+ (** cp frontend *)
+val cp: string -> string -> unit
+ (** wget frontend, if output is given it is the destination file, otherwise
+ standard wget rules are used. Additionally this function support also the
+ "file://" scheme for file system addressing *)
+val wget: ?output: string -> string -> unit
+ (** gzip frontend, if keep = true original file will be kept *)
+val gzip: ?keep: bool -> string -> unit
+ (** gunzip frontend, if keep = true original file will be kept *)
+val gunzip: ?keep: bool -> string -> unit
+ (** tempfile frontend, return the name of created file. A special purpose
+ suffix is used (actually "_http_getter" *)
+val tempfile: unit -> string
+ (** mkdir frontend, if parents = true also parent directories will be created.
+ If the given directory already exists doesn't act *)
+val mkdir: ?parents: bool -> string -> unit
+
+ (** pretty printer for Unix.process_status values *)
+val string_of_proc_status : Unix.process_status -> string
+
+ (** raw HTTP downloader, return Some the contents of downloaded resource or
+ None if an error occured while downloading. This function support also
+ "file://" scheme for filesystem resources *)
+val http_get: string -> string option
+