Incompatibility with "requests" 2.9.0, just released

[jcea]

My code worked perfectly so far, but when requests ungraded to 2.9.0, I get this exception:

  File "/usr/local/lib/python3.5/site-packages/azure/storage/blob/blobservice.py", line 1228, in put_block_blob_from_bytes
    x_ms_lease_id)
  File "/usr/local/lib/python3.5/site-packages/azure/storage/blob/blobservice.py", line 883, in put_blob
    self._perform_request(request)
  File "/usr/local/lib/python3.5/site-packages/azure/storage/storageclient.py", line 171, in _perform_request
    resp = self._filter(request)
  File "/usr/local/lib/python3.5/site-packages/azure/storage/storageclient.py", line 160, in _perform_request_worker
    return self._httpclient.perform_request(request)
  File "/usr/local/lib/python3.5/site-packages/azure/storage/_http/httpclient.py", line 181, in perform_request
    self.send_request_body(connection, request.body)
  File "/usr/local/lib/python3.5/site-packages/azure/storage/_http/httpclient.py", line 143, in send_request_body
    connection.send(request_body)
  File "/usr/local/lib/python3.5/site-packages/azure/storage/_http/requestsclient.py", line 81, in send
    self.response = self.session.request(self.method, self.uri, data=request_body, headers=self.headers, timeout=self.timeout)
  File "/usr/local/lib/python3.5/site-packages/requests/sessions.py", line 454, in request
    prep = self.prepare_request(req)
  File "/usr/local/lib/python3.5/site-packages/requests/sessions.py", line 388, in prepare_request
    hooks=merge_hooks(request.hooks, self.hooks),
  File "/usr/local/lib/python3.5/site-packages/requests/models.py", line 296, in prepare
    self.prepare_body(data, files, json)
  File "/usr/local/lib/python3.5/site-packages/requests/models.py", line 447, in prepare_body
    body = self._encode_params(data)
  File "/usr/local/lib/python3.5/site-packages/requests/models.py", line 84, in _encode_params
    return to_native_string(data)
  File "/usr/local/lib/python3.5/site-packages/requests/utils.py", line 700, in to_native_string
    out = string.decode(encoding)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xd0 in position 0: ordinal not in range(128)

[jcea]

Minimal testcase:

data = b'\xd4\x1d\x8c\xd9\x8f\x00\xb2\x04\xe9\x80\t\x98\xec\xf8B~'
blob_service.put_block_blob_from_bytes(
        container_name = 'test',
        blob_name = "test",
        blob = data,
        )

Maybe related to this change in Request 2.9.0:

We now handle being passed a query string as a bytestring on Python 3, by decoding it as UTF-8.

[lmazuel]

Thank you for your report.

After investigation it seems that it's a problem in requests, I opened a bug in the requests repo for that.
https://github.com/kennethreitz/requests/issues/2933

[jcea]

Waiting for a new requests release. I close this bug.

Thanks for your time and fast reply.