使用新版 RSS 构建器

https://billyle.dev/posts/adding-rss-feed-content-and-fixing-markdown-image-paths-in-astro

https://github.com/afoim/fuwari/blob/main/src/pages/rss.xml.ts

package.json

@@ -41,6 +41,7 @@
     "katex": "^0.16.22",
     "markdown-it": "^14.1.0",
     "mdast-util-to-string": "^4.0.0",
+    "node-html-parser": "^7.0.1",
     "overlayscrollbars": "^2.11.4",
     "pagefind": "^1.3.0",
     "photoswipe": "^5.4.4",

pnpm-lock.yaml

@@ -83,6 +83,9 @@ importers:
       mdast-util-to-string:
         specifier: ^4.0.0
         version: 4.0.0
+      node-html-parser:
+        specifier: ^7.0.1
+        version: 7.0.1
       overlayscrollbars:
         specifier: ^2.11.4
         version: 2.11.4
@@ -2353,10 +2356,6 @@ packages:
     resolution: {integrity: sha512-0eW44TGN5SQXU1mWSkKwFstI/22X2bG1nYzZTYMAWjylYURhse752YgbE4Cx46AC+bAvI+/dYTPRk1LqSUnu6w==}
     engines: {node: ^10 || ^12.20.0 || ^14.13.0 || >=15.0.0}
 
-  css-what@6.1.0:
-    resolution: {integrity: sha512-HTUrgRJ7r4dsZKU6GjmpfRK1O76h97Z8MfS1G0FozR+oF2kG6Vfe8JE6zwrkbxigziPHinCJ+gCPjA9EaBDtRw==}
-    engines: {node: '>= 6'}
-
   css-what@6.2.2:
     resolution: {integrity: sha512-u/O3vwbptzhMs3L1fQE82ZSLHQQfto5gyZzwteVIEyeaY5Fc7R4dapF/BvRoSYFeqfBk4m0V1Vafq5Pjv25wvA==}
     engines: {node: '>= 6'}
@@ -2951,6 +2950,10 @@ packages:
   hastscript@9.0.1:
     resolution: {integrity: sha512-g7df9rMFX/SPi34tyGCyUBREQoKkapwdY/T04Qn9TDWfHhAYt4/I0gMVirzK5wEzeUqIjEB+LXC/ypb7Aqno5w==}
 
+  he@1.2.0:
+    resolution: {integrity: sha512-F/1DnUGPopORZi0ni+CvrCgHQ5FyEAHRLSApuYWMmrbSwoN2Mn/7k+Gl38gJnR7yyDZk6WLXwiGod1JOWNDKGw==}
+    hasBin: true
+
   html-escaper@3.0.3:
     resolution: {integrity: sha512-RuMffC89BOWQoY0WKGpIhn5gX3iI54O6nRA0yC124NYVtzjmFWBIiFd8M0x+ZdX0P9R4lADg1mgP8C7PxGOWuQ==}
 
@@ -3678,6 +3681,9 @@ packages:
       encoding:
         optional: true
 
+  node-html-parser@7.0.1:
+    resolution: {integrity: sha512-KGtmPY2kS0thCWGK0VuPyOS+pBKhhe8gXztzA2ilAOhbUbxa9homF1bOyKvhGzMLXUoRds9IOmr/v5lr/lqNmA==}
+
   node-mock-http@1.0.2:
     resolution: {integrity: sha512-zWaamgDUdo9SSLw47we78+zYw/bDr5gH8pH7oRRs8V3KmBtu8GLgGIbV2p/gRPd3LWpEOpjQj7X1FOU3VFMJ8g==}
 
@@ -7628,7 +7634,7 @@ snapshots:
     dependencies:
       boolbase: 1.0.0
       css-select: 5.1.0
-      css-what: 6.1.0
+      css-what: 6.2.2
       domelementtype: 2.3.0
       domhandler: 5.0.3
       domutils: 3.2.2
@@ -7774,7 +7780,7 @@ snapshots:
   css-select@5.1.0:
     dependencies:
       boolbase: 1.0.0
-      css-what: 6.1.0
+      css-what: 6.2.2
       domhandler: 5.0.3
       domutils: 3.2.2
       nth-check: 2.1.1
@@ -7801,8 +7807,6 @@ snapshots:
       mdn-data: 2.12.2
       source-map-js: 1.2.1
 
-  css-what@6.1.0: {}
-
   css-what@6.2.2: {}
 
   cssesc@3.0.0: {}
@@ -8582,6 +8586,8 @@ snapshots:
       property-information: 7.0.0
       space-separated-tokens: 2.0.2
 
+  he@1.2.0: {}
+
   html-escaper@3.0.3: {}
 
   html-void-elements@3.0.0: {}
@@ -9513,6 +9519,11 @@ snapshots:
     dependencies:
       whatwg-url: 5.0.0
 
+  node-html-parser@7.0.1:
+    dependencies:
+      css-select: 5.1.0
+      he: 1.2.0
+
   node-mock-http@1.0.2: {}
 
   node-releases@2.0.19: {}
@@ -10781,7 +10792,7 @@ snapshots:
       commander: 7.2.0
       css-select: 5.1.0
       css-tree: 2.3.1
-      css-what: 6.1.0
+      css-what: 6.2.2
       csso: 5.0.5
       picocolors: 1.1.1
 

src/pages/rss.xml.ts

@@ -1,43 +1,84 @@
-import rss from "@astrojs/rss";
-import { getSortedPosts } from "@utils/content-utils";
-import { url } from "@utils/url-utils";
-import type { APIContext } from "astro";
-import MarkdownIt from "markdown-it";
-import sanitizeHtml from "sanitize-html";
-import { siteConfig } from "@/config";
+import rss from '@astrojs/rss';
+import sanitizeHtml from 'sanitize-html';
+import MarkdownIt from 'markdown-it';
+import { getCollection } from 'astro:content';
+import { siteConfig } from '@/config';
+import { parse as htmlParser } from 'node-html-parser';
+import { getImage } from 'astro:assets';
+import type { APIContext, ImageMetadata } from 'astro';
+import type { RSSFeedItem } from '@astrojs/rss';
+import { getSortedPosts } from '@/utils/content-utils';
 
-const parser = new MarkdownIt();
+const markdownParser = new MarkdownIt();
 
-function stripInvalidXmlChars(str: string): string {
-	return str.replace(
-		// biome-ignore lint/suspicious/noControlCharactersInRegex: https://www.w3.org/TR/xml/#charsets
-		/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x9F\uFDD0-\uFDEF\uFFFE\uFFFF]/g,
-		"",
-	);
-}
+// get dynamic import of images as a map collection
+const imagesGlob = import.meta.glob<{ default: ImageMetadata }>(
+	'/src/content/**/*.{jpeg,jpg,png,gif,webp}', // include posts and assets
+);
 
 export async function GET(context: APIContext) {
-	const blog = await getSortedPosts();
+	if (!context.site) {
+		throw Error('site not set');
+	}
+
+	// Use the same ordering as site listing (pinned first, then by published desc)
+	const posts = await getSortedPosts();
+	const feed: RSSFeedItem[] = [];
+
+	for (const post of posts) {
+		// convert markdown to html string
+		const body = markdownParser.render(post.body);
+		// convert html string to DOM-like structure
+		const html = htmlParser.parse(body);
+		// hold all img tags in variable images
+		const images = html.querySelectorAll('img');
+
+		for (const img of images) {
+			const src = img.getAttribute('src');
+			if (!src) continue;
+
+			// Handle content-relative images and convert them to built _astro paths
+			if (src.startsWith('./') || src.startsWith('../')) {
+				let importPath: string | null = null;
+
+				if (src.startsWith('./')) {
+					// Path relative to the post file directory
+					const prefixRemoved = src.slice(2);
+					importPath = `/src/content/posts/${prefixRemoved}`;
+				} else {
+					// Path like ../assets/images/xxx -> relative to /src/content/
+					const cleaned = src.replace(/^\.\.\//, '');
+					importPath = `/src/content/${cleaned}`;
+				}
+
+				const imageMod = await imagesGlob[importPath]?.()?.then((res) => res.default);
+				if (imageMod) {
+					const optimizedImg = await getImage({ src: imageMod });
+					img.setAttribute('src', new URL(optimizedImg.src, context.site).href);
+				}
+			} else if (src.startsWith('/')) {
+				// images starting with `/` are in public dir
+				img.setAttribute('src', new URL(src, context.site).href);
+			}
+		}
+
+		feed.push({
+			title: post.data.title,
+			description: post.data.description,
+			pubDate: post.data.published,
+			link: `/posts/${post.slug}/`,
+			// sanitize the new html string with corrected image paths
+			content: sanitizeHtml(html.toString(), {
+				allowedTags: sanitizeHtml.defaults.allowedTags.concat(['img']),
+			}),
+		});
+	}
 
 	return rss({
 		title: siteConfig.title,
-		description: siteConfig.subtitle || "No description",
-		site: context.site ?? "https://fuwari.vercel.app",
-		items: blog.map((post) => {
-			const content =
-				typeof post.body === "string" ? post.body : String(post.body || "");
-			const cleanedContent = stripInvalidXmlChars(content);
-			return {
-				title: post.data.title,
-				pubDate: post.data.published,
-				description: post.data.description || "",
-				link: url(`/posts/${post.slug}/`),
-				content: sanitizeHtml(parser.render(cleanedContent), {
-					allowedTags: sanitizeHtml.defaults.allowedTags.concat(["img"]),
-				}),
-			};
-		}),
-		
+		description: siteConfig.subtitle || 'No description',
+		site: context.site,
+		items: feed,
 		// 准备迎接我的 Folo 之验证吧！——鲁迅 not 达摩（bushi
 		customData: `<language>${siteConfig.lang}</language><follow_challenge><feedId>177350379949135872</feedId><userId>83370505718413312</userId></follow_challenge>`,
 	});