From: kai.grossjohann@gmx.net (Kai Großjohann)
Subject: URL filename syntax?
Date: Mon, 14 Apr 2003 13:51:04 +0200 [thread overview]
Message-ID: <841y051emv.fsf@lucy.is.informatik.uni-duisburg.de> (raw)
Is it desirable to use URL-like syntax for remote files?
Currently, Tramp uses this format:
/method:user@host:localname
My idea is to use
/method://user@host/localname
where the initial slash is optional. The initial slash is needed to
provide the old magic slash behavior.
There are some issues with this:
* The URL syntax should be as close to the standard as possible. But
the ftp URL RFC states that an ftp URL looks like this:
ftp://user@host/component1/component2/.../componentN
where each component can be a string or empty. The semantics are
that the user agend does "CWD component1" followed by "CWD
component2" and so on.
This means that ftp://user@host/etc/motd refers to the file
~user/etc/motd on the remote host, as do ftp://user@host//etc/motd
and ftp://user@host/a/b/c//etc/motd. In order to reference
/etc/motd on the remote host, one has to use
ftp://user@host/%2Fetc/motd.
I think we can't require our users to type %2F in such cases, and
therefore I propose to change the ftp URL syntax to interpret
ftp://user@host//foo as the file /foo on the remote host. (And
ftp://user@host/foo refers to ~user/foo.)
* Tramp allows to omit the method. How do I do that with URLs?
* Tramp also supports multi-hop connections, with a syntax like
/multi:hop1:hop2:...:hopN:localname
where hopI looks like hop-method:user@host. So, for example,
/multi:telnet:kai@marvin:su:root@localhost:/etc/passwd
means to use telnet to log in as user kai on marvin, then use
/bin/su there to become root, then access the file /etc/passwd.
In the rare case where one would like to access a file/directory
whose name contains a colon, one can add slashes. So to access the
file "foo:bar" in root's homedir, one could use
/multi:telnet:kai@marvin:su:root@localhost:~/foo:bar
which is unambiguous.
Clearly, multi://telnet:kai@marvin/su:root@localhost/foo:bar will
not work so well... Hm. But I could support ~, too, so this would
become multi://telnet:kai@marvin/su:root@localhost/~/foo:bar which
is unambiguous.
--
file-error; Data: (Opening input file no such file or directory ~/.signature)
next reply other threads:[~2003-04-14 11:51 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-14 11:51 Kai Großjohann [this message]
2003-04-14 15:05 ` URL filename syntax? Kim F. Storm
2003-04-14 14:29 ` Stefan Monnier
2003-04-14 19:50 ` Oliver Scholz
2003-04-15 16:26 ` Ehud Karni
2003-04-15 19:19 ` Kai Großjohann
2003-04-15 21:20 ` Ehud Karni
2003-04-17 14:55 ` Kai Großjohann
2003-04-18 2:51 ` Stephen J. Turnbull
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