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import re
always_safe = ('ABCDEFGHIJKLMNOPQRSTUVWXYZ'
'abcdefghijklmnopqrstuvwxyz'
'0123456789' '_.-')
_safemaps = {}
_must_quote = {}
def url_quote(s, safe=''):
"""quote('abc def') -> 'abc%20def'
Each part of a URL, e.g. the path info, the query, etc., has a
different set of reserved characters that must be quoted.
RFC 2396 Uniform Resource Identifiers (URI): Generic Syntax lists
the following reserved characters::
reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
"$" | ","
Each of these characters is reserved in some component of a URL,
but not necessarily in all of them.
Unlike the default version of this function in the Python stdlib, by
default, the url_quote function is intended for quoting individual path
segments instead of an already composed path that might have ``/``
characters in it. Thus, it *will* encode any ``/`` character it finds in a
string unless ``/`` is marked as 'safe'. It is also slightly faster than
the stdlib version.
"""
cachekey = (safe, always_safe)
try:
safe_map = _safemaps[cachekey]
if not _must_quote[cachekey].search(s):
return s
except KeyError:
safe += always_safe
_must_quote[cachekey] = re.compile(r'[^%s]' % safe)
safe_map = {}
for i in range(256):
c = chr(i)
if c in safe:
safe_map[c] = c
else:
safe_map[c] = '%%%02X' % i
_safemaps[cachekey] = safe_map
res = map(safe_map.__getitem__, s)
return ''.join(res)
def quote_plus(s, safe=''):
""" Version of stdlib quote_plus which uses faster url_quote """
if ' ' in s:
s = url_quote(s, safe + ' ')
return s.replace(' ', '+')
return url_quote(s, safe)
def urlencode(query, doseq=True):
"""
An alternate implementation of Python's stdlib `urllib.urlencode
function <http://docs.python.org/library/urllib.html>`_ which
accepts unicode keys and values within the ``query``
dict/sequence; all Unicode keys and values are first converted to
UTF-8 before being used to compose the query string.
The value of ``query`` must be a sequence of two-tuples
representing key/value pairs *or* an object (often a dictionary)
with an ``.items()`` method that returns a sequence of two-tuples
representing key/value pairs.
For minimal calling convention backwards compatibility, this
version of urlencode accepts *but ignores* a second argument
conventionally named ``doseq``. The Python stdlib version behaves
differently when ``doseq`` is False and when a sequence is
presented as one of the values. This version always behaves in
the ``doseq=True`` mode, no matter what the value of the second
argument.
See the Python stdlib documentation for ``urllib.urlencode`` for
more information.
"""
try:
# presumed to be a dictionary
query = query.items()
except AttributeError:
pass
result = ''
prefix = ''
for (k, v) in query:
if k.__class__ is unicode:
k = k.encode('utf-8')
k = quote_plus(str(k))
if hasattr(v, '__iter__'):
for x in v:
if x.__class__ is unicode:
x = x.encode('utf-8')
x = quote_plus(str(x))
result += '%s%s=%s' % (prefix, k, x)
prefix = '&'
else:
if v.__class__ is unicode:
v = v.encode('utf-8')
v = quote_plus(str(v))
result += '%s%s=%s' % (prefix, k, v)
prefix = '&'
return result
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