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53 lines
1.6 KiB
TypeScript
53 lines
1.6 KiB
TypeScript
//
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// Copyright © 2024 Hardcore Engineering Inc.
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//
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// Licensed under the Eclipse Public License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License. You may
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// obtain a copy of the License at https://www.eclipse.org/legal/epl-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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//
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import { getBlobURL } from './blob'
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import { type BlobRequest } from './types'
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const prefferedImageFormats = ['webp', 'avif', 'jpeg', 'png']
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export async function handleImageGet (request: BlobRequest): Promise<Response> {
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const {
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workspace,
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name,
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params: { transform }
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} = request
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const Accept = request.headers.get('Accept') ?? 'image/*'
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const image: Record<string, string> = {}
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// select format based on Accept header
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const formats = Accept.split(',')
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for (const format of formats) {
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const [type] = format.split(';')
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const [clazz, kind] = type.split('/')
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if (clazz === 'image' && prefferedImageFormats.includes(kind)) {
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image.format = kind
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break
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}
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}
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// apply transforms
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transform.split(',').reduce((acc, param) => {
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const [key, value] = param.split('=')
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acc[key] = value
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return acc
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}, image)
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const blobURL = getBlobURL(request, workspace, name)
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const imageRequest = new Request(blobURL, { headers: { Accept } })
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return await fetch(imageRequest, { cf: { image, cacheTtl: 3600 } })
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}
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