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!
The above is the detailed content of Storing images for your UGC app using Spring Boot and iDrive E3. For more information, please follow other related articles on the PHP Chinese website!

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