From 6c1a77eeccb0dd79ba97a1206a320d0d34ac8282 Mon Sep 17 00:00:00 2001
From: Griatch <griatch@gmail.com>
Date: Mon, 23 Mar 2020 23:20:27 +0100
Subject: [PATCH] Fix traceback in x-forward-for in cases of localhost

---
 evennia/server/webserver.py | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/evennia/server/webserver.py b/evennia/server/webserver.py
index 4dc3f71e35..ff7f61baa0 100644
--- a/evennia/server/webserver.py
+++ b/evennia/server/webserver.py
@@ -70,14 +70,15 @@ class HTTPChannelWithXForwardedFor(http.HTTPChannel):
         Check to see if this is a reverse proxied connection.
 
         """
-        CLIENT = 0
-        http.HTTPChannel.allHeadersReceived(self)
-        req = self.requests[-1]
-        client_ip, port = self.transport.client
-        proxy_chain = req.getHeader("X-FORWARDED-FOR")
-        if proxy_chain and client_ip in _UPSTREAM_IPS:
-            forwarded = proxy_chain.split(", ", 1)[CLIENT]
-            self.transport.client = (forwarded, port)
+        if self.requests:
+            CLIENT = 0
+            http.HTTPChannel.allHeadersReceived(self)
+            req = self.requests[-1]
+            client_ip, port = self.transport.client
+            proxy_chain = req.getHeader("X-FORWARDED-FOR")
+            if proxy_chain and client_ip in _UPSTREAM_IPS:
+                forwarded = proxy_chain.split(", ", 1)[CLIENT]
+                self.transport.client = (forwarded, port)
 
 
 # Monkey-patch Twisted to handle X-Forwarded-For.