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

Νίκος nikos at superhost.gr
Thu Jul 4 13:36:25 CEST 2013

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] 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"))
> You'll need to find out where that bytestring is coming from.

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?

What is now proved was at first only imagined!

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