feat(baoyu-url-to-markdown): add HTML snapshot saving and Defuddle fallback pipeline

- Save rendered HTML as sibling -captured.html file alongside markdown
- Defuddle-first conversion with automatic fallback to legacy Readability/selector extractor
- Add rawHtml, conversionMethod, fallbackReason to ConversionResult
- Log converter method and fallback reason in CLI output
This commit is contained in:
Jim Liu 宝玉
2026-03-06 21:18:21 -06:00
parent 3b031c7768
commit 5560db595a
7 changed files with 1130 additions and 20 deletions
@@ -0,0 +1,191 @@
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"safer-buffer": ["safer-buffer@2.1.2", "", {}, "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="],
"saxes": ["saxes@6.0.0", "", { "dependencies": { "xmlchars": "^2.2.0" } }, "sha512-xAg7SOnEhrm5zI3puOOKyy1OMcMlIJZYNJY7xLBwSze0UjhPLnWfj2GF2EpT0jmzaJKIWKHLsaSSajf35bcYnA=="],
"symbol-tree": ["symbol-tree@3.2.4", "", {}, "sha512-9QNk5KwDF+Bvz+PyObkmSYjI5ksVUYtjW7AU22r2NKcfLJcXp96hkDWU3+XndOsUb+AQ9QhfzfCT2O+CNWT5Tw=="],
"temml": ["temml@0.13.1", "", {}, "sha512-/fL1utq8QUD9YpcLeZHPRnp9Cbzbexq5hZl5uSBhf8mNYiKkcS4eYbLidDB+/nF8C+RHAcBQbKw2bKoS83mz1Q=="],
"tough-cookie": ["tough-cookie@4.1.4", "", { "dependencies": { "psl": "^1.1.33", "punycode": "^2.1.1", "universalify": "^0.2.0", "url-parse": "^1.5.3" } }, "sha512-Loo5UUvLD9ScZ6jh8beX1T6sO1w2/MpCRpEP7V280GKMVUQ0Jzar2U3UJPsrdbziLEMMhu3Ujnq//rhiFuIeag=="],
"tr46": ["tr46@5.1.1", "", { "dependencies": { "punycode": "^2.3.1" } }, "sha512-hdF5ZgjTqgAntKkklYw0R03MG2x/bSzTtkxmIRw/sTNV8YXsCJ1tfLAX23lhxhHJlEf3CRCOCGGWw3vI3GaSPw=="],
"turndown": ["turndown@7.2.2", "", { "dependencies": { "@mixmark-io/domino": "^2.2.0" } }, "sha512-1F7db8BiExOKxjSMU2b7if62D/XOyQyZbPKq/nUwopfgnHlqXHqQ0lvfUTeUIr1lZJzOPFn43dODyMSIfvWRKQ=="],
"turndown-plugin-gfm": ["turndown-plugin-gfm@1.0.2", "", {}, "sha512-vwz9tfvF7XN/jE0dGoBei3FXWuvll78ohzCZQuOb+ZjWrs3a0XhQVomJEb2Qh4VHTPNRO4GPZh0V7VRbiWwkRg=="],
"uhyphen": ["uhyphen@0.2.0", "", {}, "sha512-qz3o9CHXmJJPGBdqzab7qAYuW8kQGKNEuoHFYrBwV6hWIMcpAmxDLXojcHfFr9US1Pe6zUswEIJIbLI610fuqA=="],
"universalify": ["universalify@0.2.0", "", {}, "sha512-CJ1QgKmNg3CwvAv/kOFmtnEN05f0D/cn9QntgNOQlQF9dgvVTHj3t+8JPdjqawCHk7V/KA+fbUqzZ9XWhcqPUg=="],
"url-parse": ["url-parse@1.5.10", "", { "dependencies": { "querystringify": "^2.1.1", "requires-port": "^1.0.0" } }, "sha512-WypcfiRhfeUP9vvF0j6rw0J3hrWrw6iZv3+22h6iRMJ/8z1Tj6XfLP4DsUix5MhMPnXpiHDoKyoZ/bdCkwBCiQ=="],
"w3c-xmlserializer": ["w3c-xmlserializer@5.0.0", "", { "dependencies": { "xml-name-validator": "^5.0.0" } }, "sha512-o8qghlI8NZHU1lLPrpi2+Uq7abh4GGPpYANlalzWxyWteJOCsr/P+oPBA49TOLu5FTZO4d3F9MnWJfiMo4BkmA=="],
"webidl-conversions": ["webidl-conversions@7.0.0", "", {}, "sha512-VwddBukDzu71offAQR975unBIGqfKZpM+8ZX6ySk8nYhVoo5CYaZyzt3YBvYtRtO+aoGlqxPg/B87NGVZ/fu6g=="],
"whatwg-encoding": ["whatwg-encoding@3.1.1", "", { "dependencies": { "iconv-lite": "0.6.3" } }, "sha512-6qN4hJdMwfYBtE3YBTTHhoeuUrDBPZmbQaxWAqSALV/MeEnR5z1xd8UKud2RAkFoPkmB+hli1TZSnyi84xz1vQ=="],
"whatwg-mimetype": ["whatwg-mimetype@4.0.0", "", {}, "sha512-QaKxh0eNIi2mE9p2vEdzfagOKHCcj1pJ56EEHGQOVxp8r9/iszLUUV7v89x9O1p/T+NlTM5W7jW6+cz4Fq1YVg=="],
"whatwg-url": ["whatwg-url@14.2.0", "", { "dependencies": { "tr46": "^5.1.0", "webidl-conversions": "^7.0.0" } }, "sha512-De72GdQZzNTUBBChsXueQUnPKDkg/5A5zp7pFDuQAj5UFoENpiACU0wlCvzpAGnTkj++ihpKwKyYewn/XNUbKw=="],
"ws": ["ws@8.19.0", "", { "peerDependencies": { "bufferutil": "^4.0.1", "utf-8-validate": ">=5.0.2" }, "optionalPeers": ["bufferutil", "utf-8-validate"] }, "sha512-blAT2mjOEIi0ZzruJfIhb3nps74PRWTCz1IjglWEEpQl5XS/UNama6u2/rjFkDDouqr4L67ry+1aGIALViWjDg=="],
"xml-name-validator": ["xml-name-validator@5.0.0", "", {}, "sha512-EvGK8EJ3DhaHfbRlETOWAS5pO9MZITeauHKJyb8wyajUfQUenkIg2MvLDTZ4T/TgIcm3HU0TFBgWWboAZ30UHg=="],
"xmlchars": ["xmlchars@2.2.0", "", {}, "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw=="],
"cssstyle/rrweb-cssom": ["rrweb-cssom@0.8.0", "", {}, "sha512-guoltQEx+9aMf2gDZ0s62EcV8lsXR+0w8915TC3ITdn2YueuNjdAYh/levpU9nFaoChh9RUS5ZdQMrKfVEN9tw=="],
"dom-serializer/entities": ["entities@4.5.0", "", {}, "sha512-V0hjH4dGPh9Ao5p0MoRY6BVqtwCjhz6vI5LT8AJ55H+4g9/4vbHx1I54fS0XuclLhDHArPQCiMjDxjaL8fPxhw=="],
"htmlparser2/entities": ["entities@7.0.1", "", {}, "sha512-TWrgLOFUQTH994YUyl1yT4uyavY5nNB5muff+RtWaqNVCAK408b5ZnnbNAUEWLTCpum9w6arT70i1XdQ4UeOPA=="],
}
}
@@ -1,5 +1,7 @@
import { JSDOM } from "jsdom";
import { Defuddle } from "defuddle/node";
import { parseHTML } from "linkedom";
import { Readability } from "@mozilla/readability";
import TurndownService from "turndown";
import { gfm } from "turndown-plugin-gfm";
export interface PageMetadata {
url: string;
@@ -14,8 +16,103 @@ export interface PageMetadata {
export interface ConversionResult {
metadata: PageMetadata;
markdown: string;
rawHtml: string;
conversionMethod: string;
fallbackReason?: string;
}
interface ExtractionCandidate {
title: string | null;
byline: string | null;
excerpt: string | null;
published: string | null;
html: string | null;
textContent: string;
method: string;
}
type AnyRecord = Record<string, unknown>;
const MIN_CONTENT_LENGTH = 120;
const GOOD_CONTENT_LENGTH = 900;
const CONTENT_SELECTORS = [
"article",
"main article",
"[role='main'] article",
"[itemprop='articleBody']",
".article-content",
".article-body",
".post-content",
".entry-content",
".story-body",
"main",
"[role='main']",
"#content",
".content",
];
const REMOVE_SELECTORS = [
"script",
"style",
"noscript",
"template",
"iframe",
"svg",
"path",
"nav",
"aside",
"footer",
"header",
"form",
".advertisement",
".ads",
".social-share",
".related-articles",
".comments",
".newsletter",
".cookie-banner",
".cookie-consent",
"[role='navigation']",
"[aria-label*='cookie' i]",
];
const PUBLISHED_TIME_SELECTORS = [
"meta[property='article:published_time']",
"meta[name='pubdate']",
"meta[name='publishdate']",
"meta[name='date']",
"time[datetime]",
];
const ARTICLE_TYPES = new Set([
"Article",
"NewsArticle",
"BlogPosting",
"WebPage",
"ReportageNewsArticle",
]);
const NEXT_DATA_CONTENT_PATHS = [
"props.pageProps.content.body",
"props.pageProps.article.body",
"props.pageProps.article.content",
"props.pageProps.post.body",
"props.pageProps.post.content",
"props.pageProps.data.body",
"props.pageProps.story.body.content",
];
const LOW_QUALITY_MARKERS = [
/Join The Conversation/i,
/One Community\. Many Voices/i,
/Read our community guidelines/i,
/Create a free account to share your thoughts/i,
/Become a Forbes Member/i,
/Subscribe to trusted journalism/i,
/\bComments\b/i,
];
export const absolutizeUrlsScript = String.raw`
(function() {
const baseUrl = document.baseURI || location.href;
@@ -53,21 +150,791 @@ export const absolutizeUrlsScript = String.raw`
})()
`;
export async function extractContent(html: string, url: string): Promise<ConversionResult> {
const dom = new JSDOM(html, { url });
const result = await Defuddle(dom, url, { markdown: true });
function pickString(...values: unknown[]): string | null {
for (const value of values) {
if (typeof value === "string") {
const trimmed = value.trim();
if (trimmed) return trimmed;
}
}
return null;
}
const metadata: PageMetadata = {
function normalizeMarkdown(markdown: string): string {
return markdown
.replace(/\r\n/g, "\n")
.replace(/[ \t]+\n/g, "\n")
.replace(/\n{3,}/g, "\n\n")
.trim();
}
function parseDocument(html: string): Document {
const normalized = /<\s*html[\s>]/i.test(html)
? html
: `<!doctype html><html><body>${html}</body></html>`;
return parseHTML(normalized).document as unknown as Document;
}
function sanitizeHtml(html: string): string {
const { document } = parseHTML(`<div id="__root">${html}</div>`);
const root = document.querySelector("#__root");
if (!root) return html;
for (const selector of ["script", "style", "iframe", "noscript", "template", "svg", "path"]) {
for (const el of root.querySelectorAll(selector)) {
el.remove();
}
}
return root.innerHTML;
}
function extractTextFromHtml(html: string): string {
const { document } = parseHTML(`<!doctype html><html><body>${html}</body></html>`);
for (const selector of ["script", "style", "noscript", "template", "iframe", "svg", "path"]) {
for (const el of document.querySelectorAll(selector)) {
el.remove();
}
}
return document.body?.textContent?.replace(/\s+/g, " ").trim() ?? "";
}
function getMetaContent(document: Document, names: string[]): string | null {
for (const name of names) {
const element =
document.querySelector(`meta[name="${name}"]`) ??
document.querySelector(`meta[property="${name}"]`);
const content = element?.getAttribute("content");
if (content && content.trim()) return content.trim();
}
return null;
}
function flattenJsonLdItems(data: unknown): AnyRecord[] {
if (!data || typeof data !== "object") return [];
if (Array.isArray(data)) return data.flatMap(flattenJsonLdItems);
const item = data as AnyRecord;
if (Array.isArray(item["@graph"])) {
return (item["@graph"] as unknown[]).flatMap(flattenJsonLdItems);
}
return [item];
}
function parseJsonLdScripts(document: Document): AnyRecord[] {
const results: AnyRecord[] = [];
const scripts = document.querySelectorAll("script[type='application/ld+json']");
for (const script of scripts) {
try {
const data = JSON.parse(script.textContent ?? "");
results.push(...flattenJsonLdItems(data));
} catch {
// Ignore malformed blocks.
}
}
return results;
}
function isArticleType(item: AnyRecord): boolean {
const value = Array.isArray(item["@type"]) ? item["@type"][0] : item["@type"];
return typeof value === "string" && ARTICLE_TYPES.has(value);
}
function extractAuthorFromJsonLd(authorData: unknown): string | null {
if (typeof authorData === "string") return authorData;
if (!authorData || typeof authorData !== "object") return null;
if (Array.isArray(authorData)) {
const names = authorData
.map((author) => extractAuthorFromJsonLd(author))
.filter((name): name is string => Boolean(name));
return names.length > 0 ? names.join(", ") : null;
}
const author = authorData as AnyRecord;
return typeof author.name === "string" ? author.name : null;
}
function extractPrimaryJsonLdMeta(document: Document): Partial<PageMetadata> {
for (const item of parseJsonLdScripts(document)) {
if (!isArticleType(item)) continue;
return {
title: pickString(item.headline, item.name) ?? undefined,
description: pickString(item.description) ?? undefined,
author: extractAuthorFromJsonLd(item.author) ?? undefined,
published: pickString(item.datePublished, item.dateCreated) ?? undefined,
coverImage:
pickString(
item.image,
(item.image as AnyRecord | undefined)?.url,
(Array.isArray(item.image) ? item.image[0] : undefined) as unknown
) ?? undefined,
};
}
return {};
}
function extractPublishedTime(document: Document): string | null {
for (const selector of PUBLISHED_TIME_SELECTORS) {
const el = document.querySelector(selector);
if (!el) continue;
const value = el.getAttribute("content") ?? el.getAttribute("datetime");
if (value && value.trim()) return value.trim();
}
return null;
}
function extractTitle(document: Document): string | null {
const ogTitle = document.querySelector("meta[property='og:title']")?.getAttribute("content");
if (ogTitle && ogTitle.trim()) return ogTitle.trim();
const twitterTitle = document.querySelector("meta[name='twitter:title']")?.getAttribute("content");
if (twitterTitle && twitterTitle.trim()) return twitterTitle.trim();
const title = document.querySelector("title")?.textContent?.trim();
if (title) {
const cleaned = title.split(/\s*[-|–—]\s*/)[0]?.trim();
if (cleaned) return cleaned;
}
const h1 = document.querySelector("h1")?.textContent?.trim();
return h1 || null;
}
function extractMetadataFromHtml(html: string, url: string, capturedAt: string): PageMetadata {
const document = parseDocument(html);
const jsonLd = extractPrimaryJsonLdMeta(document);
const timeEl = document.querySelector("time[datetime]");
return {
url,
title: result.title || "",
description: result.description || undefined,
author: result.author || undefined,
published: result.published || undefined,
coverImage: result.image || undefined,
captured_at: new Date().toISOString(),
title:
pickString(
getMetaContent(document, ["og:title", "twitter:title"]),
jsonLd.title,
document.querySelector("h1")?.textContent,
document.title
) ?? "",
description:
pickString(
getMetaContent(document, ["description", "og:description", "twitter:description"]),
jsonLd.description
) ?? undefined,
author:
pickString(
getMetaContent(document, ["author", "article:author", "twitter:creator"]),
jsonLd.author
) ?? undefined,
published:
pickString(
timeEl?.getAttribute("datetime"),
getMetaContent(document, ["article:published_time", "datePublished", "publishdate", "date"]),
jsonLd.published,
extractPublishedTime(document)
) ?? undefined,
coverImage:
pickString(
getMetaContent(document, ["og:image", "twitter:image", "twitter:image:src"]),
jsonLd.coverImage
) ?? undefined,
captured_at: capturedAt,
};
}
return { metadata, markdown: result.content || "" };
function generateExcerpt(excerpt: string | null, textContent: string | null): string | null {
if (excerpt) return excerpt;
if (!textContent) return null;
const trimmed = textContent.trim();
if (!trimmed) return null;
return trimmed.length > 200 ? `${trimmed.slice(0, 200)}...` : trimmed;
}
function parseJsonLdItem(item: AnyRecord): ExtractionCandidate | null {
if (!isArticleType(item)) return null;
const rawContent =
(typeof item.articleBody === "string" && item.articleBody) ||
(typeof item.text === "string" && item.text) ||
(typeof item.description === "string" && item.description) ||
null;
if (!rawContent) return null;
const content = rawContent.trim();
const htmlLike = /<\/?[a-z][\s\S]*>/i.test(content);
const textContent = htmlLike ? extractTextFromHtml(content) : content;
if (textContent.length < MIN_CONTENT_LENGTH) return null;
return {
title: pickString(item.headline, item.name),
byline: extractAuthorFromJsonLd(item.author),
excerpt: pickString(item.description),
published: pickString(item.datePublished, item.dateCreated),
html: htmlLike ? content : null,
textContent,
method: "json-ld",
};
}
function tryJsonLdExtraction(document: Document): ExtractionCandidate | null {
for (const item of parseJsonLdScripts(document)) {
const extracted = parseJsonLdItem(item);
if (extracted) return extracted;
}
return null;
}
function getByPath(value: unknown, path: string): unknown {
let current = value;
for (const part of path.split(".")) {
if (!current || typeof current !== "object") return undefined;
current = (current as AnyRecord)[part];
}
return current;
}
function isContentBlockArray(value: unknown): value is AnyRecord[] {
if (!Array.isArray(value) || value.length === 0) return false;
return value.slice(0, 5).some((item) => {
if (!item || typeof item !== "object") return false;
const obj = item as AnyRecord;
return "type" in obj || "text" in obj || "textHtml" in obj || "content" in obj;
});
}
function extractTextFromContentBlocks(blocks: AnyRecord[]): string {
const parts: string[] = [];
function pushParagraph(text: string): void {
const trimmed = text.trim();
if (!trimmed) return;
parts.push(trimmed, "\n\n");
}
function walk(node: unknown): void {
if (!node || typeof node !== "object") return;
const block = node as AnyRecord;
if (typeof block.text === "string") {
pushParagraph(block.text);
return;
}
if (typeof block.textHtml === "string") {
pushParagraph(extractTextFromHtml(block.textHtml));
return;
}
if (Array.isArray(block.items)) {
for (const item of block.items) {
if (item && typeof item === "object") {
const text = pickString((item as AnyRecord).text);
if (text) parts.push(`- ${text}\n`);
}
}
parts.push("\n");
}
if (Array.isArray(block.components)) {
for (const component of block.components) {
walk(component);
}
}
if (Array.isArray(block.content)) {
for (const child of block.content) {
walk(child);
}
}
}
for (const block of blocks) {
walk(block);
}
return parts.join("").replace(/\n{3,}/g, "\n\n").trim();
}
function tryStringBodyExtraction(
content: string,
meta: AnyRecord,
document: Document,
method: string
): ExtractionCandidate | null {
if (!content || content.length < MIN_CONTENT_LENGTH) return null;
const isHtml = /<\/?[a-z][\s\S]*>/i.test(content);
const html = isHtml ? sanitizeHtml(content) : null;
const textContent = isHtml ? extractTextFromHtml(html) : content.trim();
if (textContent.length < MIN_CONTENT_LENGTH) return null;
return {
title: pickString(meta.headline, meta.title, extractTitle(document)),
byline: pickString(meta.byline, meta.author),
excerpt: pickString(meta.description, meta.excerpt, generateExcerpt(null, textContent)),
published: pickString(meta.datePublished, meta.publishedAt, extractPublishedTime(document)),
html,
textContent,
method,
};
}
function tryNextDataExtraction(document: Document): ExtractionCandidate | null {
try {
const script = document.querySelector("script#__NEXT_DATA__");
if (!script?.textContent) return null;
const data = JSON.parse(script.textContent) as AnyRecord;
const pageProps = (getByPath(data, "props.pageProps") ?? {}) as AnyRecord;
for (const path of NEXT_DATA_CONTENT_PATHS) {
const value = getByPath(data, path);
if (typeof value === "string") {
const parentPath = path.split(".").slice(0, -1).join(".");
const parent = (getByPath(data, parentPath) ?? {}) as AnyRecord;
const meta = {
...pageProps,
...parent,
title: parent.title ?? (pageProps.title as string | undefined),
};
const candidate = tryStringBodyExtraction(value, meta, document, "next-data");
if (candidate) return candidate;
}
if (isContentBlockArray(value)) {
const textContent = extractTextFromContentBlocks(value);
if (textContent.length < MIN_CONTENT_LENGTH) continue;
return {
title: pickString(
getByPath(data, "props.pageProps.content.headline"),
getByPath(data, "props.pageProps.article.headline"),
getByPath(data, "props.pageProps.article.title"),
getByPath(data, "props.pageProps.post.title"),
pageProps.title,
extractTitle(document)
),
byline: pickString(
getByPath(data, "props.pageProps.author.name"),
getByPath(data, "props.pageProps.article.author.name")
),
excerpt: pickString(
getByPath(data, "props.pageProps.content.description"),
getByPath(data, "props.pageProps.article.description"),
pageProps.description,
generateExcerpt(null, textContent)
),
published: pickString(
getByPath(data, "props.pageProps.content.datePublished"),
getByPath(data, "props.pageProps.article.datePublished"),
getByPath(data, "props.pageProps.publishedAt"),
extractPublishedTime(document)
),
html: null,
textContent,
method: "next-data",
};
}
}
} catch {
return null;
}
return null;
}
function buildReadabilityCandidate(
article: ReturnType<Readability["parse"]>,
document: Document,
method: string
): ExtractionCandidate | null {
const textContent = article?.textContent?.trim() ?? "";
if (textContent.length < MIN_CONTENT_LENGTH) return null;
return {
title: pickString(article?.title, extractTitle(document)),
byline: pickString((article as { byline?: string } | null)?.byline),
excerpt: pickString(article?.excerpt, generateExcerpt(null, textContent)),
published: pickString((article as { publishedTime?: string } | null)?.publishedTime, extractPublishedTime(document)),
html: article?.content ? sanitizeHtml(article.content) : null,
textContent,
method,
};
}
function tryReadability(document: Document): ExtractionCandidate | null {
try {
const strictClone = document.cloneNode(true) as Document;
const strictResult = buildReadabilityCandidate(
new Readability(strictClone).parse(),
document,
"readability"
);
if (strictResult) return strictResult;
const relaxedClone = document.cloneNode(true) as Document;
return buildReadabilityCandidate(
new Readability(relaxedClone, { charThreshold: 120 }).parse(),
document,
"readability-relaxed"
);
} catch {
return null;
}
}
function trySelectorExtraction(document: Document): ExtractionCandidate | null {
for (const selector of CONTENT_SELECTORS) {
const element = document.querySelector(selector);
if (!element) continue;
const clone = element.cloneNode(true) as Element;
for (const removeSelector of REMOVE_SELECTORS) {
for (const node of clone.querySelectorAll(removeSelector)) {
node.remove();
}
}
const html = sanitizeHtml(clone.innerHTML);
const textContent = extractTextFromHtml(html);
if (textContent.length < MIN_CONTENT_LENGTH) continue;
return {
title: extractTitle(document),
byline: null,
excerpt: generateExcerpt(null, textContent),
published: extractPublishedTime(document),
html,
textContent,
method: `selector:${selector}`,
};
}
return null;
}
function tryBodyExtraction(document: Document): ExtractionCandidate | null {
const body = document.body;
if (!body) return null;
const clone = body.cloneNode(true) as Element;
for (const removeSelector of REMOVE_SELECTORS) {
for (const node of clone.querySelectorAll(removeSelector)) {
node.remove();
}
}
const html = sanitizeHtml(clone.innerHTML);
const textContent = extractTextFromHtml(html);
if (!textContent) return null;
return {
title: extractTitle(document),
byline: null,
excerpt: generateExcerpt(null, textContent),
published: extractPublishedTime(document),
html,
textContent,
method: "body-fallback",
};
}
function pickBestCandidate(candidates: ExtractionCandidate[]): ExtractionCandidate | null {
if (candidates.length === 0) return null;
const methodOrder = [
"readability",
"readability-relaxed",
"next-data",
"json-ld",
"selector:",
"body-fallback",
];
function methodRank(method: string): number {
const idx = methodOrder.findIndex((entry) =>
entry.endsWith(":") ? method.startsWith(entry) : method === entry
);
return idx === -1 ? methodOrder.length : idx;
}
const ranked = [...candidates].sort((a, b) => {
const rankA = methodRank(a.method);
const rankB = methodRank(b.method);
if (rankA !== rankB) return rankA - rankB;
return (b.textContent.length ?? 0) - (a.textContent.length ?? 0);
});
for (const candidate of ranked) {
if (candidate.textContent.length >= GOOD_CONTENT_LENGTH) {
return candidate;
}
}
for (const candidate of ranked) {
if (candidate.textContent.length >= MIN_CONTENT_LENGTH) {
return candidate;
}
}
return ranked[0];
}
function extractFromHtml(html: string): ExtractionCandidate | null {
const document = parseDocument(html);
const readabilityCandidate = tryReadability(document);
const nextDataCandidate = tryNextDataExtraction(document);
const jsonLdCandidate = tryJsonLdExtraction(document);
const selectorCandidate = trySelectorExtraction(document);
const bodyCandidate = tryBodyExtraction(document);
const candidates = [
readabilityCandidate,
nextDataCandidate,
jsonLdCandidate,
selectorCandidate,
bodyCandidate,
].filter((candidate): candidate is ExtractionCandidate => Boolean(candidate));
const winner = pickBestCandidate(candidates);
if (!winner) return null;
return {
...winner,
title: winner.title ?? extractTitle(document),
published: winner.published ?? extractPublishedTime(document),
excerpt: winner.excerpt ?? generateExcerpt(null, winner.textContent),
};
}
const turndown = new TurndownService({
headingStyle: "atx",
hr: "---",
bulletListMarker: "-",
codeBlockStyle: "fenced",
emDelimiter: "*",
strongDelimiter: "**",
linkStyle: "inlined",
});
turndown.use(gfm);
turndown.remove(["script", "style", "iframe", "noscript", "template", "svg", "path"]);
turndown.addRule("collapseFigure", {
filter: "figure",
replacement(content) {
return `\n\n${content.trim()}\n\n`;
},
});
turndown.addRule("dropInvisibleAnchors", {
filter(node) {
return node.nodeName === "A" && !(node as Element).textContent?.trim();
},
replacement() {
return "";
},
});
function convertHtmlToMarkdown(html: string): string {
if (!html || !html.trim()) return "";
try {
const sanitized = sanitizeHtml(html);
return turndown.turndown(sanitized);
} catch {
return "";
}
}
function fallbackPlainText(html: string): string {
const document = parseDocument(html);
for (const selector of ["script", "style", "noscript", "template", "iframe", "svg", "path"]) {
for (const el of document.querySelectorAll(selector)) {
el.remove();
}
}
const text = document.body?.textContent ?? document.documentElement?.textContent ?? "";
return normalizeMarkdown(text.replace(/\s+/g, " "));
}
function countBylines(markdown: string): number {
return (markdown.match(/(^|\n)By\s+/g) || []).length;
}
function countUsefulParagraphs(markdown: string): number {
const paragraphs = normalizeMarkdown(markdown).split(/\n{2,}/);
let count = 0;
for (const paragraph of paragraphs) {
const trimmed = paragraph.trim();
if (!trimmed) continue;
if (/^!?\[[^\]]*\]\([^)]+\)$/.test(trimmed)) continue;
if (/^#{1,6}\s+/.test(trimmed)) continue;
if ((trimmed.match(/\b[\p{L}\p{N}']+\b/gu) || []).length < 8) continue;
count++;
}
return count;
}
function countMarkerHits(markdown: string, markers: RegExp[]): number {
let hits = 0;
for (const marker of markers) {
if (marker.test(markdown)) hits++;
}
return hits;
}
function scoreMarkdownQuality(markdown: string): number {
const normalized = normalizeMarkdown(markdown);
const wordCount = (normalized.match(/\b[\p{L}\p{N}']+\b/gu) || []).length;
const usefulParagraphs = countUsefulParagraphs(normalized);
const headingCount = (normalized.match(/^#{1,6}\s+/gm) || []).length;
const markerHits = countMarkerHits(normalized, LOW_QUALITY_MARKERS);
const bylineCount = countBylines(normalized);
const staffCount = (normalized.match(/\bForbes Staff\b/gi) || []).length;
return (
Math.min(wordCount, 4000) +
usefulParagraphs * 40 +
headingCount * 10 -
markerHits * 180 -
Math.max(0, bylineCount - 1) * 120 -
Math.max(0, staffCount - 1) * 80
);
}
function shouldCompareWithLegacy(markdown: string): boolean {
const normalized = normalizeMarkdown(markdown);
return (
countMarkerHits(normalized, LOW_QUALITY_MARKERS) > 0 ||
countBylines(normalized) > 1 ||
countUsefulParagraphs(normalized) < 6
);
}
function isMarkdownUsable(markdown: string, html: string): boolean {
const normalized = normalizeMarkdown(markdown);
if (!normalized) return false;
const htmlTextLength = extractTextFromHtml(html).length;
if (htmlTextLength < MIN_CONTENT_LENGTH) return true;
if (normalized.length >= 80) return true;
return normalized.length >= Math.min(200, Math.floor(htmlTextLength * 0.2));
}
async function tryDefuddleConversion(
html: string,
url: string,
baseMetadata: PageMetadata
): Promise<{ ok: true; result: ConversionResult } | { ok: false; reason: string }> {
try {
const [{ JSDOM, VirtualConsole }, { Defuddle }] = await Promise.all([
import("jsdom"),
import("defuddle/node"),
]);
const virtualConsole = new VirtualConsole();
virtualConsole.on("jsdomError", (error: Error & { type?: string }) => {
if (error.type === "css parsing" || /Could not parse CSS stylesheet/i.test(error.message)) {
return;
}
console.warn(`[url-to-markdown] jsdom: ${error.message}`);
});
const dom = new JSDOM(html, { url, virtualConsole });
const result = await Defuddle(dom, url, { markdown: true });
const markdown = normalizeMarkdown(result.content || "");
if (!isMarkdownUsable(markdown, html)) {
return { ok: false, reason: "Defuddle returned empty or incomplete markdown" };
}
return {
ok: true,
result: {
metadata: {
...baseMetadata,
title: pickString(result.title, baseMetadata.title) ?? "",
description: pickString(result.description, baseMetadata.description) ?? undefined,
author: pickString(result.author, baseMetadata.author) ?? undefined,
published: pickString(result.published, baseMetadata.published) ?? undefined,
coverImage: pickString(result.image, baseMetadata.coverImage) ?? undefined,
},
markdown,
rawHtml: html,
conversionMethod: "defuddle",
},
};
} catch (error) {
return {
ok: false,
reason: error instanceof Error ? error.message : String(error),
};
}
}
function convertWithLegacyExtractor(html: string, baseMetadata: PageMetadata): ConversionResult {
const extracted = extractFromHtml(html);
let markdown = extracted?.html ? convertHtmlToMarkdown(extracted.html) : "";
if (!markdown.trim()) {
markdown = extracted?.textContent?.trim() || fallbackPlainText(html);
}
return {
metadata: {
...baseMetadata,
title: pickString(extracted?.title, baseMetadata.title) ?? "",
description: pickString(extracted?.excerpt, baseMetadata.description) ?? undefined,
author: pickString(extracted?.byline, baseMetadata.author) ?? undefined,
published: pickString(extracted?.published, baseMetadata.published) ?? undefined,
},
markdown: normalizeMarkdown(markdown),
rawHtml: html,
conversionMethod: extracted ? `legacy:${extracted.method}` : "legacy:plain-text",
};
}
export async function extractContent(html: string, url: string): Promise<ConversionResult> {
const capturedAt = new Date().toISOString();
const baseMetadata = extractMetadataFromHtml(html, url, capturedAt);
const defuddleResult = await tryDefuddleConversion(html, url, baseMetadata);
if (defuddleResult.ok) {
if (shouldCompareWithLegacy(defuddleResult.result.markdown)) {
const legacyResult = convertWithLegacyExtractor(html, baseMetadata);
const legacyScore = scoreMarkdownQuality(legacyResult.markdown);
const defuddleScore = scoreMarkdownQuality(defuddleResult.result.markdown);
if (legacyScore > defuddleScore + 120) {
return {
...legacyResult,
fallbackReason: "Legacy extractor produced higher-quality markdown than Defuddle",
};
}
}
return defuddleResult.result;
}
const fallbackResult = convertWithLegacyExtractor(html, baseMetadata);
return {
...fallbackResult,
fallbackReason: defuddleResult.reason,
};
}
function escapeYamlValue(value: string): string {
+14 -1
View File
@@ -69,6 +69,12 @@ function formatTimestamp(): string {
return `${now.getFullYear()}${pad(now.getMonth() + 1)}${pad(now.getDate())}-${pad(now.getHours())}${pad(now.getMinutes())}${pad(now.getSeconds())}`;
}
function deriveHtmlSnapshotPath(markdownPath: string): string {
const parsed = path.parse(markdownPath);
const basename = parsed.ext ? parsed.name : parsed.base;
return path.join(parsed.dir, `${basename}-captured.html`);
}
async function generateOutputPath(url: string, title: string, outputDir?: string): Promise<string> {
const domain = new URL(url).hostname.replace(/^www\./, "");
const slug = generateSlug(title, url);
@@ -141,7 +147,7 @@ async function captureUrl(args: Args): Promise<ConversionResult> {
async function main(): Promise<void> {
const args = parseArgs(process.argv);
if (!args.url) {
console.error("Usage: bun main.ts <url> [-o output.md] [--wait] [--timeout ms]");
console.error("Usage: bun main.ts <url> [-o output.md] [--output-dir dir] [--wait] [--timeout ms] [--download-media]");
process.exit(1);
}
@@ -166,7 +172,9 @@ async function main(): Promise<void> {
const result = await captureUrl(args);
const outputPath = args.output || await generateOutputPath(args.url, result.metadata.title, args.outputDir);
const outputDir = path.dirname(outputPath);
const htmlSnapshotPath = deriveHtmlSnapshotPath(outputPath);
await mkdir(outputDir, { recursive: true });
await writeFile(htmlSnapshotPath, result.rawHtml, "utf-8");
let document = createMarkdownDocument(result);
@@ -189,7 +197,12 @@ async function main(): Promise<void> {
await writeFile(outputPath, document, "utf-8");
console.log(`Saved: ${outputPath}`);
console.log(`Saved HTML: ${htmlSnapshotPath}`);
console.log(`Title: ${result.metadata.title || "(no title)"}`);
console.log(`Converter: ${result.conversionMethod}`);
if (result.fallbackReason) {
console.warn(`Fallback used: ${result.fallbackReason}`);
}
}
main().catch((err) => {
@@ -0,0 +1,13 @@
{
"name": "baoyu-url-to-markdown-scripts",
"private": true,
"type": "module",
"dependencies": {
"@mozilla/readability": "^0.6.0",
"defuddle": "^0.10.0",
"jsdom": "^24.1.3",
"linkedom": "^0.18.12",
"turndown": "^7.2.2",
"turndown-plugin-gfm": "^1.0.2"
}
}