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For a project I'm doing, I will have files stored in Google's Cloud Storage and am building a web app to interface to those files. I would like my app to show a list of the files (or objects may be the appropriate name) stored in my bucket. I'm completely new to web development and google apis.

I've been researching how to do this and have found this bit of code...

Storage storage = new Storage(httpTransport, jsonFactory, credential);
    ObjectsList list = storage.objects().list("bucket-name").execute();
    for (Object obj : list.getItems()) {

      }

and it is stated to use an AppIdentityCredential.

Any advice on how to use the above code along with an AppIdentityCredential or any advice on listing files stored in a bucket using java would be greatly appreciated.

This should help you.

Please remember that you need the Cloud Storage API and not the GAE API (just FYI :) . You can read about that API here -> https://developers.google.com/storage/docs/json_api/v1/json-api-java-samples (JSON, there is also a XML API)

ls - List providers, buckets, or objects, This should help you. Please remember that you need the Cloud Storage API and not the GAE API (just FYI :) . You can read about that API  Deploy file systems on AWS and nearly eliminate set-up and processing times. EFS stores file data with industry leading security, at a lower cost.

The easiest way to access Google Cloud Storage buckets from Java is to use the NIO Filesystem Provider for Google Cloud Storage.

The link shows how to add the dependency to your project and set things up. Then, to list the files in a bucket:

try (FileSystem fs = CloudStorageFileSystem.forBucket("bucket-name")) {
  for (Path path : Files.newDirectoryStream(fs.getPath("folder-name/"))) {
        System.out.println(path);
      }
}

I haven't tried this in AppEngine itself, but I tested it outside and it works.

File listing from google cloud storage, Listing objects in a bucket is disallowed for rules_version = "1". Please update storage security rules to rules_version = "2" to use  Fast answers on Teoma.us! Find how to use google cloud storage. Content updated daily for how to use google cloud storage.

Following gist would do the trick to list all files/folders in a Google Cloud Storage bucket:

https://gist.github.com/hkarakose/d8f9ff78f7deb692e5302e06e8612ca6

You need following maven dependency to run the code:

<dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud</artifactId>
  <version>0.8.0</version>
</dependency>

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Manage Files in Google Cloud Storage With Python, if a file is in certain folder of my Google Cloud Storage, the basic idea https://​developers.google.com/storage/docs/gspythonlibrary#listing-  Console. Open the Cloud Storage browser in the Google Cloud Console. Open the Cloud Storage browser. In the bucket list, click on the name of the bucket whose contents you want to view. Optionally, use the Filter by name prefix field to narrow the results in your bucket list to only objects with the

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google-cloud-java/StorageExample.java at master · googleapis , A GCS data source can connect to a single text file, in CSV format, or to a folder stored in your Google Cloud Storage bucket. If you  Google Cloud provides a full range of services to satisfy all of your storage needs with file, block, object, and mobile application storage options.

Comments
  • Were you able to find out how to list objects using above method. I really need to get this working. Any help is appreciated. Thanks!!
  • Links are dead. Any idea of new ones?
  • Fixed Links, Thanks!