feat: add og image

astro.config.mjs

@@ -1,15 +1,15 @@
-import { defineConfig } from 'astro/config'
-import mdx from '@astrojs/mdx'
-import tailwind from '@astrojs/tailwind'
-import sitemap from '@astrojs/sitemap'
-import { remarkReadingTime } from './src/utils/remarkReadingTime.ts'
-import remarkUnwrapImages from 'remark-unwrap-images'
-import rehypeExternalLinks from 'rehype-external-links'
-import expressiveCode from 'astro-expressive-code'
-import { expressiveCodeOptions } from './src/site.config'
-import icon from 'astro-icon'
-import react from '@astrojs/react'
 import cloudflare from '@astrojs/cloudflare'
+import mdx from '@astrojs/mdx'
+import react from '@astrojs/react'
+import sitemap from '@astrojs/sitemap'
+import tailwind from '@astrojs/tailwind'
+import expressiveCode from 'astro-expressive-code'
+import icon from 'astro-icon'
+import { defineConfig } from 'astro/config'
+import rehypeExternalLinks from 'rehype-external-links'
+import remarkUnwrapImages from 'remark-unwrap-images'
+import { expressiveCodeOptions } from './src/site.config'
+import { remarkReadingTime } from './src/utils/remarkReadingTime.ts'
 
 // https://astro.build/config
 export default defineConfig({
@@ -79,5 +79,28 @@ export default defineConfig({
 			}
 		}
 	},
-	prefetch: true
+	prefetch: true,
+	vite: {
+		optimizeDeps: {
+			exclude: ['@resvg/resvg-js']
+		},
+		plugins: [tailwind(), rawFonts([".ttf", ".woff"])],
+	},
 })
+
+
+function rawFonts(ext) {
+	return {
+		name: "vite-plugin-raw-fonts",
+		// @ts-expect-error:next-line
+		transform(_, id) {
+			if (ext.some((e) => id.endsWith(e))) {
+				const buffer = fs.readFileSync(id);
+				return {
+					code: `export default ${JSON.stringify(buffer)}`,
+					map: null,
+				};
+			}
+		},
+	};
+}

package.json

@@ -27,6 +27,7 @@
 		"@astrojs/sitemap": "^3.1.1",
 		"@astrojs/tailwind": "^5.1.0",
 		"@giscus/react": "^3.0.0",
+		"@resvg/resvg-js": "^2.6.2",
 		"@types/react": "^18.3.11",
 		"@types/react-dom": "^18.3.0",
 		"astro": "^4.4.15",
@@ -46,6 +47,8 @@
 		"rehype-external-links": "^3.0.0",
 		"remark-unwrap-images": "^4.0.0",
 		"sanitize-html": "^2.13.1",
+		"satori": "^0.12.1",
+		"satori-html": "^0.3.2",
 		"sharp": "^0.33.2",
 		"tailwind-merge": "^2.2.1",
 		"tailwindcss": "^3.4.1",

src/components/FormattedDate.astro

@@ -3,29 +3,13 @@ import type { HTMLAttributes } from 'astro/types'
 
 interface Props extends HTMLAttributes<'time'> {
 	date: Date
-	coverImage: string
 }
 
-const { date, coverImage: coverImage, ...attrs } = Astro.props
+const { date, ...attrs } = Astro.props
-console.log('coverImage', coverImage)
 
 const formattedDate = date.toISOString().slice(0, 10).replace(/-/g, '')
 ---
 
-{
-	coverImage ? (
-		<div class='relative'>
 <time datetime={date.toISOString()} {...attrs}>
 	{formattedDate}
 </time>
-			<img
-				src={coverImage}
-				class='absolute left-0 top-0 -z-10 h-full w-full object-cover opacity-10'
-			/>
-		</div>
-	) : (
-		<time datetime={date.toISOString()} {...attrs}>
-			{formattedDate}
-		</time>
-	)
-}

src/components/blog/Hero.astro

@@ -8,25 +8,22 @@ import Label from '../Label.astro'
 interface Props {
 	content: CollectionEntry<'post'>
 	simple?: boolean
+	socialImage?: string
 }
 
 const {
 	content: { data, render },
-	simple = false
+	simple = false,
+	socialImage
 } = Astro.props
-
 const { remarkPluginFrontmatter } = await render()
-
-const dateTimeOptions: Intl.DateTimeFormatOptions = {
-	month: 'long'
-}
 ---
 
 {
-	data.coverImage && (
+	socialImage && (
-		<div class='aspect-h-9 aspect-w-16 mb-6'>
+		<div class='mb-6'>
 			<img
-				src={data.coverImage}
+				src={socialImage}
 				class='rounded-2xl object-cover'
 				fetchpriority='high'
 				loading='eager'
@@ -34,11 +31,12 @@ const dateTimeOptions: Intl.DateTimeFormatOptions = {
 		</div>
 	)
 }
+
 {data.draft ? <span class='text-red-500'>(Draft)</span> : null}
 
 <div class='flex flex-wrap items-center gap-x-3 gap-y-2'>
 	<p class='text-xs'>
-		<FormattedDate date={data.date} dateTimeOptions={dateTimeOptions} /> /{' '}
+		<FormattedDate date={data.date} /> /{' '}
 		{remarkPluginFrontmatter.minutesRead}
 	</p>
 	{
@@ -106,12 +104,3 @@ const dateTimeOptions: Intl.DateTimeFormatOptions = {
 		</Card>
 	)
 }
-
-<!-- {
-	data.date && (
-		<p class='mt-6 text-base'>
-			Last Updated:
-			<FormattedDate class='ms-1' date={data.date} dateTimeOptions={dateTimeOptions} />
-		</p>
-	)
-} -->

src/components/blog/PostPreview.astro

@@ -19,7 +19,7 @@ const coverImage = post.data.coverImage
 
 {showYear && <h2 class='my-2 text-xl font-semibold'>{year}</h2>}
 <li class='flex flex-col gap-2 sm:flex-row sm:gap-x-4 [&_q]:basis-full'>
-	<FormattedDate class='min-w-[80px]' date={postDate} coverImage={coverImage} />
+	<FormattedDate class='min-w-[80px]' date={postDate} />
 
 	<Tag>
 		{post.data.draft && <span class='text-red-500'>(Draft) </span>}

src/layouts/BlogPost.astro

@@ -15,10 +15,11 @@ interface Props {
 
 const { post, simple = false, backHref = '/blog' } = Astro.props
 const {
-	data: { description, ogImage, title, date }
+	data: { description, ogImage, title, date },
+	slug
 } = post
 
-const socialImage = ogImage
+const socialImage = ogImage ? ogImage : `/og-image/${slug}.png`
 const articleDate = date?.toISOString()
 const { headings } = await post.render()
 ---
@@ -51,7 +52,7 @@ const { headings } = await post.render()
 			{!!headings.length && <TOC headings={headings} />}
 			<article class='flex-1 flex-grow break-words' data-pagefind-body>
 				<div id='blog-hero'>
-					<BlogHero content={post} simple={simple} />
+					<BlogHero content={post} simple={simple} socialImage={socialImage} />
 				</div>
 				<div
 					id='blog-gallery'

src/pages/og-image/[...slug].png.ts

@@ -0,0 +1,88 @@
+import NotoSansSC from "@/assets/NotoSansHans-Regular-2.ttf";
+import RobotoMonoBold from "@/assets/roboto-mono-700.ttf";
+import RobotoMono from "@/assets/roboto-mono-regular.ttf";
+import { siteConfig } from "@/site-config";
+
+import { Resvg } from "@resvg/resvg-js";
+import type { APIContext, InferGetStaticPropsType } from "astro";
+import satori, { type SatoriOptions } from "satori";
+import { html } from "satori-html";
+import { getSortedAllPostsAndDiaries } from "src/utils/post";
+
+const ogOptions: SatoriOptions = {
+    // debug: true,
+    fonts: [
+        {
+            data: Buffer.from(RobotoMono),
+            name: "Roboto Mono",
+            style: "normal",
+            weight: 400,
+        },
+        {
+            data: Buffer.from(RobotoMonoBold),
+            name: "Roboto Mono",
+            style: "normal",
+            weight: 700,
+        },
+        {
+            data: Buffer.from(NotoSansSC),
+            name: "Noto Sans SC",
+            style: "normal",
+            weight: 400,
+        },
+    ],
+    height: 630,
+    width: 1200,
+};
+
+const markup = (title: string, pubDate: string) =>
+    html`<div tw="flex flex-col w-full h-full bg-[#1d1f21] text-[#c9cacc] font-['Noto Sans SC']">
+		<div tw="flex flex-col flex-1 w-full p-10 justify-center">
+			<p tw="text-2xl mb-6">${pubDate}</p>
+			<h1 tw="text-6xl font-bold leading-snug text-white">${title}</h1>
+		</div>
+		<div tw="flex items-center justify-between w-full p-10 border-t border-[#2bbc89] text-xl">
+			<div tw="flex items-center">
+				<img tw="w-14 h-14 rounded-full" src="https://pictures.kazoottt.top/2025/01/20250130-121E9E4A-39FB-46DD-8D64-EAA3C77C6503.jpeg" alt="avatar" />
+				<p tw="ml-3 font-semibold">${siteConfig.title}</p>
+			</div>
+			<p>by ${siteConfig.author}</p>
+		</div>
+	</div>`;
+
+type Props = InferGetStaticPropsType<typeof getStaticPaths>;
+
+export async function GET(context: APIContext) {
+    const { pubDate, title } = context.props as Props;
+    console.log("context.props", context.props)
+    const postDate = pubDate instanceof Date
+        ? pubDate.toLocaleDateString('zh-CN', {
+            year: 'numeric',
+            month: 'long',
+            day: 'numeric'
+        })
+        : pubDate;
+
+    const htmlElement = markup(title, postDate);
+    const svg = await satori(htmlElement, ogOptions);
+    const png = new Resvg(svg).render().asPng();
+    return new Response(png, {
+        headers: {
+            "Cache-Control": "public, max-age=31536000, immutable",
+            "Content-Type": "image/png",
+        },
+    });
+}
+
+export async function getStaticPaths() {
+    const posts = await getSortedAllPostsAndDiaries();
+    return posts
+        .filter(({ data }) => !data.ogImage)
+        .map((post) => ({
+            params: { slug: post.id },
+            props: {
+                pubDate: post.data?.date,
+                title: post.data.title,
+            },
+        }));
+}

tailwind.config.js

@@ -60,7 +60,7 @@ const config = {
 			},
 			fontFamily: {
 				sans: [...fontFamily.sans],
-				satoshi: ['Satoshi', 'sans']
+				satoshi: ['Satoshi', 'sans', 'Noto Sans SC']
 			}
 		}
 	}