Find and Replace a URL using Regex

Question

I've read few articles and posts but I couldn't find out a solution in removing a specific url from a text. I have tried at least 3 different expressions. It's good to know that I'm doing it programmatically (C#).

(?<!"")((www\.|(http|https|ftp|news|file)+\:\/\/)[_.a-z0-9-]+\.[a-z0-9\/_:@=.+?,##%&amp;~-]*[^.|\'|\# |!|\(|?|,| |>|<|;|\)])(?!"")

((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*))?)

(?<!\w?="")(((http|https|ftp|news|file)+://)[_.a-z0-9-]+\.[a-z0-9\/_:@=.+?,##%&‌amp;~-]*[^.|\'|\# |!|\(|?|,| |>|<|;|\)])

The example url is below. Note that not all urls will be exactly like that. This is the worst one.

http://api.ning.com/files/tHduipNJAW29nIL5jzWbrYON5NhTKYVXmzollyMEHasDDvnq1454BrFkXFfmzj1gH7Ye3xw03C9ulNTICYAdueKg6vaIeu/PauloSkaf.png

Could someone guide me to the solution?

UPDATE

As hwnd mentioned the best pattern is

https?\S+

@Gandarez Are there any more urls like this that starts off with api.ning.com ? — hwnd
– hwnd, Commented Aug 13, 2014 at 23:50
@hwnd I can't say yes because I'm invoking a third party service which provides to me this data. — gandarez
– gandarez, Commented Aug 14, 2014 at 0:00

Community · Accepted Answer · 2017-05-23 11:49:31Z

5

I'm not fully sure what is your need but if you want to remove that url from a text, you can use a regex like this:

https?:.*(?=\s)

Working demo

Check the substitution section

enter image description here

By the way, if you want to remove whatever protocol you could use this one:

\w+:\/\/.*?(?=\s)

Working demo

enter image description here

As hwnd pointed in the comment, you can improve above regex by using:

\w+:\/\/\S*

edited May 23, 2017 at 11:49

CommunityBot

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answered Aug 13, 2014 at 23:50

Federico Piazza

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6 Comments

hwnd Over a year ago

much easier to use https?://\S+

Federico Piazza Over a year ago

@hwnd you are totally right, I don't know why I always forgot about this. I'll point that in the answer. You rock man, I always learn from you +1

gandarez Over a year ago

Take a look at this url regex101.com/r/pO8qW1/5 I used your pattern to match my text.

Federico Piazza Over a year ago

@Gandarez you should use the last update in my answer from hwnd comment. You can look it here regex101.com/r/pO8qW1/6

Federico Piazza Over a year ago

@hwnd the tick is for you. Thanks for help me improving the answer.

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