reverse proxy in apache

amartlk · 01-12-2015, 01:48 AM

i am using centos 5.3 with httpd server2.2.3 i rewrite some rule as below in httpd.conf
Rewrite rules for internal applications

ProxyPass /dotproject/ http://192.16.1.xx:24000/dotproject/
ProxyPass /dotproject http://192.16.1.xx:24000/dotproject/
ProxyPassReverse /dotproject/ http://192.16.1.xx:24000/dotproject/
ProxyPassReverse /dotproject http://192.16.1.xx:24000/dotproject/
RewriteRule ^.*dotproject$ http://40.65.10.85/dotproject/ [R]
where 40.65.10.85 is static ip from isp it work properly when i access http://40.65.10.85/dotproject/ it redirect properly and working fine .
i installed another application which using tomcat as application server i rewrite rule as
ProxyPass /tomcat http://192.16.1.xx:8080
ProxyPassReverse /tomcat http://192.16.1.xx:8080
ProxyPass /hello/ http://192.16.1.xx:8080
ProxyPass /hello http://192.16.1.xx:8080
ProxyPassReverse /hello/ http://192.16.1.xx:8080
ProxyPassReverse /hello http://192.16.1.xx:8080
RewriteRule ^.*hello$ http://40.65.10.85/hello/ [R]

it is not showing proper login page and in httpd error log shows error as error] [client 40.65.10.85] File does not exist: /var/www/html/login.jsp, referer: http://40.65.10.85/hello

bathory · 01-12-2015, 05:55 AM

Quote:

<snip>
ProxyPass /hello/ http://192.16.1.xx:8080
ProxyPass /hello http://192.16.1.xx:8080
ProxyPassReverse /hello/ http://192.16.1.xx:8080
ProxyPassReverse /hello http://192.16.1.xx:8080
RewriteRule ^.*hello$ http://40.65.10.85/hello/ [R]

The trailing slash in important in the proxied URLs, so in your case you should use:

Code:

ProxyPass /hello/ http://192.16.1.xx:8080/
ProxyPassReverse /hello/ http://192.16.1.xx:8080/

Note that you don't need to use both URLs (with and without trailing slash), you could just use:

Code:

ProxyPass /tomcat http://192.16.1.xx:8080
ProxyPassReverse /tomcat http://192.16.1.xx:8080
ProxyPass /hello http://192.16.1.xx:8080
ProxyPassReverse /hello http://192.16.1.xx:8080
RewriteRule ^.*hello$ http://40.65.10.85/hello [R]

Regards

amartlk · 01-12-2015, 07:04 AM

Thanks guru

it is now redirect to the server but on display it not shows proper image login windows etc the httpd error log shows error as
[client 40.65.10.85] File does not exist: /var/www/html/login.jsp, referer: http://40.65.10.85/hello

bathory · 01-12-2015, 09:33 AM

Quote:

it is now redirect to the server but on display it not shows proper image login windows etc the httpd error log shows error as
[client 40.65.10.85] File does not exist: /var/www/html/login.jsp, referer: http://40.65.10.85/hello

Huh, I don't think you need both reverse proxy and the RewriteRule. You should use one backp-end server (either 192.16.1.xx:8080 or 40.65.10.85) for the same URI.
Anyways you may also try to add the following and see if it helps

Code:

ProxyRequests Off
ProxyPreserveHost On

amartlk · 01-13-2015, 05:16 AM

after adding ProxyRequests Off, ProxyPreserveHost On shows requested url not found on server

bathory · 01-13-2015, 09:15 AM

Quote:

Originally Posted by amartlk

after adding ProxyRequests Off, ProxyPreserveHost On shows requested url not found on server

Without more info, I can only guess that this error comes from apache. If that's the case, then apache does not work as a reverse proxy
Check the apache and your app's (that's running on tomcat) logs and see if apache forwards requests to tomcat and who's giving that error