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Regular expression for validating url in javascript

Hi, is a valid URL but the last dot ist usually not written by convention. works in Firefox and IE Just a small comment about brodcast and network address. Ex: If a provider have two class like 205.151.128.0/24 and 205.151.129.0/24, they can combine the two in a classless network: 205.151.128.0/23.

But I'd consider it a good starting point with fewer false positives, and it also matches all the common URL's in this question. Here are some failure scenarios: Putting it against @amon's test cases yields these results: Stuff in parentheses isn't captured, nor IPV6 IP's. You should read the appropriate RFCs which contain relevant parts of the grammar. id=430 In post #21 @erik suggested I consider rewriting the labels matching parts using lookahead. @Etai G many thanks for the review and the good suggestions. I found this out the hard way when I put a question mark after the protocol match, making it optional.... However I have been pushed to "re-read" the specifications throughly and was answered on a V8 ticket here: https://code.google.com/p/v8/issues/detail? and even then, serverside validation would be necessary. Looks like the "allowed a trailing dot" clause is missing a backslash in front of the dot, so it in fact allows a trailing character of any type, including whitespace, since that is the semantics of the . @dperini: I don't believe your javascript one liner will match against the period in front of the TLD without two backslashes. It uses a much larger regular expression then this one. It is easy to just remove the unwanted parts of the validation to fit different scopes (length, precision) so I will probably add more options like the list of existing TLD (possibly grouped), the list of existing protocols and/or a fall back for a more generic protocol match too. my Java Script URI parsing library does strict URI validation as per RFC 3986. The gist have been corrected/updated so it doesn't lock up Chrome Javascript. |1\d\d|2[0-4]\d|25[0-4]))" rxs = rxs "|" 'host name rxs = rxs "(? Now the tests do not lock up Chrome and it also seem the overall speed for URL validation is faster. )*[a-z\u00a1-\uffff0-9] )" 'domain name rxs = rxs "(? If you look to the one liner regular expression there is no place where a backslash need to be escaped. This is my suggested fix: The patterns for username/password are overly lax and allow you to put in almost anything as a url, if you finish with something that looks like @ /@example.com") @gburtini Actually although browsers allow and resolve URLs with IP addresses that are in hexadecimal, octal or without a dot-notation, these formats are made invalid in a URL by RFC 3986: https://org/rfc/rfc3986section $regex = '_^(? " " " " " " " " " " " " " " " Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" q=Spaces should be encoded") Ok @form Validators.uri("//") Ok @form Validators.uri("//a") Ok @form Validators.uri("///a") Ok @form Validators.uri("///") Ok @form Validators.uri(" Ok @form Validators.uri("foo.com") Ok @form Validators.uri("rdar://1234") Ok @form Validators.uri(" shouldfail.com") Ok @form Validators.uri(":// should fail") Ok @form Validators.uri(" quux") Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" @dsgn1graphics, I suggest you check your tests and/or the port of the Regular Expression you are currently using. However I disagree about having patterns that will never be typed by users like "IPV6" and "Puny Code". @dperini, I'm using assert library to write a simple test for a js object in my rails app. Some of the uri formats as tested in @ixti spec above are failing to return false, here's the list. /") Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" Ok @form Validators.uri(" as a quick suggestion you can try something like: (? It's a start anyway Oire, yes I believe it would be a good idea to move this to a Git repo. :" 'IP address exclusion 'private & local networks rxs = rxs "(?!

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