175 lines
6.7 KiB
JavaScript
175 lines
6.7 KiB
JavaScript
import axios from './axios.js';
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import * as cheerio from 'cheerio';
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import fs from 'fs/promises';
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import path from 'path';
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const BASE_URL = 'http://120.236.48.169:89/HPMS/';
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const START_URL = BASE_URL + 'presellCertList.aspx';
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// Extracts table data from a given HTML content
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function extractDataFromHtml($) {
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const data = [];
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// Corrected selector to find rows with table data, skipping the header
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const rows = $('.resultlist table tr:has(td)');
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rows.each((i, row) => {
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const columns = $(row).find('td');
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// Based on debug.html, the structure is different and has 9 columns
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if (columns.length >= 9) {
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const licenseCell = $(columns[1]); // 许可证号 is the 2nd column
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const licenseLinkTag = licenseCell.find('a');
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const rowData = {
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'序号': $(columns[0]).text().trim(),
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'许可证号': licenseLinkTag.text().trim(),
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'开发企业': $(columns[2]).text().trim(),
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'项目名称': $(columns[3]).text().trim(),
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'项目地址': $(columns[4]).text().trim(),
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'批准时间': $(columns[5]).text().trim(),
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'所在区域': $(columns[6]).text().trim(),
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'总套数': $(columns[7]).text().trim(),
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'可售套数': $(columns[8]).text().trim(),
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'许可证链接': '', // Initialize
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};
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// The link is inside an onclick attribute, not a standard href
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const onclickAttr = licenseLinkTag.attr('onclick');
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if (onclickAttr) {
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// Make regex flexible to handle single or double quotes
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const match = onclickAttr.match(/open_click\(['"]([^'"]+)['"]\)/);
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if (match && match[1]) {
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// match[1] will be like '/HPMS/PresellDetailsInfo.aspx?id=1012110'
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// We need to resolve it against the origin, not the full BASE_URL path
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const origin = new URL(BASE_URL).origin;
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rowData['许可证链接'] = new URL(match[1], origin).href;
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}
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}
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data.push(rowData);
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}
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});
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return data;
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}
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/**
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* Scrapes all data from the target website, handling pagination.
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* @returns {Promise<Array<Object>>} - An array of all scraped data records.
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*/
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async function scrapeWebsite() {
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let allData = [];
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console.log('开始抓取第一页数据...');
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let response = await axios.get(START_URL);
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let $ = cheerio.load(response.data);
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allData = extractDataFromHtml($);
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console.log(`第一页抓取完成，获得 ${allData.length} 条数据。`);
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const pageCountSpan = $('#PageNavigator1_LblPageCount');
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const totalPages = pageCountSpan.length ? parseInt(pageCountSpan.text(), 10) : 1;
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console.log(`共发现 ${totalPages} 页。`);
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const formValues = {};
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$('input[name^="txt"], select').each((idx, el) => {
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const name = $(el).attr('name');
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if (name) {
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formValues[name] = $(el).val() || '';
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}
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});
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for (let i = 2; i <= totalPages; i++) {
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console.log(`正在抓取第 ${i} 页...`);
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const viewState = $('#__VIEWSTATE').val();
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const viewStateGenerator = $('#__VIEWSTATEGENERATOR').val();
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const eventValidation = $('#__EVENTVALIDATION').val();
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if (!viewState) {
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console.log('无法找到 __VIEWSTATE，终止抓取。');
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break;
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}
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const postData = new URLSearchParams();
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postData.append('__EVENTTARGET', 'PageNavigator1$LnkBtnNext');
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postData.append('__EVENTARGUMENT', '');
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postData.append('__VIEWSTATE', viewState);
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postData.append('__VIEWSTATEGENERATOR', viewStateGenerator);
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if(eventValidation) {
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postData.append('__EVENTVALIDATION', eventValidation);
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}
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for (const name in formValues) {
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postData.append(name, formValues[name]);
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}
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postData.append('PageNavigator1$txtNewPageIndex', (i - 1).toString());
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response = await axios.post(START_URL, postData, {
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headers: {
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'Content-Type': 'application/x-www-form-urlencoded',
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'Referer': START_URL,
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}
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});
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$ = cheerio.load(response.data);
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const nextPageData = extractDataFromHtml($);
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console.log(`第 ${i} 页抓取完成，获得 ${nextPageData.length} 条数据。`);
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if (nextPageData.length === 0) {
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console.log(`第 ${i} 页没有数据，抓取结束。`);
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break;
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}
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allData = allData.concat(nextPageData);
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}
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console.log(`\n抓取全站数据完毕！共 ${allData.length} 条原始记录。`);
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return allData;
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}
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/**
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* Performs post-processing on the scraped data:
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* 1. Filters out records where "许可证号" is "空".
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* 2. Re-indexes "序号" sequentially.
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* 3. Converts "总套数" and "可售套数" fields to numbers.
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* @param {Array<Object>} allData - The raw scraped data.
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* @returns {Promise<Array<Object>>} - The processed data.
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*/
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async function processScrapedData(allData) {
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// 1. Filter out records where "许可证号" is "空"
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let processedData = allData.filter(record => record['许可证号'] !== '空');
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console.log(`删除 "许可证号" 为 "空" 的记录后，剩余 ${processedData.length} 条记录。`);
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// 2. Re-index "序号" sequentially
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for (let i = 0; i < processedData.length; i++) {
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processedData[i]['序号'] = (i + 1).toString();
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}
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console.log('序号字段已重新编号。');
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// 3. Convert "总套数" and "可售套数" to numbers
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for (const record of processedData) {
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record['总套数'] = parseInt(record['总套数'], 10) || 0;
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record['可售套数'] = parseInt(record['可售套数'], 10) || 0;
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}
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console.log('"总套数" 和 "可售套数" 字段已转换为数字。');
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return processedData;
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}
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// 主函数 - 导出以便在根目录调用
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export async function main() {
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try {
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const allData = await scrapeWebsite();
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const processedData = await processScrapedData(allData);
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const dataPath = path.join(path.dirname(new URL(import.meta.url).pathname), '..', 'data', 'preSaleLicense.json');
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await fs.writeFile(dataPath, JSON.stringify(processedData, null, 4), 'utf-8');
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console.log(`更新后的数据已保存至 data/preSaleLicense.json 文件。`);
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console.log('\n所有数据处理和文件生成任务已完成。');
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} catch (error) {
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console.error('抓取或处理过程中发生错误:', error.message);
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if (error.response) {
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console.error('Status:', error.response.status);
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}
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}
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}
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