Created
October 24, 2010 15:50
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add cache-busting to images within stylesheets
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require 'zlib' | |
@@cssPath = '../public/stylesheets/' #relative to where the script is running | |
@@imagePath = '../public/images/' #relative to where the script is running | |
@@styleSheets = ['myCssFile1.css', 'AntherCssFile.css'] | |
def crc(fileName) | |
fileName = @@imagePath + fileName.slice(10..-1) | |
contents = File.read(fileName) ; nil | |
Zlib.crc32(contents,0).to_s(16) | |
end | |
@@styleSheets.each do |css| | |
fileName = @@cssPath + css | |
file = File.new(fileName, 'r') | |
lines = [] | |
while line = file.gets | |
line.gsub! /\.\.\/images\/.*?\.(gif|jpg|png)(\?[a-z\d]+)?/ do |match| | |
queryIndex = match.index("?") | |
match = match.slice(0..queryIndex-1) unless queryIndex.nil? | |
match + "?" + crc(match) | |
end | |
lines << line | |
end | |
file.close | |
file = File.new(fileName, File::WRONLY|File::TRUNC) | |
lines.each {|line| file.puts line } | |
file.close | |
end |
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