Regex to validate url

Question

The url will be something like: meusite.com/user/{keyword here}

The user will only enter the key word, then I would a regex to validate word if this does not invalidate the URL, blank spaces, special characters and 5 to 22 characters.

What characters are valid characters for keyword?

Karolis
– Karolis

2011-09-23 19:56:47 +00:00
Commented Sep 23, 2011 at 19:56 — Karolis
– Karolis, Commented Sep 23, 2011 at 19:56
any character that does not break the link

ridermansb
– ridermansb

2011-09-24 00:24:06 +00:00
Commented Sep 24, 2011 at 0:24 — ridermansb
– ridermansb, Commented Sep 24, 2011 at 0:24

Ry- · Accepted Answer · 2011-09-23 19:56:29Z

1

You just want to validate the keyword? Something like this should work:

/^[a-zA-Z0-9_\-\.\+]{5,22}$/

But why not just escape it?

answered Sep 23, 2011 at 19:56

Ry-♦

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5 Comments

ridermansb Over a year ago

I do not understand, as well as escape?

Ry- Over a year ago

@RidermandeSousaBarbosa: For example, changing spaces to %20 to make it valid. Why not do that?

ridermansb Over a year ago

in fact because of the complexity. Do you have any regex for transform the keyword in a valid url?

Ry- Over a year ago

@RidermandeSousaBarbosa: No, why would you do that with regex? What language are you using? PHP offers urlencode, JavaScript offers encodeURIComponent()...

ridermansb Over a year ago

There is a method: Url.Encode() I think it will solve. Thank you. I had not thought of that.

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