from django.views.decorators.csrf import csrf_exempt
from django.views.decorators.http import require_POST
from django.http import HttpResponseBadRequest, HttpResponseServerError, HttpResponse
from .models import WebMentionResponse
from .resolution import url_resolves, fetch_and_validate_source, SourceFetchError, TargetNotFoundError
@csrf_exempt
@require_POST
def receive(request):
if "source" in request.POST and "target" in request.POST:
source = request.POST.get("source")
target = request.POST.get("target")
webmention = None
if not url_resolves(target):
return HttpResponseBadRequest("Target URL did not resolve to a resource on the server")
try:
try:
webmention = WebMentionResponse.objects.get(source=source, response_to=target)
except WebMentionResponse.DoesNotExist:
webmention = WebMentionResponse()
response_body = fetch_and_validate_source(source, target)
webmention.update(source, target, response_body)
return HttpResponse("The webmention was successfully received", status=202)
except (SourceFetchError, TargetNotFoundError) as e:
webmention.invalidate()
return HttpResponseBadRequest(str(e))
except Exception as e:
return HttpResponseServerError(str(e))
else:
return HttpResponseBadRequest("webmention source and/or target not in request")
