Firebase 云存储 Java Admin SDK 上传包含 contentType 的文件

Question

我可以使用 Firebase Admin SDK 在 Google 云存储上上传文件。但是，我无法为文件设置正确的 contentType，上传的文件默认为 application/octet-stream。我无法使用 Java Admin SDK 设置正确的 contentType/metadata 的任何文档。如何更改默认的 contentType？

这是我上传文件的代码片段。

Date date = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd_HH:mm:ss");
String timestamp = dateFormat.format(date);
StorageClient storageClient = StorageClient.getInstance();
Bucket storageBucket = storageClient.bucket();

// Not sure if I'm doing this correctly
BlobInfo blobInfo = BlobInfo.newBuilder(storageBucket.getName(), "filename")
        .setContentType("vnd.ms-excel").build();

// File upload task
storageClient.bucket().create(backupFolderPath + fileNamePrefix + "_" + timestamp + ".csv", file);

Answer 1

原来我需要使用 Google Cloud Storage API. The docs 因为 Admin SDK 的 Firebase 云存储是贫瘠的。我希望文档更清楚。

这是我如何修改文件上传的 contentType 的片段。这将 contentType 从 application/octet-stream 更改为 text/csv

Date date = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd_HH:mm:ss");
String timestamp = dateFormat.format(date);
StorageClient storageClient = StorageClient.getInstance();

try {
  String bucketName = "<YOUR_BUCKET_NAME>";
  String objectName = backupFolderPath + fileNamePrefix + "_" + timestamp + ".csv";
  BlobId blobId = BlobId.of(bucketName, objectName);
  
  // Configure BlobInfo
  BlobInfo blob = BlobInfo.newBuilder(blobId)
      .setContentType("text/csv")
      .setContentEncoding("utf-8").build();

  // Use fetch `storage` from the bucket
  // https://cloud.google.com/storage/docs/uploading-objects#storage-upload-object-code-sample
  storageClient.bucket().getStorage().create(blob, 
      Files.readAllBytes(Paths.get("backup/accounts.csv")));
} catch (IOException e) {
  logger.error(">>>>> Message from Scheduled Job " + e);
}

我仍然无法在 Firebase Storage dashboard, but the uploaded file can be downloaded through Google Cloud Storage dashboard 下载上传的文件。

Firebase 云存储 Java Admin SDK 上传包含 contentType 的文件

Firebase Cloud Storage Java Admin SDK upload file with contentType

java

google-cloud-storage

firebase-storage