mirror of
https://github.com/DIYgod/RSSHub.git
synced 2025-12-02 01:58:11 +08:00
322 lines
15 KiB
JavaScript
322 lines
15 KiB
JavaScript
const entities = require('entities');
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const cheerio = require('cheerio');
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const { simplecc } = require('simplecc-wasm');
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const got = require('@/utils/got');
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const config = require('@/config').value;
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const RE2 = require('re2');
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let mercury_parser;
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const resolveRelativeLink = ($, elem, attr, baseUrl) => {
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const $elem = $(elem);
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if (baseUrl) {
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try {
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const oldAttr = $elem.attr(attr);
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if (oldAttr) {
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// e.g. <video><source src="https://example.com"></video> should leave <video> unchanged
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$elem.attr(attr, new URL(oldAttr, baseUrl).href);
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}
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} catch (e) {
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// no-empty
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}
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}
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};
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module.exports = async (ctx, next) => {
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await next();
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if (!ctx.state.data && !ctx._matchedRoute) {
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// Given that the official demo has a cache TTL of 2h, a "wrong path" page will be cached by CloudFlare for
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// 200h (8.33d).
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// What makes it worse is that the documentation contains status badges to detect the availability of routes,
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// but the documentation is updated more timely than the official demo, so the every example path of every
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// new route will probably have a "wrong path" page cached for at least 200h soon after accepted. That is to
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// say, the example paths of a new route will probably be unavailable on the public demo in the first 200h
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// after accepted.
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// As a conclusion, the next 3 lines has been commented out. (exactly the same behavior as any internal error)
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// ctx.set({
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// 'Cache-Control': `public, max-age=${config.cache.routeExpire * 100}`,
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// });
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throw Error('wrong path');
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}
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if (ctx.state.data) {
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if ((!ctx.state.data.item || ctx.state.data.item.length === 0) && !ctx.state.data.allowEmpty) {
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throw Error('this route is empty, please check the original site or <a href="https://github.com/DIYgod/RSSHub/issues/new/choose">create an issue</a>');
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}
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// fix allowEmpty
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ctx.state.data.item = ctx.state.data.item || [];
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// decode HTML entities
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ctx.state.data.title && (ctx.state.data.title = entities.decodeXML(ctx.state.data.title + ''));
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ctx.state.data.description && (ctx.state.data.description = entities.decodeXML(ctx.state.data.description + ''));
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// sort items
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if (ctx.query.sorted !== 'false') {
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ctx.state.data.item = ctx.state.data.item.sort((a, b) => +new Date(b.pubDate || 0) - +new Date(a.pubDate || 0));
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}
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const handleItem = (item) => {
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item.title && (item.title = entities.decodeXML(item.title + ''));
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// handle pubDate
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if (item.pubDate) {
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item.pubDate = new Date(item.pubDate).toUTCString();
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}
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// handle link
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if (item.link) {
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let baseUrl = ctx.state.data.link;
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if (baseUrl && !baseUrl.match(/^https?:\/\//)) {
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if (baseUrl.match(/^\/\//)) {
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baseUrl = 'http:' + baseUrl;
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} else {
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baseUrl = 'http://' + baseUrl;
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}
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}
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item.link = new URL(item.link, baseUrl).href;
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}
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// handle description
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if (item.description) {
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const $ = cheerio.load(item.description);
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let baseUrl = item.link || ctx.state.data.link;
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if (baseUrl && !baseUrl.match(/^https?:\/\//)) {
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if (baseUrl.match(/^\/\//)) {
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baseUrl = 'http:' + baseUrl;
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} else {
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baseUrl = 'http://' + baseUrl;
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}
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}
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$('script').remove();
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$('img').each((_, ele) => {
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const $ele = $(ele);
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// fix lazyload
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if (!$ele.attr('src')) {
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const lazySrc = $ele.attr('data-src') || $ele.attr('data-original');
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if (lazySrc) {
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$ele.attr('src', lazySrc);
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} else {
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for (const key in ele.attribs) {
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const value = ele.attribs[key].trim();
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if (['.gif', '.png', '.jpg', '.webp'].some((suffix) => value.includes(suffix))) {
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$ele.attr('src', value);
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break;
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}
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}
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}
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}
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// redundant attributes
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['onclick', 'onerror', 'onload'].forEach((e) => {
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$ele.removeAttr(e);
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});
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});
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// resolve relative link & fix referrer policy
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// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy
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// https://www.w3schools.com/tags/att_href.asp
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$('a, area').each((_, elem) => {
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resolveRelativeLink($, elem, 'href', baseUrl);
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// $(elem).attr('rel', 'noreferrer'); // currently no such a need
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});
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// https://www.w3schools.com/tags/att_src.asp
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$('img, video, audio, source, iframe, embed, track').each((_, elem) => {
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resolveRelativeLink($, elem, 'src', baseUrl);
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});
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$('video[poster]').each((_, elem) => {
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resolveRelativeLink($, elem, 'poster', baseUrl);
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});
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$('img, iframe').each((_, elem) => {
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$(elem).attr('referrerpolicy', 'no-referrer');
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});
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item.description = $('body').html() + '' + (config.suffix || '');
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const quote = item._extra?.links?.find((e) => e.type === 'quote');
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if (quote && $('.rsshub-quote').length) {
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quote.content_html = $.html($('.rsshub-quote'));
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}
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}
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return item;
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};
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ctx.state.data.item = await Promise.all(ctx.state.data.item.map(handleItem));
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if (ctx.query) {
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// limit
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if (ctx.query.limit) {
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ctx.state.data.item = ctx.state.data.item.slice(0, parseInt(ctx.query.limit));
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}
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// filter
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const makeRegex = (string) => {
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// default: case_senstivie = true
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const engine = config.feature.filter_regex_engine;
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if (ctx.query.filter_case_sensitive === 'false') {
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switch (engine) {
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case 'regexp':
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return new RegExp(string, 'i');
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case 're2':
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return new RE2(string, 'i');
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default:
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throw Error(`Invalid Engine Value: ${engine}, please check your config.`);
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}
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} else {
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switch (engine) {
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case 'regexp':
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return new RegExp(string);
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case 're2':
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return new RE2(string);
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default:
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throw Error(`Invalid Engine Value: ${engine}, please check your config.`);
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}
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}
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};
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if (ctx.query.filter) {
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ctx.state.data.item = ctx.state.data.item.filter((item) => {
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const title = item.title || '';
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const description = item.description || title;
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const author = item.author || '';
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const category = item.category ? (Array.isArray(item.category) ? item.category : [item.category]) : [];
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const isFilter =
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title.match(makeRegex(ctx.query.filter)) || description.match(makeRegex(ctx.query.filter)) || author.match(makeRegex(ctx.query.filter)) || category.some((c) => c.match(makeRegex(ctx.query.filter)));
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return isFilter;
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});
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}
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// 启用filter参数时，无效filter_title/description/author/category
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if (!ctx.query.filter && (ctx.query.filter_title || ctx.query.filter_description || ctx.query.filter_author || ctx.query.filter_category)) {
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ctx.state.data.item = ctx.state.data.item.filter((item) => {
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const title = item.title || '';
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const description = item.description || title;
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const author = item.author || '';
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const category = item.category ? (Array.isArray(item.category) ? item.category : [item.category]) : [];
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let isFilter = true;
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ctx.query.filter_title && (isFilter = title.match(makeRegex(ctx.query.filter_title)));
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ctx.query.filter_description && (isFilter = isFilter && description.match(makeRegex(ctx.query.filter_description)));
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ctx.query.filter_author && (isFilter = isFilter && author.match(makeRegex(ctx.query.filter_author)));
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ctx.query.filter_category && (isFilter = isFilter && category.some((c) => c.match(makeRegex(ctx.query.filter_category))));
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return isFilter;
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});
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}
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if (ctx.query.filterout || ctx.query.filterout_title || ctx.query.filterout_description || ctx.query.filterout_author || ctx.query.filterout_category) {
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if (ctx.query.filterout) {
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ctx.query.filterout_title = ctx.query.filterout;
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ctx.query.filterout_description = ctx.query.filterout;
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}
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ctx.state.data.item = ctx.state.data.item.filter((item) => {
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const title = item.title;
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const description = item.description || title;
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const author = item.author || '';
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const category = item.category ? (Array.isArray(item.category) ? item.category : [item.category]) : [];
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let isFilter = true;
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ctx.query.filterout_title && (isFilter = !title.match(makeRegex(ctx.query.filterout_title)));
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ctx.query.filterout_description && (isFilter = isFilter && !description.match(makeRegex(ctx.query.filterout_description)));
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ctx.query.filterout_author && (isFilter = isFilter && !author.match(makeRegex(ctx.query.filterout_author)));
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ctx.query.filterout_category && (isFilter = isFilter && !category.some((c) => c.match(makeRegex(ctx.query.filterout_category))));
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return isFilter;
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});
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}
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if (ctx.query.filter_time) {
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const now = Date.now();
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ctx.state.data.item = ctx.state.data.item.filter(({ pubDate }) => {
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let isFilter = true;
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try {
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isFilter = !pubDate || now - new Date(pubDate).getTime() <= parseInt(ctx.query.filter_time) * 1000;
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} catch (err) {
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// no-empty
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}
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return isFilter;
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});
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}
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// telegram instant view
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if (ctx.query.tgiv) {
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ctx.state.data.item.map((item) => {
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const encodedlink = encodeURIComponent(item.link);
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item.link = `https://t.me/iv?url=${encodedlink}&rhash=${ctx.query.tgiv}`;
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return item;
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});
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}
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// fulltext
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if (ctx.query.mode && ctx.query.mode.toLowerCase() === 'fulltext') {
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const tasks = ctx.state.data.item.map(async (item) => {
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const { link, author, description } = item;
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const parsed_result = await ctx.cache.tryGet(`mercury-cache-${link}`, async () => {
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// if parser failed, return default description and not report error
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try {
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mercury_parser = mercury_parser || require('@postlight/parser');
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const { data: res } = await got(link);
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const $ = cheerio.load(res);
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const result = await mercury_parser.parse(link, {
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html: $.html(),
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});
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return result;
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} catch (e) {
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// no-empty
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}
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});
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item.author = author || (parsed_result ? parsed_result.author : '');
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item.description = parsed_result ? entities.decodeXML(parsed_result.content) : description;
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});
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await Promise.all(tasks);
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}
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// scihub
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if (ctx.query.scihub) {
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ctx.state.data.item.map((item) => {
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item.link = item.doi ? `${config.scihub.host}${item.doi}` : `${config.scihub.host}${item.link}`;
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return item;
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});
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}
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// opencc
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if (ctx.query.opencc) {
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ctx.state.data.item.forEach((item) => {
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item.title = simplecc(item.title ?? item.link, ctx.query.opencc);
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item.description = simplecc(item.description ?? item.title ?? item.link, ctx.query.opencc);
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});
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}
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// brief
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if (ctx.query.brief) {
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const num = /[1-9]\d{2,}/;
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if (num.test(ctx.query.brief)) {
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ctx.query.brief = parseInt(ctx.query.brief);
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ctx.state.data.item.forEach((item) => {
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let text;
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if (item.description) {
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text = item.description.replace(/<\/?[^>]+(>|$)/g, '');
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}
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if (text && text.length) {
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if (text.length > ctx.query.brief) {
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item.description = `<p>${text.substring(0, ctx.query.brief)}…</p>`;
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} else {
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item.description = `<p>${text}</p>`;
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}
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}
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});
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} else {
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throw Error(`Invalid parameter <code>brief=${ctx.query.brief}</code>. Please check the doc https://docs.rsshub.app/parameter.html#shu-chu-jian-xun`);
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}
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}
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// some parameters are processed in `anti-hotlink.js`
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}
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}
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};
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