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

Date 2013-07-04 13:07 +0100
From MRAB <python@mrabarnett.plus.com>
Subject Re: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0: invalid start byte
References <kr3c7k$tjs$2@news.grnet.gr> <n3tfaa-eqh.ln1@satorlaser.homedns.org> <kr3jai$jn0$4@news.grnet.gr> <mailman.4219.1372935984.3114.python-list@python.org> <kr3mnq$jn0$6@news.grnet.gr>
Newsgroups comp.lang.python
Message-ID <mailman.4222.1372939645.3114.python-list@python.org> (permalink)

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On 04/07/2013 12:36, Νίκος wrote:
> Στις 4/7/2013 2:06 μμ, ο/η MRAB έγραψε:
>> On 04/07/2013 11:38, Νίκος wrote:
>>> Στις 4/7/2013 12:50 μμ, ο/η Ulrich Eckhardt έγραψε:
>>>> Am 04.07.2013 10:37, schrieb Νίκος:
>>>>> I just started to have this error without changing nothing
>>>>
>>>> Well, undo the nothing that you didn't change. ;)
>>>>
>>>>> UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 0:
>>>>> invalid start byte
>>>>> [Thu Jul 04 11:35:14 2013] [error] [client 108.162.229.97] Premature
>>>>> end
>>>>> of script headers: metrites.py
>>>>>
>>>>> Why cant it decode the starting byte? what starting byte is that?
>>>>
>>>> It's the 0xb6 but it's expecting the starting byte of a UTF-8 sequence.
>>>> Please do some research on UTF-8, that should clear it up. You could
>>>> also search for common causes of that error.
>>>
>>> So you are also suggesting that what gesthostbyaddr() returns is not
>>> utf-8 encoded too?
>>>
>>> What character is 0xb6 anyways?
>>>
>> Well, it's from a bytestring, so you'll have to specify what encoding
>> you're using! (It clearly isn't UTF-8.)
>>
>> If it's ISO-8859-7 (what you've previously referred to as "greek-iso"),
>> then:
>>
>>  >>> import unicodedata
>>  >>> unicodedata.name(b"\xb6".decode("ISO-8859-7"))
>> 'GREEK CAPITAL LETTER ALPHA WITH TONOS'
>>
>> You'll need to find out where that bytestring is coming from.
>
> Right.
> But nowhere in my script(metrites.py) i use an 'Ά' so i really have no
> clue where this is coming from.
>
> And you are right if it was a byte came from an utf-8 encoding scheme
> then it would be automatically decoded.
>
> The only thing i can say for use is that this problem a[[ear only when i
> cloudflare my domain "superhost.gr"
>
> If i un-cloudlflare it it cease to display errors.
>
> Can you tell me hpw to write the following properly:
>
> host = socket.gethostbyaddr( os.environ['REMOTE_ADDR'] )[0] or 'UnResolved'
>
> so even if the function fails "unresolved" to be returned back?
> Somehow i need to capture the error.
>
> Or it dosnt have to do it the or operand will be returned?
>
If gethostbyaddr fails, it raises socket.gaierror, (which, from Python
3.3 onwards, is a subclass of OSError), so try catching that, setting
'host' to 'UnResolved' if it's raised.

Also, try printing out ascii(os.environ['REMOTE_ADDR']).

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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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