> Quoting is so difficult to get right that if many people reimplement
> quoting, some of the implementations are sure to be wrong simply because
> there are so many corner cases. It seems like this might be one area where
> it would be both beneficial and possible to share code between Python web
> frameworks.
Well, I'm sure someone will come along and out do me, but how about
the following:
def javaScriptEscape(s):
"""Prepare ``s`` for use in a JavaScript quoted string.
Both ``"`` and ``'`` are escaped, so you can use the return value in
either single or double quotes.
"""
if not isinstance(s, unicode):
s = str(s) # Never call str on unicode.
s = "\"'" + s # Force repr to use single quotes.
s = `s`
start, end = 4, -1 # Strip outer quotes and added quotes.
if s.startswith("u"): # JS strings are implicitly unicode.
start += 1
s = s[start:end]
s = s.replace('"', '\\"') # Escape double quotes too.
return s
def javaScriptQuote(s):
"""Escape ``s`` and wrap it in single quotes."""
return "'%s'" % javaScriptEscape(s)
# Do some testing.
if __name__ == '__main__':
for (k, v) in [("", ""),
("a", "a"),
("\t", "\\t"),
("\n", "\\n"),
("'", "\\'"),
('"', '\\"'),
("\377", "\\xff"),
("\xff", "\\xff"),
(u"\u1234", "\\u1234")]:
escaped = javaScriptEscape(k)
if escaped != v:
raise AssertionError(
"javaScriptEscape(%s) led to %s instead of %s" %
(`k`, `escaped`, `v`))
assert javaScriptQuote("foo\n") == "'foo\\n'"
Note, I purposely chose to have two separate functions, because I
sometimes want one, and I sometimes want the other.
If anyone wants this code, please consider it in the public domain.
On the other hand, I wouldn't mind being included in your CONTRIB.
Thanks!
Best Regards,
-jj
--
I have decided to switch to Gmail, but messages to my Yahoo account will
still get through.
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