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38 lines
1.4 KiB
Python
38 lines
1.4 KiB
Python
import re
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from lib.core.convert import urldecode
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from lib.core.convert import urlencode
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"""
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IFNULL(A,B) -> IF(ISNULL(A),B,A) (e.g., IFNULL(1,2) -> IF(ISNULL(1),2,1))
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"""
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def tamper(place, value):
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if value and value.find("IFNULL") > -1:
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if place != "URI":
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value = urldecode(value)
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#value = re.sub(r"IFNULL\(\({%d}(?P<A>.+?)\){%d},(?P<B>.+?)\)" % (num, num), lambda match: "IF(ISNULL(%s),%s,%s)" % (match.group("A"), match.group("B"), match.group("A")), value)
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while value.find("IFNULL(") > -1:
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index = value.find("IFNULL(")
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deepness = 1
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comma, end = None, None
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for i in xrange(index + len("IFNULL("), len(value)):
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if deepness == 1 and value[i] == ',':
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comma = i
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elif deepness == 1 and value[i] == ')':
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end = i
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break
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elif value[i] == '(':
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deepness += 1
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elif value[i] == ')':
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deepness -= 1
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if comma and end:
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A = value[index + len("IFNULL("):comma]
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B = value[comma + 1:end]
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newVal = "IF(ISNULL(%s),%s,%s)" % (A, B, A)
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value = value[:index] + newVal + value[end+1:]
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else:
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break
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if place != "URI":
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value = urlencode(value)
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return value
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