Contents

require 'uri'
require 'fileutils'
require 'tmpdir'

module Merb
  module Caching
    module Store
 
      class FileCache
            
        def initialize(name = "cache", keepalive = nil)
          @path = File.join(MERB_ROOT, name)
          @keepalive = keepalive
      
          FileUtils.mkdir_p(@path, :mode => 0700)
        end
      
        def []=(k,v)
          fn = File.join(@path, escape_filename(k.to_s) )
          encode_file(fn, v)
        end
        alias :put :[]=
        alias :write :[]=
        
        def [](k)
          fn = File.join(@path, escape_filename(k.to_s) )
          return nil unless File.exists?(fn)
          decode_file(fn)
        end
        alias :get :[]
        alias_method :read, :[]
      
        def delete(k)
          f = File.join(@path, escape_filename(k.to_s))
          File.delete(f) if File.exists?(f)
        end
        
        def gc!
          return unless @keepalive
      
          now = Time.now
          all.each do |fn|
            expire_time = File.stat(fn).atime + @keepalive 
            File.delete(fn) if now > expire_time
          end
        end

        private
      
        def decode_file(fn)
          val = nil
          File.open(fn,"rb") do |f|
            f.flock(File::LOCK_EX)
            val = Marshal.load( f.read )
            f.flock(File::LOCK_UN)
          end
          return val
        end
      
        def encode_file(fn, value)
          File.open(fn, "wb") do |f| 
            f.flock(File::LOCK_EX)
            f.chmod(0600)
            f.write(Marshal.dump(value))
            f.flock(File::LOCK_UN)
          end
        end
        
        def all
          Dir.glob( File.join(@path, '*' ) )
        end
        # need this for fat filesystems
        def escape_filename(fn)
          URI.escape(fn, /["\/:;|=,\[\]]/)
        end
      
      end
      
    end
  end
end

Version data entries

6 entries across 6 versions & 1 rubygems

Version	Path
merb-0.3.0	lib/merb/caching/store/file_cache.rb
merb-0.3.1	lib/merb/caching/store/file_cache.rb
merb-0.3.3	lib/merb/caching/store/file_cache.rb
merb-0.3.7	lib/merb/caching/store/file_cache.rb
merb-0.2.0	lib/merb/caching/store/file_cache.rb
merb-0.3.4	lib/merb/caching/store/file_cache.rb