Re: I-D ACTION:draft-ietf-secsh-scp-sftp-ssh-uri-00.txt

[Roumen Petrov <openssh%roumenpetrov.info@localhost>]

 What about syntax:

secsh_URI := secsh_scheme "://" [secsh_userinfo] "@" ] host [ ":" port ] 
[; params] [abs_path]
secsh_scheme := {ssh|scp|sftp}
abs_path := "/" path_segments
path_segments := ["/"] segment [ "/" segment]
params := parameter=value [, parameter=value]

- when path_segments begin with "/" or "%2F" => path is relative to "/" 
or "My Computer(?)" :) for windows otherwise to user home directory.
- when parameter is not supported by scheme should be ignored - as 
example typecode for ssh.



Misc.:
I hope that attached shell script "ftp-url-test.sh" will help to 
understand ftp urls. Script use two programs wget and curl.
Before to run we should create directory "c:" in user home "${HOME}" and 
in root  "/" and file path.txt in them, i.e.:
-----------------------------------------------------------------------------
$ cd
$ mkdir 'c:'
$ cd 'c:'
$ pwd > path.txt
$ su -
# cd /
# mkdir 'c:'
# cd 'c:'
# pwd > path.txt
-----------------------------------------------------------------------------

output from script is similar to:
-----------------------------------------------------------------------------
=== port:=
===[ftp://test:change_it@localhost/c:/path.txt]===
wget->/home/test/c:
curl->/home/test/c:
===[ftp://test:change_it@localhost/c%3A/path.txt]===
wget->/home/test/c:
curl->/home/test/c:
===[ftp://test:change_it@localhost//c:/path.txt]===
wget->/c:
curl->/c:
===[ftp://test:change_it@localhost//c%3A/path.txt]===
wget->/c:
curl->/c:
===[ftp://test:change_it@localhost/%2Fc%3A/path.txt]===
wget->/c:
curl->/c:
=== port:=21
===[ftp://test:change_it@localhost:21/c:/path.txt]===
wget->/home/test/c:
curl->/home/test/c:
===[ftp://test:change_it@localhost:21/c%3A/path.txt]===
wget->/home/test/c:
curl->/home/test/c:
===[ftp://test:change_it@localhost:21//c:/path.txt]===
wget->/c:
curl->/c:
===[ftp://test:change_it@localhost:21//c%3A/path.txt]===
wget->/c:
curl->/c:
===[ftp://test:change_it@localhost:21/%2Fc%3A/path.txt]===
wget->/c:
curl->/c:
-----------------------------------------------------------------------------
Browsers:
- Konqueror 3.0.x ( not tested with versions > 3.1 and  < 3.0 ) always 
download "/c:/path.txt" :-(
- ftp in Opera 6.0 (not tested with versions >= 6.1 and < 6) is not 
stable (problems with userinfo and ":" in path).
- Gecko (not tested with versions < 1.0) - fine
- IE - not tested.
- Comunicator (Netcape 4.7x):
 - "ftp://user:pass@host"; list user home dir and change url to 
ftp://user@host/path_to_user_home
 - "ftp://user:pass@host/"; list root directory
, i.e. depend from implementation  :-(

Bill Sommerfeld wrote:

> > scp://hostname/c:/bin/thingy
> >
> > Isn't there current a similar problem with ftp urls?
> >
> > It would seem that in order to form the URL you would have to convert
> > path-separators into / to fit into URL syntax. I think this is what is
> > done with FTP.  
> >    
> yep, that matches my (possibly lossy) understanding of ftp as well
> (shortly after NetBSD's ftp client was extended to take url's on the
> command line, there was a followup code change to do individual
> cd's for each URL component ..)
#!/bin/sh
# Author: Roumen Petrov

WGET="wget"
WGET_OPT="--proxy=off -e verbose=off -e debug=off -e server_response=off --output-document=-"

CURL="curl"
CURL_OPT=""

DEFAULT_PORT="21"


# ===
scheme="ftp"

user="${USER}"
pass="change_it"
userinfo="${user}:${pass}"

host="localhost"

for port in '' 21; do
  echo "=== port:=${port}"

  hostport=""
  #if test -n "${port}" -a "${port}" != "${DEFAULT_PORT}"; then
  if test -n "${port}"; then
    hostport="${host}:${port}"
  else
    hostport="${host}"
  fi

  for abs_path in \
    'c:/path.txt' \
    'c%3A/path.txt' \
    '/c:/path.txt' \
    '/c%3A/path.txt' \
    '%2Fc%3A/path.txt' \
  ; do
    URL="${scheme}://${userinfo}@${hostport}/${abs_path}"

    echo "===[${URL}]==="
    printf "wget->"; ${WGET} ${WGET_OPT} "${URL}" 2>/dev/null
    printf "curl->"; ${CURL} ${CURL_OPT} "${URL}" 2>/dev/null
  done
done