19b0f8545d
- Replaced the previous comment loading JavaScript with a more efficient scrolling and collection mechanism. - Improved the logic for determining scroll targets and handling comment counts. - Enhanced error handling and logging for comment loading failures. - Removed deprecated code related to the old comment loading approach.
267 lines
8.3 KiB
Go
267 lines
8.3 KiB
Go
package xiaohongshu
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import (
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"context"
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"encoding/json"
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"fmt"
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"time"
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"github.com/go-rod/rod"
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"github.com/sirupsen/logrus"
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"github.com/xpzouying/xiaohongshu-mcp/errors"
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)
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// FeedDetailAction 表示 Feed 详情页动作
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type FeedDetailAction struct {
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page *rod.Page
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}
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// NewFeedDetailAction 创建 Feed 详情页动作
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func NewFeedDetailAction(page *rod.Page) *FeedDetailAction {
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return &FeedDetailAction{page: page}
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}
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// GetFeedDetail 获取 Feed 详情页数据
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func (f *FeedDetailAction) GetFeedDetail(ctx context.Context, feedID, xsecToken string, loadAllComments bool) (*FeedDetailResponse, error) {
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page := f.page.Context(ctx).Timeout(5 * time.Minute)
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// 构建详情页 URL
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url := makeFeedDetailURL(feedID, xsecToken)
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logrus.Infof("打开 feed 详情页: %s", url)
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// 导航到详情页
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page.MustNavigate(url)
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page.MustWaitDOMStable()
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time.Sleep(1 * time.Second)
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if loadAllComments {
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scrollAllCommentsJS := `() => {
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const INTERVAL_MS = 900;
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const STAGNANT_LIMIT = 8;
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const NO_CHANGE_SCROLL_LIMIT = 3;
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const DELTA_MIN = 480;
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const SCROLL_TIMEOUT = 900;
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const MAX_ATTEMPTS = 200;
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const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
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const scrollRoot = () => document.scrollingElement || document.documentElement || document.body;
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const getContainer = () => document.querySelector('.comments-container');
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const getCommentCount = (container) =>
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container ? container.querySelectorAll('.comment-item, .comment-item-sub, .comment').length : 0;
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const getTotalCount = (container) => {
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if (!container) return null;
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const text = (container.querySelector('.total')?.textContent || '').replace(/\s+/g, '');
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const match = text.match(/共(\d+)条评论/);
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return match ? parseInt(match[1], 10) : null;
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};
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const getScrollMetrics = (el) => {
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if (!el) {
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return { top: 0, max: 0, client: window.innerHeight };
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}
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if (el === window || el === document || el === document.body || el === document.documentElement) {
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const root = scrollRoot();
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return {
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top: root.scrollTop,
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max: Math.max(root.scrollHeight - root.clientHeight, 0),
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client: root.clientHeight || window.innerHeight
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};
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}
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return {
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top: el.scrollTop,
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max: Math.max(el.scrollHeight - el.clientHeight, 0),
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client: el.clientHeight
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};
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};
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const setScrollTop = (el, value) => {
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if (!el) return;
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if (el === window || el === document || el === document.body || el === document.documentElement) {
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const root = scrollRoot();
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root.scrollTop = value;
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window.scrollTo(0, value);
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return;
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}
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el.scrollTop = value;
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};
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const dispatchWheel = (el, delta) => {
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if (!el) return;
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try {
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const wheel = new WheelEvent('wheel', {
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deltaY: delta,
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bubbles: true,
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cancelable: true
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});
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el.dispatchEvent(wheel);
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el.dispatchEvent(new Event('scroll', { bubbles: true }));
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} catch (err) {
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console.debug('dispatchWheel error', err);
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}
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};
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let cachedTarget = null;
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const collectCandidates = () => {
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const container = getContainer();
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const candidatesSet = new Set();
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if (container) {
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let current = container;
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while (current) {
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if (current instanceof HTMLElement) {
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candidatesSet.add(current);
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}
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current = current.parentElement;
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}
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container.querySelectorAll('*').forEach((node) => {
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if (node instanceof HTMLElement) {
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candidatesSet.add(node);
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}
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});
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}
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[document.body, document.documentElement].forEach((node) => {
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if (node instanceof HTMLElement) {
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candidatesSet.add(node);
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}
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});
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const candidates = [];
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candidatesSet.forEach((node) => {
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const style = window.getComputedStyle(node);
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const overflowY = style.overflowY;
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const scrollable = node.scrollHeight - node.clientHeight > 40;
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const hasScrollStyle = /auto|scroll|overlay/i.test(overflowY);
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const weight =
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(node.contains(container) ? 1000 : 0) +
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(node === container ? 800 : 0) +
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(hasScrollStyle ? 400 : 0) +
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(scrollable ? 300 : 0) -
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(node === document.body || node === document.documentElement ? 50 : 0);
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if (scrollable || hasScrollStyle || node === document.body || node === document.documentElement) {
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candidates.push({ node, weight });
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}
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});
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candidates.sort((a, b) => b.weight - a.weight);
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return candidates.map((candidate) => candidate.node);
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};
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const findScrollTarget = () => {
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if (cachedTarget && cachedTarget.isConnected) {
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return cachedTarget;
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}
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const candidates = collectCandidates();
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cachedTarget = candidates.find((node) => {
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const metrics = getScrollMetrics(node);
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return metrics.max > 30 || metrics.client > 0;
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}) || scrollRoot();
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return cachedTarget;
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};
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const performScroll = (target) => {
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const scrollTarget = target || findScrollTarget();
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if (!scrollTarget) {
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window.scrollBy(0, window.innerHeight * 0.8);
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return;
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}
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const metrics = getScrollMetrics(scrollTarget);
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const beforeTop = metrics.top;
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const desired = metrics.max > 0 ? Math.min(metrics.top + Math.max(metrics.client * 0.85, DELTA_MIN), metrics.max) : metrics.top + Math.max(metrics.client * 0.85, DELTA_MIN);
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const applied = Math.max(0, desired - metrics.top);
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setScrollTop(scrollTarget, desired);
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dispatchWheel(scrollTarget, applied);
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const afterTop = getScrollMetrics(scrollTarget).top;
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if (Math.abs(afterTop - beforeTop) < 5 && scrollTarget !== scrollRoot()) {
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const root = scrollRoot();
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const rootBefore = root.scrollTop;
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root.scrollTop = rootBefore + applied;
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window.scrollBy(0, applied);
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dispatchWheel(root, applied);
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}
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};
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return (async () => {
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let lastCount = 0;
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let stagnantChecks = 0;
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let noScrollChangeCount = 0;
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for (let attempt = 0; attempt < MAX_ATTEMPTS; attempt++) {
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const container = getContainer();
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if (!container) {
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await sleep(300);
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continue;
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}
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const total = getTotalCount(container);
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const count = getCommentCount(container);
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if (total && count >= total) {
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return { status: 'complete', reason: 'total', attempts: attempt + 1, count, total };
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}
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if (count === lastCount) {
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stagnantChecks += 1;
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} else {
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lastCount = count;
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stagnantChecks = 0;
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}
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if (stagnantChecks >= STAGNANT_LIMIT) {
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return { status: 'complete', reason: 'stagnant', attempts: attempt + 1, count, total };
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}
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const target = findScrollTarget();
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const beforeTop = getScrollMetrics(target).top;
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performScroll(target);
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await sleep(SCROLL_TIMEOUT);
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const afterTop = getScrollMetrics(target).top;
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if (Math.abs(afterTop - beforeTop) < 5) {
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noScrollChangeCount += 1;
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} else {
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noScrollChangeCount = 0;
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}
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if (noScrollChangeCount >= NO_CHANGE_SCROLL_LIMIT) {
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return { status: 'complete', reason: 'no-scroll-change', attempts: attempt + 1, count, total };
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}
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if (INTERVAL_MS > SCROLL_TIMEOUT) {
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await sleep(INTERVAL_MS - SCROLL_TIMEOUT);
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}
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}
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return { status: 'timeout' };
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})()
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.then((res) => JSON.stringify(res))
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.catch((err) => JSON.stringify({ status: 'error', message: err && err.message ? err.message : String(err) }));
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}`
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if res, err := page.Eval(scrollAllCommentsJS); err != nil {
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logrus.Warnf("加载全部评论失败: %v", err)
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} else if res != nil {
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if str := res.Value.Str(); str != "" {
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logrus.Infof("评论滚动结果: %s", str)
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}
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}
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}
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result := page.MustEval(`() => {
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if (window.__INITIAL_STATE__ &&
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window.__INITIAL_STATE__.note &&
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window.__INITIAL_STATE__.note.noteDetailMap) {
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const noteDetailMap = window.__INITIAL_STATE__.note.noteDetailMap;
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return JSON.stringify(noteDetailMap);
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}
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return "";
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}`).String()
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if result == "" {
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return nil, errors.ErrNoFeedDetail
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}
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var noteDetailMap map[string]struct {
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Note FeedDetail `json:"note"`
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Comments CommentList `json:"comments"`
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}
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if err := json.Unmarshal([]byte(result), ¬eDetailMap); err != nil {
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return nil, fmt.Errorf("failed to unmarshal noteDetailMap: %w", err)
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}
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noteDetail, exists := noteDetailMap[feedID]
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if !exists {
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return nil, fmt.Errorf("feed %s not found in noteDetailMap", feedID)
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}
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return &FeedDetailResponse{
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Note: noteDetail.Note,
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Comments: noteDetail.Comments,
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}, nil
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}
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func makeFeedDetailURL(feedID, xsecToken string) string {
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return fmt.Sprintf("https://www.xiaohongshu.com/explore/%s?xsec_token=%s&xsec_source=pc_feed", feedID, xsecToken)
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}
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