[docs]class XForwardedHostMiddleware:
"""
A WSGI middleware that changes the HTTP host header in the WSGI environ
based on the X-Forwarded-Host header IF found
"""
[docs] def __init__(self, app, global_conf=None):
self.app = app
def __call__(self, environ, start_response):
if x_forwarded_host := environ.get("HTTP_X_FORWARDED_HOST", None):
environ["ORIGINAL_HTTP_HOST"] = environ.get("HTTP_HOST")
environ["HTTP_HOST"] = x_forwarded_host.split(", ", 1)[0]
if x_forwarded_for := environ.get("HTTP_X_FORWARDED_FOR", None):
environ["ORIGINAL_REMOTE_ADDR"] = environ.get("REMOTE_ADDR")
environ["REMOTE_ADDR"] = x_forwarded_for.split(",", 1)[0].strip()
x_forwarded_proto = environ.get("HTTP_X_FORWARDED_PROTO", None)
if x_forwarded_proto:
x_forwarded_proto = x_forwarded_proto.split(",", 1)[0].strip()
if x_url_scheme := environ.get("HTTP_X_URL_SCHEME", x_forwarded_proto):
environ["original_wsgi.url_scheme"] = environ["wsgi.url_scheme"]
environ["wsgi.url_scheme"] = x_url_scheme
return self.app(environ, start_response)