Improve handling of gzipped built html/web applications

If gate jobs gzip their builds before they are uploaded or if the
builds are automatically gzipped after a while on logs.o.o, the
current configuration does not try to seek out the gzipped files
with the proper mimetypes.

This commit adds missing mimetypes for common files:
- css.gz
- js.gz
- ttf.gz (fonts)

It also adds a rewrite rule that will check if there is a .gz
equivalent for the file the user is trying to seek, if there is,
it will serve it - otherwise it's business as usual.

Change-Id: I5e5d2da0ef3c385f836507e69a686821aba925a1

templates/logs-dev.vhost.erb

@@ -16,13 +16,27 @@ NameVirtualHost <%= @vhost_name %>:<%= @port %>
   # use Apache to compress the results afterwards, to save on the wire
   # it's approx 18x savings of wire traffic to compress. We need to
   # compress by content types that htmlify can produce
-  AddOutputFilterByType DEFLATE text/plain text/html
+  AddOutputFilterByType DEFLATE text/plain text/html application/x-font-ttf
 
   <FilesMatch \.html\.gz$>
     ForceType text/html
     AddDefaultCharset UTF-8
     AddEncoding x-gzip gz
   </FilesMatch>
+  <FilesMatch \.css\.gz$>
+    ForceType text/css
+    AddDefaultCharset UTF-8
+    AddEncoding x-gzip gz
+  </FilesMatch>
+  <FilesMatch \.js\.gz$>
+    ForceType text/javascript
+    AddDefaultCharset UTF-8
+    AddEncoding x-gzip gz
+  </FilesMatch>
+  <FilesMatch \.ttf\.gz$>
+    ForceType application/x-font-ttf
+    AddEncoding x-gzip gz
+  </FilesMatch>
   <Directory <%= @docroot %>>
     Options <%= @options %>
     AllowOverride None
@@ -49,6 +63,12 @@ NameVirtualHost <%= @vhost_name %>:<%= @port %>
   </Directory>
 
   RewriteEngine On
+  # If the specified file does not exist, look if there is a gzipped version
+  # If there is, serve that one instead
+  RewriteCond %{DOCUMENT_ROOT}%{REQUEST_FILENAME} !-f
+  RewriteCond %{DOCUMENT_ROOT}%{REQUEST_FILENAME}.gz -f
+  RewriteRule ^/(.*)$ %{REQUEST_URI}.gz
+
   # rewrite txt.gz & console.html[.gz] files to map to our internal htmlify
   # wsgi app
   # PT, Pass-through:  to come back around and get picked up by the