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<p class="MsoNormal">I’m having an issue where my .py authentication script
is shutting down due to an exception. I’m using a close variation
of this:</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><a href="http://tkabber.jabber.ru/files/contributions/check_mysql_python.txt">http://tkabber.jabber.ru/files/contributions/check_mysql_python.txt</a></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">The way this is written, it will abort on any exception.
Leaving ejabberd with no external authentication. This isn’t very
fault tolerant.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">In my particular case, the exception is mysql related:</p>
<p class="MsoPlainText"> File "/etc/ejabberd/JabberAuth.py", line
135, in ?</p>
<p class="MsoPlainText"> op_result = auth(ejab_request[1],
ejab_request[2], ejab_request[3])</p>
<p class="MsoPlainText"> File "/etc/ejabberd/JabberAuth.py", line
98, in auth</p>
<p class="MsoPlainText"> data=db_entry(in_user)</p>
<p class="MsoPlainText"> File "/etc/ejabberd/JabberAuth.py", line
84, in db_entry</p>
<p class="MsoPlainText"> dbcur.execute("SELECT %s,%s FROM
%s WHERE %s ='%s'"%(db_username_field,db_password_field , db_table,
db_username_field, in_user))</p>
<p class="MsoPlainText"> File
"/usr/lib64/python2.4/site-packages/MySQLdb/cursors.py", line 163, in
execute</p>
<p class="MsoPlainText"> self.errorhandler(self, exc, value)</p>
<p class="MsoPlainText"> File
"/usr/lib64/python2.4/site-packages/MySQLdb/connections.py", line 35,
in defaulterrorhandler</p>
<p class="MsoPlainText"> raise errorclass, errorvalue</p>
<p class="MsoPlainText">_mysql_exceptions.OperationalError: (2006, 'MySQL server
has gone away')</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">This particular exception isn’t anything to do with
ejabberd, obviously. It’s my problem.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I could, on certain exceptions, keep looping and waiting for
input, rather than quitting the python script.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">However----</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">If I do that, and I have to restart ejabberd for other
reasons, I get multiple JabberAuth.py instances running. I don’t
want that.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Here’s my question: How does ejabberd tell an extauth
script to quit gracefully? It seems like, at the moment, it sends “bad
input”, which causes an exception, which causes the script to quit –
This is a guess, however. How can I have my script detect the difference
between a legitimate quit request and an exception?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">The protocol listed here:</p>
<p class="MsoNormal"><a href="https://git.process-one.net/ejabberd/mainline/blobs/raw/2.1.x/doc/dev.html#htoc8">https://git.process-one.net/ejabberd/mainline/blobs/raw/2.1.x/doc/dev.html#htoc8</a></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">doesn’t seem to provide any answers. I’m
hoping someone can help me.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Thanks!</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">-Dave</p>
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