v4.0.15上传图片自动压缩

server/dukang-api/src/common/image/activity-poster-upload.util.ts

@@ -0,0 +1,101 @@
+import { BadRequestException } from '@nestjs/common';
+import {
+  activityPosterResizeTarget,
+  activityPosterTemplateTooLarge,
+} from '@dukang/shared-types';
+import sharp from 'sharp';
+
+const JPEG_QUALITY = 85;
+
+export type ActivityPosterUploadPrepared = {
+  buffer: Buffer;
+  mimeType: string;
+  width: number;
+  height: number;
+  originalWidth: number;
+  originalHeight: number;
+  compressed: boolean;
+};
+
+function resolveOutputMime(hasAlpha: boolean, inputMime?: string): string {
+  if (hasAlpha) return 'image/png';
+  if (inputMime === 'image/webp') return 'image/jpeg';
+  if (inputMime?.startsWith('image/')) return inputMime;
+  return 'image/jpeg';
+}
+
+async function encodeImage(
+  pipeline: sharp.Sharp,
+  mimeType: string,
+): Promise<Buffer> {
+  if (mimeType === 'image/png') {
+    return pipeline.png().toBuffer();
+  }
+  if (mimeType === 'image/jpeg' || mimeType === 'image/jpg') {
+    return pipeline.jpeg({ quality: JPEG_QUALITY }).toBuffer();
+  }
+  if (mimeType === 'image/webp') {
+    return pipeline.webp({ quality: JPEG_QUALITY }).toBuffer();
+  }
+  return pipeline.jpeg({ quality: JPEG_QUALITY }).toBuffer();
+}
+
+export async function prepareActivityPosterUpload(input: {
+  buffer: Buffer;
+  mimeType?: string;
+}): Promise<ActivityPosterUploadPrepared> {
+  if (!input.buffer?.length) {
+    throw new BadRequestException('活动图文件为空');
+  }
+  if (input.mimeType && !input.mimeType.startsWith('image/')) {
+    throw new BadRequestException('活动图仅支持图片文件');
+  }
+
+  const meta = await sharp(input.buffer, { failOn: 'none' }).metadata();
+  if (!meta.width || !meta.height) {
+    throw new BadRequestException('活动图无法读取尺寸，请换一张图片');
+  }
+
+  const originalWidth = meta.width;
+  const originalHeight = meta.height;
+  const resizeTarget = activityPosterResizeTarget(originalWidth, originalHeight);
+
+  if (!resizeTarget) {
+    return {
+      buffer: input.buffer,
+      mimeType: input.mimeType || 'image/jpeg',
+      width: originalWidth,
+      height: originalHeight,
+      originalWidth,
+      originalHeight,
+      compressed: false,
+    };
+  }
+
+  const hasAlpha = meta.hasAlpha === true;
+  const outputMime = resolveOutputMime(hasAlpha, input.mimeType);
+  const buffer = await encodeImage(
+    sharp(input.buffer, { failOn: 'none' }).resize(resizeTarget.width, resizeTarget.height, {
+      fit: 'inside',
+      withoutEnlargement: true,
+    }),
+    outputMime,
+  );
+  const metaOut = await sharp(buffer).metadata();
+  const width = metaOut.width ?? resizeTarget.width;
+  const height = metaOut.height ?? resizeTarget.height;
+
+  if (activityPosterTemplateTooLarge(width, height)) {
+    throw new BadRequestException('活动图压缩后仍超出尺寸限制，请换一张较小的图片');
+  }
+
+  return {
+    buffer,
+    mimeType: outputMime,
+    width,
+    height,
+    originalWidth,
+    originalHeight,
+    compressed: true,
+  };
+}

server/dukang-api/src/modules/common/resource.service.ts

@@ -3,6 +3,7 @@ import type { ResourceBizType, ResourceMediaType, ResourceOwnerType } from '@pri
 import { Prisma } from '@prisma/client';
 import { PrismaService } from '../../common/prisma/prisma.module';
 import { serializeBigInt } from '../../common/decorators/current-user.decorator';
+import { prepareActivityPosterUpload } from '../../common/image/activity-poster-upload.util';
 import { OSS_PROVIDER } from '../../integrations/integrations.constants';
 import type { IOssProvider } from '../../integrations/oss/oss.interface';
 import { logOssUpload, type OssActorRef } from '../../integrations/oss/oss-log.util';
@@ -105,19 +106,75 @@ export class ResourceService {
     if (dto.bizType === 'AVATAR' && !file.mimetype?.startsWith('image/')) {
       throw new BadRequestException('头像仅支持图片文件');
     }
+    if (dto.bizType === 'ACTIVITY_POSTER' && dto.mediaType === 'IMAGE' && !file.mimetype?.startsWith('image/')) {
+      throw new BadRequestException('活动图仅支持图片文件');
+    }
+
+    let uploadBuffer = file.buffer;
+    let uploadMimeType = file.mimetype;
+    let imageMeta: {
+      width: number;
+      height: number;
+      originalWidth: number;
+      originalHeight: number;
+      compressed: boolean;
+      fileSize: number;
+    } | undefined;
+
+    if (dto.bizType === 'ACTIVITY_POSTER' && dto.mediaType === 'IMAGE') {
+      const prepared = await prepareActivityPosterUpload({
+        buffer: file.buffer,
+        mimeType: file.mimetype,
+      });
+      if (prepared.buffer.length > maxUploadBytes) {
+        const message = `活动图压缩后仍超过 ${Math.floor(maxUploadBytes / 1024 / 1024)}MB（当前 ${prepared.width}×${prepared.height}）`;
+        await logOssUpload(this.prisma, {
+          scene: 'UPLOAD_PUT_OBJECT',
+          actorRef: actor,
+          requestBody: {
+            ...requestBody,
+            imageWidth: prepared.width,
+            imageHeight: prepared.height,
+            compressed: prepared.compressed,
+          },
+          status: 'FAILED',
+          errorMessage: message,
+        });
+        throw new BadRequestException(message);
+      }
+      uploadBuffer = prepared.buffer;
+      uploadMimeType = prepared.mimeType;
+      imageMeta = {
+        width: prepared.width,
+        height: prepared.height,
+        originalWidth: prepared.originalWidth,
+        originalHeight: prepared.originalHeight,
+        compressed: prepared.compressed,
+        fileSize: prepared.buffer.length,
+      };
+    }
 
     try {
       const result = await this.oss.putObject({
         bizType: dto.bizType,
         mediaType: dto.mediaType,
         fileName: file.originalname || 'upload.bin',
-        buffer: file.buffer,
-        mimeType: file.mimetype,
+        buffer: uploadBuffer,
+        mimeType: uploadMimeType,
       });
       await logOssUpload(this.prisma, {
         scene: 'UPLOAD_PUT_OBJECT',
         actorRef: actor,
-        requestBody,
+        requestBody: {
+          ...requestBody,
+          ...(imageMeta
+            ? {
+                imageWidth: imageMeta.width,
+                imageHeight: imageMeta.height,
+                compressed: imageMeta.compressed,
+              }
+            : {}),
+        },
         responseBody: {
           bucket: result.bucket,
           region: result.region,
@@ -139,14 +196,14 @@ export class ResourceService {
             ossKey: result.ossKey,
             url: result.url,
             fileName: file.originalname || 'avatar',
-            fileSize: BigInt(file.size),
-            mimeType: file.mimetype,
+            fileSize: BigInt(uploadBuffer.length),
+            mimeType: uploadMimeType,
             status: 'ACTIVE',
           },
         });
-        return serializeBigInt({ ...result, resourceId: resource.id });
+        return serializeBigInt({ ...result, resourceId: resource.id, ...(imageMeta ? { image: imageMeta } : {}) });
       }
-      return result;
+      return { ...result, ...(imageMeta ? { image: imageMeta } : {}) };
     } catch (err) {
       await logOssUpload(this.prisma, {
         scene: 'UPLOAD_PUT_OBJECT',