Class: Staticd::CacheEngine

Inherits:
Object
  • Object
show all
Defined in:
lib/staticd/cache_engine.rb

Overview

Class to manage HTTP resources caching.

Example:

cache_engine = CacheEngine.new("/tmp/cache")
unless cache.cached?("/index.html")
  cache_engine.cache("/index.html", "http://storage.tld/0000000")
end

TODO: add a purge method based on file’s atime attribute

Instance Method Summary collapse

Constructor Details

#initialize(http_root) ⇒ CacheEngine

Returns a new instance of CacheEngine.



17
18
19
20
 
# File 'lib/staticd/cache_engine.rb', line 17

def initialize(http_root)
  @http_root = http_root
  check_cache_directory
end

Instance Method Details

#cache(resource_path, resource_url) ⇒ Object 



22
23
24
25
26
27
28
29
 
# File 'lib/staticd/cache_engine.rb', line 22

def cache(resource_path, resource_url)
  open(resource_url, "rb") do |resource|
    FileUtils.mkdir_p(File.dirname(local_path(resource_path)))
    File.open(local_path(resource_path), "w+") do |file|
      resource.each { |chunk| file.write(chunk) }
    end
  end
end

#cached?(resource_path) ⇒ Boolean

Returns:

  • (Boolean) 


31
32
33
 
# File 'lib/staticd/cache_engine.rb', line 31

def cached?(resource_path)
  File.exist?(local_path(resource_path))
end