GoogleDriveLoader creates random ports

[Oni22]

Hi everyone,

I started to work with the GoogleDriveLoader() and I recognized that there might be an issue with the oauth flow. Let's assume the following setup:

.env file:
GOOGLE_APPLICATION_CREDENTIALS=""

main.py:

loader = GoogleDriveLoader(
        folder_id="XXXXX",
        credentials_path="XXXX/google_credentials.json",
        token_path="XXXX/google_token.json",
        recursive=False,
    )

With this setup, the GoogleDriveLoader() creates a local auth server during local development that always uses a random port. This leads to the problem that my redirect url that I configured in the Google Cloud never works. So I'm wondering why this class creates a local server and if so, why can't we set the port ourselves?

The code which creates this behavior is in line 191:

        if not creds or not creds.valid:
            if creds and creds.expired and creds.refresh_token:
                creds.refresh(Request())
            elif "GOOGLE_APPLICATION_CREDENTIALS" not in os.environ:
                creds, project = default()
                creds = creds.with_scopes(SCOPES)
                # no need to write to file
                if creds:
                    return creds
            else:
                flow = InstalledAppFlow.from_client_secrets_file(
                    str(self.credentials_path), SCOPES
                )
              # Why do we set port 0 -> leads to random port? 
             # Why do we create a local server?
                creds = flow.run_local_server(port=0) 
            with open(self.token_path, "w") as token:
                token.write(creds.to_json())

I can solve this issue by setting the port to my preffered one eg 8080. Anyone who has an idea?

[lkuligin]

let's maybe add a parameters with a default value, and throw a meaningful erorr description if the port is occupied?
it would be awesome if you could work on that, thanks!