Add utility to get IP address

src/pretix/helpers/http.py

@@ -1,3 +1,4 @@
+from django.conf import settings
 from django.http import StreamingHttpResponse
 
 
@@ -9,3 +10,12 @@ class ChunkBasedFileResponse(StreamingHttpResponse):
         streaming_content = streaming_content.chunks(self.block_size)
         super().__init__(streaming_content, *args, **kwargs)
         self['Content-Length'] = filelike.size
+
+
+def get_client_ip(request):
+    ip = request.META.get('REMOTE_ADDR')
+    if settings.TRUST_X_FORWARDED_FOR:
+        x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')
+        if x_forwarded_for:
+            ip = x_forwarded_for.split(',')[0]
+    return ip