url: file/ftp

 
 4.2 file and ftp
 ================
 
 The ‘ftp’ and ‘file’ schemes are defined in RFC 1808.  The ‘url’ library
 treats ‘ftp:’ and ‘file:’ as synonymous.  Such URLs have the form
 
      ftp://USER:PASSWORD@HOST:PORT/FILE
      file://USER:PASSWORD@HOST:PORT/FILE
 
 If the URL specifies a local file, it is retrieved by reading the file
 contents in the usual way.  If it specifies a remote file, it is
 retrieved using either the Tramp or the Ange-FTP package.  See
 (emacs)Remote Files.
 
    When retrieving a compressed file, it is automatically uncompressed
 if it has the file suffix ‘.z’, ‘.gz’, ‘.Z’, ‘.bz2’, or ‘.xz’.  (The
 list of supported suffixes is hard-coded, and cannot be altered by
 customizing ‘jka-compr-compression-info-list’.)
 
  -- User Option: url-directory-index-file
      This option specifies the filename to look for when a ‘file’ or
      ‘ftp’ URL specifies a directory.  The default is ‘index.html’.  If
      this file exists and is readable, it is viewed.  Otherwise, Emacs
      visits the directory using Dired.