get_uploads from Blobstore Upload returns empty list although file shows up in bucket

Question

I've recently deployed my python GAE app from the development server and my image upload function stopped working properly...

After a bit of testing, it seems that the get_uploads function from blobstore is returning an empty list and hence I get an out of index error from the upload handler (also tried the get_file_infos function and had the same result)

However, when I check the GCS browser, the file is properly uploaded so my problem seems to be that I can't find a way to extract the image link from the post to Upload Handler

Anybody have clues as to why this is happening? and if there's a way around this?

(The form uses a post method with multipart/form-data so hopefully that isn't an issue)

Here's the function I'm calling to post to the upload handler:

upload_url = blobstore.create_upload_url('/upload', gs_bucket_name='BUCKET')
result = urlfetch.fetch(url= upload_url,
                        payload=self.request.body,
                        method=urlfetch.POST,
                        headers=self.request.headers)

And here's the code for the upload handler:

class UploadHandler(blobstore_handlers.BlobstoreUploadHandler):
    def post(self):
        upload_files = self.get_uploads('file')
        blob_info = upload_files[0]
        self.response.write(str(blob_info.key()))

voscausa voscausa · Accepted Answer · 2015-08-31T14:02:34

What do you try to do?

It looks like you try to post a received body to GCS. Why not write it using the Google Cloud Storage Client Library.

with gcs.open(gcs_filename, 'w', content_type, options={b'x-goog-acl': b'public-read'}) as f:
    f.write(blob)

get_uploads from Blobstore Upload returns empty list although file shows up in bucket

1 Answers