Payu Helpers for python 2.x .

payu_helper.py

import hashlib

def payu_rounder(value):
    u"""value is a unicode, returns the round according to Payu documentation
    to be used by confirmationUrl
    >>> payu_rounder(u'150.25')
    u'150.2'
    >>> payu_rounder(u'150.35')
    u'150.4'
    >>> payu_rounder(u'150.34')
    u'150.3'
    >>> payu_rounder(u'150.00')
    u'150.0'
    """
    new_value = value
    if new_value[-3] == u'.':
        last_int = int(new_value[-1])
        if last_int < 5 or int(new_value[-2]) % 2 == 0:
            new_value = new_value[:-2] + new_value[-2]
        else:
            new_value = new_value[:-2] + str(int(new_value[-2]) + 1)
    return new_value


def payu_decimal(value):
    u"""value is a unicode, returns the formatting according to Payu
    documentation to be used by responseUrl
    >>> payu_decimal(u'150.00')
    u'150.0'
    >>> payu_decimal(u'150.26')
    u'150.26'
    >>> payu_decimal(u'150.20')
    u'150.2'
    """
    if (value[-1] == u'0' and value[-3] == u'.'):
        return value[:-1]
    return value


def payu_signature(values):
    u"""formtas an array of unicode values and returns the digest expected by
    payu in payment form, responseUrl and confirmationUrl.
    >>> payu_signature([u'6u39nqhq8ftd0hlvnjfs66eh8c', u'500238', u'TestPayU04', u'150.0', u'USD', u'6'])
    '43e44ad9149e23ee4c16ab0646b4c83b'
    >>> payu_signature([u'6u39nqhq8ftd0hlvnjfs66eh8c', u'500238', u'TestPayU05', u'150.26', u'USD', u'4'])
    '91382296898d3937ed36cd125d696452'
    >>> payu_signature([u'6u39nqhq8ftd0hlvnjfs66eh8c', u'500238', u'TestPayU04', u'150.2', u'USD', u'6'])
    '8eebb5af1f32f7a9f930a1038810b854'
    >>> payu_signature([u'6u39nqhq8ftd0hlvnjfs66eh8c', u'500238', u'TestPayU04', u'150.4', u'USD', u'6'])
    'ce2285970f17bb6ce049b56e6b41a255'
    >>> payu_signature([u'6u39nqhq8ftd0hlvnjfs66eh8c', u'500238', u'TestPayU04', u'150.3', u'USD', u'6'])
    '01899cb431dd51623f5c94a62b1d2dc7'
    >>> payu_signature([u'6u39nqhq8ftd0hlvnjfs66eh8c', u'500238', u'TestPayU', u'3', u'USD'])
    'be2f083cb3391c84fdf5fd6176801278'
    """
    md5 = hashlib.md5()
    md5.update(u'~'.join(values))
    return md5.hexdigest()

if __name__ == "__main__":
    import doctest
    doctest.testmod()

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