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Speed up IDNA for the common case

This commit is contained in:
Antoine Pitrou 2011-11-10 22:49:20 +01:00
parent de20b0b50e
commit 9768676f6f
1 changed files with 22 additions and 0 deletions
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22
Lib/encodings/idna.py
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@ -153,6 +153,20 @@ class Codec(codecs.Codec):
if not input: if not input:
return b'', 0 return b'', 0
try:
result = input.encode('ascii')
except UnicodeEncodeError:
pass
else:
# ASCII name: fast path
labels = result.split(b'.')
for label in labels[:-1]:
if not (0 < len(label) < 64):
raise UnicodeError("label empty or too long")
if len(labels[-1]) >= 64:
raise UnicodeError("label too long")
return result, len(input)
result = bytearray() result = bytearray()
labels = dots.split(input) labels = dots.split(input)
if labels and not labels[-1]: if labels and not labels[-1]:
@ -179,6 +193,14 @@ class Codec(codecs.Codec):
if not isinstance(input, bytes): if not isinstance(input, bytes):
# XXX obviously wrong, see #3232 # XXX obviously wrong, see #3232
input = bytes(input) input = bytes(input)
if ace_prefix not in input:
# Fast path
try:
return input.decode('ascii'), len(input)
except UnicodeDecodeError:
pass
labels = input.split(b".") labels = input.split(b".")
if labels and len(labels[-1]) == 0: if labels and len(labels[-1]) == 0: