Re: Cannot connect to IMAP server in Python 3.2
Steve Howell showel...@yahoo.com wrote in news:ae774035-9db0-469d-aa2a- 02f2d25ff...@qg3g2000pbc.googlegroups.com: Once you are able to import ssl, you should be able to use IMAP4_SSL, but that still doesn't entirely explain to me why you got a timeout error with plain IMAP4 and the proper port. (I would have expected a failure, but of a different kind.) Connecting to the SSL socket requires that one initiate the TLS handshake forthwith. Establishing a connection to an I expect SSL from the get- go using a protocol that speaks I am a normal unencrypted socket but you can initiate TLS using the starttls command is not the same thing. In other words, you are violating the requirements of the protocol, and you are timing out. This is because the first protocol step in a standard connection is to wait for the plain-text greeting, where the first step in connecting to the SSL socket is to do a TLS dance, then initiate the IMAP protocol by sending the greeting. If you connect with a non-SSL initiator to an SSL endpoint, you will get a timeout. If you connect with an SSL initiator to a non-SSL endpoint, you will timeout. It is not the connection that is timing out, it is the protocol. I'd still be curious to see what happens when you try this: import socket, imaplib your_host_name = # ... socket.create_connection((your_host_name, imaplib.IMAP4_SSL_PORT)) This will, of course, work just fine. You will not see a +Hello however until you have completed the TLS negotiation. -- http://mail.python.org/mailman/listinfo/python-list
Re: Cannot connect to IMAP server in Python 3.2
On Wed, 04 Apr 2012 22:13:55 -0700, Steve Howell wrote:
On Apr 4, 9:49 pm, Steven D'Aprano steve
+comp.lang.pyt...@pearwood.info wrote:
I can connect to an IMAP server using Python 2.6:
steve@runes:~$ python2.6
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40) [GCC 4.4.5] on linux2
Type help, copyright, credits or license for more
information. import imaplib
server = imaplib.IMAP4_SSL('x')
print server
imaplib.IMAP4_SSL instance at 0xb7183c4c
But when I try with Python 3.2, it just sits there until it times out:
steve@runes:~$ python3.2
Python 3.2.2 (default, Feb 29 2012, 18:11:33) [GCC 4.4.5] on linux2
Type help, copyright, credits or license for more
information. import imaplib
server = imaplib.IMAP4('x', imaplib.IMAP4_SSL_PORT)
Traceback (most recent call last):
[...]
socket.timeout: timed out
What am I doing wrong?
Is it simply the wrong port? (IMAP4_SSL_PORT vs. IMAP4_PORT)
No, it is the correct port, 993.
How long do you wait before seeing the timeout?
Indefinitely.
Have you tried print-debugging within your local copy of imaplib.py? The
code related to making the connection just wraps
socket.create_connection:
I'm not going to start debugging the standard library until after I'm
satisfied that I'm not doing something wrong.
--
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Re: Cannot connect to IMAP server in Python 3.2
On Apr 5, 12:09 am, Steven D'Aprano steve
+comp.lang.pyt...@pearwood.info wrote:
On Wed, 04 Apr 2012 22:13:55 -0700, Steve Howell wrote:
On Apr 4, 9:49 pm, Steven D'Aprano steve
+comp.lang.pyt...@pearwood.info wrote:
I can connect to an IMAP server using Python 2.6:
steve@runes:~$ python2.6
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40) [GCC 4.4.5] on linux2
Type help, copyright, credits or license for more
information. import imaplib
server = imaplib.IMAP4_SSL('x')
print server
imaplib.IMAP4_SSL instance at 0xb7183c4c
But when I try with Python 3.2, it just sits there until it times out:
steve@runes:~$ python3.2
Python 3.2.2 (default, Feb 29 2012, 18:11:33) [GCC 4.4.5] on linux2
Type help, copyright, credits or license for more
information. import imaplib
server = imaplib.IMAP4('x', imaplib.IMAP4_SSL_PORT)
Traceback (most recent call last):
[...]
socket.timeout: timed out
What am I doing wrong?
Is it simply the wrong port? (IMAP4_SSL_PORT vs. IMAP4_PORT)
No, it is the correct port, 993.
How long do you wait before seeing the timeout?
Indefinitely.
Have you tried print-debugging within your local copy of imaplib.py? The
code related to making the connection just wraps
socket.create_connection:
I'm not going to start debugging the standard library until after I'm
satisfied that I'm not doing something wrong.
I'm not suggesting that you debug the standard library because I think
the library itself is broken. I'm suggesting that using the source
code that's freely available to you can help you have some insight on
what's going wrong.
Do you have a working theory on what you're doing wrong? You've
already ruled out the port. Why are you changing the invocation
between versions of Python?
imaplib.IMAP4_SSL('x') # 2.6
imaplib.IMAP4('x', imaplib.IMAP4_SSL_PORT) # 3.2
I'm sure the standard library works fine, and you're just doing
something silly, like mistyping the host name or forgetting to start
the server. Maybe you're running 3.2 in a slightly different OS
environment?
The ONE thing that you can find out almost immediately is what
self.host and self.post are set to when _create_socket gets called.
You could almost immediately narrow down the problem to
socket.create_connection() instead of IMAP.
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Re: Cannot connect to IMAP server in Python 3.2
On Apr 5, 12:09 am, Steven D'Aprano steve
+comp.lang.pyt...@pearwood.info wrote:
On Wed, 04 Apr 2012 22:13:55 -0700, Steve Howell wrote:
On Apr 4, 9:49 pm, Steven D'Aprano steve
+comp.lang.pyt...@pearwood.info wrote:
I can connect to an IMAP server using Python 2.6:
steve@runes:~$ python2.6
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40) [GCC 4.4.5] on linux2
Type help, copyright, credits or license for more
information. import imaplib
server = imaplib.IMAP4_SSL('x')
print server
imaplib.IMAP4_SSL instance at 0xb7183c4c
But when I try with Python 3.2, it just sits there until it times out:
steve@runes:~$ python3.2
Python 3.2.2 (default, Feb 29 2012, 18:11:33) [GCC 4.4.5] on linux2
Type help, copyright, credits or license for more
information. import imaplib
server = imaplib.IMAP4('x', imaplib.IMAP4_SSL_PORT)
Traceback (most recent call last):
[...]
socket.timeout: timed out
What am I doing wrong?
Is it simply the wrong port? (IMAP4_SSL_PORT vs. IMAP4_PORT)
No, it is the correct port, 993.
How long do you wait before seeing the timeout?
Indefinitely.
Have you tried print-debugging within your local copy of imaplib.py? The
code related to making the connection just wraps
socket.create_connection:
I'm not going to start debugging the standard library until after I'm
satisfied that I'm not doing something wrong.
--
Steven
What happens when you do this?
import imaplib, socket
socket.create_connection(('x', imaplib.IMAP4_SSL_PORT))
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Re: Cannot connect to IMAP server in Python 3.2
On Thu, 05 Apr 2012 00:21:31 -0700, Steve Howell wrote:
I'm not suggesting that you debug the standard library because I think
the library itself is broken. I'm suggesting that using the source code
that's freely available to you can help you have some insight on what's
going wrong.
Do you have a working theory on what you're doing wrong?
Actually, between you and me and the thousands of others reading this
thread, I actually do suspect it is a bug in the std library
implementation. But the suspicion is only that, and my first *assumption*
is that it is more likely I am doing something wrong. Hence my question.
You've already
ruled out the port. Why are you changing the invocation between
versions of Python?
Because imaplib.IMAP4_SSL apparently no longer exists in Python 3.
server = imaplib.IMAP4_SSL('x')
Traceback (most recent call last):
File stdin, line 1, in module
AttributeError: 'module' object has no attribute 'IMAP4_SSL'
imaplib.IMAP4_SSL('x') # 2.6
imaplib.IMAP4('x', imaplib.IMAP4_SSL_PORT) # 3.2
I'm sure the standard library works fine, and you're just doing
something silly, like mistyping the host name or forgetting to start the
server. Maybe you're running 3.2 in a slightly different OS
environment?
If you look carefully at my copy-and-pasted sessions, you will see that
both of them are on the same host, runes. While I suppose that
technically I could have two hosts both called runes, in fact I only have
one :)
And no, I have not mistyped the host name.
--
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Re: Cannot connect to IMAP server in Python 3.2
On Thu, 05 Apr 2012 12:16:09 +, Steven D'Aprano wrote:
On Thu, 05 Apr 2012 00:21:31 -0700, Steve Howell wrote:
Why are you changing the invocation between versions of Python?
Because imaplib.IMAP4_SSL apparently no longer exists in Python 3.
server = imaplib.IMAP4_SSL('x')
Traceback (most recent call last):
File stdin, line 1, in module
AttributeError: 'module' object has no attribute 'IMAP4_SSL'
Wait a minute...
IMAP4_SSL is documented as existing in Python 3. And when I run Python
3.2 on a Centos machine, instead of Debian, it includes IMAP4_SSL which
works fine.
[steve@ando ~]$ python3.2
Python 3.2.2 (default, Mar 4 2012, 10:50:33)
[GCC 4.1.2 20080704 (Red Hat 4.1.2-51)] on linux2
Type help, copyright, credits or license for more information.
py import imaplib
py server = imaplib.IMAP4_SSL('x')
py server
imaplib.IMAP4_SSL object at 0xb7b8632c
So there's something screwy going on here. Why does my Python 3.2 on
Debian not include IMAP4_SSL, but Python 2.6 does?
raises eyebrow
--
Steven
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Re: Cannot connect to IMAP server in Python 3.2
* Steven D'Aprano steve+comp.lang.pyt...@pearwood.info in comp.lang.python: IMAP4_SSL is documented as existing in Python 3. And when I run Python 3.2 on a Centos machine, instead of Debian, it includes IMAP4_SSL which works fine. So there's something screwy going on here. Why does my Python 3.2 on Debian not include IMAP4_SSL, but Python 2.6 does? Could you try import ssl on your Debian machine and see if some errors are reported? Some ssl libs used by ssl.py might not be installed. -- DW -- http://mail.python.org/mailman/listinfo/python-list
Re: Cannot connect to IMAP server in Python 3.2
On Apr 5, 5:25 am, Steven D'Aprano steve
+comp.lang.pyt...@pearwood.info wrote:
On Thu, 05 Apr 2012 12:16:09 +, Steven D'Aprano wrote:
On Thu, 05 Apr 2012 00:21:31 -0700, Steve Howell wrote:
Why are you changing the invocation between versions of Python?
Because imaplib.IMAP4_SSL apparently no longer exists in Python 3.
server = imaplib.IMAP4_SSL('x')
Traceback (most recent call last):
File stdin, line 1, in module
AttributeError: 'module' object has no attribute 'IMAP4_SSL'
Wait a minute...
IMAP4_SSL is documented as existing in Python 3. And when I run Python
3.2 on a Centos machine, instead of Debian, it includes IMAP4_SSL which
works fine.
[steve@ando ~]$ python3.2
Python 3.2.2 (default, Mar 4 2012, 10:50:33)
[GCC 4.1.2 20080704 (Red Hat 4.1.2-51)] on linux2
Type help, copyright, credits or license for more information.
py import imaplib
py server = imaplib.IMAP4_SSL('x')
py server
imaplib.IMAP4_SSL object at 0xb7b8632c
So there's something screwy going on here. Why does my Python 3.2 on
Debian not include IMAP4_SSL, but Python 2.6 does?
Looking at the source can give you some insight:
http://hg.python.org/cpython/file/3.2/Lib/imaplib.py
Look for where IMAP4_SSL is defined. On your 3.2/Debian setup, the
HAVE_SSL flag (see two lines above the class statement) is
apparently false:
1174 if HAVE_SSL:
1175
1176 class IMAP4_SSL(IMAP4):
If you look for the first mention of HAVE_SSL, it becomes apparent
that you have some issue with importing the ssl module, which
unfortunately gets buried fairly silently by imaplib:
27 try:
28 import ssl
29 HAVE_SSL = True
30 except ImportError:
31 HAVE_SSL = False
Damien, in his response, asks you to try import ssl on your Debian
machine. I think he's on the right track in identifying the problem,
based on the simple code above.
Once you are able to import ssl, you should be able to use IMAP4_SSL,
but that still doesn't entirely explain to me why you got a timeout
error with plain IMAP4 and the proper port. (I would have expected a
failure, but of a different kind.)
I'd still be curious to see what happens when you try this:
import socket, imaplib
your_host_name = # ...
socket.create_connection((your_host_name, imaplib.IMAP4_SSL_PORT))
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Cannot connect to IMAP server in Python 3.2
I can connect to an IMAP server using Python 2.6:
steve@runes:~$ python2.6
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40)
[GCC 4.4.5] on linux2
Type help, copyright, credits or license for more information.
import imaplib
server = imaplib.IMAP4_SSL('x')
print server
imaplib.IMAP4_SSL instance at 0xb7183c4c
But when I try with Python 3.2, it just sits there until it times out:
steve@runes:~$ python3.2
Python 3.2.2 (default, Feb 29 2012, 18:11:33)
[GCC 4.4.5] on linux2
Type help, copyright, credits or license for more information.
import imaplib
server = imaplib.IMAP4('x', imaplib.IMAP4_SSL_PORT)
Traceback (most recent call last):
[...]
socket.timeout: timed out
What am I doing wrong?
--
Steven
--
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Re: Cannot connect to IMAP server in Python 3.2
Steven D'Aprano wrote in news:4f7d2475$0$3$c3e8...@news.astraweb.com in
gmane.comp.python.general:
I can connect to an IMAP server using Python 2.6:
steve@runes:~$ python2.6
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40)
server = imaplib.IMAP4_SSL('x')
But when I try with Python 3.2, it just sits there until it times out:
server = imaplib.IMAP4('x', imaplib.IMAP4_SSL_PORT)
What am I doing wrong?
Not using IMAP4_SSL, above you are using IMAP4 (non SSL) but with the
SSL port.
http://docs.python.org/py3k//library/imaplib.html#imaplib.IMAP4_SSL
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Re: Cannot connect to IMAP server in Python 3.2
On Apr 4, 9:49 pm, Steven D'Aprano steve
+comp.lang.pyt...@pearwood.info wrote:
I can connect to an IMAP server using Python 2.6:
steve@runes:~$ python2.6
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40)
[GCC 4.4.5] on linux2
Type help, copyright, credits or license for more information.
import imaplib
server = imaplib.IMAP4_SSL('x')
print server
imaplib.IMAP4_SSL instance at 0xb7183c4c
But when I try with Python 3.2, it just sits there until it times out:
steve@runes:~$ python3.2
Python 3.2.2 (default, Feb 29 2012, 18:11:33)
[GCC 4.4.5] on linux2
Type help, copyright, credits or license for more information.
import imaplib
server = imaplib.IMAP4('x', imaplib.IMAP4_SSL_PORT)
Traceback (most recent call last):
[...]
socket.timeout: timed out
What am I doing wrong?
Is it simply the wrong port? (IMAP4_SSL_PORT vs. IMAP4_PORT)
How long do you wait before seeing the timeout?
Have you tried print-debugging within your local copy of imaplib.py?
The code related to making the connection just wraps
socket.create_connection:
234
235 def _create_socket(self):
236 return socket.create_connection((self.host, self.port))
237
238 def open(self, host = '', port = IMAP4_PORT):
239 Setup connection to remote server on host:port
240 (default: localhost:standard IMAP4 port).
241 This connection will be used by the routines:
242 read, readline, send, shutdown.
243
244 self.host = host
245 self.port = port
246 self.sock = self._create_socket()
247 self.file = self.sock.makefile('rb')
http://hg.python.org/cpython/file/3.2/Lib/imaplib.py
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