Register some commonly used mime types (png, jpeg, pdf, zip etc.) per…

… default

actionpack/lib/action_dispatch/http/mime_types.rb

@@ -7,11 +7,23 @@
 Mime::Type.register "text/css", :css
 Mime::Type.register "text/calendar", :ics
 Mime::Type.register "text/csv", :csv
+
+Mime::Type.register "image/png", :png, [], %w(png)
+Mime::Type.register "image/jpeg", :jpeg, [], %w(jpg jpeg jpe)
+Mime::Type.register "image/gif", :gif, [], %w(gif)
+Mime::Type.register "image/bmp", :bmp, [], %w(bmp)
+Mime::Type.register "image/tiff", :tiff, [], %w(tif tiff)
+
+Mime::Type.register "video/mpeg", :mpeg, [], %w(mpg mpeg mpe)
+
 Mime::Type.register "application/xml", :xml, %w( text/xml application/x-xml )
 Mime::Type.register "application/rss+xml", :rss
 Mime::Type.register "application/atom+xml", :atom
 Mime::Type.register "application/x-yaml", :yaml, %w( text/yaml )
 
+Mime::Type.register "application/pdf", :pdf, [], %w(pdf)
+Mime::Type.register "application/zip", :zip, [], %w(zip)
+
 Mime::Type.register "multipart/form-data", :multipart_form
 Mime::Type.register "application/x-www-form-urlencoded", :url_encoded_form