Merge pull request #53 from GDSC-Ewha-5th/LimYoungseo

[임영서] 5주차 과제 -complete

5주차 Server S-Day 과제/S3Controller_LimYoungseo.java

@@ -0,0 +1,79 @@
+//package ServerStudy5Cloud.ServerStudy5Cloud.Controller;
+
+import com.amazonaws.services.s3.AmazonS3;
+import com.amazonaws.services.s3.model.CannedAccessControlList;
+import com.amazonaws.services.s3.model.ObjectListing;
+import com.amazonaws.services.s3.model.ObjectMetadata;
+import com.amazonaws.services.s3.model.S3ObjectSummary;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+
+@Controller
+@RequiredArgsConstructor
+public class S3Controller {
+
+    private final AmazonS3 amazonS3;
+
+    @Value("${cloud.aws.s3.bucket}")
+    private String bucketName;
+
+    @GetMapping("/")
+    public String listFiles(Model model) {
+        //getUrl로 객체 URL 가져온 후, List<String>에 넣어 index.html에 반환하기
+        //업로드할 URL 파일 목록을 저장할 리스트 생성
+        List<String> fileUrls = new ArrayList<>();
+
+        //S3 내의 객체 목록 가져오기
+        ObjectListing objectListing = amazonS3.listObjects(bucketName);
+        List<S3ObjectSummary> objectSummaries = objectListing.getObjectSummaries();
+
+        // 객체 URL 가져와서 리스트에 추가
+        for (S3ObjectSummary objectSummary : objectSummaries) {
+            String fileUrl = amazonS3.getUrl(bucketName, objectSummary.getKey()).toString();
+            fileUrls.add(fileUrl);
+        }
+
+        // 모델에 URL 리스트 추가 
+        model.addAttribute("fileUrls", fileUrls);
+
+        return "index";
+    }
+
+
+
+    @PostMapping("/upload")
+    public String uploadFile(@RequestParam("file") MultipartFile file) throws IOException{
+
+        //putObject와 setObjectAcl로 이미지 업로드하고 ACL 퍼블릭으로 만들기
+        //파일 이름가져오기
+        String originalFilename = file.getOriginalFilename();
+
+        //메타데이터 설정
+        ObjectMetadata metadata = new ObjectMetadata();
+        metadata.setContentLength(file.getSize());
+        metadata.setContentType(file.getContentType());
+
+        // putObject로 s3에 파일 업로드
+        amazonS3.putObject(bucketName, originalFilename, file.getInputStream(),metadata);
+
+        //업로드한 객체에 ACL퍼블릭 설정
+        amazonS3.setObjectAcl(bucketName, originalFilename, CannedAccessControlList.PublicRead);
+
+        return "redirect:/";
+
+
+    }
+}
+
+//https://drive.google.com/file/d/1o9uRjxExZHYJOCKX6aTS8y8KKc-vic0d/view?usp=sharing