Feat : uuid와 해상도를 전달하면 해상도를 검사하고 적절한 mpd파일을 반환하는 PresignedGetObjectRequest를 요청하도록 수정

Author: tlswltjq

back/src/main/java/com/back/domain/file/video/controller/VideoController.java

@@ -37,8 +37,8 @@ public RsData<UploadUrlGetResponse> getUploadUrl(@RequestParam String filename)
 
     @GetMapping("/videos/download")
     @Operation(summary = "다운로드용 URL 요청", description = "파일 다운로드를 위한 Presigned URL을 발급받습니다.")
-    public RsData<DownLoadUrlGetResponse> getDownloadUrls(@RequestParam String objectKey) {
-        PresignedUrlResponse downloadUrl = fileManager.getDownloadUrl(objectKey);
+    public RsData<DownLoadUrlGetResponse> getDownloadUrls(@RequestParam String uuid, @RequestParam String resolution) {
+        PresignedUrlResponse downloadUrl = fileManager.getDownloadUrl(uuid, resolution);
         DownLoadUrlGetResponse response = new DownLoadUrlGetResponse(downloadUrl.url().toString(), downloadUrl.expiresAt());
         return new RsData<>("200", "다운로드용 URL 요청완료", response);
     }

back/src/main/java/com/back/domain/file/video/service/FileManager.java

@@ -8,13 +8,15 @@
 
 import java.net.URL;
 import java.time.LocalDateTime;
+import java.util.Set;
 import java.util.UUID;
 
 @Service
 @RequiredArgsConstructor
 public class FileManager {
     private final VideoService videoService;
     private final S3Service s3Service;
+    private final Set<String> validResolutions = Set.of("480p", "720p", "1080p");
 
     public PresignedUrlResponse getUploadUrl(String filename) {
         String contentType = validateAndGetContentType(filename);
@@ -53,8 +55,11 @@ private String validateAndGetContentType(String filename) {
         }
     }
 
-    public PresignedUrlResponse getDownloadUrl(String objectKey) {
+    public PresignedUrlResponse getDownloadUrl(String uuid, String resolution) {
         Integer expires = 60;
+        validateResolution(resolution);
+        videoService.isExistByUuid(uuid);
+        String objectKey = "transcoded/videos/" + uuid + "/" + resolution + "/manifest.mpd";
         URL url = s3Service.generateDownloadUrl(objectKey, expires);
         LocalDateTime expiresAt = LocalDateTime.now().plusMinutes(expires);
         return new PresignedUrlResponse(url, expiresAt);
@@ -68,4 +73,10 @@ public void updateVideoStatus(String videoId, String status) {
             videoService.createVideo(videoId, status, "/", 0);
         }
     }
+
+    public void validateResolution(String resolution) {
+        if (!validResolutions.contains(resolution)) {
+            throw new ServiceException("400", "지원하지 않는 해상도입니다: " + resolution);
+        }
+    }
 }