[mod_python] SSL Socket Problem

Huzaifa Tapal huzaifa at hostway.com
Wed Apr 27 15:43:43 EDT 2005

Also, addiitional information from my research.  Here is the where the 
error is generated:

    def connect(self):
        "Connect to a host on a given (SSL) port."

        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.connect((self.host, self.port))
        ssl = socket.ssl(sock, self.key_file, self.cert_file)
        self.sock = FakeSocket(sock, ssl)

based on the error and tcpdump, the socket is created fine, the 
connection is using the socket is made fine, the error occurs on calling 
ssl() method of the socket class.

    def ssl(sock, keyfile=None, certfile=None):
        if hasattr(sock, "_sock"):
            sock = sock._sock
        return _realssl(sock, keyfile, certfile)

above is what the ssl method on the modular level looks like.  The funny 
part is that the _sock attribute on the sock object has to be _sock.sock 
in order for connect() to work.  And we know that works since I see 
tcpdump connections being made without a problem.  Whats wierd is that 
when the sock object is passed to the ssl() method, that is when it 
somehow gets corrupted and the _sock attribute turns from _sock.sock 
type to _sockobject() type.


Huzaifa Tapal wrote:

> Hello Dan,
> I have been doing some research and we checked tcpdump and netstats 
> while the error is happening and there are no socket connections 
> open.  Is there a thread safety issue in httplib and socket?  What 
> concerns me is that the ssl() method in socket.py is at the global 
> level meaning that the somehow the sockets are being changed by 
> multiple threads.
> hozi
> Dan Nelson wrote:
>> If it's working for a while and then you get an error, perhaps it has 
>> something to do with apache reaching some limit, queueing/caching, 
>> too many threads, too many sockets...  That might be a place to start 
>> looking.
>> Dan
>> ----- Original Message ----- From: "Huzaifa Tapal" <huzaifa at hostway.com>
>> To: <mod_python at modpython.org>
>> Sent: Thursday, 21 April, 2005 2:56 AM
>> Subject: [mod_python] SSL Socket Problem
>>> Hello All,
>>> I am having a problem with making SSL socket connections in my 
>>> mod_python application running with python 2.3.5.  The error I keep 
>>> getting back is "TypeError: ssl() argument 1 must be _socket.socket, 
>>> not _socketobject". What is odd is that if I restart the apache2 web 
>>> server, the error goes away and all the calls return back with a 
>>> message.  However, after about 20 or so minutes we start getting 
>>> this error almost instantaneously without any kind of message going 
>>> out at all.
>>> Here is the full traceback:
>>>         con.endheaders()
>>>        File "/usr/lib/python2.3/httplib.py", line 715, in endheaders
>>>         self._send_output()
>>>        File "/usr/lib/python2.3/httplib.py", line 600, in _send_output
>>>         self.send(msg)
>>>        File "/usr/lib/python2.3/httplib.py", line 567, in send
>>>         self.connect()
>>>        File "/usr/lib/python2.3/httplib.py", line 988, in connect
>>>         ssl = socket.ssl(sock, self.key_file, self.cert_file)
>>>        File "/usr/lib/python2.3/socket.py", line 73, in ssl
>>>         return _realssl(sock, keyfile, certfile)
>>>     TypeError: ssl() argument 1 must be _socket.socket, not 
>>> _socketobject
>>> I have the same application running on another machine with python 
>>> 2.3.4 and I can't replicate it in there.  Do you guys know of any 
>>> known issues with sockets and ssl with python 2.3.5?
>>> Any help would be appreciated.
>>> Hozi
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