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fontue.ru
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##############################################################
# FONTUE - THE OPEN SOURCE WEB FONT SERVER v19042010
##############################################################
#
# Fontue is a Rack-based, open-source,
# web font server built for Kernest.com
#
# For the latest version of this code visit:
# http://github.com/garrickvanburen/fontue
#
# For more information about Rack:
# http://rack.rubyforge.org/
#
# Fontue's goals:
#
# - Keep @font-face declarations clean, readable, and cross-browswer compatible.
#
# - Serve the appropriate font format (otf/ttf, eot, svg, or woff) to browsers supporting @font-face.
#
# - Save bandwidth by effectively setting cache headers.
#
# - Save bandwidth by not sending fonts to user agents that don't
# support @font-face.
#
# - Save bandwidth by not sending fonts to requests that shouldn't
# receive the font (domain checking).
#
# - Serve fonts really fast.
#
##############################################################
#
# FONTUE ASSUMES THE FOLLOWING @font-face { src: } SYNTAX
#
# @font-face {
# ...
# src: url('http://woffly.com/font/FONT_FILENAME_WITHOUT_FORMAT'), url('http://woffly.com/font/FONT_FILENAME_WITHOUT_FORMAT#SVG_FONT_ID') format('svg');
# }
#
##############################################################
#
# TO INSTALL AND RUN FONTUE
#
# 1. Create a directory on your server for your web fonts. And update the font_server_directory variable in line 93. Default is '/fonts'.
#
# 2. Upload your web fonts into a directory to your server - say '/fonts'
# - Safari, Chrome, Firefox, and Opera like .otf & .ttf fonts
# - Mobile Safari and early versions of Chrome prefer .svg fonts
# - Later versions of Firefox also like .woff fonts
#
# 3. Upload fontue.ru to your server
# Depending on the server you're using, you may also need a config.yml file.
#
# 4. Configure your Rack-compliant web server (i.e. Thin, Ebb, Lighttpd, etc) and Run: rackup fontue.ru
# Fontue can also be easily adapted for use as an endpoint within Ruby on Rails' Metal.
#
# 5. Fontue will now be accepting requests on your server at: /font (change this in line 189)
#
##############################################################
#
# Copyright (c) 2010 Garrick Van Buren, Working Pathways, Inc.
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without
# restriction, including without limitation the rights to use,
# copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following
# conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#
##############################################################
require 'rubygems'
require 'rack'
require 'time'
require "digest/sha1"
fontue = proc do |env|
# THE ABSOLUTE PATH TO WHERE THE FONTS LIVE
font_server_directory = '/fonts'
# DON'T SERVE FONTS TO REQUESTS WITHOUT A REFERER OR USER AGENT
return [417, {"Content-Type" => "text/html"}, ["Expectation Failed"]] unless (env['HTTP_REFERER'] && env['HTTP_USER_AGENT'])
#
# IF YOU'RE DOING BLANKET DOMAIN CHECKING,
# ENTER A REGEX OF THE AUTHORIZED DOMAINS
# AND UNCOMMENT THE NEXT 2 LINES
#
# authorized_domains = /...AUTHORIZED_DOMAIN.../
# return [417, {"Content-Type" => "text/html"}, ["Expectation Failed"]] unless env['HTTP_REFERER'].match(authorized_domains)
#
# DON'T SERVE FONTS TO UNSUPPORTED BROWSERS
supported_browsers = /Chrome\/[3-9]|Firefox\/[3-9].[4-9]|\sMSIE\s[4-9]|Konqueror\/[4-9].[3-9]|Midori|Minefield|Shiretoko|IceCat|Opera\/9.|\sAppleWebKit/
return [417, {"Content-Type" => "text/html"}, ["Expectation Failed Bad Agent"]] unless env['HTTP_USER_AGENT'].match(supported_browsers)
slug = env["PATH_INFO"].split('/')[1]
return [400, {"Content-Type" => "text/html"}, ["Bad Request"]] unless slug
# GET THE FONT SLUG FROM THE REQUEST
# FONTUE ASSUMES THE FOLLOWING @font-face { src: } SYNTAX
#
# @font-face {
# ...
# src: url('http://woffly.com/font/FONT_FILENAME_WITHOUT_FORMAT'), url('http://woffly.com/font/FONT_FILENAME_WITHOUT_FORMAT#SVG_FONT_ID') format('svg');
# }
#
# THIS FUNNY SPLIT IS FOR INTERNET EXPLORER - IT DOESN'T STOP READING AT THE COMMA
# TO DO: FIGURE OUT WHY SOME RACK SERVERS PREFER THE REGEX AND WHY OTHERS PREFER THE STRING
#slug = slug.split(/\'\),\surl\(\'/)[0]
slug = slug.split("'),%20url('")[0]
# GRAB THE BROWSER APPROPRIATE FORMAT
woff_browsers = /Firefox\/3.[6-9]|Konqueror\/[4-9].[5-9]/
eot_browsers = /\sMSIE\s/
svg_browsers = /\s\(iP|Chrome\/3|Presto\/(\d+.)*\d+$/
format = if env['HTTP_USER_AGENT'].match(svg_browsers)
"svg"
elsif env['HTTP_USER_AGENT'].match(eot_browsers)
"eot"
elsif env['HTTP_USER_AGENT'].match(woff_browsers)
"woff"
else
File.exists?(font_server_directory + "/" + slug + ".otf") ? "otf" : "ttf"
end
# DOES THE BROWSER ACCEPT GZIPPING? DON'T SEND GZIPPED WOFFS OR SVGS, IT DOESN'T HELP AND IT ANNOYS BOTH FIREFOX & MOBILE SAFARI
accepts_gzip = (env['HTTP_ACCEPT_ENCODING'] && env['HTTP_ACCEPT_ENCODING'].match(/gzip/) && !format.match(/woff|svg/) ) ? ".jgz" : ""
# BUILD THE PATH TO THE FONT
font_url = "/" + slug + "." + format + accepts_gzip
# RESET THE ENV PATHS TO THE FULL PATH TO THE FONT
env["PATH_INFO"] = font_url
env["REQUEST_URI"] = font_url
# GRAB THE FONT OUT OF THE FONT SERVER DIRECTORY
file_server = Rack::File.new(font_server_directory)
status, headers, body = file_server.call(env)
# SET THE ETAG
etag = Digest::SHA1.hexdigest("#{headers['Last-Modified']}#{headers['Content-Length']}")
# CHECK IF THE FONT NEEDS TO BE SENT. IF SO - SEND IT & CACHE IT ON THE CLIENT FOR 1 YEAR.
if (etag == env['HTTP_IF_NONE_MATCH'] || headers['Last-Modified'] == env['HTTP_IF_MODIFIED_SINCE'])
status = 304
headers.delete('Content-Type')
headers.delete('Content-Length')
body = []
else
content_type = if format.match('svg')
"image/svg+xml"
else
"applications/octet-stream "
end
one_year_of_seconds = (60 * 60 * 24 * 365)
headers['Content-Type'] = content_type
headers['Content-Encoding'] = "gzip" unless accepts_gzip.empty?
headers['Content-Disposition'] = "inline,filename='" + slug + "." + format + accepts_gzip +"'"
headers['Cache-Control'] = "max-age=" + one_year_of_seconds.to_s + ",public"
headers['Access-Control-Allow-Origin'] = "*"
headers['Expires'] = (Time.new + one_year_of_seconds).rfc822
headers['ETag'] = etag
end
[status, headers, body]
end
map '/font' do
run fontue
end