I'm happy that you managed to change over to google cloud storage quickly and without too much of an issue. Blobstore is deprecated and should be avoided as much as possible.
Out of curiosity: was it the case that you were creating an upload url from one project while the cloud storage bucket was in a different project? I was using this setup and it worked perfectly until last Thursday (I had to give "storage.objectAdmin" access to the AppEngine service account in the project hosting the storage bucket), but then it stopped working. Support is still investigating but my short-term fix was to use a bucket in the same project as the AppEngine application. Attila -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/ee7c9442-9d0c-47e3-9328-45812fb6f569%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
