Added doc_serve signal

wagtail/wagtaildocs/models.py

@@ -5,6 +5,7 @@ from taggit.managers import TaggableManager
 from django.db import models
 from django.db.models.signals import pre_delete
 from django.dispatch.dispatcher import receiver
+from django.dispatch import Signal
 from django.core.urlresolvers import reverse
 from django.conf import settings
 from django.utils.translation import ugettext_lazy  as _
@@ -56,3 +57,6 @@ class Document(models.Model, TagSearchable):
 def image_delete(sender, instance, **kwargs):
     # Pass false so FileField doesn't save the model.
     instance.file.delete(False)
+
+
+doc_serve = Signal(providing_args=['request'])

wagtail/wagtaildocs/views/serve.py

@@ -2,7 +2,7 @@ from django.shortcuts import get_object_or_404
 from django.core.servers.basehttp import FileWrapper
 from django.http import HttpResponse
 
-from wagtail.wagtaildocs.models import Document
+from wagtail.wagtaildocs.models import Document, doc_serve
 
 
 def serve(request, document_id, document_filename):
@@ -15,4 +15,7 @@ def serve(request, document_id, document_filename):
     response['Content-Disposition'] = 'attachment; filename=%s' % doc.filename
     response['Content-Length'] = doc.file.size
 
+    # Send doc_serve signal
+    doc_serve.send(sender=doc, request=request)
+
     return response