Wrong check for Transfer-Encoding "chunked" in Zope while using finder (MacOS) as webdav client

[Sven Rudolph]

According to RFC2616 - Hypertext Transfer Protocol -- HTTP/1.1, Chapter 3.6 all transfer-coding values are case-insensitive, but Zope checks for "chunked" only as lower case string.

Found in (Zope-2.11.3):
zope/server/http/httprequestparser.py. line 147
zope/server/http/httptask.py, line 138
ZServer/medusa/http_server.py, line 216

Result:
Uploaded files with finder (MacOSX) as webdav client always have a length of 0 Bytes.
Finder sends the transfer-coding value as "Chunked" (with a capital C), which is allowed according to RFC2616, but falls through the checks in the listed files.

Greetings
Sven

[Colin Watson (cjwatson)]

The zope2 project on Launchpad has been archived at the request of the Zope developers (see https://answers.launchpad.net/launchpad/+question/683589 and https://answers.launchpad.net/launchpad/+question/685285). If this bug is still relevant, please refile it at https://github.com/zopefoundation/zope2.