tc_url.regex

\b(?:(?:https?|s?ftp|file)://)(?:(?:\b(?=.{4,253})(?:(?:[a-z0-9_-]{1,63}\.){0,124}(?:(?!-)[-a-z0-9]{1,63}(?<!-)\.){0,125}(?![-0-9])[-a-z0-9]{2,24}(?<![-0-9]))\b|\b(?:(?:(?:[0-9]|[1-8][0-9]|9[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}(?:[0-9]|[1-8][0-9]|9[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))\b)(?::(?:[1-9]|[1-8][0-9]|9[0-9]|[1-8][0-9]{2}|9[0-8][0-9]|99[0-9]|[1-8][0-9]{3}|9[0-8][0-9]{2}|99[0-8][0-9]|999[0-9]|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5]))?\b)(?:/[-a-zA-Z0-9_.~%!$&'()*+,;=:@]*)*(?:\?[-a-zA-Z0-9_.~%!$&'()*+,;=:@/?]*#?)?(?:\#[-a-zA-Z0-9_.~%!$&'()*+,;=:@/?]+)?