Hello world!
This is the second article about my experience at Makers building a social network clone. Link to the first article - https://dev.to/olnov/working-with-http-requests-in-spring-boot-5el0. The current one is dedicated to storing images for users' profiles.
Step #1. Planning.
As a part of our MVP, we decided to implement the following user story:
As a user,
I want to update my profile to include my photo,
So that other users can easily find me in the app
We also agreed on non-functional requirements.
- Image files are PNG or JPG only.
- File size should not exceed 1 MB.
Step #2. Analyze and Design.
We came up with different options for where to store images - remote server folder, database and object storage. Even though our application was not highly loaded, we decided to use S3 as the most appropriate solution for distributed systems. (P.S. and I had an existing iDrive e2 subscription from a previous project).
In the Database, there were only links to the public URL of iDrive storage.
Here is the DB diagram:
High-level app diagram:
Step #3. Build.
The backend part needed the following to be completed:
- Add AWS SDK to the project.
- Implement Image Service to work with external integration.
- Implement an Image Controller to put images into a bucket using the Image Service and save the corresponding record in the DB.
In pom.xml I added the following:
<dependency> <groupid>software.amazon.awssdk</groupid> <artifactid>s3</artifactid> <version>2.28.18</version> </dependency>
ImageService Class:
package com.makersacademy.acebook.service; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Service; import software.amazon.awssdk.auth.credentials.AwsBasicCredentials; import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider; import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.s3.S3Client; import software.amazon.awssdk.services.s3.model.PutObjectRequest; import software.amazon.awssdk.services.s3.model.PutObjectResponse; import java.io.InputStream; import java.net.URI; import java.util.UUID; @Service public class ImageService { private final S3Client s3Client; @Value("${idrive.e2.bucket-name}") private String bucketName; @Value("${idrive.e2.endpoint}") private String endpoint; @Value("${idrive.e2.public_endpoint}") private String public_endpoint; public ImageService(@Value("${idrive.e2.access-key}") String accessKey, @Value("${idrive.e2.secret-key}") String secretKey, @Value("${idrive.e2.endpoint}") String endpoint) { AwsBasicCredentials credentials = AwsBasicCredentials.create(accessKey, secretKey); this.s3Client = S3Client.builder() .credentialsProvider(StaticCredentialsProvider.create(credentials)) .endpointOverride(URI.create(endpoint)) .region(Region.AWS_GLOBAL) // I dind't see exact instructions from iDrive, so I set this parameter to AWS_GLOBAL .build(); } public String uploadImage(InputStream imageStream, long contentLength, String contentType) { String key = "media/" + UUID.randomUUID(); PutObjectRequest putObjectRequest = PutObjectRequest.builder() .bucket(bucketName) .key(key) .contentType(contentType) .contentLength(contentLength) // Specify the content length .build(); s3Client.putObject(putObjectRequest, software.amazon.awssdk.core.sync.RequestBody.fromInputStream(imageStream, contentLength)); // Return the image URL return public_endpoint + "/" + bucketName + "/" + key; } }
Idrive connection variables are stored in application.properties file:
#S3 storage settings idrive.e2.access-key=${E2_ACCESS_KEY} idrive.e2.secret-key=${E2_SECRET_KEY} idrive.e2.endpoint=${E2_ENDPOINT} idrive.e2.bucket-name=${E2_BUCKET_NAME} idrive.e2.public_endpoint=${E2_PUBLIC_ENDPOINT}
Ok, now ImageController Class:
package com.makersacademy.acebook.controller; import com.makersacademy.acebook.model.Post; import com.makersacademy.acebook.repository.PostRepository; import com.makersacademy.acebook.service.ImageService; import com.makersacademy.acebook.model.User; import com.makersacademy.acebook.repository.UserRepository; import jakarta.servlet.http.HttpSession; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.*; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.servlet.view.RedirectView; import java.io.IOException; @Controller public class ImageController { @Autowired private ImageService imageService; @Autowired private UserRepository userRepository; @Autowired private PostRepository postRepository; @PostMapping("/upload/{userId}") public RedirectView uploadImage(@PathVariable Long userId, @RequestParam("file") MultipartFile file) { try { // Check if the user exists User user = userRepository.findById(userId).orElseThrow(()->new RuntimeException("User not found")); // Upload image to IDrive e2 and get image URL String imageUrl = imageService.uploadImage(file.getInputStream(), file.getSize(), file.getContentType()); // Save the image URL in the user's profile user.setUser_photo(imageUrl); userRepository.save(user); return new RedirectView("/media/"+userId); } catch (IOException e) { throw new RuntimeException("Error uploading file:"+e.getMessage()); } } @PostMapping("/upload/post") public RedirectView uploadImageAsPost(@RequestParam("file") MultipartFile file, HttpSession session){ try { Long userId = (Long) session.getAttribute("user_id"); if (userId == null) { throw new RuntimeException("Not authorized"); } String imageUrl = imageService.uploadImage(file.getInputStream(), file.getSize(), file.getContentType()); User user = userRepository.findById(userId) .orElseThrow(() -> new RuntimeException("User not found")); Post post = new Post(imageUrl,user,true); postRepository.save(post); return new RedirectView("/"); } catch (IOException e) { throw new RuntimeException("Error uploading file:"+e.getMessage()); } } }
On the front end to upload the profile image I added the following:
<div class="mb-3"> <form id="image-form" th:action="@{/api/images/upload/{id}(id=${user.id})}" method="post" enctype="multipart/form-data"> Upload Image <input class="form-control" type="file" name="file" id="formFile" accept=".jpg,.jpeg,.png" onchange="autoSubmitImage()" hidden> </form> </div> <script th:inline="javascript"> /*<![CDATA[*/ const autoSubmitImage = ()=> { document.getElementById("image-form").submit(); } /*]]>*/ </script>
And the result.
This is it.
Cheers!
以上がSpring Boot と iDrive E3 を使用して UGC アプリの画像を保存するの詳細内容です。詳細については、PHP 中国語 Web サイトの他の関連記事を参照してください。

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