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feat: use lightweight og image generator
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| import { addServerHandler, createResolver, defineNuxtModule } from 'nuxt/kit' | ||
|
|
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| export default defineNuxtModule({ | ||
| setup(_, nuxt) { | ||
| if (nuxt.options._prepare) { | ||
| return | ||
| } | ||
| const resolver = createResolver(import.meta.url) | ||
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|
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| addServerHandler({ | ||
| route: '/_og/**', | ||
| handler: resolver.resolve('./runtime/handler'), | ||
| }) | ||
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| nuxt.options.nitro.serverAssets ??= [] | ||
| nuxt.options.nitro.serverAssets.push({ | ||
| baseName: 'og-image', | ||
| dir: resolver.resolve('./runtime/assets'), | ||
| }) | ||
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|
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| nuxt.hook('nitro:init', (nitro) => { | ||
| nitro.hooks.hook('prerender:generate', (route) => { | ||
| if (route.route.startsWith('/_og/')) { | ||
| // temp patch for nitro prerenderer | ||
| route.route = route.route.split('?')[0] | ||
| route.fileName = route.fileName.split('?')[0] | ||
| } | ||
| }) | ||
| }) | ||
| }, | ||
| }) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| import { defineLazyEventHandler, setHeader, getQuery } from 'h3' | ||
| export default defineLazyEventHandler(async () => { | ||
| const { Resvg } = await import('@resvg/resvg-js') | ||
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| // Read server assets | ||
| const nunito = await useStorage().getItemRaw('assets:og-image:nunito.ttf') | ||
| const svgTemplate = (await useStorage().getItem('assets:og-image:template.svg')) as string | ||
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| return defineEventHandler((event) => { | ||
| // Use this for HMR | ||
| // const svgTemplate = (await useStorage().getItem('assets:og-image:template.svg')) as string | ||
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| const { name = '', title = '', description = '' } = getQuery(event) as Record<string, string> | ||
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| const descriptionLines = _wrapLine(decodeURIComponent(description), 60) | ||
| const svg = svgTemplate | ||
| .replace('!name', decodeURIComponent(name)) | ||
| .replace('!title', decodeURIComponent(title)) | ||
| .replace('!description1', descriptionLines[0] || '') | ||
| .replace('!description2', descriptionLines[1] || '') | ||
| .replace('!description3', descriptionLines[2] || '') | ||
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| // https://github.com/yisibl/resvg-js | ||
| const resvg = new Resvg(svg, { | ||
| background: '', | ||
| dpi: 600, | ||
| fitTo: { | ||
| mode: 'width', | ||
| value: 1200, | ||
| }, | ||
| font: { | ||
| // @ts-expect-error missing types | ||
| fontBuffers: [nunito], | ||
| }, | ||
| }) | ||
| const pngData = resvg.render() | ||
| const pngBuffer = pngData.asPng() | ||
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| setHeader(event, 'Content-Type', 'image/png') | ||
| return pngBuffer | ||
| }) | ||
| }) | ||
|
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| function _wrapLine(input: string, width: number) { | ||
| const lines: string[] = [] | ||
| let line: string = '' | ||
| for (const word of input.split(' ')) { | ||
| if (line.length + word.length >= width) { | ||
| lines.push(line) | ||
| line = '' | ||
| } | ||
| line += word + ' ' | ||
| } | ||
| lines.push(line) | ||
| return lines | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| export interface PageMeta { | ||
| title: string | ||
| ogTitle: string | ||
| description: string | ||
| } | ||
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| export function usePageSEO(page: PageMeta) { | ||
| if (!process.server && !import.meta.dev) { | ||
| return | ||
| } | ||
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| const route = useRoute() | ||
| const appConfig = useAppConfig() | ||
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| const path = route.path === '/' ? '/_index' : route.path | ||
| const canonicalURL = import.meta.dev ? useRequestURL() : appConfig.site.url | ||
| const ogURL = new URL(`/_og${path}.png`, canonicalURL) | ||
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| ogURL.searchParams.set('name', appConfig.site.name) | ||
| ogURL.searchParams.set('title', page.ogTitle || page.title || appConfig.site.name) | ||
| ogURL.searchParams.set('description', page.description || appConfig.site.description || '') | ||
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| if (import.meta.prerender) { | ||
| prerenderRoutes(ogURL.pathname + ogURL.search) | ||
| ogURL.searchParams.delete('name') | ||
| ogURL.searchParams.delete('title') | ||
| ogURL.searchParams.delete('description') | ||
| } | ||
|
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||
| useSeoMeta({ | ||
| title: page.title, | ||
| description: page.description, | ||
| ogImage: { | ||
| url: ogURL.href, | ||
| width: 1200, | ||
| height: 600, | ||
| type: 'image/png', | ||
| alt: page.description || appConfig.site.description, | ||
| }, | ||
| twitterImage: { | ||
| url: ogURL.href, | ||
| width: 1200, | ||
| height: 600, | ||
| alt: page.description || appConfig.site.description, | ||
| }, | ||
| }) | ||
| } |
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