Class: Chuckle::Cache

Inherits:
Object
  • Object
show all
Defined in:
lib/chuckle/cache.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(client) ⇒ Cache

Returns a new instance of Cache.



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# File 'lib/chuckle/cache.rb', line 7

def initialize(client)
  @client = client

  self.hits = self.misses = 0
end

Instance Attribute Details

#hits ⇒ Object

Returns the value of attribute hits.



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# File 'lib/chuckle/cache.rb', line 5

def hits
  @hits
end

#misses ⇒ Object

Returns the value of attribute misses.



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# File 'lib/chuckle/cache.rb', line 5

def misses
  @misses
end

Instance Method Details

#body_path(request) ⇒ Object 



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# File 'lib/chuckle/cache.rb', line 51

def body_path(request)
  uri = request.uri

  # calculate body_path
  s = @client.cache_dir
  s = "#{s}/#{pathify(uri.host)}"
  s = "#{s}/#{pathify(uri.path)}"
  if uri.query
    q = "?#{uri.query}"
    s = "#{s}#{pathify(q)}"
  end
  if body = request.body
    s = "#{s},#{pathify(body)}"
  end

  # shorten long paths to md5 checksum
  if s.length > 250
    dir, base = File.dirname(s), File.basename(s)
    s = "#{dir}/#{Util.md5(base)}"
  end

  s
end

#clear(request) ⇒ Object 



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# File 'lib/chuckle/cache.rb', line 33

def clear(request)
  Util.rm_if_necessary(request.headers_path)
  Util.rm_if_necessary(request.body_path)
end

#exists?(request) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chuckle/cache.rb', line 38

def exists?(request)
  File.exists?(request.body_path)
end

#expired?(request) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chuckle/cache.rb', line 42

def expired?(request)
  return false if @client.expires_in == :never
  return false if !exists?(request)
  if File.stat(request.body_path).mtime + @client.expires_in < Time.now
    clear(request)
    true
  end
end

#get(request) ⇒ Object 



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# File 'lib/chuckle/cache.rb', line 13

def get(request)
  if !exists?(request) || expired?(request)
    self.misses += 1
    return
  end
  self.hits += 1
  Response.new(request)
end

#set(request, curl) ⇒ Object 



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# File 'lib/chuckle/cache.rb', line 22

def set(request, curl)
  # mkdirs
  FileUtils.mkdir_p([File.dirname(request.headers_path), File.dirname(request.body_path)])

  # now mv
  FileUtils.mv(curl.headers_path, request.headers_path)
  FileUtils.mv(curl.body_path, request.body_path)

  Response.new(request)
end