From 2e2be463f87871cf36f5b72e7cf32e8c67caa67f Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Fri, 11 Mar 2016 10:29:05 +0000
Subject: [PATCH] Make key client send a Host header

---
 synapse/crypto/keyclient.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/synapse/crypto/keyclient.py b/synapse/crypto/keyclient.py
index 784d02f12..54b83da9d 100644
--- a/synapse/crypto/keyclient.py
+++ b/synapse/crypto/keyclient.py
@@ -36,6 +36,7 @@ def fetch_server_key(server_name, ssl_context_factory, path=KEY_API_V1):
 
     factory = SynapseKeyClientFactory()
     factory.path = path
+    factory.host = server_name
     endpoint = matrix_federation_endpoint(
         reactor, server_name, ssl_context_factory, timeout=30
     )
@@ -81,6 +82,8 @@ class SynapseKeyClientProtocol(HTTPClient):
         self.host = self.transport.getHost()
         logger.debug("Connected to %s", self.host)
         self.sendCommand(b"GET", self.path)
+        if self.host:
+            self.sendHeader(b"Host", self.host)
         self.endHeaders()
         self.timer = reactor.callLater(
             self.timeout,