ZServer contains a thread synchronization bug exposed when the HTTP streaming protocol (i.e. RESPONSE.write) is used. For large responses, the reponse is written to a temporary file and the distribution thread receives "file_part_producer" requests. Writing to the tempfile uses "seek => write" in the request thread; reading the tempfile uses "seek => read" in the distribution thread. The threads are not synchronized. This may result in loss of response data: broken or buggy images/files. The following patch removes the use of a tempfile. This, of cause, is only a crude workaround. Dieter ******************************************************************* --- ZServer/:HTTPResponse.py Mon Jan 24 20:17:53 2000 +++ ZServer/HTTPResponse.py Thu Jun 8 09:01:31 2000 @@ -239,7 +239,9 @@ try: if type(l) is type(''): l=string.atoi(l) if l > 128000: - self._tempfile=tempfile.TemporaryFile() + # don't! exposes a thread synchronization problem + # self._tempfile=tempfile.TemporaryFile() + pass except: pass stdout.write(str(self))