Google Cloud Storage has a feature called Signed URLs, which allows you to use your private key file to authorize access to a specific operation to a third-party.
Putting all the bits together to create a properly signed URL can be a bit tricky, so I wrote a Python example that we just open-sourced in a repository called storage-signedurls-python. It demonstrates signing a PUT, GET, and DELETE request to Cloud Storage.
The example uses the awesome requests module for its HTTP operations and PyCrypto for its RSA signing methods.
