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lcbasu/FirebaseImageService.java

Forked from m-cakir/FirebaseImageService.java
Created June 17, 2020 01:32
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Spring Boot - File Upload to Firebase (Google Cloud)
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application.properties
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firebase.bucket-name=MY_FIREBASE_PROJECT_BUCKET_NAME
firebase.image-url=https://storage.googleapis.com/${firebase.bucket-name}/%s
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FirebaseImageService.java
import com.google.auth.oauth2.GoogleCredentials;
import com.google.cloud.storage.Blob;
import com.google.cloud.storage.Bucket;
import com.google.firebase.FirebaseApp;
import com.google.firebase.FirebaseOptions;
import com.google.firebase.cloud.StorageClient;
import lombok.Data;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.event.EventListener;
import org.springframework.core.io.ClassPathResource;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;
import java.awt.image.BufferedImage;
import java.io.IOException;
@Service
public class FirebaseImageService implements IImageService {
@Autowired
Properties properties;
@EventListener
public void init(ApplicationReadyEvent event) {
// initialize Firebase
try {
ClassPathResource serviceAccount = new ClassPathResource("firebase.json");
FirebaseOptions options = new FirebaseOptions.Builder()
.setCredentials(GoogleCredentials.fromStream(serviceAccount.getInputStream()))
.setStorageBucket(properties.getBucketName())
.build();
FirebaseApp.initializeApp(options);
} catch (Exception ex) {
ex.printStackTrace();
}
}
@Override
public String getImageUrl(String name) {
return String.format(properties.imageUrl, name);
}
@Override
public String save(MultipartFile file) throws IOException {
Bucket bucket = StorageClient.getInstance().bucket();
String name = generateFileName(file.getOriginalFilename());
bucket.create(name, file.getBytes(), file.getContentType());
return name;
}
@Override
public String save(BufferedImage bufferedImage, String originalFileName) throws IOException {
byte[] bytes = getByteArrays(bufferedImage, getExtension(originalFileName));
Bucket bucket = StorageClient.getInstance().bucket();
String name = generateFileName(originalFileName);
bucket.create(name, bytes);
return name;
}
@Override
public void delete(String name) throws IOException {
Bucket bucket = StorageClient.getInstance().bucket();
if (StringUtils.isEmpty(name)) {
throw new IOException("invalid file name");
}
Blob blob = bucket.get(name);
if (blob == null) {
throw new IOException("file not found");
}
blob.delete();
}
@Data
@Configuration
@ConfigurationProperties(prefix = "firebase")
public class Properties {
private String bucketName;
private String imageUrl;
}
}
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IImageService.java
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.UUID;
public interface IImageService {
String getImageUrl(String name);
String save(MultipartFile file) throws IOException;
String save(BufferedImage bufferedImage, String originalFileName) throws IOException;
void delete(String name) throws IOException;
default String getExtension(String originalFileName) {
return StringUtils.getFilenameExtension(originalFileName);
}
default String generateFileName(String originalFileName) {
return UUID.randomUUID().toString() + getExtension(originalFileName);
}
default byte[] getByteArrays(BufferedImage bufferedImage, String format) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
ImageIO.write(bufferedImage, format, baos);
baos.flush();
return baos.toByteArray();
} catch (IOException e) {
throw e;
} finally {
baos.close();
}
}
}
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ImageController.java
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@Autowired
IImageService imageService;
@PostMapping
public ResponseEntity create(@RequestParam(name = "file") MultipartFile[] files) {
for (MultipartFile file : files) {
try {
String fileName = imageService.save(file);
String imageUrl = imageService.getImageUrl(fileName);
// do whatever you want with that
} catch (Exception e) {
// throw internal error;
}
}
return ResponseEntity.ok().build();
}
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pom.xml
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<dependency>
<groupId>com.google.firebase</groupId>
<artifactId>firebase-admin</artifactId>
<version>6.10.0</version>
</dependency>
<dependency>
<groupId>com.google.cloud</groupId>
<artifactId>google-cloud-storage</artifactId>
<version>1.96.0</version>
</dependency>
<dependency>
<groupId>com.google.api-client</groupId>
<artifactId>google-api-client</artifactId>
<version>1.30.4</version>
</dependency>
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