Improvements to the Upload Pipeline

com.woltlab.wcf/option.xml

@@ -532,6 +532,18 @@
 				<selectoptions>gd:wcf.acp.option.image_adapter_type.gd
 imagick:wcf.acp.option.image_adapter_type.imagick</selectoptions>
 			</option>
+			<option name="image_convert_format">
+				<categoryname>general.system.image</categoryname>
+				<optiontype>radioButton</optiontype>
+				<defaultvalue>webp</defaultvalue>
+				<selectoptions>keep:wcf.acp.option.image_convert_format.keep
+webp:wcf.acp.option.image_convert_format.webp</selectoptions>
+			</option>
+			<option name="image_strip_exif">
+				<categoryname>general.system.image</categoryname>
+				<optiontype>boolean</optiontype>
+				<defaultvalue>1</defaultvalue>
+			</option>
 			<!-- /general.system.image -->
 			<!-- general.system.search -->
 			<option name="search_engine">
@@ -922,18 +934,10 @@ redis:wcf.acp.option.cache_source_type.redis</selectoptions>
 			<option name="attachment_image_autoscale_file_type">
 				<categoryname>message.attachment.autoscale</categoryname>
 				<optiontype>radioButton</optiontype>
-				<defaultvalue>keep</defaultvalue>
+				<defaultvalue>image/jpeg</defaultvalue>
 				<selectoptions>keep:wcf.acp.option.attachment_image_autoscale_file_type.keep
 image/jpeg:wcf.acp.option.attachment_image_autoscale_file_type.jpeg</selectoptions>
 			</option>
-			<option name="attachment_image_autoscale_quality">
-				<categoryname>message.attachment.autoscale</categoryname>
-				<optiontype>integer</optiontype>
-				<defaultvalue>80</defaultvalue>
-				<minvalue>1</minvalue>
-				<maxvalue>100</maxvalue>
-				<suffix>percent</suffix>
-			</option>
 			<!-- message.general.edit -->
 			<option name="module_edit_history">
 				<categoryname>message.general.edit</categoryname>
@@ -1635,5 +1639,7 @@ DESC:wcf.global.sortOrder.descending</selectoptions>
 		<option name="message_sidebar_enable_articles"/>
 		<category name="security.blacklist"/>
 		<category name="security.blacklist.custom"/>
+
+		<option name="attachment_image_autoscale_quality"/>
 	</delete>
 </data>

com.woltlab.wcf/package.xml

@@ -56,5 +56,6 @@
 	<instruction type="database" run="standalone">acp/database/update_com.woltlab.wcf_62_step1.php</instruction>
 	<instruction type="script">acp/update_com.woltlab.wcf_6.2_contactOptions.php</instruction>
 	<instruction type="database" run="standalone">acp/database/update_com.woltlab.wcf_62_step2.php</instruction>
+	<instruction type="script">acp/update_com.woltlab.wcf_6.2_option.php</instruction>
 	-->
 </package>

constants.php

@@ -201,8 +201,7 @@
 \define("ATTACHMENT_IMAGE_AUTOSCALE", 1);
 \define("ATTACHMENT_IMAGE_AUTOSCALE_MAX_WIDTH", 1024);
 \define("ATTACHMENT_IMAGE_AUTOSCALE_MAX_HEIGHT", 1024);
-\define("ATTACHMENT_IMAGE_AUTOSCALE_FILE_TYPE", '');
-\define("ATTACHMENT_IMAGE_AUTOSCALE_QUALITY", 80);
+\define("ATTACHMENT_IMAGE_AUTOSCALE_FILE_TYPE", 'image/jpeg');
 \define('LOG_MISSING_LANGUAGE_ITEMS', 0);
 \define('PRUNE_IP_ADDRESS', 30);
 \define('BREADCRUMBS_HOME_USE_PAGE_TITLE', 1);
@@ -228,3 +227,5 @@
 \define('SERVICE_WORKER_PRIVATE_KEY', '');
 \define('SERVICE_WORKER_PUBLIC_KEY', '');
 \define('RECAPTCHA_PRIVATEKEY_V3', '');
+\define('IMAGE_CONVERT_FORMAT', 'webp');
+\define('IMAGE_STRIP_EXIF', 1);

phpstan-ambient.neon

@@ -230,3 +230,5 @@ parameters:
         - SERVICE_WORKER_PRIVATE_KEY
         - SERVICE_WORKER_PUBLIC_KEY
         - RECAPTCHA_PRIVATEKEY_V3
+        - IMAGE_CONVERT_FORMAT
+        - IMAGE_STRIP_EXIF

ts/WoltLabSuite/Core/Api/Files/GenerateThumbnails.ts

@@ -5,7 +5,12 @@ type Thumbnail = {
   identifier: string;
   link: string;
 };
-type Response = Thumbnail[];
+type Response = {
+  filename: string;
+  fileSize: number;
+  mimeType: string;
+  thumbnails: Thumbnail[];
+};
 
 export async function generateThumbnails(fileID: number): Promise<ApiResult<Response>> {
   const url = new URL(`${window.WSC_RPC_API_URL}core/files/${fileID}/generate-thumbnails`);

ts/WoltLabSuite/Core/Api/Files/Upload.ts

@@ -1,5 +1,6 @@
 import { prepareRequest } from "WoltLabSuite/Core/Ajax/Backend";
 import { ApiResult, apiResultFromError, apiResultFromValue } from "../Result";
+import type { Exif } from "WoltLabSuite/Core/Image/ExifUtil";
 
 type Response = {
   identifier: string;
@@ -12,15 +13,25 @@ export async function upload(
   fileHash: string,
   objectType: string,
   context: string,
+  exifBytes: Exif | null = null,
 ): Promise<ApiResult<Response>> {
   const url = new URL(`${window.WSC_RPC_API_URL}core/files/upload`);
 
+  let exifData: string | null = null;
+  if (exifBytes !== null) {
+    exifData = "";
+    for (let i = 0, length = exifBytes.length; i < length; i++) {
+      exifData += exifBytes[i].toString(16).padStart(2, "0");
+    }
+  }
+
   const payload = {
     filename,
     fileSize,
     fileHash,
     objectType,
     context,
+    exifData,
   };
 
   let response: Response;

ts/WoltLabSuite/Core/Component/Attachment/Entry.ts

@@ -9,6 +9,7 @@ import {
   insertFileInformation,
   removeUploadProgress,
   trackUploadProgress,
+  updateFileInformation,
 } from "WoltLabSuite/Core/Component/File/Helper";
 
 type FileProcessorData = {
@@ -176,6 +177,10 @@ export function createAttachmentFromFile(file: WoltlabCoreFileElement, editor: H
 
   insertFileInformation(element, file);
 
+  file.addEventListener("file:update-data", () => {
+    updateFileInformation(element, file);
+  });
+
   void file.ready
     .then(() => {
       fileInitializationCompleted(element, file, editor);

ts/WoltLabSuite/Core/Component/File/Helper.ts

@@ -103,3 +103,11 @@ export function insertFileInformation(container: HTMLElement, file: WoltlabCoreF
 
   container.append(fileWrapper, filename, fileSize);
 }
+
+export function updateFileInformation(container: HTMLElement, file: WoltlabCoreFileElement): void {
+  const filename = container.querySelector(".fileList__item__filename")!;
+  filename.textContent = file.filename || file.dataset.filename!;
+
+  const fileSize = container.querySelector(".fileList__item__fileSize")!;
+  fileSize.textContent = formatFilesize(file.fileSize || parseInt(file.dataset.fileSize!));
+}

ts/WoltLabSuite/Core/Component/File/Upload.ts

@@ -13,6 +13,7 @@ import { innerError } from "WoltLabSuite/Core/Dom/Util";
 import { getPhrase } from "WoltLabSuite/Core/Language";
 import { createSHA256 } from "hash-wasm";
 import { cropImage, CropperConfiguration } from "WoltLabSuite/Core/Component/Image/Cropper";
+import { Exif, getExifBytesFromJpeg, getExifBytesFromWebP } from "WoltLabSuite/Core/Image/ExifUtil";
 
 export type CkeditorDropEvent = {
   file: File;
@@ -44,6 +45,7 @@ async function upload(
   element: WoltlabCoreFileUploadElement,
   file: File,
   fileHash: string,
+  exifData: Exif | null,
 ): Promise<ResponseCompleted | undefined> {
   const objectType = element.dataset.objectType!;
 
@@ -54,7 +56,14 @@ async function upload(
   const event = new CustomEvent<WoltlabCoreFileElement>("uploadStart", { detail: fileElement });
   element.dispatchEvent(event);
 
-  const response = await filesUpload(file.name, file.size, fileHash, objectType, element.dataset.context || "");
+  const response = await filesUpload(
+    file.name,
+    file.size,
+    fileHash,
+    objectType,
+    element.dataset.context || "",
+    exifData,
+  );
   if (!response.ok) {
     const validationError = response.error.getValidationError();
     if (validationError === undefined) {
@@ -118,8 +127,9 @@ async function chunkUploadCompleted(fileElement: WoltlabCoreFileElement, result:
   fileElement.uploadCompleted(result.fileID, result.mimeType, result.link, result.data, result.generateThumbnails);
 
   if (result.generateThumbnails) {
-    const response = await generateThumbnails(result.fileID);
-    fileElement.setThumbnails(response.unwrap());
+    const { filename, fileSize, mimeType, thumbnails } = (await generateThumbnails(result.fileID)).unwrap();
+    fileElement.setThumbnails(thumbnails);
+    fileElement.updateFileData(filename, fileSize, mimeType);
   }
 }
 
@@ -163,7 +173,7 @@ async function resizeImage(element: WoltlabCoreFileUploadElement, file: File): P
   const resizeConfiguration = JSON.parse(element.dataset.resizeConfiguration!) as ResizeConfiguration;
 
   const resizer = new ImageResizer();
-  const { image, exif } = await resizer.loadFile(file);
+  const { image } = await resizer.loadFile(file);
 
   const maxHeight = resizeConfiguration.maxHeight === -1 ? image.height : resizeConfiguration.maxHeight;
   let maxWidth = resizeConfiguration.maxWidth === -1 ? image.width : resizeConfiguration.maxWidth;
@@ -187,14 +197,13 @@ async function resizeImage(element: WoltlabCoreFileUploadElement, file: File): P
 
   let fileType: string = resizeConfiguration.fileType;
   if (fileType === "image/jpeg" || fileType === "image/webp") {
-    fileType = "image/jpeg";
+    fileType = "image/webp";
   } else {
     fileType = file.type;
   }
 
   const resizedFile = await resizer.saveFile(
     {
-      exif,
       image: canvas,
     },
     file.name,
@@ -290,6 +299,29 @@ function reportError(element: WoltlabCoreFileUploadElement, file: File | null, m
   innerError(element, message);
 }
 
+async function getExifBytes(file: File): Promise<Exif | null> {
+  if (file.type === "image/jpeg") {
+    try {
+      const bytes = await getExifBytesFromJpeg(file);
+
+      // ExifUtil returns the entire section but we only need the app data.
+      // Removing the first 10 bytes drops the 0xFF 0xE1 marker followed by two
+      // bytes for the length and then 6 bytes for the "Exif\x00\x00" header.
+      return bytes.slice(10);
+    } catch {
+      return null;
+    }
+  } else if (file.type === "image/webp") {
+    try {
+      return await getExifBytesFromWebP(file);
+    } catch {
+      return null;
+    }
+  }
+
+  return null;
+}
+
 export function setup(): void {
   wheneverFirstSeen("woltlab-core-file-upload", (element: WoltlabCoreFileUploadElement) => {
     element.addEventListener("upload:files", (event: CustomEvent<{ files: File[] }>) => {
@@ -311,11 +343,15 @@ export function setup(): void {
 
       element.markAsBusy();
 
+      const exifData = new Map<File, Exif | null>();
+
       let processImage: (file: File) => Promise<File>;
       if (element.dataset.cropperConfiguration) {
         const cropperConfiguration = JSON.parse(element.dataset.cropperConfiguration) as CropperConfiguration;
 
         processImage = async (file) => {
+          exifData.set(file, await getExifBytes(file));
+
           try {
             return await cropImage(element, file, cropperConfiguration);
           } catch (e) {
@@ -325,7 +361,11 @@ export function setup(): void {
           }
         };
       } else {
-        processImage = async (file) => resizeImage(element, file);
+        processImage = async (file) => {
+          exifData.set(file, await getExifBytes(file));
+
+          return resizeImage(element, file);
+        };
       }
 
       // Resize all files in parallel but keep the original order. This ensures
@@ -359,7 +399,8 @@ export function setup(): void {
             const result = checksums[i];
 
             if (result.status === "fulfilled") {
-              void upload(element, validFiles[i], result.value);
+              const exif = exifData.get(validFiles[i]) || null;
+              void upload(element, validFiles[i], result.value, exif);
             } else {
               throw new Error(result.reason);
             }
@@ -394,26 +435,32 @@ export function setup(): void {
         return;
       }
 
-      void resizeImage(element, file).then(async (resizeFile) => {
-        try {
-          const checksum = await getSha256Hash(resizeFile);
-          const data = await upload(element, resizeFile, checksum);
-          if (data === undefined || typeof data.data.attachmentID !== "number") {
+      let exifData: Exif | null;
+      void getExifBytes(file)
+        .then((exif) => {
+          exifData = exif;
+        })
+        .then(() => resizeImage(element, file))
+        .then(async (resizeFile) => {
+          try {
+            const checksum = await getSha256Hash(resizeFile);
+            const data = await upload(element, resizeFile, checksum, exifData);
+            if (data === undefined || typeof data.data.attachmentID !== "number") {
+              promiseReject();
+            } else {
+              const attachmentData: AttachmentData = {
+                attachmentId: data.data.attachmentID,
+                url: data.link,
+              };
+
+              promiseResolve(attachmentData);
+            }
+          } catch (e) {
             promiseReject();
-          } else {
-            const attachmentData: AttachmentData = {
-              attachmentId: data.data.attachmentID,
-              url: data.link,
-            };
 
-            promiseResolve(attachmentData);
+            throw e;
           }
-        } catch (e) {
-          promiseReject();
-
-          throw e;
-        }
-      });
+        });
     });
   });
 }

ts/WoltLabSuite/Core/Component/File/woltlab-core-file.ts

@@ -32,6 +32,7 @@ export class Thumbnail {
   }
 }
 
+// eslint-disable-next-line @typescript-eslint/no-unsafe-declaration-merging
 export class WoltlabCoreFileElement extends HTMLElement {
   #data: Record<string, unknown> | undefined = undefined;
   #filename: string = "";
@@ -321,6 +322,20 @@ export class WoltlabCoreFileElement extends HTMLElement {
     this.#readyResolve();
   }
 
+  /**
+   * Updates the filename, file size and mime type. These can change for images
+   * that are being converted to a different file format,
+   *
+   * @internal
+   */
+  updateFileData(filename: string, fileSize: number, mimeType: string): void {
+    this.#filename = filename;
+    this.#fileSize = fileSize;
+    this.#mimeType = mimeType;
+
+    this.dispatchEvent(new CustomEvent<void>("file:update-data"));
+  }
+
   isFailedUpload(): boolean {
     return this.#state === State.Failed;
   }
@@ -346,6 +361,21 @@ export class WoltlabCoreFileElement extends HTMLElement {
   }
 }
 
+interface WoltlabCoreFileElementEventMap {
+  "file:update-data": CustomEvent<void>;
+}
+
+// eslint-disable-next-line @typescript-eslint/no-unsafe-declaration-merging
+export interface WoltlabCoreFileElement extends HTMLElement {
+  addEventListener: {
+    <T extends keyof WoltlabCoreFileElementEventMap>(
+      type: T,
+      listener: (this: Selection, ev: WoltlabCoreFileElementEventMap[T]) => any,
+      options?: boolean | AddEventListenerOptions,
+    ): void;
+  } & HTMLElement["addEventListener"];
+}
+
 export default WoltlabCoreFileElement;
 
 window.customElements.define("woltlab-core-file", WoltlabCoreFileElement);