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Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte

From Νίκος Gr33k <nikos@superhost.gr>
Newsgroups comp.lang.python
Subject Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte
Date 2013-07-05 11:49 +0300
Organization GRNET - Greek Research and Technology Network
Message-ID <kr61as$koa$1@news.grnet.gr> (permalink)
References (3 earlier) <pan.2013.07.05.00.06.41.617000@nowhere.com> <kr5qdh$t82$2@news.grnet.gr> <mailman.4281.1373010669.3114.python-list@python.org> <kr5uem$dq8$1@news.grnet.gr> <mailman.4283.1373013336.3114.python-list@python.org>

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Στις 5/7/2013 11:35 πμ, ο/η Dave Angel έγραψε:
> On 07/05/2013 04:00 AM, Νίκος Gr33k wrote:
>> Στις 5/7/2013 10:50 πμ, ο/η Dave Angel έγραψε:
>>>
>>> The line started as:
>>>
>>>  >      host = socket.gethostbyaddr( os.environ['REMOTE_ADDR'] )[0]
>>>
>>> refactor that to:
>>>         remadd = os.environ('REMOVE_ADDR')
>>>         tuple3 = socket.gethostbyaddr(remadd)
>>>         host = tuple3[0]
>>>
>>> and see which one throws the exception.  Then once you have that,
>>> examine the exact parameters that might be triggering the problem.  In
>>> particular, figure out the exact types and values for remadd and tuple3.
>>>
>>>         print(type(remadd) + " : " + repr(remadd))
>>
>> I'am not sure how iam supposed to write this: i just tried this:
>>
>>
>> try:
>>      remadd = os.environ('REMOVE_ADDR')
>>      tuple3 = socket.gethostbyaddr(remadd)
>>      host = tuple3[0]
>> except:
>>      host = type(remadd) + " : " + repr(remadd)
>>
>>
>> but iam getting an internal server error.
>>
>> I didnt print it as you said but its the same thing host var gets
>> printed later on.
>>
>> Now, why would this give an internal server error?
>>
>
> I have no idea what causes an internal server error.  It's up to you to
> get the output of the expression to some location you can examine.
> Easiest way is to run those 3 lines directly on the server, not in the
> cgi environment.
>
> But if you don't have any debugging tools, then STOP right now and build
> some.  Use logging, or redirect print, or do something that the server
> folks provide as debugging aids.  But just blindly guessing is
> ludicrous.  So also is throwing out clues by using a bare except.
>
> Assigning that string to host makes no sense at all.  And neither does
> putting it in the except clause.  You want to get that string to YOUR
> eyes, not to the server who might get an internal server error.

I don't think running it via 'cli' would help much, since its a 
cgi-script and ip addr function have no meaning calling them in plain 
our of a cgi environment but here it is:


Python 3.3.2 (default, Jun  3 2013, 16:18:05)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux
Type "help", "copyright", "credits" or "license" for more information.
 >>> import os
 >>> remadd = os.environ('REMOVE_ADDR')
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
TypeError: '_Environ' object is not callable



-- 
What is now proved was at first only imagined!

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UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος <nikos@superhost.gr> - 2013-07-04 11:37 +0300
  Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Dave Angel <davea@davea.name> - 2013-07-04 05:59 -0400
    Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος <nikos@superhost.gr> - 2013-07-04 13:03 +0300
      Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Dave Angel <davea@davea.name> - 2013-07-04 06:29 -0400
        Fwd: Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος <nikos@superhost.gr> - 2013-07-04 13:36 +0300
  Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2013-07-04 11:50 +0200
    Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος <nikos@superhost.gr> - 2013-07-04 13:38 +0300
      Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Chris Angelico <rosuav@gmail.com> - 2013-07-04 20:54 +1000
        Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος <nikos@superhost.gr> - 2013-07-04 14:29 +0300
          Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte MRAB <python@mrabarnett.plus.com> - 2013-07-04 12:52 +0100
            Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος <nikos@superhost.gr> - 2013-07-04 15:06 +0300
          Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Chris Angelico <rosuav@gmail.com> - 2013-07-04 22:37 +1000
      Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte MRAB <python@mrabarnett.plus.com> - 2013-07-04 12:06 +0100
        Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος <nikos@superhost.gr> - 2013-07-04 14:36 +0300
          Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte MRAB <python@mrabarnett.plus.com> - 2013-07-04 13:07 +0100
            Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος <nikos@superhost.gr> - 2013-07-04 15:47 +0300
              Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte MRAB <python@mrabarnett.plus.com> - 2013-07-04 14:34 +0100
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Γκρ33κ <nikos@superhost.gr> - 2013-07-04 16:38 +0300
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte MRAB <python@mrabarnett.plus.com> - 2013-07-04 16:10 +0100
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Γκρ33κ <nikos@superhost.gr> - 2013-07-04 18:56 +0300
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Wayne Werner <wayne@waynewerner.com> - 2013-07-12 06:47 -0500
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Ferrous Cranus <nikos@superhost.gr> - 2013-07-12 14:56 +0300
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Dave Angel <davea@davea.name> - 2013-07-12 11:46 -0400
            Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος <nikos@superhost.gr> - 2013-07-04 15:52 +0300
              Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte MRAB <python@mrabarnett.plus.com> - 2013-07-04 14:34 +0100
                Fwd: Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Γκρ33κ <nikos@superhost.gr> - 2013-07-04 17:48 +0300
      Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2013-07-04 15:07 +0200
        Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Γκρ33κ <nikos@superhost.gr> - 2013-07-04 16:26 +0300
      Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-07-04 16:08 -0400
        Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Ferrous Cranus <nikos@superhost.gr> - 2013-07-04 23:25 +0300
          Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Lele Gaifax <lele@metapensiero.it> - 2013-07-04 22:44 +0200
          Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Michael Torrie <torriem@gmail.com> - 2013-07-04 14:53 -0600
      Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Nobody <nobody@nowhere.com> - 2013-07-05 01:06 +0100
        Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Ferrous Cranus <nikos@superhost.gr> - 2013-07-05 09:07 +0300
          Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Lele Gaifax <lele@metapensiero.it> - 2013-07-05 08:55 +0200
            Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 10:10 +0300
        Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 09:51 +0300
          Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Lele Gaifax <lele@metapensiero.it> - 2013-07-05 09:06 +0200
            Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 10:13 +0300
              Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Dave Angel <davea@davea.name> - 2013-07-05 04:27 -0400
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 12:01 +0300
          Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Benjamin Kaplan <benjamin.kaplan@case.edu> - 2013-07-05 00:21 -0700
          Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Dave Angel <davea@davea.name> - 2013-07-05 03:50 -0400
            Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 11:00 +0300
              Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Dave Angel <davea@davea.name> - 2013-07-05 04:35 -0400
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 11:49 +0300
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Dave Angel <davea@davea.name> - 2013-07-05 05:21 -0400
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 12:25 +0300
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Lele Gaifax <lele@metapensiero.it> - 2013-07-05 12:24 +0200
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 13:28 +0300
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 13:26 +0300
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Lele Gaifax <lele@metapensiero.it> - 2013-07-05 12:36 +0200
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 13:42 +0300
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Lele Gaifax <lele@metapensiero.it> - 2013-07-05 12:59 +0200
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 14:05 +0300
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 14:16 +0300
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Lele Gaifax <lele@metapensiero.it> - 2013-07-05 13:16 +0200
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 14:27 +0300
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte feedthetroll@gmx.de - 2013-07-05 05:06 -0700
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 13:33 +0300
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte feedthetroll@gmx.de - 2013-07-05 04:56 -0700
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte feedthetroll@gmx.de - 2013-07-05 05:14 -0700
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Dave Angel <davea@davea.name> - 2013-07-05 09:05 -0400
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Lele Gaifax <lele@metapensiero.it> - 2013-07-05 16:11 +0200
                Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Νίκος Gr33k <nikos@superhost.gr> - 2013-07-05 17:27 +0300
              Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte feedthetroll@gmx.de - 2013-07-05 01:44 -0700
          Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte Lele Gaifax <lele@metapensiero.it> - 2013-07-05 12:16 +0200
  Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte roggero.n@gmail.com - 2013-09-06 16:17 -0700

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