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How can I access files from a Google Cloud Storage bucket from a browser?

I am using Google Cloud Storage to store images for my Google App Engine application and I'm trying to access the images like so:

<img src="https://storage.googleapis.com/BUCKET_NAME/IMAGE_NAME">

However, this displays "Access Denied" or presents me with a Google login prompt. Then I tried using Signed URLs to grant the client access.

I generated the URL to be signed like so:

String HTTP_Verb = "GET";
String Expiration = "1361993085";
String Canonicalized_Resource = "/bucket_name/sub_directory";
String stringToSign = HTTP_Verb + "\n" + Expiration + "\n" + Canonicalized_Resource;

And then generated Base64 with the p12 file and compiled using Java, but I got this error:

The request signature we calculated does not match the signature you provided. Check your Google secret key and signing method.

What am I doing wrong here? Is there way I can access images from GCS without authentication?

like image 445
Abraham K Avatar asked Nov 21 '13 12:11

Abraham K


3 Answers

For a more general answer, the way to access an gs:// url is to use this format:

https://console.cloud.google.com/storage/browser/[BUCKET_NAME]/

For example, if the bucket you're trying to access is the Landsat public dataset,gs://gcp-public-data-landsat/ then you'd access the bucket with this url: https://console.cloud.google.com/storage/gcp-public-data-landsat/

Here's the documentation related to accessing a bucket:

  1. https://cloud.google.com/storage/docs/access-public-data
  2. https://cloud.google.com/storage/docs/cloud-console

Hope this helps!

like image 190
Ryan Chase Avatar answered Nov 09 '22 18:11

Ryan Chase


And finally after 2 days, got it working.here is the answer: My approach for this is wrong, no need for signed URL. i need to just add my bucket as public-read so that i can read it from browser request. thats all. open gsutil, type this:

gsutil -m acl -r set public-read gs://BUCKET_NAME

and set this as default for all future uploads

gsutil -m defacl set public-read gs://BUCKET_NAME

hope it helps someone !

Thanks to @kctang !

like image 33
2 revs, 2 users 92% Avatar answered Nov 09 '22 16:11

2 revs, 2 users 92%


gsutil has been updated and you now need to do:

gsutil -m acl -r set public-read gs://bucket-name
gsutil -m defacl set public-read gs://bucket-name

P.S. For people unfamiliar with gsutil, here is how to install it.

like image 9
Bardi Harborow Avatar answered Nov 09 '22 17:11

Bardi Harborow