Example of how to upload images into a Google Cloud Storage with Groovy

googlecloudstorage

@Grapes([
    @Grab(group='com.google.cloud', module='google-cloud-storage', version='1.31.0'),
    @Grab(group='com.google.auth', module='google-auth-library-credentials', version='0.9.1')
])
import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.BucketInfo;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.Storage.BucketGetOption;
import com.google.cloud.storage.Blob;
import com.google.cloud.storage.StorageOptions;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.api.gax.paging.Page;
import com.google.cloud.storage.Bucket.BlobWriteOption;
import com.google.cloud.storage.Storage.PredefinedAcl;

String serviceAccountJSON = "<PATH_TO_YOUR_JSON_FILE_WITH_CREDENTIALS>"

Storage storage = StorageOptions.newBuilder()
            .setProjectId("<YOUR_PROJECT_ID>")
            .setCredentials(GoogleCredentials.fromStream(new FileInputStream(serviceAccountJSON)))
            .build()
            .getService();

final String BUCKET_NAME = "<YOUR_BUCKET_NAME>"
Bucket bucket = storage.get(BUCKET_NAME) 

Page<Blob> blobs = bucket.list()

for (Blob blob : blobs.iterateAll()){
        println """{
    "name":"${blob.name}",
    "size":"${blob.size}",
    "downloadUrl":"${blob.mediaLink}",
    "selfLink":"${blob.selfLink}"
    "storageClass":"${blob.storageClass}"
    "publicUrl":"https://storage.googleapis.com/${BUCKET_NAME}/${blob.name}"
}"""
}


//Uploading a file
InputStream content = new ByteArrayInputStream("Hello, World!".getBytes("UTF8"));
Blob blob = bucket.create("filename.txt", content);
storage.update(blob.toBuilder().setMetadata(["Content-Type":"text/plain"]).build())

String folderLocation = "<A_FOLDER_WITH_SOME_IMAGES>"

//Uploading an image
String fileName1 = "Barney.jpg"
FileInputStream fis1 = new FileInputStream(new File(folderLocation+fileName1)) 
bucket.create("Barney.jpg", fis1, URLConnection.guessContentTypeFromName(fileName1)?:URLConnection.guessContentTypeFromStream(fis1), Bucket.BlobWriteOption.predefinedAcl(Storage.PredefinedAcl.PUBLIC_READ));