Merge pull request #10 from UMC-7-Time-Lapse/feat/#9

feat: S3 서비스 레이어 구현

src/main/java/com/hackathon/TimeLapse/s3/S3Controller.java

@@ -0,0 +1,33 @@
+package com.hackathon.TimeLapse.s3;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+
+import lombok.RequiredArgsConstructor;
+
+@RestController
+@RequestMapping("/api/files")
+@RequiredArgsConstructor
+public class S3Controller {
+
+	private final S3Service s3Service;
+
+	@PostMapping(value = "/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+	public ResponseEntity<String> uploadFile(@RequestParam("file") MultipartFile file) {
+		return s3Service.uploadFile(file);
+	}
+
+	@GetMapping("/url")
+	public String getFileUrl(@RequestParam("fileName") String fileName) {
+		return s3Service.getFileUrl(fileName);
+	}
+
+	@DeleteMapping("/delete")
+	public ResponseEntity<String> deleteFile(@RequestParam("fileName") String fileName) {
+		s3Service.deleteFile(fileName);
+		return ResponseEntity.ok("File deleted successfully");
+	}
+}

src/main/java/com/hackathon/TimeLapse/s3/S3Service.java

@@ -0,0 +1,63 @@
+package com.hackathon.TimeLapse.s3;
+
+import java.io.IOException;
+import java.net.URL;
+import java.time.LocalDateTime;
+import java.time.ZoneOffset;
+import java.util.Date;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Service;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.multipart.MultipartFile;
+
+import com.amazonaws.HttpMethod;
+import com.amazonaws.services.s3.AmazonS3Client;
+import com.amazonaws.services.s3.model.GeneratePresignedUrlRequest;
+import com.amazonaws.services.s3.model.ObjectMetadata;
+
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+public class S3Service {
+
+	private final AmazonS3Client amazonS3Client;
+
+	@Value("${cloud.aws.s3.bucket}")
+	private String bucket;
+
+	public ResponseEntity<String> uploadFile(@RequestParam("file") MultipartFile file) {
+		try {
+			String fileName = file.getOriginalFilename();
+			String fileUrl = "https://" + bucket + "/test" + fileName;
+			ObjectMetadata metadata = new ObjectMetadata();
+			metadata.setContentType(file.getContentType());
+			metadata.setContentLength(file.getSize());
+			amazonS3Client.putObject(bucket, fileName, file.getInputStream(), metadata);
+			return ResponseEntity.ok(fileUrl);
+		} catch (IOException e) {
+			e.printStackTrace();
+			return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).build();
+		}
+	}
+
+	public void deleteFile(String fileName) {
+		amazonS3Client.deleteObject(bucket, fileName);
+	}
+
+	public String getFileUrl(String fileName) {
+		LocalDateTime expiration = LocalDateTime.now().plusHours(1);
+		Date expirationDate = Date.from(expiration.atZone(ZoneOffset.systemDefault()).toInstant());
+
+		GeneratePresignedUrlRequest generatePresignedUrlRequest =
+			new GeneratePresignedUrlRequest(bucket, fileName)
+				.withMethod(HttpMethod.GET)
+				.withExpiration(expirationDate);
+
+		URL url = amazonS3Client.generatePresignedUrl(generatePresignedUrlRequest);
+		return url.toString();
+	}
+}