Htaccess: Redirect

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Revision as of 08:24, 24 November 2010 by Olajideolaolorun (talk | contribs) (Reverted edits by Upazixorys (Talk); changed back to last version by Ric)
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MPG UniCenter

.htaccess: Introduction | Site error documents | Prevent Directory Listing | Redirect | Preventing hot linking |

.htaccess - Apache directory-level configuration file

Redirect

The htaccess command Redirect is very powerful you can redirect files or complete folders. Why would you want to do this a typical example would be that you have changed the structure of your site but wish old links (saved by a user) to be redirected to your new page location or even new page name.

Redirect format

The redirect command must be on a single line with each element separated by a space it has the following format:

Redirect old_path new_path

File Redirect format

Looking at this in a little more detail using this example

Redirect /olddirectory/oldfile.html http://yoursite.com/newdirectory/newfile.html

  1. Redirect
    • This is the Apache command followed by a space
  2. /olddirectory/oldfile.html
    • This is the path to the old file you want redirected
    • It is stated in a relative file format
    • Again followed by a space
  3. http://yoursite.com/newdirectory/newfile.html
    • This is the full (URL) path of the location you want the request redirected to

You would place a Redirect command in the root htaccess file for each file you want to redirect.

Folder Redirect

Suppose that all you have done is renamed a folder (and even moved it to another location) however all the files still have their original names redirecting a folder is similar to the above for example:

Redirect /olddirectory http://yoursite.com/newdirectory

  1. Redirect
    • This is the Apache command followed by a space
  2. /olddirectory
    • This is the path to the old directory you want redirected
    • It is stated in a relative file format
    • Again followed by a space
  3. http://yoursite.com/newdirectory
    • This is the full (URL) path of the location you want the request redirected to

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Directory example 1

Using our errors folder make a copy of it and rename it to moved.

Comment Code
  1. Navigate to the root folder www.
  2. Open the .htaccess file
  3. Add the command shown on the right last line.
  4. Save the file
 
# This file provides security to the server limiting access to the localhost only.
# Comment to deactivate.

Order Deny,Allow
Deny from all
Allow from 127.0.0.1

# To allow execution of cgi scripts in this directory uncomment next two lines.

AddHandler cgi-script .pl .cgi
Options +ExecCGI

# To unlock your server, comment the next 4 lines.
# Defaults: Username = admin; Password = userver

#AuthName "Uniform Server - Secure Server Access"
#AuthType Basic
#AuthUserFile /htpasswd/www/.htpasswd
#Require valid-user

Redirect /old http://localhost/moved

Testing

  1. Run the server using Server_Start.bat
  2. In the browser address bar type http:/localhost/old
  3. You will be redirected to the folder http://localhost/moved/

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Directory example 2

Open the file not_found.html contained in folder moved add some more text to distinguish it from the original.

Testing

  1. Run the server using Server_Start.bat
  2. In the browser address bar type http:/localhost/old/not_found.html
  3. You will be redirected to the file http://localhost/moved/not_found.html

Well you get the idea experiment with files it is similar to the folder example.

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Practical Example

I was faced with this very problem UniCenter has been around for nearly two years and started to become unmanageable hence the move over to the Wiki. Many web sites link to various pages on UniCenter to avoid frustration of not finding an article; users are redirected to the appropriate page on the Wiki.

Below is a small extract from my .htaccess file you will see I am using page redirection: 

Redirect /us_35_apps/joomla/joomla_install_1.html http://wiki.uniformserver.com/index.php/Installing_Joomla
Redirect /us_35_apps/joomla/joomla_install_2.html http://wiki.uniformserver.com/index.php/Joomla_Portability

Redirect /u35_mod_ssl_2/4_hmailserver.html http://wiki.uniformserver.com/index.php/SSL_Part_2:_Installing_hMailServer
Redirect /u35_mod_ssl_2/5_hmailserver.html http://wiki.uniformserver.com/index.php/SSL_Part_2:_Configure_hMailServer

Redirect /new_users/new_users_index.html http://wiki.uniformserver.com/index.php/New_Users:_Home
Redirect /new_users/new_users_install_1.html http://wiki.uniformserver.com/index.php/New_Users:_Quick_Install_Guide
Redirect /new_users/problems_1.html http://wiki.uniformserver.com/index.php/New_Users:_Problems_Section

Tip: I first publish the Wiki pages, use a browser to view a page and copy the link into .htaccess. Similar process to obtain the redirected page.

Errors

Any typos in the .htaccess file will cause Apache to spit out the following error message: 

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.

Hence always make small changes to .htaccess and then test, makes it easier to isolate and resolve any problems.

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Ric
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