Dispatch to multiple ASGI applicationsΒΆ
It is often useful serve multiple ASGI applications at once, under
differing root paths. Hypercorn does not support this directly, but
the DispatcherMiddleware included with Hypercorn can. This
middleware allows multiple applications to be served on different
mounts.
The DispatcherMiddleware takes a dictionary of applications keyed
by the root path. The order of entry in this dictionary is important,
as the root paths will be checked in this order. Hence it is important
to add /a/b before /a or the latter will match everything
first. Also note that the root path should not include the trailing
slash.
An example usage is to to serve a graphql application alongside a
static file serving application. Using the graphql app is called
graphql_app serving everything with the root path /graphql and
a static file app called static_app serving everything else i.e. a
root path of / the DispatcherMiddleware can be setup as,
from hypercorn.middleware import DispatcherMiddleware
dispatcher_app = DispatcherMiddleware({
"/graphql": graphql_app,
"/": static_app,
})
which can then be served by hypercorn,
$ hypercorn module:dispatcher_app