Hello,
I believe I have found an issue in Apache/2.2 mod_proxy when using
balancers and ProxyPass balancer in conjunction with web Sockets.
The issue is that mod_proxy seems not to pass the following headers
Connection
Upgrade
When a client sends a ws handshake request as the following
GET /WTEST/jms HTTP/1.1\r\n
Sec-WebSocket-Key1: 1 5 416 H4J50 60\r\n
Connection: Upgrade\r\n
Upgrade: WebSocket\r\n
Origin: http://localhost\r\n
Sec-WebSocket-Key2: 48 91 083 N0 Z5\r\n
Host: localhost\r\n
\r\n
mod_proxy passes to one of members balancer the following
GET /WTEST/jms HTTP/1.1\r\n
Host: localhost\r\n
Sec-WebSocket-Key1: 1 5 416 H4J50 60\r\n
Origin: http://localhost\r\n
Sec-WebSocket-Key2: 48 91 083 N0 Z5\r\n
X-Forwarded-For: 127.0.0.1\r\n
X-Forwarded-Host: localhost\r\n
X-Forwarded-Server: 127.0.1.1\r\n
Connection: Keep-Alive\r\n
\r\n
The missing headers are fundamentals for the Web Sockets protocol handshake.
I wonder if it is possible to configure mod_proxy to pass the missing
headers. My current configuration is as follow
ProxyRequests Off
ProxyPreserveHost On
<Proxy *>
Order deny,allow
Allow from all
</Proxy>
<Proxy balancer://gf>
BalancerMember http://localhost:8080
</Proxy>
<VirtualHost *:80>
<Location />
ProxyPass balancer://gf/ lbmethod=byrequests
</Location>
</VirtualHost>
Please let me know if you need more details on this as I captured the
traffic between client-> Apache -> balancer using wireshark
I also wonder if there is any on going work to make mod_proxy web sockets aware.
Thank you
--
Oscar Cassetti
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