正则表达式仅查找有效的url +文本python

Question

I have a regex

((http\://|https\://|ftp\://)|(www.)|([a-zA-Z0-9\.-]))+(([a-zA-Z0-9\.-]+\.[a-zA-Z]{2,4}))(/[a-zA-Z0-9%:/-_\?\.'~#-]*)? 

which is picking valid url perfectly.

I have a scenario where there can be

1. VALID URL + TEXT or (www.abc.com testing the regex)
2. Text + VALID URL (Testing the regex www.abc.com)

REQ:

What i want is first the regex check the valid url then if url is valid it ignores the Valid url and search TEXT only outside the Valid URL.

Issues:

I have tried many regex but it is picking the valid url also which i don't want i only want if url is valid search for the text outside the url.

NO function Please . I am trying to fix this using Regex.

Answer 1

Perhaps you want this:

(.*?)((?:(?:http\:\/\/|https\:\/\/|ftp\:\/\/)|(?:www.)|(?:[a-zA-Z0-9\.-]))+(?:(?:[a-zA-Z0-9\.-]+\.[a-zA-Z]{2,4}))(?:\/[a-zA-Z0-9%:\/-_\?\.'~#-]*)?)(.*)

See demo here:

You will get three groups, you can used named groups to catpure beforeUrl text, Url and afterUrl text, which will be something like this:

(?<beforeUrl>.*?)(?<Url>(?:(?:http\:\/\/|https\:\/\/|ftp\:\/\/)|(?:www.)|(?:[a-zA-Z0-9\.-]))+(?:(?:[a-zA-Z0-9\.-]+\.[a-zA-Z]{2,4}))(?:\/[a-zA-Z0-9%:\/-_\?\.'~#-]*)?)(?<afterUrl>.*)

See demo here.