On 30 Apr 2009, at 21:06, Martin v. Löwis wrote:
How do get a printable unicode version of these path strings if
they
contain none unicode data?
Define "printable". One way would be to use a regular expression,
replacing all codes in a certain range with a question mark.
What I mean by printable is that the string must be valid unicode
that I can print to a UTF-8 console or place as text in a UTF-8
web page.
I think your PEP gives me a string that will not encode to
valid UTF-8 that the outside of python world likes. Did I get this
point wrong?
You are right. However, if your *only* requirement is that it should
be printable, then this is fairly underspecified. One way to get
a printable string would be this function
def printable_string(unprintable):
return ""
Ha ha! Indeed this works, but I would have to try to turn enough of the
string into a reasonable hint at the name of the file so the user can
some chance of know what is being reported.
This will always return a printable version of the input string...
In our application we are running fedora with the assumption that the
filenames are UTF-8. When Windows systems FTP files to our system
the files are in CP-1251(?) and not valid UTF-8.
That would be a bug in your FTP server, no? If you want all file names
to be UTF-8, then your FTP server should arrange for that.
Not a bug its the lack of a feature. We use ProFTPd that has just
implemented
what is required. I forget the exact details - they are at work - when
the ftp client
asks for the FEAT of the ftp server the server can say use UTF-8.
Supporting
that in the server was apparently none-trivia.
Having an algorithm that says if its a string no problem, if its
a byte deal with the exceptions seems simple.
How do I do this detection with the PEP proposal?
Do I end up using the byte interface and doing the utf-8 decode
myself?
No, you should encode using the "strict" error handler, with the
locale encoding. If the file name encodes successfully, it's correct,
otherwise, it's broken.
O.k. I understand.
Barry
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