queue.saveAnnouncements(props.name, newInfo);
              // this.writeFile(props);
              this.queue.addMessage(props.name, newInfo);
              // 全是新数据，继续下一页
              if (newInfo.length === result.info.length) {
                return pagenumber + 1;
              } else {
                // 有部分重复数据，重新从第一页开始
                return 1;
              }
            } else {
              console.log("没有发现新数据，继续监控...");
              return 1; // 重新从第一页开始
            }
          } catch (error) {
            console.error("数据库操作失败:", error);
          }
        },
      });
    } catch (error) {
      console.error(`${props.options.name}增量爬取失败:`, error);
    }
  }
  async getInfo(pagenumber = 1, config) {
    let info = [];
    console.log(`${config.name}--获取第 ${pagenumber} 页数据...`);
    let result = await this.getList(pagenumber, config);
    if (result[0]) {
      // 出错, 记录错误日志
      console.error("获取页面数据失败:", result[0].status);
      return { pages: 0, info: [] };
    } else {
      // 列表没有结束时间字段，默认5页
      let pages = 5;
      let html = result[1];
      const $ = cheerio.load(html);
      $(".callbids-list li").each((index, element) => {
        let id = $(element).find("a").attr("href");
        let name = $(element).find("h6").text();
        let publishTime = $(element).find("callbids-time").text();
        let endTime = null;
        let urls = $(element).find("a").attr("href");
        if (
        //   endTime &&
        //   +new Date(endTime) >= Date.now() &&
          keywordsInclude(name)
        ) {
          console.log("处理项目:", id, name);
          info.push({
            id: id,
            name: name,
            publishTime: publishTime,
            endTime: endTime,
            urls: urls,
          });
        }
      });
      return { pages, info };
    }
  }
  // 分页获取数据
  getList(pagenumber, config) {
    let url = config.url;
    if (pagenumber === 1) {
      url += config.homeIndex;
    } else {
      url += `index_${pagenumber}.jhtml`;
    }
    return axios({
      url: url,
      method: "get",
    })
      .then((res) => {
        let result = res.data;
        return [null, result];
      })
      .catch((err) => {
        return [err, null];
      });
  }
}

new HUAHAI();