- From: Adam Freeman <afreeman@lightsurf.com>
- Date: Tue, 30 Oct 2001 14:04:49 -0800
- To: "Eric Sedlar" <eric.sedlar@oracle.com>, "WebDAV" <w3c-dist-auth@w3.org>
BIND does not behave like a softlink. BIND binds all properties from the linked resource to the original and vice versa. I just went to explorer, created a shortcut to a file. The created date on the shortcut is different than on the original. My point is there should be some properties that can be different on the softlink than on the original and I do not think BIND provides for that. Redirect references suck because the server has to issue a 302 and the client has to make another roundtrip. This could be a problem especially for low network latency and bandwidth situations. I think there was some other kind of reference that would do the trick (indirect reference or something like that) but as far as getting this implemented within RFC 2518??? The link property that is part of RFC 2518 should do what I'm talking about. The only question is which properties are malleable between the softlink and the original. @m -----Original Message----- From: w3c-dist-auth-request@w3.org [mailto:w3c-dist-auth-request@w3.org]On Behalf Of Eric Sedlar Sent: Tuesday, October 30, 2001 1:16 PM To: WebDAV Subject: RE: GETSRC & MULTIPUT I'm not sure you really addressed the requirements that Jim has: * atomic read/write of contents & properties * getting the source file for generated content vs. getting the generated output The notion of symbolic links potentially has the problem where GET doesn't return the same stuff as PUT stored, but typically (on a filesystem), you can use read() to get the contents you just did a write() on, even if the pathname is a symbolic link. I guess I don't see symbolic links (or BINDings in the WebDAV parlance) as relevant to this discussion. -----Original Message----- From: Adam Freeman [mailto:afreeman@lightsurf.com] Sent: Tuesday, October 30, 2001 1:03 PM To: Eric Sedlar; WebDAV Subject: RE: GETSRC & MULTIPUT Hello, 1) new methods (GETSRC, READ, WRITE) should be avoided if possible. There are plenty of methods in webdav already. 2) webdav turns a website into a file system. What does webdav seem to be missing? A good clean concept of a soft link. 3) what webdav needs is something analogous to a soft link in a file system. The soft link resource can have a different set of properties than the original resource. 4) if you start from the file system concept, then you think about how webdav should make this look transparent to the client (just like a soft link in the file system would look but it might have a different set of properties on it than another soft link or the original file) 5) Using webdav currently, I could mimic this by using PUT on a .url file (that links to the original source) and then using PROPPATCH on that .url file. PROPFIND then returns a different set of properties for that .url file than the original resource but GET returns the original source bits. This works with mod_dav.so. @m -----Original Message----- From: w3c-dist-auth-request@w3.org [mailto:w3c-dist-auth-request@w3.org]On Behalf Of Eric Sedlar Sent: Tuesday, October 30, 2001 12:19 PM To: WebDAV Subject: RE: GETSRC & MULTIPUT The fundamental question that must be addressed is whether or not the source resource and the output resource are the same. To me, the question boils down to wanting to have symmetry in my methods. If I call PROPPATCH, I can then use PROPFIND to see the properties I just wrote. We need the same thing for PUT. If I call PUT on a URL, I want a method that gets me back the stuff I just PUT at that URL. Even if I have a script that handles multiple resources, such as a program called "foo.pl", that can handle /cgi-bin/foo.pl AND /cgi-bin/foo.pl/werf the argument doesn't really apply, since generally /cgi-bin/foo.pl/werf will not respond to PUT or PROPPATCH. It's not really a WebDAV resource. Here's what WebDAV really needs: * a method called READ and a method called WRITE * The WRITE method can be used to write the dead properties and contents of a resource in a single atomic transaction. * The READ method can be used to read the dead properties and contents of the resource EXACTLY as stored by the most recent PROPPATCH/PUT/ACL/WRITE method stored them This would address both of the needs that Jim cites. We could also be extra clever and perhaps add another header called Property-Length that specifies the byte length of the property data within the message body, so that we don't have to use multipart/mime encoding for the contents (which can be computationally expensive). --Eric
Received on Tuesday, 30 October 2001 17:04:52 UTC