Glenn Linderman <v+pyt...@g.nevcal.com> added the comment:
Pierre, thanks for your work on this. I hope a fix can make it in to 3.2.
However, while starting Python with -u can help a but, that should not, in my
opinion, be requirement to use CGI. Rather, the stdin should be set into
binary mode by the CGI processing... it would be helpful if the CGI module
either did it automatically, verified it has been done, or at least provided a
helper function that could do it, and that appropriate documentation be
provided, if it is not automatic. I've seen code like:
try: # Windows needs stdio set for binary mode.
import msvcrt
msvcrt.setmode (0, os.O_BINARY) # stdin = 0
msvcrt.setmode (1, os.O_BINARY) # stdout = 1
msvcrt.setmode (2, os.O_BINARY) # stderr = 2
except ImportError:
pass
and
if hasattr( sys.stdin, 'buffer'):
sys.stdin = sys.stdin.buffer
which together, seem to do the job. For output, I use a little class that
accepts either binary or text, encoding the latter:
class IOMix():
def __init__( self, fh, encoding="UTF-8"):
if hasattr( fh, 'buffer'):
self._bio = fh.buffer
fh.flush()
self._last = 'b'
import io
self._txt = io.TextIOWrapper( self.bio, encoding, None, '\r\n')
self._encoding = encoding
else:
raise ValueError("not a buffered stream")
def write( self, param ):
if isinstance( param, str ):
self._last = 't'
self._txt.write( param )
else:
if self._last == 't':
self._txt.flush()
self._last = 'b'
self._bio.write( param )
def flush( self ):
self._txt.flush()
def close( self ):
self.flush()
self._txt.close()
self._bio.close()
sys.stdout = IOMix( sys.stdout, encoding )
sys.stderr = IOMix( sys.stderr, encoding )
IOMix may need a few more methods for general use, "print" comes to mind, for
example.
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<http://bugs.python.org/issue4953>
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