UBERF-7597: Get rid of formats in preview.ts (#6077)

Signed-off-by: Andrey Sobolev <haiodo@gmail.com>

packages/presentation/src/preview.ts

@@ -4,9 +4,6 @@ import { getMetadata } from '@hcengineering/platform'
 import { getBlobHref, getClient, getCurrentWorkspaceUrl, getFileUrl } from '.'
 import presentation from './plugin'
 
-type SupportedFormat = string
-const defaultSupportedFormats = 'avif,webp,heif,jpeg'
-
 export interface ProviderPreviewConfig {
   // Identifier of provider
   // If set to '' could be applied to any provider, for example to exclude some 'image/gif' etc from being processing with providers.
@@ -14,8 +11,6 @@ export interface ProviderPreviewConfig {
   // Preview url
   // If '' preview is disabled for config.
   previewUrl: string
-  // A supported file formats
-  formats: SupportedFormat[]
 
   // Content type markers, will check by containts, if passed, only allow to be used with matched content types.
   contentTypes?: string[]
@@ -28,8 +23,7 @@ export interface PreviewConfig {
 
 const defaultPreview = (): ProviderPreviewConfig => ({
   providerId: '',
-  formats: ['avif', 'webp', 'jpg'],
+  previewUrl: `/files/${getCurrentWorkspaceUrl()}?file=:blobId&size=:size`
-  previewUrl: `/files/${getCurrentWorkspaceUrl()}?file=:blobId.:format&size=:size`
 })
 
 /**
@@ -39,7 +33,7 @@ const defaultPreview = (): ProviderPreviewConfig => ({
 
 - providerName - a provider name should be same as in Storage configuration.
   It coult be empty and it will match by content types.
-- previewUrl - an Url with :workspace, :blobId, :downloadFile, :size, :format placeholders, they will be replaced in UI with an appropriate blob values.
+- previewUrl - an Url with :workspace, :blobId, :downloadFile, :size placeholders, they will be replaced in UI with an appropriate blob values.
 - supportedFormats - a `,` separated list of file extensions.
 - contentTypes - a ',' separated list of content type patterns.
 
@@ -58,14 +52,14 @@ export function parsePreviewConfig (config?: string): PreviewConfig | undefined
     if (c === '') {
       continue // Skip empty lines
     }
+    const vars = c.split('|')
     let [provider, url, formats, contentTypes] = c.split('|').map((it) => it.trim())
-    if (formats === undefined) {
+    if (vars.length === 3) {
-      formats = defaultSupportedFormats
+      contentTypes = formats // Backward compatibility, since formats are obsolete
     }
     const p: ProviderPreviewConfig = {
       providerId: provider,
       previewUrl: url,
-      formats: formats.split(',').map((it) => it.trim()),
       // Allow preview only for images by default
       contentTypes:
         contentTypes !== undefined
@@ -94,7 +88,6 @@ export function getPreviewConfig (): PreviewConfig {
           {
             providerId: '',
             contentTypes: ['image/gif', 'image/apng', 'image/svg'], // Disable gif and apng format preview.
-            formats: [],
             previewUrl: ''
           }
         ]
@@ -182,13 +175,7 @@ function blobToSrcSet (
   url = url.replaceAll(':blobId', encodeURIComponent(blob._id))
 
   let result = ''
-  for (const f of cfg.formats ?? []) {
+  const fu = url
-    if (result.length > 0) {
-      result += ', '
-    }
-
-    const fu = url.replaceAll(':format', f)
-
   if (width !== undefined) {
     result +=
       fu.replaceAll(':size', `${width}`) +
@@ -200,7 +187,7 @@ function blobToSrcSet (
   } else {
     result += fu.replaceAll(':size', `${-1}`)
   }
-  }
+
   return result
 }
 

server/front/readme.md

@@ -28,11 +28,11 @@ A `;` separated list of triples, providerName|previewUrl|supportedFormats.
 
 - providerName - a provider name should be same as in Storage configuration.
   It coult be empty and it will match by content types.
-- previewUrl - an Url with :workspace, :blobId, :downloadFile, :size, :format placeholders, they will be replaced in UI with an appropriate blob values.
+- previewUrl - an Url with :workspace, :blobId, :downloadFile, :size placeholders, they will be replaced in UI with an appropriate blob values.
 - supportedFormats - a `,` separated list of file extensions.
 - contentTypes - a ',' separated list of content type patterns.
 
-PREVIEW_CONFIG=*|https://front.hc.engineering/files/:workspace/api/preview/?format=:format&width=:size&image=:downloadFile
+PREVIEW_CONFIG=*|https://front.hc.engineering/files/:workspace/api/preview/?width=:size&image=:downloadFile
 
 ## Variables
 
@@ -40,7 +40,6 @@ PREVIEW_CONFIG=*|https://front.hc.engineering/files/:workspace/api/preview/?form
 - :blobId - an uniq blob _id identifier.
 - :size - a numeric value to determine required size of the image, image will not be upscaled, only downscaled. If -1 is passed, original image size value will be used.
 - :downloadFile - an URI encoded component value of full download URI, could be presigned uri to S3 storage.
-- :format - an a conversion file format, `avif`,`webp` etc.
 
 ## Passing default variant.
 
@@ -50,7 +49,7 @@ providerName could be set to `*` in this case it will be default preview provide
 
 If no preview config are specified, a default one targating a front service preview/resize functionality will be used.
 
-`/files/${getCurrentWorkspaceUrl()}?file=:blobId.:format&size=:size`
+`/files/${getCurrentWorkspaceUrl()}?file=:blobId&size=:size`
 
 ## Testing with dev-production/etc.
 

server/front/src/index.ts

@@ -32,13 +32,11 @@ import { v4 as uuid } from 'uuid'
 import { preConditions } from './utils'
 
 import fs from 'fs'
+import { Readable } from 'stream'
 
 const cacheControlValue = 'public, max-age=365d'
 const cacheControlNoCache = 'public, no-store, no-cache, must-revalidate, max-age=0'
 
-type SupportedFormat = 'jpeg' | 'avif' | 'heif' | 'webp' | 'png'
-const supportedFormats: SupportedFormat[] = ['avif', 'webp', 'heif', 'jpeg', 'png']
-
 async function storageUpload (
   ctx: MeasureContext,
   storageAdapter: StorageAdapter,
@@ -118,6 +116,8 @@ async function getFileRange (
           'Last-Modified': new Date(stat.modifiedOn).toISOString()
         })
 
+        res.send(Readable.toWeb(dataStream))
+
         dataStream.pipe(res)
 
         await new Promise<void>((resolve, reject) => {
@@ -179,7 +179,12 @@ async function getFile (
   }
   if (preConditions.IfUnmodifiedSince(req.headers, { lastModified: new Date(stat.modifiedOn) }) === 'failed') {
     // Send 412 (Precondition Failed)
-    res.statusCode = 412
+    res.writeHead(412, {
+      'content-type': stat.contentType,
+      etag: stat.etag,
+      'last-modified': new Date(stat.modifiedOn).toISOString(),
+      'cache-control': cacheControlValue
+    })
     res.end()
     return
   }
@@ -360,17 +365,12 @@ export function start (
             (req.query.token as string | undefined)
           payload = token !== undefined ? decodeToken(token) : payload
 
-          let uuid = req.params.file ?? req.query.file
+          const uuid = req.params.file ?? req.query.file
           if (uuid === undefined) {
             res.status(404).send()
             return
           }
 
-          const format: SupportedFormat | undefined = supportedFormats.find((it) => uuid.endsWith(it))
-          if (format !== undefined) {
-            uuid = uuid.slice(0, uuid.length - format.length - 1)
-          }
-
           let blobInfo = await ctx.with(
             'notoken-stat',
             { workspace: payload.workspace.name },
@@ -411,12 +411,13 @@ export function start (
           }
 
           const size = req.query.size !== undefined ? parseInt(req.query.size as string) : undefined
-          if (format !== undefined && isImage && blobInfo.contentType !== 'image/gif') {
+          const accept = req.headers.accept
+          if (accept !== undefined && isImage && blobInfo.contentType !== 'image/gif') {
             blobInfo = await ctx.with(
               'resize',
               {},
               async (ctx) =>
-                await getGeneratePreview(ctx, blobInfo as PlatformBlob, size ?? -1, uuid, config, payload, format)
+                await getGeneratePreview(ctx, blobInfo as PlatformBlob, size ?? -1, uuid, config, payload, accept)
             )
           }
 
@@ -731,6 +732,8 @@ export function start (
   }
 }
 
+const supportedFormats = ['avif', 'webp', 'heif', 'jpeg', 'png']
+
 async function getGeneratePreview (
   ctx: MeasureContext,
   blob: PlatformBlob,
@@ -738,11 +741,29 @@ async function getGeneratePreview (
   uuid: string,
   config: { storageAdapter: StorageAdapter },
   payload: Token,
-  format: SupportedFormat = 'jpeg'
+  accept: string
 ): Promise<PlatformBlob> {
   if (size === undefined) {
     return blob
   }
+
+  const formats = accept.split(',').map((it) => it.trim())
+
+  // Select appropriate format
+  let format: string | undefined
+
+  for (const f of formats) {
+    const [type] = f.split(';')
+    const [clazz, kind] = type.split('/')
+    if (clazz === 'image' && supportedFormats.includes(kind)) {
+      format = kind
+      break
+    }
+  }
+  if (format === undefined) {
+    return blob
+  }
+
   const sizeId = uuid + `%preview%${size}${format !== 'jpeg' ? format : ''}`
 
   const d = await config.storageAdapter.stat(ctx, payload.workspace, sizeId)
@@ -823,7 +844,7 @@ async function getGeneratePreview (
       Analytics.handleError(err)
       ctx.error('failed to resize image', {
         err,
-        format,
+        format: accept,
         contentType: blob.contentType,
         uuid,
         size: blob.size,

server/front/src/starter.ts

@@ -103,7 +103,7 @@ export function startFront (ctx: MeasureContext, extraConfig?: Record<string, st
 
   if (previewConfig === undefined) {
     // Use universal preview config
-    previewConfig = `*|${uploadUrl}/:workspace?file=:blobId.:format&size=:size`
+    previewConfig = `*|${uploadUrl}/:workspace?file=:blobId&size=:size`
   }
 
   const pushPublicKey = process.env.PUSH_PUBLIC_KEY