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regex solution in Clear category for URL Normalization by kdim
import re
def checkio(url):
while re.search(r'(/\.|/\w+/\.\.|:80)(/|$)', url):
url = re.sub(r'(/\.|/\w+/\.\.|:80)(/|$)', r'\2', url)
url = re.sub(r'%[46][1-9A-Fa-f]|%[57][0-9AEFaef]|%2[DdEe]|%3[0-9]', lambda x: chr(int(x.group(0)[1:], 16)), url)
url = re.sub(r'%\w\w', lambda x: x.group(0).upper(), url.lower())
return url
#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
assert checkio("Http://Www.Checkio.org") == \
"http://www.checkio.org", "1st rule"
assert checkio("http://www.checkio.org/%cc%b1bac") == \
"http://www.checkio.org/%CC%B1bac", "2nd rule"
assert checkio("http://www.checkio.org/task%5F%31") == \
"http://www.checkio.org/task_1", "3rd rule"
assert checkio("http://www.checkio.org:80/home/") == \
"http://www.checkio.org/home/", "4th rule"
assert checkio("http://www.checkio.org:8080/home/") == \
"http://www.checkio.org:8080/home/", "4th rule again"
assert checkio("http://www.checkio.org/task/./1/../2/././name") == \
"http://www.checkio.org/task/2/name", "5th rule"
print('First set of tests done')
Oct. 31, 2021
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