Use .htaccess to change the url example.com/mobile to m.example.com

.htaccessrewrite

I have am setting up a social network script, it has both a desktop and a mobile version of the site. When a mobile device tries to browse the site, the mobile page is served with the url www.example.com/mobile I want a .htaccess rewrite rule that can change all the www.example.com/mobile url to m.example.com without actually redirecting to the subdomain m
This is what I could come up with

RewriteCond %{HTTP_HOST} ^m.example.com RewriteRule (.*) http://www.example.com/mobile/$1 [R=301,L]

But i am getting an error… Rewitecond: Bad flag delimiters How do I fix this or what would be a better way to do this?

P.S I dont have a .htaccess file I am setting up these rules directly inside the httpd.conf directive. I don't think that is going to make any difference but just thought it would be better to mention… just in case.

I have since moved enabled .htaccess and taken the rewrite rules out of the httpd.conf file and tested if .htaccess works and also that mod_rewrite is enabled. I am using this code to verify that mod_rewrite is indeed enabled

<?php
ob_start();
phpinfo(INFO_MODULES);
$contents = ob_get_contents();
ob_end_clean();
var_dump(strpos($contents, 'mod_rewrite') !== false);
?>

When i run this file i get an output bool(true) Also I have noticed rewrite rules like the one below is working fine

# 301 redirect if missing www.
    RewriteCond %{HTTP_HOST} !^$
    RewriteCond %{HTTP_HOST} !^www\. [NC]
    RewriteCond %{HTTPS}s ^on(s)|
    RewriteRule ^ http%1://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

But rules these rules won't work

RewriteRule ^link([^/]*).html$ rewrite.php?link=$1 [L]
RewriteCond %{HTTP_HOST} ^m.jukpac.com 
RewriteRule (.*) http://www.jukpac.com/mobile/$1 [R=301,L]

Why are my rewrite rules only partially working? :-/

Below is a a snap of the rewrite logs

173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (2) init rewrite engine with requested uri /rewrite.php
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (1) pass through /rewrite.php
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] strip per-dir prefix: /var/www/html/rewrite.php -> rewrite.php
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] strip per-dir prefix: /var/www/html/rewrite.php -> rewrite.php
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] applying pattern '^' to uri 'rewrite.php'
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] strip per-dir prefix: /var/www/html/rewrite.php -> rewrite.php
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] applying pattern '[^/]$' to uri 'rewrite.php'
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] strip per-dir prefix: /var/www/html/rewrite.php -> rewrite.php
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] applying pattern '^link([^/]*).html$' to uri 'rewrite.php'
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] strip per-dir prefix: /var/www/html/rewrite.php -> rewrite.php
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] applying pattern '(.*)' to uri 'rewrite.php'
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] strip per-dir prefix: /var/www/html/rewrite.php -> rewrite.php
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] applying pattern '^(.*)' to uri 'rewrite.php'
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] strip per-dir prefix: /var/www/html/rewrite.php -> rewrite.php
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (3) [perdir /var/www/html/] applying pattern '^file/pic/photo/(.*)\\.(.*)$' to uri 'rewrite.php'
173.245.62.183 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a160a228/initial] (1) [perdir /var/www/html/] pass through /var/www/html/rewrite.php
108.162.222.177 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a15edb58/initial] (2) init rewrite engine with requested uri /static/ajax.php
108.162.222.177 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a15edb58/initial] (1) pass through /static/ajax.php
108.162.222.177 - - [25/Jan/2014:02:58:42 --0500] [www.jukpac.com/sid#7fd2a13364a0][rid#7fd2a15edb58/initial] (3) [perdir /var/www/html/] strip per-dir prefix: /var/www/html/static/ajax.php -> static/ajax.php

Best Answer

It looks like you get a parse error because RewriteCond statements seeks to interpret [R=301,L], although that one is intended for the RewriteRule.

Try putting them on different lines like this:

 RewriteCond %{HTTP_HOST} ^m.example.com     
 RewriteRule (.*)    http://www.example.com/mobile/$1 [R=301,L]

Related Solutions

URL rewrite with multiple parameters using .htaccess

Here you go: (note that this strips the trailing "/" for pn variables)

RewriteEngine on
RewriteBase /

RewriteRule ^category/(.*)/([0-9]+) index.php?p=/category/$1&pn=$2 [L]
RewriteRule ^category/feed(.*) index.php?p=/category/&f=feed$1 [L]
RewriteRule ^tags/(.*)/([0-9]+)/ index.php?p=$1&pn=$2 [L]
RewriteRule ^search/(.*)/([0-9]+)/ index.php?p=search&q=$1&pn=$2 [L]

... and a PHP file to simplify testing:

<html><head><title>Testing</title></head><body><pre><?php

var_dump($_GET);

echo "\r\n";

var_dump($_SERVER);

?></pre></body></html>

Update: If you plan to have variable category names and you cannot guarantee that the / character will work as a separator, you should consider handling URI parsing within your application itself.

Example rewrite directives:

RewriteEngine on
RewriteBase /

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* /index.php [L,QSA]

Example PHP file:

<?php

  $uri = $_SERVER['REQUEST_URI'];
  $uri_array = explode( "/", $uri );

  switch ( $uri_array[0] ) {
    case '':
      /* serve index page */
    break;
    case 'feed':
      switch ( $uri_array[1] ) {
          case 'atom':
              /* serve atom feed */
          break;
          case 'rss':
              /* serve RSS feed */
          break;
          default:
              /* default feed behavior */
          break;
      }
    break;
    case 'tags':
        $tags = ($uri_array[1]) ? $uri_array[1] : '';
        $page_number = ($uri_array[2]) ? $uri_array[2] : 1;
        /* tag display behavior */
    break;
    default:
        $category = ($uri_array[1]) ? $uri_array[1] : '';
        $page_number = ($uri_array[2]) ? $uri_array[2] : 1;
        /* category lookup behavior + return 404 if category not found */
    break;
  }
?>

Htaccess replaces full URL instead of REQUEST_URI

RewriteCond %{HTTPS} off
RewriteRule .* https://%{HTTP_HOST}%{REQUEST_URI} [R=301]
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule .* https://www.%{HTTP_HOST}%{REQUEST_URI} [R=301]

You need to include the L (last) flag on both of these RewriteRule directives, otherwise, processing will continue through the file and the URL will get further rewritten by the RewriteRule that follows (using the output from the previous directive). And since an external redirect has already been triggered by the preceding directives, you then get externally redirected to /utilities/template_handler.php?filename=...., rather than internally rewritten.

These directives should also be reversed to avoid an unnecessary double redirect when requesting a URL of the form http://example.com/.... (Particularly with the addition of the L flag.)

For example:

RewriteCond %{HTTP_HOST} !^www\.
RewriteRule .* https://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
RewriteCond %{HTTPS} off
RewriteRule .* https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

Note also, I've removed the NC flag from the negated !^www\. condition. Since this is a negated regex, you want it to redirect when it does not start www - all lowercase. You still want "bad" requests of the form WwW to be redirected - but if you include the NC flag here they will not.

You can include the L flag on the very last RewriteRule if you wish - although it would be good practise to do so. It is effectively implied, since it is the last rule anyway, but if you added more directives then you might need to remember to add it.

Best Answer

Related Solutions

URL rewrite with multiple parameters using .htaccess

Htaccess replaces full URL instead of REQUEST_URI

Related Topic