[dancer-users] HTTP 504 Gateway Time-out when running Dancer2 app as cgi-script

[Maxwell Carey]

I followed the instructions in the Dancer2 deployment guide for running 
as a cgi-script 
<http://search.cpan.org/%7Esukria/Dancer2-0.01/lib/Dancer2/Deployment.pod#Running_as_a_cgi-script_%28or_fast-cgi%29> 
but I am getting HTTP 504 Gateway Time-out when I try to access my 
application in a browser. I am brand new to the world of PSGI/Plack so I 
could be way off in my diagnosis, but it looks like when I request

http://<hostname>/

from a remote host, dispatch.cgi starts up a server listening on port 
3000 and then just sits there waiting for input until the request times 
out. Here's what I see in my Apache error log:

[Mon Nov 04 09:44:32 2013] [error] [client 128.117.20.57] 
[ip2map:30142]  core @2013-11-04 09:44:32> Registered 
Dancer2::Core::DSL__WITH__Dancer2::Plugin::Ajax=HASH(0x3414560) in 
/var/www/ip2map/public/../lib/ip2map.pm l. 3
[Mon Nov 04 09:44:32 2013] [error] [client 128.117.20.57] 
[ip2map:30142]  core @2013-11-04 09:44:32> Registered 
Dancer2::Core::DSL__WITH__Dancer2::Plugin::Ajax__WITH__Dancer2::Plugin::Database=HASH(0x3414560) 
in /var/www/ip2map/public/../lib/ip2map.pm l. 4
[Mon Nov 04 09:44:32 2013] [error] [client 128.117.20.57] >> Dancer2 
v0.10 server 30142 listening on http://0.0.0.0:3000
[Mon Nov 04 09:44:32 2013] [error] [client 128.117.20.57] >> 
Dancer2::Plugin::Ajax (0.10)
[Mon Nov 04 09:44:32 2013] [error] [client 128.117.20.57] >> 
Dancer2::Plugin::Database (2.10)
[Mon Nov 04 09:45:32 2013] [warn] [client 128.117.20.57] Timeout waiting 
for output from CGI script /var/www/ip2map/public/dispatch.cgi
[Mon Nov 04 09:45:32 2013] [error] [client 128.117.20.57] Script timed 
out before returning headers: dispatch.cgi

Here is my Apache configuration (Apache v2.2.15):

NameVirtualHost *:80

<VirtualHost *:80>
     ServerName mcmes21.cgd.ucar.edu
     ServerAlias mcmes21
     DocumentRoot /var/www/ip2map/public
     ServerAdmin mcarey at ucar.edu

     <Directory "/var/www/ip2map/public">
        AllowOverride None
        Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
        Order allow,deny
        Allow from all
        AddHandler cgi-script .cgi
     </Directory>

     RewriteEngine On
     RewriteCond %{REQUEST_FILENAME} !-f
     RewriteRule ^(.*)$ /dispatch.cgi$1 [QSA,L]

     ErrorLog  /var/log/httpd/ip2map-error_log
     CustomLog /var/log/httpd/ip2map-access_log common
</VirtualHost>

Note that my application works fine when served with Starman via 
mod_proxy with the following Apache configuration:

NameVirtualHost *:80

<VirtualHost *:80>
     ServerName mcmes21.cgd.ucar.edu
     ServerAlias mcmes21

     DocumentRoot /var/www/ip2map

     <Proxy *>
         Order deny,allow
         Allow from all
     </Proxy>

     ProxyPass        / http://localhost:5000/
     ProxyPassReverse / http://localhost:5000/
</VirtualHost>

Does anyone know how I can get this working as CGI?

--Max
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