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2.3 Using JOH in CGI Mode
The ‘CGI’ mode is a bit more complicated, because it involves
configuring two components. However, the default settings are chosen
so as to simplify the configuration. First, select the socket to use
for interprocess communication between johd
and
joh.cgi
. If both processes run on the same box, then
‘localhost’ or some UNIX socket is a natural choice. Now, start the
daemon:
Make sure the socket 127.0.0.1:1100 is accessible from localhost. In
particular, if your ‘/etc/hosts.deny’ contains the line
‘ALL: ALL’, place this in your ‘/etc/hosts.allow’:
Similarly, make sure outgoing connections to selected Jabber
servers are allowed for localhost:
| johd/jabber@213.130.31.41: 127.0.0.1
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Then copy joh.cgi
to your ‘cgi-bin’ directory and
you're done. You might also wish to configure your HTTP server to use
some good-looking alias for that. For example, in my Apache
configuration I use:
| Alias /http-poll /var/www/cgi-bin/joh.cgi
|
If your HTTP server and johd
are running on different
machines, you will need to inform joh.cgi
about the
address johd
is listening on. Suppose, for example, that
johd
is running on machine ‘A’ and is listening on
IP address 192.168.0.1, port 1100. The HTTP server is running on
the machine ‘B’, which has IP address 192.168.0.2. To tell
joh.cgi
it must connect to ‘192.168.0.1:1100’, set
the environment variable JOH_SERVER_URL
. For example, if
‘B’ is running Apache, then in your ‘httpd.conf’ you would
set:
| SetEnv JOH_SERVER_URL 192.168.0.1:1100
|
Notice also, that you need to ensure that this socket on the box
‘A’ is accessible only to 192.168.0.2. For example:
- In ‘/etc/hosts.deny’:
- In ‘/etc/hosts.allow’:
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March, 31 2011 using
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