Download a file from a URL and cache it on disk

This object provides methods to download files and cache them on disk.

Usage

download_cache

A list of methods:

$get(url, type, handler) downloads a URL, caches it, and returns the file content according to the value of type (possible values: "text" means the text content; "base64" means the base64 encoded data; "raw" means the raw binary content; "auto" is the default and means the type is determined by the content type in the URL headers). Optionally a handler function can be applied to the content.
$list() gives the list of cache files.
$summary() gives a summary of existing cache files.
$remove(url, type) removes a single cache file.
$purge() deletes all cache files.