[Zope] WebDAV locking problem, some more enlightment

Mon, 26 Nov 2001 08:42:41 -0500

Joachim,

Microsoft meanwhile confirmed the read-only "problem" with .html. In thei=
r
opinion it is not really a problem (but they don't call it a feature):

<quote>
I called the HTML file now in Internet Explorer 6.0 and clicked onto the
Hyperlink named "testing". The Microsoft Word Application started afterwa=
rds
and asked me also for username and password. The document downloaded then
and was shown correctly. The only difference to the test before is, that
Word says the document is read-only! This is correct, too! The reason for=
 it
is, that a web download occurred and the file is not directly located ont=
o
the web server but it's in the local Internet Explorer cache and read-onl=
y!
</quote>

Andreas

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----- Original Message -----
From: "Joachim Schmitz" <js@aixtraware.de>
To: "zope-list" <zope@zope.org>
Sent: Saturday, November 17, 2001 15:59
Subject: [Zope] WebDAV locking problem, some more enlightment

Hi,

I installed the mod_dav in my local apache, to try if it shows the same
symtoms, and found some interesting things.

1. Word opens documents not writeprotected on the apache DAV-store, even =
if
they are not writable !!!

2. By accident I had the executable flag set on a htm-file, this file is
opened writeprotected !!!
This is reproduceble, if you unset the x-flag it is opened in readwrite
mode.

I took a log of both situations:

the only difference I could find was in the response to the

GET /dav/testdocweb.htm HTTP/1.1
Accept-Language: de, en-us;q=3D0.2
If-None-Match: "1cb27-8ce-3bf6bf01"
Translate: f
User-Agent: Microsoft Data Access Internet Publishing Provider DAV
Host: 10.2.1.1
Connection: Keep-Alive

wich in the readwrite case is:

HTTP/1.1 200 OK
Date: Sat, 17 Nov 2001 19:50:19 GMT
Server: Apache/1.3.19 (Unix)  (SuSE/Linux) mod_python/2.7.2 Python/2.0
DAV/1.0.2
Last-Modified: Sat, 17 Nov 2001 19:50:08 GMT
ETag: "1cb25-8fb-3bf6bf70"
Accept-Ranges: bytes
Content-Length: 2299
Keep-Alive: timeout=3D15, max=3D99
Connection: Keep-Alive
Content-Type: text/html

<html xmlns:o=3D"urn:schemas-microsoft-com:office:office"
.... rest of document

and in the writeprotected case

HTTP/1.1 200 OK
Date: Sat, 17 Nov 2001 19:28:14 GMT
Server: Apache/1.3.19 (Unix)  (SuSE/Linux) mod_python/2.7.2 Python/2.0
DAV/1.0.2
Keep-Alive: timeout=3D15, max=3D99
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: text/html

8fb
<html xmlns:o=3D"urn:schemas-microsoft-com:office:office"
.... rest of document.

in this case the document is fetched a second time, after unlocking.

which is also the case, when fetching a htm-file from Zope-Dav storage

here is the get for a doc-file:

GET /test/testdoc11111111.doc HTTP/1.1
Accept-Language: de, en-us;q=3D0.2
If-None-Match: ts06033018.5
Translate: f
User-Agent: Microsoft Data Access Internet Publishing Provider DAV
Host: a.b.de:9800
Connection: Keep-Alive
Authorization: Basic xxxxxxxx=3D

and here the response:

HTTP/1.1 200 OK
Server: Zope/(Zope 2.4.3 (binary release, python 2.1, linux2-x86), python
2.1.0, linux2) ZServer/1.1b$
Date: Sat, 17 Nov 2001 21:38:41 GMT
Accept-Ranges: bytes
Content-Type: application/msword
Content-Length: 19456
Last-Modified: Sat, 17 Nov 2001 21:36:58 GMT

it follows the binary doc-file

here is the get for an htm-file:

GET /test/testweb1.htm HTTP/1.1
Accept-Language: de, en-us;q=3D0.2
Translate: f
User-Agent: Microsoft Data Access Internet Publishing Provider DAV
Host: a.b.de:9800
Connection: Keep-Alive
Authorization: Basic xxxxxxxxxx=3D

and the response:

HTTP/1.1 200 OK
Server: Zope/(Zope 2.4.3 (binary release, python 2.1, linux2-x86), python
2.1.0, linux2) ZServer/1.1b$
Date: Sat, 17 Nov 2001 21:38:12 GMT
Content-Type: text/html
Content-Length: 2703

The only thing which is not there in the writeprotected cases in the
response is
the "ETag:" and the "Accept-Ranges: bytes", perhaps that tells something =
to
the wizards of the HTTP-protocol ;-)

Mit freundlichen Gr=FC=DFen

Joachim Schmitz

AixtraWare, Ing. B=FCro f=FCr Internetanwendungen
H=FCsgenstr. 33a, D-52457 Aldenhoven
Telefon: +49-2464-8851, FAX: +49-2464-905163

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