RewriteEngine On
RewriteBase /
DirectoryIndex index.html
  # If an existing asset or directory is requested go to it as it is
  RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI} -f [OR]
  RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI} -d
  RewriteRule ^ - [L]

  # If the requested resource doesn't exist, use index.html
  RewriteRule ^([0-9a-zA-Z-_/]+)$ index.html?url=$1 [L]

  RewriteRule ^tmp/script.js$ /bin/init.js$1 [L]
  RewriteRule ^tmp/help/(.*?)$ /bin/helpers/$1 [L]

  RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
  RewriteRule ^ http%{ENV:protossl}://%1%{REQUEST_URI} [L,R=301]

  # Requires mod_expires to be enabled.
  <IfModule mod_expires.c>
    # Enable expirations.
    ExpiresActive On

    # Cache all files for 2 weeks after access (A).
    ExpiresDefault A1209600
  </IfModule>

  # Rules to correctly serve gzip compressed CSS and JS files.
  # Requires both mod_rewrite and mod_headers to be enabled.
  <IfModule mod_headers.c>
    # Serve gzip compressed CSS files if they exist and the client accepts gzip.
    RewriteCond %{HTTP:Accept-encoding} gzip
    RewriteCond %{REQUEST_FILENAME}\.gz -s
    RewriteRule ^(.*)\.css $1\.css\.gz [QSA]

    # Serve gzip compressed JS files if they exist and the client accepts gzip.
    RewriteCond %{HTTP:Accept-encoding} gzip
    RewriteCond %{REQUEST_FILENAME}\.gz -s
    RewriteRule ^(.*)\.js $1\.js\.gz [QSA]

    # Serve correct content types, and prevent mod_deflate double gzip.
    RewriteRule \.css\.gz$ - [T=text/css,E=no-gzip:1]
    RewriteRule \.js\.gz$ - [T=text/javascript,E=no-gzip:1]

    <FilesMatch "(\.js\.gz|\.css\.gz)$">
      # Serve correct encoding type.
      Header set Content-Encoding gzip
      # Force proxies to cache gzipped & non-gzipped css/js files separately.
      Header append Vary Accept-Encoding
    </FilesMatch>
  </IfModule>

  <IfModule mod_expires.c>
      ExpiresActive on 

      ExpiresByType image/jpg "access plus 1 month"
      ExpiresByType image/jpeg "access plus 1 month"
      ExpiresByType image/gif "access plus 1 month"
      ExpiresByType image/png "access plus 1 month"
  </IfModule>