Wednesday, January 7, 2009

htaccess Cheat Sheet

Found this resources in this link : http://www.thejackol.com/htaccess-cheatsheet/

and its pretty usefull in controlling your FTP files and also for SEO also. :) hope it helps you.








htaccess Cheatsheet


Here is a simple cheatsheet for the .htaccess file:



Enable Directory Browsing



Options +Indexes
## block a few types of files from showing
IndexIgnore *.wmv *.mp4 *.avi


Disable Directory Browsing



Options All -Indexes


Customize Error Messages



ErrorDocument 403 /forbidden.html
ErrorDocument 404 /notfound.html
ErrorDocument 500 /servererror.html


Get SSI working with HTML/SHTML



AddType text/html .html
AddType text/html .shtml
AddHandler server-parsed .html
AddHandler server-parsed .shtml
# AddHandler server-parsed .htm


Change Default Page (order is followed!)



DirectoryIndex myhome.htm index.htm index.php


Block Users from accessing the site



<limit GET POST PUT>

order deny,allow
deny from 202.54.122.33
deny from 8.70.44.53
deny from .spammers.com
allow from all
</limit>


Allow only LAN users



order deny,allow
deny from all
allow from 192.168.0.0/24


Redirect Visitors to New Page/Directory



Redirect oldpage.html http://www.domainname.com/newpage.html
Redirect /olddir http://www.domainname.com/newdir/


Block site from specific referrers



RewriteEngine on
RewriteCond %{HTTP_REFERER} site-to-block\.com [NC]
RewriteCond %{HTTP_REFERER} site-to-block-2\.com [NC]
RewriteRule .* - [F]


Block Hot Linking/Bandwidth hogging



RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(www\.)?mydomain.com/.*$ [NC]
RewriteRule \.(gif|jpg)$ - [F]


Want to show a “Stealing is Bad” message too?



Add this below the Hot Link Blocking code:



RewriteRule \.(gif|jpg)$ http://www.mydomain.com/dontsteal.gif [R,L]


Stop .htaccess (or any other file) from being viewed



<files file-name>
order allow,deny
deny from all
</files>


Avoid the 500 Error



# Avoid 500 error by passing charset
AddDefaultCharset utf-8


Grant CGI Access in a directory



Options +ExecCGI
AddHandler cgi-script cgi pl
# To enable all scripts in a directory use the following
# SetHandler cgi-script


Password Protecting Directories



Use the .htaccess Password Generator and follow the brief instructions!



Change Script Extensions



AddType application/x-httpd-php .gne


gne will now be treated as PHP files! Similarly, x-httpd-cgi for CGI files, etc.



Use MD5 Digests



Performance may take a hit but if thats not a problem, this is a nice option to turn on.



ContentDigest On


The CheckSpelling Directive



From Jens Meiert: CheckSpelling corrects simple spelling errors (for example, if someone forgets a letter or if any character is just wrong). Just add CheckSpelling On to your htaccess file.



The ContentDigest Directive



As the Apache core features documentation says: “This directive enables the generation of Content-MD5 headers as defined in RFC1864 respectively RFC2068. The Content-MD5 header provides an end-to-end message integrity check (MIC) of the entity-body. A proxy or client may check this header for detecting accidental modification of the entity-body in transit.



Note that this can cause performance problems on your server since the message digest is computed on every request (the values are not cached). Content-MD5 is only sent for documents served by the core, and not by any module. For example, SSI documents, output from CGI scripts, and byte range responses do not have this header.”



To turn this on, just add ContentDigest On.



Save Bandwidth



# Only if you use PHP
<ifmodule mod_php4.c>
php_value zlib.output_compression 16386
</ifmodule>



Turn off magic_quotes_gpc



# Only if you use PHP
<ifmodule mod_php4.c>
php_flag magic_quotes_gpc off
</ifmodule>

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