— User Option: url-automatic-caching

Setting this variable non-nil causes documents to be cached automatically.

— User Option: url-cache-directory

This variable specifies the directory to store the cache files. It defaults to sub-directory cache of url-configuration-directory.

— User Option: url-cache-creation-function

The cache relies on a scheme for mapping URLs to files in the cache. This variable names a function which sets the type of cache to use. It takes a URL as argument and returns the absolute file name of the corresponding cache file. The two supplied possibilities are url-cache-create-filename-using-md5 and url-cache-create-filename-human-readable.

— Function: url-cache-create-filename-using-md5 url

Creates a cache file name from url using MD5 hashing. This is creates entries with very few cache collisions and is fast.

          (url-cache-create-filename-using-md5 "http://www.example.com/foo/bar")
            ⇒ "/home/fx/.url/cache/fx/http/com/example/www/b8a35774ad20db71c7c3409a5410e74f"

— Function: url-cache-create-filename-human-readable url

Creates a cache file name from url more obviously connected to url than for url-cache-create-filename-using-md5, but more likely to conflict with other files.

          (url-cache-create-filename-human-readable "http://www.example.com/foo/bar")
            ⇒ "/home/fx/.url/cache/fx/http/com/example/www/foo/bar"

— Function: url-cache-expired

This function returns non-nil if a cache entry has expired (or is absent). The arguments are a URL and optional expiration delay in seconds (default url-cache-expire-time).

— User Option: url-cache-expire-time

This variable is the default number of seconds to use for the expire-time argument of the function url-cache-expired.

— Function: url-fetch-from-cache

This function takes a URL as its argument and returns a buffer containing the data cached for that URL.