将 Base64 字符串上传到 Google Cloud Storage

Question

在我的 App Engine 方法中，我从我的 Android 应用发送了一个 base64 string，我想将该图像上传到 Google Cloud Storage。

我将字符串解码为byte[]

byte[] data = Base64.decodeBase64(base64String);

然后我创建一个Storage 对象来连接它

Storage.Builder storageBuilder = new Storage.Builder(httpTransport,new JacksonFactory(),credential);
Storage storage = storageBuilder.build();

我有存储桶名称和图像名称，但如何将 byte[] 插入存储？

Answer 1

最简单的方法是简单地将您的 byte[] 转换为 InputStream。 Java 提供 ByteArrayInputStream 就是为了这个目的。

import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.InputStreamContent;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.storage.Storage;
import com.google.api.services.storage.model.StorageObject;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.security.GeneralSecurityException;

public class ByteUploader {

  /* Simple function to upload a byte array. */
  public static void uploadByteStream(
      String bucket, String objectName, byte[] bytes, String contentType) throws Exception {
    InputStreamContent contentStream =
        new InputStreamContent(contentType, new ByteArrayInputStream(bytes));
    StorageObject objectMetadata = new StorageObject().setName(objectName);
    Storage.Objects.Insert insertRequest =
        getService().objects().insert(bucket, objectMetadata, contentStream);
    insertRequest.execute();
  }

  /* Simple no-auth service */
  private static Storage getService() throws IOException, GeneralSecurityException {
    HttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();
    return new Storage.Builder(httpTransport, JacksonFactory.getDefaultInstance(), null)
        .setApplicationName("myApplication")
        .build();
  }

  public static void main(String[] args) throws Exception {
    ByteUploader.uploadByteStream("yarbrough-test", "foobar",new byte[]{0,1,2,3,4}, "text/plain");
  }
}