Sinatra-DiskCache

Allows to cache heavy-load query results on the disk.

Depends on

Nope. It doesn't have any dependencies.

Install

gem install sinatra-diskcache

Usage

Oh, it's pretty easy and straightforward. Look, I'll show you.

require 'sinatra'
require 'sinatra/diskcache'

# ... something clever here ...

get '/something' do
    result = diskcache 'somefile' do |file| # this block will be invoked only in case of absence of 'somefile'
        f = File.open file, 'w'

        # heavy load here
        sleep 5

        f.write 'something to be cached'
        f.close
    end

    send_file result # or transfer it anyhow else
end

Basically, that's all. For more detailed example you can look here.

Avalilable options

diskcache_enabled

Serves for activation/deactivasion of module. Defaults to 'true'.

diskcache_logging

Activates/deactivates logging, mostly for debug. Defaults to 'true' in development environments.

diskcache_expiry_enabled

Enabled cache file expiration. Period of expiration should be set by diskcache_expiry_period (see below). Defaults to 'true'.

diskcache_expiry_period

See above. Value in seconds. Defaults to 3600 (1 hour).

diskcache_empty_cleanup

Enables empty cache file deletion. Default to 'true'.

diskcache_path

Declares the directory where cache files will be stored. Defaults to './diskcache'.

diskcache_full_paths

Enables usage of absolute paths to cached files. Full file path will be passed to processing block and returned by 'diskcache' method. In the example above both 'result' and 'file' variables will have value of '/full/path/to/cached/file'.

Defaults to 'true'.

License

Licensed under terms of MIT license.

Feel free to fork it, fix any bugs, add features and send me a pull requests. Bug reports are also welcome.