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python: Make invalid UTF-8 sequence messages consistent across Python versions.

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Given the invalid input <C0 22>, some versions of Python report <C0> as the
invalid sequence and other versions report <C0 22> as the invalid sequence.
Similarly, given input <ED 80 7F>, some report <ED 80> and others report
<ED 80 7F> as the invalid sequence.  This caused spurious test failures for
the test "no invalid UTF-8 sequences in strings - Python", so this commit
makes the messages consistent by dropping the extra trailing byte from the
message.

I first noticed the longer sequences <C0 22> and <ED 80 7F> on Ubuntu
10.04 with python version 2.6.5-0ubuntu1, but undoubtedly it exists
elsewhere also.
This commit is contained in:
Ben Pfaff
2011-07-01 10:11:30 -07:00
parent 391614125f
commit 070de9bd41
1 changed files with 2 additions and 1 deletions
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3
python/ovs/json.py
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@@ -113,7 +113,8 @@ def from_string(s):
try:
s = unicode(s, 'utf-8')
except UnicodeDecodeError, e:
seq = ' '.join(["0x%2x" % ord(c) for c in e.object[e.start:e.end]])
seq = ' '.join(["0x%2x" % ord(c)
for c in e.object[e.start:e.end] if ord(c) >= 0x80])
return ("not a valid UTF-8 string: invalid UTF-8 sequence %s" % seq)
p = Parser(check_trailer=True)
p.feed(s)