Switching between HTTP and HTTPS

Question:

Following statements are there in my Apache2 virtual hosts section

Redirect /host/directory/folder/login.php https://servername/host/directory/folder/login.php
Redirect /host/directory/folder/register.php https://servername/host/directory/folder/register.php

How to return to http (not https) when the above 2 pages are not involved?

Answer:

In HTTP VH:
RewriteRule /.../login.php https://.../login.php [R]
RewriteRule /.../register.php https://.../register.php [R]

In HTTPS VH:
RewriteRule /.../login.php - [S=2]
RewriteRule /.../register.php - [S=1]
RewriteRule ^/(.*) http://servername/$1 [R]

In the HTTPS VH, if you get login.php or register.php you don't rewrite it (the "-"), then you skip the next 2 or 1 RewriteRules ( [S=2], [S=1]) - that is, you skip over the general purpose rewrite back to HTTP. So login.php or register.php get served from HTTPS and everything else goes back to HTTP.

Perl Code Profiling - Apache::DProf

1. In Startup.pl:
   

      # The Apache::DProf requires this
      use Apache::Registry;

   
   
2. In conf:
   

      PerlModule Apache::DProf

   
   
3. Make sure the logs directory has write rights
   
   
4. Restart Apache & do whatever you want in the browser page
   
   
5. Stop Apache (only then the tmon.out will get complete output)
   
   
6. Go to the directory where tmon is (logs/dprof//) and run dprofpp
   

Refer: Code Profiling Techniques

Apache and strace

To display a trace of system calls. Useful for debugging.

root@sri# apachectl stop (First stop Apache and then restart Apache with strace)
root@sri# strace -f -o trace.txt /etc/rc.d/init.d/httpd start

-f: Traces child processes as they are created by currently traced processes.

-o: Outputs to a text file