On 04/07/2013 13:47, Νίκος wrote:
Στις 4/7/2013 3:07 μμ, ο/η MRAB έγραψε:
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']).


I have followed your suggestion by trying this:

try:
        host = socket.gethostbyaddr( os.environ['REMOTE_ADDR'] )[0]
except socket.gaierror:
        host = "UnResolved"

and then re-cloudlflared "superhost.gr" domain

http://superhost.gr/ gives internal server error.

Try catching OSError instead. (As I said, from Python 3.3,
socket.gaierror is a subclass of it.)

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