I got a simple node.js websocket server:
var io = require('socket.io')(12345);
io.on('connection', function(socket){
console.log('a user connected');
socket.on('disconnect', function(){
console.log('user disconnected');
});
socket.on('test', function(msg){
console.log('test msg: ' + msg);
io.emit('test', 'Test answer');
});
});
I connect to it, and it responds correctly with iocat:
me@whatever:~/prj/client$ iocat --socketio ws://localhost:12345 -e test
> adsa
> [ 'Test answer' ]
so now I want to configure apache server's ssl to redirect a certain sub-url from my project to this websocket
I have apache configured to serve my project in https://localhost/prj
I want the websocket to be avaiable in https://localhost/prj/socket
So searching the web and SO I found 2 possible ways to do this:
1 – ProxyPass alone
<Location /prj/socket>
ProxyPass ws://localhost:12345
ProxyPassReverse ws://localhost:12345
</Location>
2- ProxyPass with rewriting
<Location /agora/socket>
RewriteEngine On
RewriteCond %{REQUEST_URI} ^/agora/socket/socket.io [NC]
RewriteCond %{QUERY_STRING} transport=websocket [NC]
RewriteRule ^/agora/socket/(.*) "ws://localhost:12345/$1" [P,L]
ProxyPass /agora/socket/socket.io ws://localhost:12345/socket.io
ProxyPassReverse /agora/socket/socket.io ws://localhost:12345/socket.io
</Location>
But none of them worked. The connection is established but the server doesn't respond:
me@whatever:~/prj/client$ iocat --socketio https://localhost/prj/socket -e teste
> asdfasd
> asdasd
>
Pages where I got this info:
https://github.com/socketio/socket.io/issues/1696
There is no error in the logs, it just wouldn't work. So increased the Apache LogLevel to see how the rules where being rewritten. I set it to LogLevel alert rewrite:trace6
. After that I got this log in webserver connection:
[Tue Aug 01 13:22:14.510992 2017] [rewrite:trace2] [pid 28400] mod_rewrite.c(476): [client 127.0.0.1:36004] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78520a0/initial] init rewrite engine with requested uri /socket.io/
[Tue Aug 01 13:22:14.511023 2017] [rewrite:trace3] [pid 28400] mod_rewrite.c(476): [client 127.0.0.1:36004] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78520a0/initial] applying pattern '^/agora/socket/(.*)' to uri '/socket.io/'
[Tue Aug 01 13:22:14.511029 2017] [rewrite:trace1] [pid 28400] mod_rewrite.c(476): [client 127.0.0.1:36004] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78520a0/initial] pass through /socket.io/
[Tue Aug 01 13:22:14.922563 2017] [rewrite:trace2] [pid 28401] mod_rewrite.c(476): [client 127.0.0.1:36010] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78520a0/initial] init rewrite engine with requested uri /socket.io/
[Tue Aug 01 13:22:14.922607 2017] [rewrite:trace3] [pid 28401] mod_rewrite.c(476): [client 127.0.0.1:36010] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78520a0/initial] applying pattern '^/agora/socket/(.*)' to uri '/socket.io/'
[Tue Aug 01 13:22:14.922616 2017] [rewrite:trace1] [pid 28401] mod_rewrite.c(476): [client 127.0.0.1:36010] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78520a0/initial] pass through /socket.io/
[Tue Aug 01 13:22:15.609710 2017] [rewrite:trace2] [pid 28403] mod_rewrite.c(476): [client 127.0.0.1:36014] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78520a0/initial] init rewrite engine with requested uri /socket.io/
[Tue Aug 01 13:22:15.609755 2017] [rewrite:trace3] [pid 28403] mod_rewrite.c(476): [client 127.0.0.1:36014] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78520a0/initial] applying pattern '^/agora/socket/(.*)' to uri '/socket.io/'
[Tue Aug 01 13:22:15.609766 2017] [rewrite:trace1] [pid 28403] mod_rewrite.c(476): [client 127.0.0.1:36014] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78520a0/initial] pass through /socket.io/
[Tue Aug 01 13:22:15.950666 2017] [rewrite:trace2] [pid 28402] mod_rewrite.c(476): [client 127.0.0.1:36020] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78500a0/initial] init rewrite engine with requested uri /socket.io/
[Tue Aug 01 13:22:15.950714 2017] [rewrite:trace3] [pid 28402] mod_rewrite.c(476): [client 127.0.0.1:36020] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78500a0/initial] applying pattern '^/agora/socket/(.*)' to uri '/socket.io/'
[Tue Aug 01 13:22:15.950724 2017] [rewrite:trace1] [pid 28402] mod_rewrite.c(476): [client 127.0.0.1:36020] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78500a0/initial] pass through /socket.io/
[Tue Aug 01 13:22:18.329478 2017] [rewrite:trace2] [pid 28399] mod_rewrite.c(476): [client 127.0.0.1:36024] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78500a0/initial] init rewrite engine with requested uri /socket.io/
[Tue Aug 01 13:22:18.329512 2017] [rewrite:trace3] [pid 28399] mod_rewrite.c(476): [client 127.0.0.1:36024] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78500a0/initial] applying pattern '^/agora/socket/(.*)' to uri '/socket.io/'
[Tue Aug 01 13:22:18.329519 2017] [rewrite:trace1] [pid 28399] mod_rewrite.c(476): [client 127.0.0.1:36024] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78500a0/initial] pass through /socket.io/
[Tue Aug 01 13:22:18.668606 2017] [rewrite:trace2] [pid 28424] mod_rewrite.c(476): [client 127.0.0.1:36030] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78520a0/initial] init rewrite engine with requested uri /socket.io/
[Tue Aug 01 13:22:18.668649 2017] [rewrite:trace3] [pid 28424] mod_rewrite.c(476): [client 127.0.0.1:36030] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78520a0/initial] applying pattern '^/agora/socket/(.*)' to uri '/socket.io/'
[Tue Aug 01 13:22:18.668658 2017] [rewrite:trace1] [pid 28424] mod_rewrite.c(476): [client 127.0.0.1:36030] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78520a0/initial] pass through /socket.io/
and this when I try to send a message:
[Tue Aug 01 13:26:55.653675 2017] [rewrite:trace2] [pid 28400] mod_rewrite.c(476): [client 127.0.0.1:37454] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78500a0/initial] init rewrite engine with requested uri /socket.io/
[Tue Aug 01 13:26:55.653723 2017] [rewrite:trace3] [pid 28400] mod_rewrite.c(476): [client 127.0.0.1:37454] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78500a0/initial] applying pattern '^/agora/socket/(.*)' to uri '/socket.io/'
[Tue Aug 01 13:26:55.653734 2017] [rewrite:trace1] [pid 28400] mod_rewrite.c(476): [client 127.0.0.1:37454] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78500a0/initial] pass through /socket.io/
[Tue Aug 01 13:26:55.987130 2017] [rewrite:trace2] [pid 28402] mod_rewrite.c(476): [client 127.0.0.1:37460] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78500a0/initial] init rewrite engine with requested uri /socket.io/
[Tue Aug 01 13:26:55.987173 2017] [rewrite:trace3] [pid 28402] mod_rewrite.c(476): [client 127.0.0.1:37460] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78500a0/initial] applying pattern '^/agora/socket/(.*)' to uri '/socket.io/'
[Tue Aug 01 13:26:55.987182 2017] [rewrite:trace1] [pid 28402] mod_rewrite.c(476): [client 127.0.0.1:37460] 127.0.0.1 - - [localhost/sid#7f48e6578ae0][rid#7f48d78500a0/initial] pass through /socket.io/
AFAIU the rewrite rule is being applyied. Anyone knows why the server isn't responding ?
Any help appreciated. Thanks.
Best Answer
The simplest things are often the hardest to find :)
I solved it with the 1st solution (use only ProxyPass):
The only problem was that I was using the ws:// protocol. When I changed to http:// it worked fine. Thanks to anyone who cared to take a look :)