RewriteEngine On
Options +FollowSymLinks -MultiViews
Options -Indexes

RewriteRule ^contact\.html$ /frontend-folder/contact.php [L]
RewriteRule ^([^/]*)\.html$ /frontend-folder/page.php?permalink=$1 [L]

RewriteRule ^([^/]*)/$ /frontend-folder/category.php?categ_slug=$1 [L,NC,QSA]
RewriteRule ^([^/]*)/page-([0-9]+)$ /frontend-folder/category.php?categ_slug=$1&pagenum=$2 [L]

RewriteRule ^([^/]*)/([0-9]+)-([^/]*)$ /frontend-folder/article.php?categ_slug=$1&article_id=$2&article_slug=$3 [L]


<ifModule mod_deflate.c>
    AddOutputFilterByType DEFLATE text/html text/plain text/xml application/xml application/xhtml+xml text/css text/javascript application/javascript application/x-javascript
</ifModule>

<IfModule mod_gzip.c>
    mod_gzip_on Yes
    mod_gzip_dechunk Yes
    mod_gzip_item_include file \.(html?|xml|txt|css|js)$
    mod_gzip_item_include handler ^cgi-script$
    mod_gzip_item_include mime ^text/.*
    mod_gzip_item_include mime ^application/x-javascript.*
    mod_gzip_item_exclude mime ^image/.*
    mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</IfModule>

<IfModule mod_expires.c>
  ExpiresActive on

# Perhaps better to whitelist expires rules? Perhaps.
  ExpiresDefault                          "access plus 1 month"

# cache.appcache needs re-requests in FF 3.6 (thx Remy ~Introducing HTML5)
  ExpiresByType text/cache-manifest       "access plus 60 seconds"

# your document html 
  ExpiresByType text/html                 "access plus 60 seconds"

# data
  ExpiresByType text/xml                  "access plus 60 seconds"
  ExpiresByType application/xml           "access plus 60 seconds"
  ExpiresByType application/json          "access plus 60 seconds"

# rss feed
  ExpiresByType application/rss+xml       "access plus 1 hour"

# favicon (cannot be renamed)
  ExpiresByType image/x-icon              "access plus 1 week" 

# media: images, video, audio
  ExpiresByType image/gif                 "access plus 1 month"
  ExpiresByType image/png                 "access plus 1 month"
  ExpiresByType image/jpg                 "access plus 1 month"
  ExpiresByType image/jpeg                "access plus 1 month"
  ExpiresByType video/ogg                 "access plus 1 month"
  ExpiresByType audio/ogg                 "access plus 1 month"
  ExpiresByType video/mp4                 "access plus 1 month"
  ExpiresByType video/webm                "access plus 1 month"

# htc files  (css3pie)
  ExpiresByType text/x-component          "access plus 1 month"

# webfonts
  ExpiresByType font/truetype             "access plus 1 month"
  ExpiresByType font/opentype             "access plus 1 month"
  ExpiresByType application/x-font-woff   "access plus 1 month"
  ExpiresByType image/svg+xml             "access plus 1 month"
  ExpiresByType application/vnd.ms-fontobject "access plus 1 month"

# css and javascript
  ExpiresByType text/css                  "access plus 2 months"
  ExpiresByType application/javascript    "access plus 2 months"
  ExpiresByType text/javascript           "access plus 2 months"

  <IfModule mod_headers.c>
    Header append Cache-Control "public"
  </IfModule>

</IfModule>

# BEGIN Cache-Control Headers
<ifModule mod_headers.c>
  <filesMatch "\.(ico|jpe?g|png|gif|swf)$">
    Header set Cache-Control "public"
  </filesMatch>
  <filesMatch "\.(css)$">
    Header set Cache-Control "public"
  </filesMatch>
  <filesMatch "\.(js)$">
    Header set Cache-Control "private"
  </filesMatch>
  <filesMatch "\.(x?html?|php)$">
    Header set Cache-Control "private, must-revalidate"
  </filesMatch>
</ifModule>
# END Cache-Control Headers 

<IfModule pagespeed_module>
    ModPagespeed on
    # using commands,filters etc
</IfModule>