Downloadangebot von der HD

[Frank Schönmann]

hi!

wenn du nen anonymus login oder nen komplett offenen server
hast, ja, dann öffnet der browser das ganz normal, wenn du
beutzer und passwort vergeben hast, mußt du vor den link die
parametet benutzername@passwort: einfügen
Muß man nicht unbedingt, der Browser würde auch nachfragen (wenn
er FTP-Anmeldung beherrscht), oder er kann mit diesem URL-Schema
garnichts anfangen (weil das nirgendwo Standard ist) [...]

=== cut ===
3.1. Common Internet Scheme Syntax

While the syntax for the rest of the URL may vary depending on the
   particular scheme selected, URL schemes that involve the direct use
   of an IP-based protocol to a specified host on the Internet use a
   common syntax for the scheme-specific data:

//<user>:<password>@<host>:<port>/<url-path>

Some or all of the parts "<user>:<password>@", ":<password>",
   ":<port>", and "/<url-path>" may be excluded.  The scheme specific
   data start with a double slash "//" to indicate that it complies with
   the common Internet scheme syntax. The different components obey the
   following rules:

user
        An optional user name. Some schemes (e.g., ftp) allow the
        specification of a user name.

password
        An optional password. If present, it follows the user
        name separated from it by a colon.

The user name (and password), if present, are followed by a
   commercial at-sign "@". Within the user and password field, any ":",
   "@", or "/" must be encoded.

Note that an empty user name or password is different than no user
   name or password; there is no way to specify a password without
   specifying a user name. E.g., URL:ftp://@host.com/ has an empty
   user name and no password, URL:ftp://host.com/ has no user name,
   while URL:ftp://foo:@host.com/ has a user name of "foo" and an
   empty password.

[...]

3.2.1. FTP Name and Password

A user name and password may be supplied; they are used in the ftp
   "USER" and "PASS" commands after first making the connection to the
   FTP server.  If no user name or password is supplied and one is
   requested by the FTP server, the conventions for "anonymous" FTP are
   to be used, as follows:

The user name "anonymous" is supplied.

The password is supplied as the Internet e-mail address
        of the end user accessing the resource.

If the URL supplies a user name but no password, and the remote
   server requests a password, the program interpreting the FTP URL
   should request one from the user.
=== cut ===
Quelle: http://www.faqs.org/rfcs/rfc1738.html

bye, Frank!