- From: Josh Cohen <josh@netscape.com>
- Date: Tue, 6 May 1997 08:19:21 -0700 (PDT)
- To: Larry Masinter <masinter@parc.xerox.com>
- Cc: http-wg@cuckoo.hpl.hp.com
- Message-Id: <Roam.SIMC.2.0.6.862931961.21233.josh@netscape.com>
Please read the following attachment.. ----------------------------------------------------------------------------- Josh Cohen Netscape Communications Corp. Netscape Fire Department "My opinions, not Netscape's" Server Engineering josh@netscape.com http://home.netscape.com/people/josh/ -----------------------------------------------------------------------------
Greetings, I've recently been made aware of a situation with Lynx interoperating with our proxy server. The issue surrounds ftp urls and redirections. We've gone back and forth a bit, and looked at the URL spec ( rfc 1738 ), but I dont think the spec is clear in its intent, so Im asking you folks :) The simple question is this: When a proxy gets a request like: GET ftp://host/dir/filename HTTP/1.0 and the proxy determines that filename is actually a directory, ie the intent was a dir listing like: ftp://host/dir/ should a proxy send a redirect to the slash terminated URL ? ie ftp://host/dir/filename/ ( filename is a dir, remember ). Our proxy currently does this to preserve the clients' idea of the current directory.. The details. The spec says: 3.2.2. FTP url-path The url-path of a FTP URL has the following syntax: <cwd1>/<cwd2>/.../<cwdN>/<name>;type=<typecode> Where <cwd1> through <cwdN> and <name> are (possibly encoded) strings and <typecode> is one of the characters "a", "i", or "d". The part ";type=<typecode>" may be omitted. The <cwdx> and <name> parts may be empty. The whole url-path may be omitted, including the "/" delimiting it from the prefix containing user, password, host, and port. The lynx user asserts this to mean "an ftp URL may not be terminated by a slash " My take is that this is true when the URL is a 'complete' url, when name is not another cwdN, but a filename. When the url is just ftp://cwd/cwd/cwd ( no slash ) the proxy should redirect the client to: ftp://cwd/cwd/cwd/ What happens with most versions of lynx is that for a url like: ftp://host/dir/ ( lets say from an ftp directory listing ) Lynx insists upon trimming the slash. When it submits its modified URL, the proxy returns a redirect, pointing back to the slash terminated URL. the result: redirect loop. My gut tells me that the client shouldnt be altering the URL it got from the server initially ( trimming the slash ) and *definitely* shouldnt be trimming the redirect. Thoughts?
Received on Tuesday, 6 May 1997 08:34:06 UTC