web2py doesn't start!

[Nader Emami]

I would like to use the "web2py" framework. When I tried to run "python web2py", I got the next error:

Traceback (most recent call last):
  File "web2py.py", line 27, in <module>
    gluon.widget.start(cron=True)
  File "/home/nader/web2py/gluon/widget.py", line 1054, in start
    (options, args) = console()
  File "/home/nader/web2py/gluon/widget.py", line 921, in console
    if not is_loopback_ip_address(ip[4][0])]))
  File "/home/nader/web2py/gluon/utils.py", line 306, in is_loopback_ip_address
    if ip.count('.') == 3:  # IPv4
AttributeError: 'int' object has no attribute 'count'

Would somebody help me to solve this problem?

Best regards,
 
Nader

[黄祥]

what kind of os did you use and what version of web2py did you use?

[Nader Emami]

Thank for your email. I use Linux (gentoo) with Python-2.7.3. I have got yesterday the web2py_src.zip:
(Version 2.4.6-stable+timestamp.2013.04.06.17.37.38)

Nader

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[黄祥]

i ran it on python 2.7.3 on lubuntu 12.10  and on centos 6.4 never get any problems. did you installed python from souce?

[Anthony]

Did you run "python web2py" or "python web2py.py"?

On Friday, May 3, 2013 3:30:01 AM UTC-4, Nader Emami wrote:

[Nader Emami]

I did the second one: "python web2py.py".

[Nader Emami]

I didn't install python from source, Gentoo did it.

[Anthony]

Hmm, not sure what's going on then.

[Jonathan Lundell]

On 3 May 2013, at 4:49 AM, Nader Emami <n.e...@gmail.com> wrote:
> Thank for your email. I use Linux (gentoo) with Python-2.7.3. I have got yesterday the web2py_src.zip:
> (Version 2.4.6-stable+timestamp.2013.04.06.17.37.38)

Run Python from the command line and run (and report) what you get from:

import socket
socket.getaddrinfo(socket.getfqdn(), 0)

[Massimo Di Pierro]

Can you please run a test for me?

python

>>> import socket

>>> print socket.getaddrinfo(socket.getfqdn(), 0)

what's the output?

Anyway you can run it with web2py.py --nogui

It is failing when making a guess for all your IP addresses. 

[Jonathan Lundell]

On 3 May 2013, at 7:03 AM, Anthony <abas...@gmail.com> wrote:

Hmm, not sure what's going on then.

My guess is that socket.getaddrinfo is returning an address that's in a non-IP address family. We should probably be filtering on AF_INET and AF_INET6.

[Jonathan Lundell]

On 3 May 2013, at 7:50 AM, Jonathan Lundell <jlun...@pobox.com> wrote:
> On 3 May 2013, at 7:03 AM, Anthony <abas...@gmail.com> wrote:
>> Hmm, not sure what's going on then.
>
> My guess is that socket.getaddrinfo is returning an address that's in a non-IP address family. We should probably be filtering on AF_INET and AF_INET6.

Proposed fix: pass the entire ip tuple (from getaddrinfo) to is_loopback_ip_address, and maybe (for backward compatibility in case any app is using it?) test the type of the argument. Or something.

So, change:

options.ips = list(set([
ip[4][0] for ip in socket.getaddrinfo(socket.getfqdn(), 0)

if not is_loopback_ip_address(ip[4][0])]))

to

options.ips = list(set([
addrinfo[4][0] for addrinfo in socket.getaddrinfo(socket.getfqdn(), None)
if not is_loopback_ip_address(addrinfo=addrinfo)]))
and change:

def is_loopback_ip_address(ip):
"""Determines whether the IP address appears to be a loopback address.

This assumes that the IP is valid. The IPv6 check is limited to '::1'.

"""
if not ip:
return False

if ip.count('.') == 3: # IPv4

return ip.startswith('127') or ip.startswith('::ffff:127')
return ip == '::1' # IPv6

to:

def is_loopback_ip_address(ip=None, addrinfo=None):
"""Determines whether the address appears to be an IP loopback address.

This assumes that the IP is valid. The IPv6 check is limited to '::1'.
addrinfo is a tuple from socket.getaddrinfo()

"""
if addrinfo and addrinfo[0] == socket.AF_INET or addrinfo[0] == socket.AF_INET6:
ip = addrinfo[4]
if not ip:
return False

if ip.count('.') == 3: # IPv4

return ip.startswith('127') or ip.startswith('::ffff:127')
return ip == '::1' # IPv6

[Nader Emami]

The output of "print socket.getaddrinfo(socket.getfqdn(), 0)" is:

[(10, 1, 6, '', (10, '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')), (10, 2, 17, '', (10, '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')), (10, 3, 0, '', (10, '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')), (2, 1, 6, '', ('127.0.0.1', 0)), (2, 2, 17, '', ('127.0.0.1', 0)), (2, 3, 0, '', ('127.0.0.1', 0))]

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[Jonathan Lundell]

Odd. Looks like misconfigured IPv6. Need to add a check to my patch to check for a string. 

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[黄祥]

had you already try disable the ipv6 in your network configuration?

[Nader Emami]

No! Because I don't know how I can do it.

Cheers!

[黄祥]

I think you need to edit /etc/modprobe.d/modprobe.conf and /etc/modprobe.d/aliases.conf. In the files I found out this: 

Code:

# Uncomment the network protocols you don't want loaded:  # alias net-pf-2 off            # IPv4  alias net-pf-10 off           # IPv6

after that please restart your network service and run python web2py.py again

not tested, because i'm don't have gentoo machine, hope this can help

ref:

http://forums.gentoo.org/viewtopic-t-880109-view-next.html?sid=690f3daa672e303e6c7588a3b6b1591d

[Jonathan Lundell]

On 3 May 2013, at 10:47 AM, Jonathan Lundell <jlun...@pobox.com> wrote:

Odd. Looks like misconfigured IPv6. Need to add a check to my patch to check for a string. 

Massimo, I filed Issue #1474 against this bug, and attached an untested patch.

[Nader Emami]

Thank you for your advice. I would explain what I have done to set-off the IPV6 option.

Firstly I have uncomment the statement "alias net-pf-10 off             # IPv6" in  the file "/etc/modprobe.d/aliases.conf" and then run "python web2py.py". Unfortunately without any result, I got the same error.

Then I have recompile the kernel and set-off the "IPV6" kernel.

less /usr/src/linux/.config | grep -i ipv6
# CONFIG_IPV6 is not set

Once again I tried to start "web2py.py" in recompiled kernel (without IPV6 option + alias net-pf-10 off             # IPv6et in config file). It didn't and I have gotten the same error.  I would probably say that the problem is not the "IPV6". Naturally I am not sure!

With regards,

Nader

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[Nader Emami]

[Jonathan Lundell]

On 4 May 2013, at 2:09 AM, Nader Emami <n.e...@gmail.com> wrote:

Thank you for your advice. I would explain what I have done to set-off the IPV6 option. 

Firstly I have uncomment the statement "alias net-pf-10 off             # IPv6" in  the file "/etc/modprobe.d/aliases.conf" and then run "python web2py.py". Unfortunately without any result, I got the same error.

Then I have recompile the kernel and set-off the "IPV6" kernel. 

less /usr/src/linux/.config | grep -i ipv6
# CONFIG_IPV6 is not set

Once again I tried to start "web2py.py" in recompiled kernel (without IPV6 option + alias net-pf-10 off             # IPv6et in config file). It didn't and I have gotten the same error.  I would probably say that the problem is not the "IPV6". Naturally I am not sure! 

If you can, please try the current trunk; it has a patch that should fix the problem.

[Nader Emami]

which "trunk"? I don't see any one!

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Nader

[黄祥]

please go to 

http://web2py.com/init/default/download

and then click source code in for testers coloumn