[Bug]: Break for google gemini

[guohai]

What happened?

Issue happens when use litellm(litellm==1.43.18) with gemini hosted by Google in dAnswer.
And from my analysis, it is regarding to these snippets.
For LLM configuration, api_base is "", which is an empty string, but not None. So it goes into this branch and with the wrong value been applied.

if (
    api_base is not None
):  # for cloudflare ai gateway - https://github.com/BerriAI/litellm/issues/4317
    if custom_llm_provider == "gemini":
        url = "{}/{}".format(api_base, endpoint)
        auth_header = (
            gemini_api_key  # cloudflare expects api key as bearer token
        )
    else:
        url = "{}:{}".format(api_base, endpoint)

    if stream is True:
        url = url + "?alt=sse"

Due to that in many places, we accept the empty string as the default parameter, so I suggest that, use

if (api_base)

this checks for both None and empty string.

Relevant log output

Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/httpx/_transports/default.py", line 60, in map_httpcore_exceptions
    yield
  File "/usr/local/lib/python3.11/site-packages/httpx/_transports/default.py", line 218, in handle_request
    resp = self._pool.handle_request(req)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/httpcore/_sync/connection_pool.py", line 208, in handle_request
    raise UnsupportedProtocol(
httpcore.UnsupportedProtocol: Request URL is missing an 'http://' or 'https://' protocol.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/litellm/utils.py", line 10372, in __next__
    self.fetch_sync_stream()
  File "/usr/local/lib/python3.11/site-packages/litellm/utils.py", line 10477, in fetch_sync_stream
    self.completion_stream = self.make_call(client=litellm.module_level_client)
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/litellm/llms/vertex_httpx.py", line 555, in make_sync_call
    response = client.post(api_base, headers=headers, data=data, stream=True)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/litellm/llms/custom_httpx/http_handler.py", line 275, in post
    raise e
  File "/usr/local/lib/python3.11/site-packages/litellm/llms/custom_httpx/http_handler.py", line 266, in post
    response = self.client.send(req, stream=stream)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/httpx/_client.py", line 908, in send
    response = self._send_handling_auth(
               ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/httpx/_client.py", line 936, in _send_handling_auth
    response = self._send_handling_redirects(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/httpx/_client.py", line 973, in _send_handling_redirects
    response = self._send_single_request(request)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/httpx/_client.py", line 1009, in _send_single_request
    response = transport.handle_request(request)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/httpx/_transports/default.py", line 217, in handle_request
    with map_httpcore_exceptions():
  File "/usr/local/lib/python3.11/contextlib.py", line 158, in __exit__
    self.gen.throw(typ, value, traceback)
  File "/usr/local/lib/python3.11/site-packages/httpx/_transports/default.py", line 77, in map_httpcore_exceptions
    raise mapped_exc(message) from exc
httpx.UnsupportedProtocol: Request URL is missing an 'http://' or 'https://' protocol.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/app/danswer/chat/process_message.py", line 666, in stream_chat_message_objects
    for packet in answer.processed_streamed_output:
  File "/app/danswer/llm/answering/answer.py", line 577, in processed_streamed_output
    for processed_packet in _process_stream(output_generator):
  File "/app/danswer/llm/answering/answer.py", line 509, in _process_stream
    for message in stream:
  File "/app/danswer/llm/answering/answer.py", line 423, in _raw_output_for_non_explicit_tool_calling_llms
    yield from self._process_llm_stream(
  File "/app/danswer/llm/answering/answer.py", line 329, in _process_llm_stream
    for message in self.llm.stream(
  File "/app/danswer/llm/chat_llm.py", line 364, in _stream_implementation
    for part in response:
  File "/usr/local/lib/python3.11/site-packages/litellm/utils.py", line 10468, in __next__
    raise exception_type(
          ^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/litellm/utils.py", line 8334, in exception_type
    raise e
  File "/usr/local/lib/python3.11/site-packages/litellm/utils.py", line 8298, in exception_type
    raise APIConnectionError(
litellm.exceptions.APIConnectionError: litellm.APIConnectionError: Request URL is missing an 'http://' or 'https://' protocol.
Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/httpx/_transports/default.py", line 60, in map_httpcore_exceptions
    yield
  File "/usr/local/lib/python3.11/site-packages/httpx/_transports/default.py", line 218, in handle_request
    resp = self._pool.handle_request(req)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/httpcore/_sync/connection_pool.py", line 208, in handle_request
    raise UnsupportedProtocol(
httpcore.UnsupportedProtocol: Request URL is missing an 'http://' or 'https://' protocol.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/litellm/utils.py", line 10372, in __next__
    self.fetch_sync_stream()
  File "/usr/local/lib/python3.11/site-packages/litellm/utils.py", line 10477, in fetch_sync_stream
    self.completion_stream = self.make_call(client=litellm.module_level_client)
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/litellm/llms/vertex_httpx.py", line 555, in make_sync_call
    response = client.post(api_base, headers=headers, data=data, stream=True)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/litellm/llms/custom_httpx/http_handler.py", line 275, in post
    raise e
  File "/usr/local/lib/python3.11/site-packages/litellm/llms/custom_httpx/http_handler.py", line 266, in post
    response = self.client.send(req, stream=stream)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/httpx/_client.py", line 908, in send
    response = self._send_handling_auth(
               ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/httpx/_client.py", line 936, in _send_handling_auth
    response = self._send_handling_redirects(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/httpx/_client.py", line 973, in _send_handling_redirects
    response = self._send_single_request(request)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/httpx/_client.py", line 1009, in _send_single_request
    response = transport.handle_request(request)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/httpx/_transports/default.py", line 217, in handle_request
    with map_httpcore_exceptions():
  File "/usr/local/lib/python3.11/contextlib.py", line 158, in __exit__
    self.gen.throw(typ, value, traceback)
  File "/usr/local/lib/python3.11/site-packages/httpx/_transports/default.py", line 77, in map_httpcore_exceptions
    raise mapped_exc(message) from exc
httpx.UnsupportedProtocol: Request URL is missing an 'http://' or 'https://' protocol.



url // this is the url specified by _get_token_and_url 
https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-pro-latest:streamGenerateContent?key=AImyFakedKey4&alt=sse

True // api_base is not None
 // api_base, empty string but not None, so it goes into the wrong branch, and composes a wrong value for the url
/streamGenerateContent?alt=sse

Twitter / LinkedIn details

No response

[krrishdholakia]

fix should be live by EOD

[guohai]

Thanks @krrishdholakia.
I will try when the fix goes alive