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fix: add an option to disable dynamic OG image generation (#476)

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* fix: add an option to disable dynamic OG image generation

Add new `dynamicOgImage` option in the `SITE` object inside 
`src/config.ts` file to disable auto og-image generation during build.

Resolves #428

* docs: update guides for `SITE.dynamicOgImage` option
This commit is contained in:
Sat Naing
2025-03-12 20:47:12 +07:00
committed by GitHub
parent dc5ca47b1d
commit 6749f62015
6 changed files with 70 additions and 29 deletions
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src/config.ts
+1
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@@ -16,4 +16,5 @@ export const SITE = {
text: "Suggest Changes",
appendFilePath: true,
},
dynamicOgImage: true,
} as const;
src/data/blog/dynamic-og-images.md
+9
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@@ -1,6 +1,7 @@
---
author: Sat Naing
pubDatetime: 2022-12-28T04:59:04.866Z
modDatetime: 2025-03-12T13:39:20.763Z
title: Dynamic OG image generation in AstroPaper blog posts
slug: dynamic-og-image-generation-in-astropaper-blog-posts
featured: false
@@ -80,6 +81,14 @@ async function loadGoogleFonts(
> Check out [this PR](https://github.com/satnaing/astro-paper/pull/318) for more info.
## Trade-off
While this is a nice feature to have, there's a trade-off. Each OG image takes roughly one second to generate. This might not be noticeable at first, but as the number of blog posts grows, you might want to disable this feature. Since every OG image takes time to generate, having many of them will increase the build time linearly.
For example: If one OG image takes one second to generate, then 60 images will take around one minute, and 600 images will take approximately 10 minutes. This can significantly impact build times as your content scales.
Related issue: [#428](https://github.com/satnaing/astro-paper/issues/428)
## Limitations
At the time of writing this, [Satori](https://github.com/vercel/satori) is fairly new and has not reached major release yet. So, there are still some limitations to this dynamic OG image feature.
src/data/blog/how-to-configure-astropaper-theme.md
+4 -2
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@@ -1,7 +1,7 @@
---
author: Sat Naing
pubDatetime: 2022-09-23T04:58:53Z
modDatetime: 2025-03-07T14:01:26.494Z
modDatetime: 2025-03-12T13:39:39.057Z
title: How to configure AstroPaper theme
slug: how-to-configure-astropaper-theme
featured: true
@@ -42,13 +42,14 @@ export const SITE = {
text: "Suggest Changes",
appendFilePath: true,
},
dynamicOgImage: true, // enable automatic dynamic og-image generation
} as const;
```
Here are SITE configuration options
| Options | Description |
| --------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| --------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `website` | Your deployed website URL |
| `author` | Your name |
| `profile` | Your personal/portfolio website URL which is used for better SEO. Put `null` or empty string `""` if you don't have any. |
@@ -62,6 +63,7 @@ Here are SITE configuration options
| `showArchives` | Determines whether to display the `Archives` menu (positioned between the `About` and `Search` menus) and its corresponding page on the site. This option is set to `true` by default. |
| `showBackButton` | Determines whether to display the `Go back` button in each blog post. |
| `editPost` | This option allows users to suggest changes to a blog post by providing an edit link under blog post titles. This feature can be disabled by removing it from the `SITE` config. You can also set `appendFilePath` to `true` to automatically append the file path of the post to the url, directing users to the specific post they wish to edit. |
| `dynamicOgImage` | This option controls whether to [generate dynamic og-image](https://astro-paper.pages.dev/posts/dynamic-og-image-generation-in-astropaper-blog-posts/) if no `ogImage` is specified in the blog post frontmatter. If you have many blog posts, you might want to disable this feature. See the [trade-off](https://astro-paper.pages.dev/posts/dynamic-og-image-generation-in-astropaper-blog-posts/#trade-off) for more details. |
## Configuring locale
src/layouts/Layout.astro
+2 -2
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@@ -23,14 +23,14 @@ const {
author = SITE.author,
profile = SITE.profile,
description = SITE.desc,
ogImage = SITE.ogImage,
ogImage = SITE.ogImage ? `/${SITE.ogImage}` : "/og.png",
canonicalURL = new URL(Astro.url.pathname, Astro.url),
pubDatetime,
modDatetime,
scrollSmooth = false,
} = Astro.props;
const socialImageURL = new URL(ogImage ?? SITE.ogImage ?? "og.png", Astro.url);
const socialImageURL = new URL(ogImage, Astro.url);
const structuredData = {
"@context": "https://schema.org",
src/layouts/PostDetails.astro
+20 -7
View File
@@ -24,7 +24,7 @@ const {
title,
author,
description,
ogImage,
ogImage: initOgImage,
canonicalURL,
pubDatetime,
modDatetime,
@@ -34,11 +34,24 @@ const {
const { Content } = await render(post);
const ogImageUrl = typeof ogImage === "string" ? ogImage : ogImage?.src;
const ogUrl = new URL(
ogImageUrl ?? `/posts/${slugifyStr(title)}/index.png`,
Astro.url.origin
).href;
let ogImageUrl: string | undefined;
// Determine OG image source
if (typeof initOgImage === "string") {
ogImageUrl = initOgImage; // Remote OG image (absolute URL)
} else if (initOgImage?.src) {
ogImageUrl = initOgImage.src; // Local asset
}
// Use dynamic OG image if enabled and no remote|local ogImage
if (!ogImageUrl && SITE.dynamicOgImage) {
ogImageUrl = `/posts/${slugifyStr(title)}/index.png`;
}
// Resolve OG image URL (or fallback to SITE.ogImage / default `og.png`)
const ogImage = ogImageUrl
? new URL(ogImageUrl, Astro.url.origin).href
: undefined;
const layoutProps = {
title: `${title} | ${SITE.title}`,
@@ -47,7 +60,7 @@ const layoutProps = {
pubDatetime,
modDatetime,
canonicalURL,
ogImage: ogUrl,
ogImage,
scrollSmooth: true,
};
src/pages/posts/[slug]/index.png.ts
+19 -3
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@@ -2,8 +2,13 @@ import type { APIRoute } from "astro";
import { getCollection, type CollectionEntry } from "astro:content";
import { generateOgImageForPost } from "@/utils/generateOgImages";
import { slugifyStr } from "@/utils/slugify";
import { SITE } from "@/config";
export async function getStaticPaths() {
if (!SITE.dynamicOgImage) {
return [];
}
const posts = await getCollection("blog").then(p =>
p.filter(({ data }) => !data.draft && !data.ogImage)
);
@@ -14,7 +19,18 @@ export async function getStaticPaths() {
}));
}
export const GET: APIRoute = async ({ props }) =>
new Response(await generateOgImageForPost(props as CollectionEntry<"blog">), {
headers: { "Content-Type": "image/png" },
export const GET: APIRoute = async ({ props }) => {
if (!SITE.dynamicOgImage) {
return new Response(null, {
status: 404,
statusText: "Not found",
});
}
return new Response(
await generateOgImageForPost(props as CollectionEntry<"blog">),
{
headers: { "Content-Type": "image/png" },
}
);
};