mirror of
https://github.com/dnlbauer/django-signposting.git
synced 2026-09-10 14:05:31 +00:00
39 lines
1.1 KiB
Python
39 lines
1.1 KiB
Python
from typing import Callable
|
|
from django.http import HttpRequest, HttpResponse
|
|
from signposting import Signpost
|
|
|
|
|
|
class SignpostingMiddleware:
|
|
|
|
def __init__(self, get_response: Callable[[HttpRequest], HttpResponse]):
|
|
self.get_response = get_response
|
|
|
|
def __call__(self, request: HttpRequest) -> HttpResponse:
|
|
response = self.get_response(request)
|
|
|
|
# no signposts on errors
|
|
if response.status_code >= 400:
|
|
return response
|
|
|
|
if not hasattr(response, "_signposts"):
|
|
return response
|
|
|
|
self._add_signposts(response, response._signposts)
|
|
|
|
return response
|
|
|
|
def _add_signposts(self, response: HttpResponse, signposts: list[Signpost]):
|
|
""" Adds signposting headers to the respones.
|
|
params:
|
|
response - the response object
|
|
signposts - a list of Signposts
|
|
"""
|
|
|
|
link_snippets = []
|
|
for signpost in signposts:
|
|
link_snippets.append(f'<{signpost.target}> ; rel="{signpost.rel}"')
|
|
if signpost.type:
|
|
link_snippets[-1] += f' ; type="{signpost.type}"'
|
|
|
|
response["Link"] = " , ".join(link_snippets)
|