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@@ -0,0 +1,226 @@
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import type { PlatformFieldConfig } from '@/types';
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/** DOM 抓取后的通用结果结构。 */
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export type DomScrapeResult = Record<string, unknown>;
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/** 默认等待时间,用于点击后或翻页后等待页面渲染。 */
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const DEFAULT_DELAY = 1500;
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/**
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* 在目标网页上下文中执行 DOM 抓取。
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*
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* 注意:该方法会通过 chrome.scripting.executeScript 注入到页面中执行,
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* 所以依赖的辅助方法都写在函数内部,避免注入后丢失模块作用域。
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*/
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export async function scrapeDomFields(fields: PlatformFieldConfig[]): Promise<DomScrapeResult | null> {
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if (!document.body) {
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return null;
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}
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return processFields(fields, document.body);
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}
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/** 睡眠工具,给点击、翻页、异步渲染留出等待时间。 */
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const sleep = (ms?: number) => new Promise((resolve) => window.setTimeout(resolve, ms ?? DEFAULT_DELAY));
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/** 从元素中提取实际值,默认取文本,也支持 attr、图片 src、链接 href。 */
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function extractValue(el: Element | null, config: PlatformFieldConfig): string | null {
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if (!el) {
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return null;
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}
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if (config.attr) {
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return (el.getAttribute(config.attr) || '').trim();
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}
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const tagName = el.tagName.toUpperCase();
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if (tagName === 'IMG') {
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return el.getAttribute('src');
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}
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if (tagName === 'A') {
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const href = el.getAttribute('href');
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return href && !href.startsWith('http') ? window.location.origin + href : href;
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}
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return (el.textContent || '').replace(/\n/g, '').trim();
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}
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/** 根据字段 condition 配置在指定 DOM 范围内自动点击目标元素。 */
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async function autoClick(config: PlatformFieldConfig, rootDom: ParentNode): Promise<void> {
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if (!config.condition) {
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return;
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}
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for (const selector of config.condition.list) {
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const targets = Array.from(rootDom.querySelectorAll<HTMLElement>(selector));
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for (const target of targets) {
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target.click();
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await sleep(config.condition.time);
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}
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}
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}
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/** 递归处理字段配置,支持普通字段、嵌套 row、列表和表格。 */
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async function processFields(columns: PlatformFieldConfig[], rootDom: ParentNode): Promise<DomScrapeResult> {
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const result: DomScrapeResult = {};
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for (const item of columns) {
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await autoClick(item, rootDom);
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const element = rootDom.querySelector(item.className);
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if (!element) {
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result[item.label] = '没找到该元素';
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continue;
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}
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if (!item.type) {
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if (item.keys && item.keys.length > 0) {
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await autoClick(item, element);
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result[item.label] = await processFields(item.keys, element);
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} else {
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await autoClick(item, element);
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result[item.label] = extractValue(element, item);
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}
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continue;
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}
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if (item.type === 1) {
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result[item.label] = await processList(item, rootDom);
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continue;
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}
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if (item.type === 2) {
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result[item.label] = await processTable(item, element);
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}
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}
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return result;
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}
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/** 按列表配置抓取所有列表项,并按分页配置继续翻页。 */
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async function processList(config: PlatformFieldConfig, rootDom: ParentNode): Promise<DomScrapeResult[]> {
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const allList: DomScrapeResult[] = [];
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let pageCount = 0;
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while (true) {
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pageCount += 1;
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const elements = Array.from(rootDom.querySelectorAll(config.className));
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for (const element of elements) {
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const itemData = await processFields(config.keys ?? [], element);
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allList.push(itemData);
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}
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if (!config.pagination) {
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console.log('未配置分页信息,抓取单页后结束。');
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break;
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}
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if (config.pagination.maxPage && pageCount >= config.pagination.maxPage) {
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console.log('已达到配置的最大页数,停止。');
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break;
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}
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const nextBtn = document.querySelector<HTMLElement>(config.pagination.nextBtn);
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if (!nextBtn) {
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console.log('未找到下一页按钮,抓取结束。');
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break;
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}
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const isDisabled = config.pagination.disabledClass
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? nextBtn.classList.contains(config.pagination.disabledClass)
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: nextBtn.hasAttribute('disabled');
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if (isDisabled) {
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console.log('下一页按钮已禁用,抓取结束。');
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break;
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}
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nextBtn.click();
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await sleep(config.pagination.delay);
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}
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return allList;
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}
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/** 按表格配置抓取表格行数据,并按分页配置继续翻页。 */
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async function processTable(config: PlatformFieldConfig, rootDom: ParentNode): Promise<DomScrapeResult[]> {
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const allTableData: DomScrapeResult[] = [];
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let pageCount = 0;
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while (true) {
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pageCount += 1;
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const partsNodes: Record<string, Element[]> = {};
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for (const part of config.tableParts ?? []) {
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const partKey = part.name ?? part.label;
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const partSelector = part.select ?? part.className;
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const rowSelector = part.rowSelector ?? `${partSelector} tr`;
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partsNodes[partKey] = Array.from(rootDom.querySelectorAll(rowSelector));
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}
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const firstPart = config.tableParts?.[0];
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const firstPartKey = firstPart ? firstPart.name ?? firstPart.label : '';
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const rowCount = partsNodes[firstPartKey]?.length || 0;
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for (let index = 0; index < rowCount; index += 1) {
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const rowData: DomScrapeResult = {};
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for (const keyItem of config.keys ?? []) {
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const partKey = keyItem.part ?? firstPartKey;
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const targetRowNode = partsNodes[partKey]?.[index];
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if (!targetRowNode) {
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continue;
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}
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if (keyItem.keys) {
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rowData[keyItem.label] = await processFields(keyItem.keys, targetRowNode);
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} else {
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rowData[keyItem.label] = extractValue(targetRowNode.querySelector(keyItem.className), keyItem);
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}
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}
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allTableData.push(rowData);
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}
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if (!config.pagination) {
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console.log('未配置分页信息,抓取单页后结束。');
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break;
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}
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if (config.pagination.maxPage && pageCount >= config.pagination.maxPage) {
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console.log('已达到配置的最大页数,停止。');
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break;
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}
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const nextBtn = document.querySelector<HTMLElement>(config.pagination.nextBtn);
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if (!nextBtn) {
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console.log('未找到下一页按钮,抓取结束。');
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break;
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}
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const isDisabled = config.pagination.disabledClass
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? nextBtn.classList.contains(config.pagination.disabledClass)
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: nextBtn.hasAttribute('disabled');
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if (isDisabled) {
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console.log('下一页按钮已禁用,抓取结束。');
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break;
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}
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nextBtn.click();
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await sleep(config.pagination.delay);
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}
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return allTableData;
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}
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@@ -1,5 +1,6 @@
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import { getPlatformById } from '@/config/platforms';
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import type { CrawlProgressStep, CrawlTaskState } from '@/types';
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import type { CrawlProgressStep, CrawlTaskState, PlatformConfig, PlatformStepConfig } from '@/types';
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import { scrapeDomFields, type DomScrapeResult } from './domScraper';
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import type { BackgroundCommand, BackgroundResponse, CrawlStateResponse } from './types';
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/** chrome.storage.local 中保存当前爬取任务状态的键名。 */
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@@ -83,6 +84,7 @@ async function startCrawl(platformId: string): Promise<CrawlStateResponse> {
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/** 补充 windowId 后的任务状态,后续可用于取消或监听窗口关闭。 */
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const stateWithWindow = { ...nextState, windowId: windowInfo.id };
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await setCrawlTaskState(stateWithWindow);
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void runCrawlSteps(platform, stateWithWindow);
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return { ok: true, data: stateWithWindow };
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} catch (error: unknown) {
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/** 窗口创建失败时写入的失败状态,供 popup/content 显示错误进度。 */
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@@ -98,6 +100,229 @@ async function startCrawl(platformId: string): Promise<CrawlStateResponse> {
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}
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}
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/** 按平台 steps 顺序执行页面跳转、DOM 等待、字段抓取和进度更新。 */
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async function runCrawlSteps(platform: PlatformConfig, initialState: CrawlTaskState): Promise<void> {
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if (!initialState.windowId) {
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return;
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}
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try {
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/** 新窗口中的目标标签页 ID,后续所有跳转和脚本注入都依赖它。 */
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const tabId = await getWindowActiveTabId(initialState.windowId);
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for (let stepIndex = 0; stepIndex < platform.steps.length; stepIndex += 1) {
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/** 当前正在执行的平台页面步骤配置。 */
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const step = platform.steps[stepIndex];
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if (!(await isTaskRunning(initialState.id))) {
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return;
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}
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await markStepRunning(initialState.id, stepIndex);
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await openStepPage(tabId, step.url);
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/** 当前页面核心 DOM 是否已经出现。 */
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const isReady = await waitForStepReady(tabId, step);
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if (!isReady) {
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await markStepFailed(initialState.id, stepIndex, '页面关键 DOM 未加载完成');
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await markTaskFailed(initialState.id);
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return;
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}
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/** 注入页面执行后的字段抓取结果。 */
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const data = await scrapeStepFields(tabId, step);
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console.log(`[crawl] ${platform.name} - ${step.name} 提取成功`, data);
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await markStepSuccess(initialState.id, stepIndex);
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}
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await markTaskCompleted(initialState.id);
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} catch (error: unknown) {
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console.error('[crawl] 执行失败', error);
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await markTaskFailed(initialState.id, error instanceof Error ? error.message : '爬取执行失败');
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}
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}
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/** 获取指定窗口中的活动 tab ID。 */
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async function getWindowActiveTabId(windowId: number): Promise<number> {
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/** 指定窗口中查询到的标签页列表。 */
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const tabs = await chrome.tabs.query({ windowId, active: true });
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/** 当前窗口里用于承载爬取页面的活动标签页。 */
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const tab = tabs[0];
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if (!tab?.id) {
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throw new Error('未找到爬取窗口中的标签页');
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}
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return tab.id;
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}
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/** 打开某个 steps 页面,并等待浏览器报告 tab 加载完成。 */
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async function openStepPage(tabId: number, url: string): Promise<void> {
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await chrome.tabs.update(tabId, { url, active: true });
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await waitForTabLoaded(tabId);
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}
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/** 等待 tab 完成页面加载。 */
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function waitForTabLoaded(tabId: number): Promise<void> {
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return new Promise((resolve) => {
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/** 页面加载兜底定时器,避免某些站点不触发 complete 时流程永久挂起。 */
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const timeout = globalThis.setTimeout(() => {
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chrome.tabs.onUpdated.removeListener(handleUpdated);
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resolve();
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}, 15000);
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/** chrome.tabs.onUpdated 的监听器,用于捕获指定 tab 的 complete 状态。 */
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function handleUpdated(updatedTabId: number, changeInfo: { status?: string }) {
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if (updatedTabId === tabId && changeInfo.status === 'complete') {
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globalThis.clearTimeout(timeout);
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chrome.tabs.onUpdated.removeListener(handleUpdated);
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resolve();
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}
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}
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chrome.tabs.onUpdated.addListener(handleUpdated);
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});
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}
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/** 等待步骤配置中的 checkSelector 出现;第一次超时后刷新页面再重试一次。 */
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async function waitForStepReady(tabId: number, step: PlatformStepConfig): Promise<boolean> {
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if (await waitForSelector(tabId, step.checkSelector, 5000)) {
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return true;
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}
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await chrome.tabs.reload(tabId);
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await waitForTabLoaded(tabId);
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return waitForSelector(tabId, step.checkSelector, 5000);
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}
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/** 在目标页面轮询检查指定 selector 是否存在。 */
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async function waitForSelector(tabId: number, selector: string, timeoutMs: number): Promise<boolean> {
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/** 轮询开始时间,用于控制最大等待时长。 */
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const startedAt = Date.now();
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while (Date.now() - startedAt < timeoutMs) {
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/** 当前页面是否已经能查询到目标元素。 */
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const exists = await checkSelectorExists(tabId, selector);
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if (exists) {
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return true;
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}
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await sleep(500);
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}
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return false;
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}
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/** 注入轻量脚本检查页面里是否存在指定 selector。 */
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async function checkSelectorExists(tabId: number, selector: string): Promise<boolean> {
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/** chrome.scripting.executeScript 返回的注入执行结果。 */
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const results = await chrome.scripting.executeScript({
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target: { tabId },
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func: (targetSelector: string) => Boolean(document.querySelector(targetSelector)),
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args: [selector],
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});
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return Boolean(results[0]?.result);
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}
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/** 注入 domScraper 到目标页面,并根据当前 step.fields 提取页面数据。 */
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async function scrapeStepFields(tabId: number, step: PlatformStepConfig): Promise<DomScrapeResult | null> {
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/** 目标页面执行 DOM 抓取后返回的结果数组。 */
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const results = await chrome.scripting.executeScript({
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target: { tabId },
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func: scrapeDomFields,
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args: [step.fields],
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});
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return results[0]?.result ?? null;
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}
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/** 判断指定任务是否仍处于 running 状态。 */
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async function isTaskRunning(taskId: string): Promise<boolean> {
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/** 当前 storage 中的任务状态。 */
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const state = await getCrawlTaskState();
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return state?.id === taskId && state.status === 'running';
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}
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/** 将指定步骤标记为运行中,同时把其它未完成步骤保持为等待。 */
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async function markStepRunning(taskId: string, stepIndex: number): Promise<void> {
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await updateCrawlTaskState(taskId, (state) => ({
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...state,
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currentStepIndex: stepIndex,
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status: 'running',
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steps: state.steps.map((step, index) => ({
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...step,
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status: index === stepIndex ? 'running' : step.status,
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message: index === stepIndex ? undefined : step.message,
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})),
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}));
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}
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/** 将指定步骤标记为成功。 */
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async function markStepSuccess(taskId: string, stepIndex: number): Promise<void> {
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await updateCrawlTaskState(taskId, (state) => ({
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...state,
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steps: state.steps.map((step, index) =>
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index === stepIndex ? { ...step, status: 'success', message: undefined } : step,
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),
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}));
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}
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/** 将指定步骤标记为失败,并记录失败原因。 */
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async function markStepFailed(taskId: string, stepIndex: number, message: string): Promise<void> {
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await updateCrawlTaskState(taskId, (state) => ({
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...state,
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currentStepIndex: stepIndex,
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steps: state.steps.map((step, index) =>
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index === stepIndex ? { ...step, status: 'failed', message } : step,
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),
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}));
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}
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/** 将整个任务标记为完成。 */
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async function markTaskCompleted(taskId: string): Promise<void> {
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await updateCrawlTaskState(taskId, (state) => ({
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...state,
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status: 'completed',
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steps: state.steps.map((step) => (step.status === 'running' ? { ...step, status: 'success' } : step)),
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}));
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}
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/** 将整个任务标记为失败。 */
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async function markTaskFailed(taskId: string, message = '爬取失败'): Promise<void> {
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await updateCrawlTaskState(taskId, (state) => ({
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...state,
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status: 'failed',
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steps: state.steps.map((step, index) =>
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index === state.currentStepIndex && step.status === 'running' ? { ...step, status: 'failed', message } : step,
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),
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}));
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}
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||||
|
||||
/** 读取任务状态后执行不可变更新,避免覆盖已取消或已替换的任务。 */
|
||||
async function updateCrawlTaskState(
|
||||
taskId: string,
|
||||
updater: (state: CrawlTaskState) => CrawlTaskState,
|
||||
): Promise<void> {
|
||||
/** 当前 storage 中最新的任务状态。 */
|
||||
const state = await getCrawlTaskState();
|
||||
|
||||
if (!state || state.id !== taskId || state.status === 'canceled') {
|
||||
return;
|
||||
}
|
||||
|
||||
await setCrawlTaskState(updater(state));
|
||||
}
|
||||
|
||||
/** 睡眠工具,用于轮询 DOM 等待。 */
|
||||
function sleep(ms: number): Promise<void> {
|
||||
return new Promise((resolve) => {
|
||||
globalThis.setTimeout(resolve, ms);
|
||||
});
|
||||
}
|
||||
|
||||
/** 取消当前爬取任务,并尝试关闭正在爬取的平台窗口。 */
|
||||
async function cancelCrawl(): Promise<CrawlStateResponse> {
|
||||
/** 当前保存的爬取任务状态。 */
|
||||
|
||||
@@ -33,8 +33,12 @@ export interface PlatformPaginationConfig {
|
||||
export interface PlatformTablePartConfig {
|
||||
/** 当前 table 或表格片段的名称。 */
|
||||
label: string;
|
||||
/** 当前 table 或表格片段的兼容名称,兼容 message.js 中的 name 写法。 */
|
||||
name?: string;
|
||||
/** 当前 table 或表格片段的 CSS 选择器。 */
|
||||
className: string;
|
||||
/** 当前 table 或表格片段的兼容选择器,兼容 message.js 中的 select 写法。 */
|
||||
select?: string;
|
||||
/** 行元素选择器,不填时由采集逻辑使用默认行选择器。 */
|
||||
rowSelector?: string;
|
||||
/** 当前 table 或表格片段下需要采集的字段。 */
|
||||
@@ -49,6 +53,10 @@ export interface PlatformFieldConfig {
|
||||
label: string;
|
||||
/** 字段对应的 CSS 选择器。 */
|
||||
className: string;
|
||||
/** 需要提取的属性名;不填时默认提取文本,图片和链接会自动取 src/href。 */
|
||||
attr?: string;
|
||||
/** 表格字段所属的表格分段名称,用于横向拼接多 table 行数据。 */
|
||||
part?: string;
|
||||
/** 字段类型:0 普通元素(默认),1 列表,2 表格。 */
|
||||
type?: PlatformFieldType;
|
||||
/** 进入该字段采集前需要执行的点击条件。 */
|
||||
|
||||
@@ -1 +1 @@
|
||||
{"root":["./manifest.config.ts","./message.js","./vite.config.ts","./src/background/index.ts","./src/background/service.ts","./src/background/types.ts","./src/config/platforms.ts","./src/content/app.vue","./src/content/main.ts","./src/options/app.vue","./src/options/main.ts","./src/popup/app.vue","./src/popup/main.ts","./src/shared/auth.ts","./src/types/crawl.ts","./src/types/index.ts","./src/types/platform.ts"],"version":"5.9.3"}
|
||||
{"root":["./manifest.config.ts","./message.js","./vite.config.ts","./src/background/domscraper.ts","./src/background/index.ts","./src/background/service.ts","./src/background/types.ts","./src/config/platforms.ts","./src/content/app.vue","./src/content/main.ts","./src/options/app.vue","./src/options/main.ts","./src/popup/app.vue","./src/popup/main.ts","./src/shared/auth.ts","./src/types/crawl.ts","./src/types/index.ts","./src/types/platform.ts"],"version":"5.9.3"}
|
||||
Reference in New Issue
Block a user