app/django/utils/http.py
author Madhusudan.C.S <madhusudancs@gmail.com>
Wed, 03 Jun 2009 23:38:02 +0530
changeset 2385 174e946039e0
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permissions -rw-r--r--
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import urllib
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from email.Utils import formatdate
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from django.utils.encoding import smart_str, force_unicode
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from django.utils.functional import allow_lazy
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def urlquote(url, safe='/'):
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    """
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    A version of Python's urllib.quote() function that can operate on unicode
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    strings. The url is first UTF-8 encoded before quoting. The returned string
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    can safely be used as part of an argument to a subsequent iri_to_uri() call
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    without double-quoting occurring.
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    """
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    return force_unicode(urllib.quote(smart_str(url), safe))
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urlquote = allow_lazy(urlquote, unicode)
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def urlquote_plus(url, safe=''):
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    """
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    A version of Python's urllib.quote_plus() function that can operate on
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    unicode strings. The url is first UTF-8 encoded before quoting. The
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    returned string can safely be used as part of an argument to a subsequent
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    iri_to_uri() call without double-quoting occurring.
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    """
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    return force_unicode(urllib.quote_plus(smart_str(url), safe))
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urlquote_plus = allow_lazy(urlquote_plus, unicode)
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def urlencode(query, doseq=0):
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    """
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    A version of Python's urllib.urlencode() function that can operate on
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    unicode strings. The parameters are first case to UTF-8 encoded strings and
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    then encoded as per normal.
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    """
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    if hasattr(query, 'items'):
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        query = query.items()
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    return urllib.urlencode(
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        [(smart_str(k),
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         isinstance(v, (list,tuple)) and [smart_str(i) for i in v] or smart_str(v))
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            for k, v in query],
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        doseq)
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def cookie_date(epoch_seconds=None):
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    """
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    Formats the time to ensure compatibility with Netscape's cookie standard.
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    Accepts a floating point number expressed in seconds since the epoch, in
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    UTC - such as that outputted by time.time(). If set to None, defaults to
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    the current time.
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    Outputs a string in the format 'Wdy, DD-Mon-YYYY HH:MM:SS GMT'.
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    """
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    rfcdate = formatdate(epoch_seconds)
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    return '%s-%s-%s GMT' % (rfcdate[:7], rfcdate[8:11], rfcdate[12:25])
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def http_date(epoch_seconds=None):
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    """
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    Formats the time to match the RFC1123 date format as specified by HTTP
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    RFC2616 section 3.3.1.
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    Accepts a floating point number expressed in seconds since the epoch, in
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    UTC - such as that outputted by time.time(). If set to None, defaults to
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    the current time.
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    Outputs a string in the format 'Wdy, DD Mon YYYY HH:MM:SS GMT'.
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    """
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    rfcdate = formatdate(epoch_seconds)
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    return '%s GMT' % rfcdate[:25]
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# Base 36 functions: useful for generating compact URLs
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def base36_to_int(s):
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    """
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    Convertd a base 36 string to an integer
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    """
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    return int(s, 36)
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def int_to_base36(i):
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    """
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    Converts an integer to a base36 string
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    """
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    digits = "0123456789abcdefghijklmnopqrstuvwxyz"
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    factor = 0
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    # Find starting factor
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    while True:
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        factor += 1
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        if i < 36 ** factor:
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            factor -= 1
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            break
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    base36 = []
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    # Construct base36 representation
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    while factor >= 0:
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        j = 36 ** factor
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        base36.append(digits[i / j])
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        i = i % j
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        factor -= 1
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    return ''.join(base36)