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Use unicode.translate to speed up js escaping.

This commit is contained in:
Dave Hall 2012-09-18 11:28:49 +01:00 committed by Florian Apolloner
parent 40e62a5ccd
commit 44767f2caf
1 changed files with 15 additions and 18 deletions
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33
django/utils/html.py
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@ -42,29 +42,26 @@ def escape(text):
return mark_safe(force_text(text).replace('&', '&amp;').replace('<', '&lt;').replace('>', '&gt;').replace('"', '&quot;').replace("'", '&#39;'))
escape = allow_lazy(escape, six.text_type)
_base_js_escapes = (
('\\', '\\u005C'),
('\'', '\\u0027'),
('"', '\\u0022'),
('>', '\\u003E'),
('<', '\\u003C'),
('&', '\\u0026'),
('=', '\\u003D'),
('-', '\\u002D'),
(';', '\\u003B'),
('\u2028', '\\u2028'),
('\u2029', '\\u2029')
)
_js_escapes = {
ord('\\'): '\\u005C',
ord('\''): '\\u0027',
ord('"'): '\\u0022',
ord('>'): '\\u003E',
ord('<'): '\\u003C',
ord('&'): '\\u0026',
ord('='): '\\u003D',
ord('-'): '\\u002D',
ord(';'): '\\u003B',
ord('\u2028'): '\\u2028',
ord('\u2029'): '\\u2029'
}
# Escape every ASCII character with a value less than 32.
_js_escapes = (_base_js_escapes +
tuple([('%c' % z, '\\u%04X' % z) for z in range(32)]))
_js_escapes.update((ord('%c' % z), '\\u%04X' % z) for z in range(32))
def escapejs(value):
"""Hex encodes characters for use in JavaScript strings."""
for bad, good in _js_escapes:
value = mark_safe(force_text(value).replace(bad, good))
return value
return mark_safe(force_text(value).translate(_js_escapes))
escapejs = allow_lazy(escapejs, six.text_type)
def conditional_escape(text):