I need to create RegExp to validate URL

Question

The regular expression in isURL is not working for all cases.

False negatives (incorrectly returns false):

https://link.springer.com/article/10.1057/s41303-017-0039-0
https://www.academia.edu/12962582/Embodiment_Semiosis._Violi_P

False positives (incorrectly returns true:

3.5/5

Create a regexp which returns true for the following URLs:

http://nonssl.com
https://ssl.com
localhost:3000/
nohttp.com
withslash.com/
sub.domain.com
withpath.com/a/b

And returns false for the following:

e.g.

3.5/5

My current RegExp =

/^(?:http(s)?:\/\/)?[\w.-]+(?:\.[\w-]+)+[\w\-_~:/?#[\]\@!\$&'\(\)\*\+,;=]+$/i

Does this answer your question? [Regex for website or url validation](https://stackoverflow.com/questions/42618872/regex-for-website-or-url-validation) — Karmveer Singh, Jan 28 '20 at 13:57

score 0 · Answer 1 · answered Jan 28 '20 at 14:10

Here is an attempt

You can add test for pathname to be sure

`https://link.springer.com/article/10.1057/s41303-017-0039-0
https://www.academia.edu/12962582/Embodiment_Semiosis._Violi_P
http://nonssl.com
https://ssl.com
localhost:3000/
nohttp.com
withslash.com/
sub.domain.com
withpath.com/a/b
3.5/5`.split("\n")
  .forEach(txt => {
      let url = new URL(txt.indexOf("http") === 0 ? txt : "http://" + txt);
      let testHost = txt.indexOf("http") === 0 ? txt.split("//")[1].split("/")[0] : txt.split("/")[0];
      if (url.port) console.log("port found",testHost, url.hostname, url.port, testHost === url.hostname + ":" + url.port)
        else console.log(testHost, url.hostname, testHost === url.hostname)
      })

I need to create RegExp to validate URL

1 Answers1