Gecko [ fernandoquevedodop.com ]

Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
__init__.py	22 B	-rw-r--r--
compatibility.py	1.56 KB	-rw-r--r--
current_thread_executor.py	2.74 KB	-rw-r--r--
local.py	4.74 KB	-rw-r--r--
py.typed	0 B	-rw-r--r--
server.py	5.86 KB	-rw-r--r--
sync.py	18.85 KB	-rw-r--r--
testing.py	3.05 KB	-rw-r--r--
timeout.py	3.36 KB	-rw-r--r--
typing.py	5.47 KB	-rw-r--r--
wsgi.py	6.42 KB	-rw-r--r--

Code Editor : compatibility.py

import asyncio
import inspect

def is_double_callable(application):
    """
    Tests to see if an application is a legacy-style (double-callable) application.
    """
    # Look for a hint on the object first
    if getattr(application, "_asgi_single_callable", False):
        return False
    if getattr(application, "_asgi_double_callable", False):
        return True
    # Uninstanted classes are double-callable
    if inspect.isclass(application):
        return True
    # Instanted classes depend on their __call__
    if hasattr(application, "__call__"):
        # We only check to see if its __call__ is a coroutine function -
        # if it's not, it still might be a coroutine function itself.
        if asyncio.iscoroutinefunction(application.__call__):
            return False
    # Non-classes we just check directly
    return not asyncio.iscoroutinefunction(application)

def double_to_single_callable(application):
    """
    Transforms a double-callable ASGI application into a single-callable one.
    """

async def new_application(scope, receive, send):
        instance = application(scope)
        return await instance(receive, send)

return new_application

def guarantee_single_callable(application):
    """
    Takes either a single- or double-callable application and always returns it
    in single-callable style. Use this to add backwards compatibility for ASGI
    2.0 applications to your server/test harness/etc.
    """
    if is_double_callable(application):
        application = double_to_single_callable(application)
    return application

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Code Editor : compatibility.py