publisher wrongly generating warning that there is 'nothing to publish'
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Key: MODPYTHON-180
URL: http://issues.apache.org/jira/browse/MODPYTHON-180
Project: mod_python
Issue Type: Bug
Components: publisher
Affects Versions: 3.3
Reporter: Graham Dumpleton
Publisher handler contains the code:
# we log a message if nothing was published, it helps with debugging
if (not published) and (req.bytes_sent==0) and (req.next is None):
log=int(req.get_config().get("PythonDebug", 0))
if log:
req.log_error("mod_python.publisher: nothing to publish.")
The idea is that if the publisher didn't generate any output and simply
returned None, that a warning would be generated which might be noticed by a
developer and thus be helpful to debugging problems.
Problem is that "req.bytes_sent" is only actually non zero when data is flushed
and actually written back to the client by Apache. It does not take into
consideration any buffered data.
In other words, if "req.write()" is used but second optional argument is always
being set to 0 indicating that data should not be flushed, then publisher will
wrongly say nothing actually got published.
Because the PSP classes are no longer flushing data so that output filters like
"CONTENT_LENGTH" will work, this will mean you will get this warning all the
time when using code like:
from mod_python import apache, psp
def index(req):
page = psp.PSP(req, 'echo.psp')
page.run()
Question is, is there a way to determine from Apache that there is buffered
data. We don't really want to be adding another special flag in the mod_python
request wrapper like req._content_type_set do we???
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