Refactor gradio auth

import warnings

import json

from threading import Thread

from typing import Iterable

from fastapi import FastAPI, Response

from fastapi.middleware.cors import CORSMiddleware

    startup_timer.record("TLS")

def get_gradio_auth_creds() -> Iterable[tuple[str, ...]]:

    """

    Convert the gradio_auth and gradio_auth_path commandline arguments into

    an iterable of (username, password) tuples.

    """

    def process_credential_line(s) -> tuple[str, ...] | None:

        s = s.strip()

        if not s:

            return None

        return tuple(s.split(':', 1))

    if cmd_opts.gradio_auth:

        for cred in cmd_opts.gradio_auth.split(','):

            cred = process_credential_line(cred)

            if cred:

                yield cred

    if cmd_opts.gradio_auth_path:

        with open(cmd_opts.gradio_auth_path, 'r', encoding="utf8") as file:

            for line in file.readlines():

                for cred in line.strip().split(','):

                    cred = process_credential_line(cred)

                    if cred:

                        yield cred

def configure_sigint_handler():

    # make the program just exit at ctrl+c without waiting for anything

    def sigint_handler(sig, frame):

        if not cmd_opts.no_gradio_queue:

            shared.demo.queue(64)

        gradio_auth_creds = []

        if cmd_opts.gradio_auth:

            gradio_auth_creds += [x.strip() for x in cmd_opts.gradio_auth.strip('"').replace('\n', '').split(',') if x.strip()]

        if cmd_opts.gradio_auth_path:

            with open(cmd_opts.gradio_auth_path, 'r', encoding="utf8") as file:

                for line in file.readlines():

                    gradio_auth_creds += [x.strip() for x in line.split(',') if x.strip()]

        gradio_auth_creds = list(get_gradio_auth_creds()) or None

        # this restores the missing /docs endpoint

        if launch_api and not hasattr(FastAPI, 'original_setup'):

            ssl_certfile=cmd_opts.tls_certfile,

            ssl_verify=cmd_opts.disable_tls_verify,

            debug=cmd_opts.gradio_debug,

            auth=[tuple(cred.split(':')) for cred in gradio_auth_creds] if gradio_auth_creds else None,

            auth=gradio_auth_creds,

            inbrowser=cmd_opts.autolaunch,

            prevent_thread_lock=True,

            allowed_paths=cmd_opts.gradio_allowed_path,