(wget) URL Format

 
 URL Format
 ==========
 
    "URL" is an acronym for Uniform Resource Locator.  A uniform
 resource locator is a compact string representation for a resource
 available via the Internet.  Wget recognizes the URL syntax as per
 RFC1738.  This is the most widely used form (square brackets denote
 optional parts):
 
      http://host[:port]/directory/file
      ftp://host[:port]/directory/file
 
    You can also encode your username and password within a URL:
 
      ftp://user:password@host/path
      http://user:password@host/path
 
    Either USER or PASSWORD, or both, may be left out.  If you leave out
 either the HTTP username or password, no authentication will be sent.
 If you leave out the FTP username, `anonymous' will be used.  If you
 leave out the FTP password, your email address will be supplied as a
 default password.(1)
 
    *Important Note*: if you specify a password-containing URL on the
 command line, the username and password will be plainly visible to all
 users on the system, by way of `ps'.  On multi-user systems, this is a
 big security risk.  To work around it, use `wget -i -' and feed the
 URLs to Wget's standard input, each on a separate line, terminated by
 `C-d'.
 
    You can encode unsafe characters in a URL as `%xy', `xy' being the
 hexadecimal representation of the character's ASCII value.  Some common
 unsafe characters include `%' (quoted as `%25'), `:' (quoted as `%3A'),
 and `@' (quoted as `%40').  Refer to RFC1738 for a comprehensive list
 of unsafe characters.
 
    Wget also supports the `type' feature for FTP URLs.  By default, FTP
 documents are retrieved in the binary mode (type `i'), which means that
 they are downloaded unchanged.  Another useful mode is the `a'
 ("ASCII") mode, which converts the line delimiters between the
 different operating systems, and is thus useful for text files.  Here
 is an example:
 
      ftp://host/directory/file;type=a
 
    Two alternative variants of URL specification are also supported,
 because of historical (hysterical?) reasons and their widespreaded use.
 
    FTP-only syntax (supported by `NcFTP'):
      host:/dir/file
 
    HTTP-only syntax (introduced by `Netscape'):
      host[:port]/dir/file
 
    These two alternative forms are deprecated, and may cease being
 supported in the future.
 
    If you do not understand the difference between these notations, or
 do not know which one to use, just use the plain ordinary format you use
 with your favorite browser, like `Lynx' or `Netscape'.
 
    ---------- Footnotes ----------
 
    (1) If you have a `.netrc' file in your home directory, password
 will also be searched for there.
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