fix: proxy ranking avatars through backend

src/business/rankings/rankings.controller.ts

@@ -1,5 +1,6 @@
-import { Controller, Get, Query } from '@nestjs/common';
+import { Controller, Get, Header, Param, Query, Res } from '@nestjs/common';
 import { ApiOperation, ApiQuery, ApiTags } from '@nestjs/swagger';
+import { Response } from 'express';
 import { RankingsService } from './rankings.service';
 import { RankingCategoryId } from './rankings.types';
 
@@ -8,6 +9,17 @@ import { RankingCategoryId } from './rankings.types';
 export class RankingsController {
   constructor(private readonly rankingsService: RankingsService) {}
 
+  @Get('datawhale-honor/avatar/:memberId')
+  @Header('Cache-Control', 'public, max-age=86400, stale-while-revalidate=604800')
+  @ApiOperation({ summary: '代理 Datawhale 荣誉榜成员头像' })
+  async getDatawhaleMemberAvatar(
+    @Param('memberId') memberId: string,
+    @Res() res: Response,
+  ): Promise<void> {
+    const avatar = await this.rankingsService.getMemberAvatar(memberId);
+    res.type(avatar.contentType).send(avatar.body);
+  }
+
   @Get('datawhale-honor')
   @ApiOperation({
     summary: '获取Datawhale荣誉榜',