[mod_python] mod_python weirdness, maybe related to importing?

Mike Looijmans mike.looijmans at asml.com
Tue Jun 10 13:23:43 EST 2003

>Ugh, yeah, it was happening in the SimpleTAL code where I didn't expect
>it to be.  It'd be nice if in debug mode mod_python would throw an
>exception or something if you tried adding headers after there had been
>a write.

You could do this at runtime without having to patch the mod_python code, in
the handler just do:

def handler(req):
    req.write = mywrite
    req.header_out = myheaderout(req)

def mywrite(self, data):
    self.headers_sent = 1

class myheaderout():
    ... # init stuff
    def __init__(self, req):
        self.req = req
        self.__get__ = req.header_out.__get__
        # etc. etc.
    def __set__(self, key, value):
        if self.req.headers_sent:
            raise EHeadersSent
        req.header_out[key] = value

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