27 lines
858 B
Python
27 lines
858 B
Python
class BaseMiddleware:
|
|
"""
|
|
Base class for implementing ASGI middleware. Inherit from this and
|
|
override the setup() method if you want to do things before you
|
|
get to.
|
|
|
|
Note that subclasses of this are not self-safe; don't store state on
|
|
the instance, as it serves multiple application instances. Instead, use
|
|
scope.
|
|
"""
|
|
|
|
def __init__(self, inner):
|
|
"""
|
|
Middleware constructor - just takes inner application.
|
|
"""
|
|
self.inner = inner
|
|
|
|
async def __call__(self, scope, receive, send):
|
|
"""
|
|
ASGI application; can insert things into the scope and run asynchronous
|
|
code.
|
|
"""
|
|
# Copy scope to stop changes going upstream
|
|
scope = dict(scope)
|
|
# Run the inner application along with the scope
|
|
return await self.inner(scope, receive, send)
|