Bugs item #1711605, was opened at 2007-05-03 10:28
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Category: Extension Modules
Group: Python 2.5
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Steve Cassidy (stevecassidy)
Assigned to: Nobody/Anonymous (nobody)
Summary: CGIHttpServer leaves traces of previous requests in env
Initial Comment:
CGIHttpserver tries to reset the environment between calls to CGI scripts by
setting various variables to '' if they are not needed in the current request.
In some cases this is not the correct behaviour since the presence of a null
value can be interpreted by a CGI script as being significant.
For example, if HTTP_COOKIE has a null value then a script doing the standard
test:
if os.environ.has_key('HTTP_COOKIE'):
# get the cookie
will have trouble
The problem is that CGIHTTPserver.py resets the entries in the env array which
is then passed to os.environ.update(), this can only overwrite the env
variables, not remove them.
An alternative is to call
if os.environ.has_key(k):
del os.environ[k]
inside the loop that updates the empty keys, then these variables will not be
passed on to the CGI script.
Steve
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