Feat: proxy endpoint 추가

- kakao map image 조회를 위해 proxy endpoint 추가

src/app.module.ts

@@ -12,6 +12,7 @@ import { envValidation } from './common/helper/env.validation';
 import { GptModule } from './gpt/gpt.module';
 import { MapModule } from './map/map.module';
 import { PlaceModule } from './place/place.module';
+import { ProxyModule } from './proxy/proxy.module';
 import { SearchModule } from './search/search.module';
 import { UserModule } from './user/user.module';
 import { UtilModule } from './util/util.module';
@@ -34,6 +35,7 @@ import { UtilModule } from './util/util.module';
     UtilModule,
     PlaceModule,
     InviteLinkModule,
+    ProxyModule,
   ],
   controllers: [],
   providers: [],

src/proxy/proxy.controller.ts

@@ -0,0 +1,21 @@
+import { Controller, Get, Query, Response } from '@nestjs/common';
+import { ApiTags } from '@nestjs/swagger';
+
+import { Response as Res } from 'express';
+
+import { ProxyService } from 'src/proxy/proxy.service';
+
+@ApiTags('proxy')
+@Controller('proxy')
+export class ProxyController {
+  constructor(private readonly proxyService: ProxyService) {}
+
+  // TODO : 한정된 도메인에 대해서만 proxy 하도록 조건 추가 필요
+  @Get()
+  async getKakaoImage(@Query('url') url: string, @Response() res: Res) {
+    const result = await this.proxyService.fetchKakaoImage(url);
+
+    res.setHeader('Content-Type', result.contentType);
+    res.send(result.data);
+  }
+}

src/proxy/proxy.module.ts

@@ -0,0 +1,12 @@
+import { HttpModule } from '@nestjs/axios';
+import { Module } from '@nestjs/common';
+
+import { ProxyController } from './proxy.controller';
+import { ProxyService } from './proxy.service';
+
+@Module({
+  imports: [HttpModule],
+  controllers: [ProxyController],
+  providers: [ProxyService],
+})
+export class ProxyModule {}

src/proxy/proxy.service.ts

@@ -0,0 +1,22 @@
+import { HttpService } from '@nestjs/axios';
+import { Injectable } from '@nestjs/common';
+
+import { map } from 'rxjs/operators';
+
+@Injectable()
+export class ProxyService {
+  constructor(private readonly httpService: HttpService) {}
+
+  // 카카오 API로부터 이미지를 가져오는 메서드
+  async fetchKakaoImage(url: string): Promise<any> {
+    return this.httpService
+      .get(url, { responseType: 'arraybuffer' })
+      .pipe(
+        map((response) => ({
+          data: response.data,
+          contentType: response.headers['content-type'],
+        })),
+      )
+      .toPromise();
+  }
+}