Expresión regular de Javascript para validar la URL

Question

Estoy validando la URL con la siguiente expresión regular. Quiero validar google.com también pero devuelve falso. Qué se puede cambiar en R.E a continuación para validar google.com.

console.log(learnRegExp('http://www.google-com.123')); // false 
console.log(learnRegExp('https://www.google-com.com')); // true 
console.log(learnRegExp('http://google-com.com')); // true 
console.log(learnRegExp('http://google.com')); //true 
console.log(learnRegExp('google.com')); //false 

function learnRegExp(){ 
    return /^(ftp|https?):\/\/+(www\.)?[a-z0-9\-\.]{3,}\.[a-z]{3}$/.test(learnRegExp.arguments[0]); 
} 

Answer 1

/(http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/ 

Answer 2

^... símbolo está diciendo lo que comienza con el registro de última tiene sentido, es decir, la cadena no empieza con FTP o HTTP (s). También está diciendo con ...$ que el final de la cadena debe terminar con tres letras que, una vez más, donde falla (línea 2), no termina así. Algunos ajustes menores y debes estar allí.

Answer 3

Aquí tienes, necesitas hacer "ftp/http (s): //" no es IMPRESCINDIBLE. Utilizar "?" para esto.

function learnRegExp(){ 
    return /((ftp|https?):\/\/)?(www\.)?[a-z0-9\-\.]{3,}\.[a-z]{3}$/.test(learnRegExp.arguments[0]); 
} 

Answer 4

Este validar la dirección URL en general

console.log('http://www.google-com.123.com', validateUrl('http://www.google-com.123.com')); // true 
 
console.log('http://www.google-com.123', validateUrl('http://www.google-com.123')); // false 
 
console.log('https://www.google-com.com', validateUrl('https://www.google-com.com')); // true 
 
console.log('http://google-com.com', validateUrl('http://google-com.com')); // true 
 
console.log('http://google.com', validateUrl('http://google.com')); //true 
 
console.log('google.com', validateUrl('google.com')); //false 
 
console.log('http://www.gfh.', validateUrl('http://www.gfh.')); //false 
 
console.log('http://www.gfh.c', validateUrl('http://www.gfh.c')); //false 
 
console.log('http://www.gfh:800000', validateUrl('http://www.gfh:800000')); //false 
 
console.log('www.google.com ', validateUrl('www.google.com ')); //false 
 
console.log('http://google', validateUrl('http://google')); //false 
 
console.log('//cdnblabla.cloudfront.net/css/app.css', validateUrl('//cdnblabla.cloudfront.net/css/app.css')); //true 
 

 
function validateUrl(value) { 
 
    return /^(?:(?:(?:https?|ftp):)?\/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})))(?::\d{2,5})?(?:[/?#]\S*)?$/i.test(value); 
 
}

debe coincidir con

["//www.google.com", "//cdnblabla.cloudfront.net/css/app.css", "http://✪df.ws/123", "http://userid:password@example.com:8080", "http://userid:password@example.com:8080/", "http://userid@example.com", "http://userid@example.com/", "http://userid@example.com:8080", "http://userid@example.com:8080/", "http://userid:password@example.com", "http://userid:password@example.com/", "http://142.42.1.1/", "http://142.42.1.1:8080/", "http://➡.ws/䨹", "http://⌘.ws", "http://⌘.ws/", "http://foo.com/blah_(wikipedia)#cite-1", "http://foo.com/blah_(wikipedia)_blah#cite-1", "http://foo.com/unicode_(✪)_in_parens", "http://foo.com/(something)?after=parens", "http://☺.damowmow.com/", "http://code.google.com/events/#&product=browser", "http://j.mp", "ftp://foo.bar/baz", "http://foo.bar/?q=Test%20URL-encoded%20stuff", "http://مثال.إختبار", "http://例子.测试"].map(function(url) { 
 
    console.log(url, validateUrl(url)); 
 
}); 
 

 
function validateUrl(value) { 
 
    return /^(?:(?:(?:https?|ftp):)?\/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})))(?::\d{2,5})?(?:[/?#]\S*)?$/i.test(value); 
 
}

fallara

["http://", "http://.", "http://..", "http://../", "http://?", "http://??", "http://??/", "http://#", "http://##", "http://##/", "http://foo.bar?q=Spaces should be encoded", "//", "//a", "///a", "///", "http:///a", "foo.com", "rdar://1234", "h://test", "http:// shouldfail.com", ":// should fail", "http://foo.bar/foo(bar)baz quux", "ftps://foo.bar/", "http://-error-.invalid/", "http://-a.b.co", "http://a.b-.co", "http://0.0.0.0", "http://10.1.1.0", "http://10.1.1.255", "http://224.1.1.1", "http://1.1.1.1.1", "http://123.123.123", "http://3628126748", "http://.www.foo.bar/", "http://www.foo.bar./", "http://.www.foo.bar./", "http://10.1.1.1", "http://10.1.1.254"].map(function(url) { 
 
    console.log(url, validateUrl(url)); 
 
}); 
 

 
function validateUrl(value) { 
 
    return /^(?:(?:(?:https?|ftp):)?\/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})))(?::\d{2,5})?(?:[/?#]\S*)?$/i.test(value); 
 
}

Cómo funciona

// protocol identifier 
"(?:(?:(?:https?|ftp):)?//)" 
// user:pass authentication 
"(?:\\S+(?::\\S*)?@)?" 
"(?:" 
// IP address exclusion 
// private & local networks 
"(?!(?:10|127)(?:\\.\\d{1,3}){3})" 
"(?!(?:169\\.254|192\\.168)(?:\\.\\d{1,3}){2})" 
"(?!172\\.(?:1[6-9]|2\\d|3[0-1])(?:\\.\\d{1,3}){2})" 
// IP address dotted notation octets 
// excludes loopback network 0.0.0.0 
// excludes reserved space >= 224.0.0.0 
// excludes network & broacast addresses 
// (first & last IP address of each class) 
"(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])" 
"(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}" 
"(?:\\.(?:[1-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))" 
"|" 
// host name 
"(?:(?:[a-z\\u00a1-\\uffff0-9]-*)*[a-z\\u00a1-\\uffff0-9]+)" 
// domain name 
"(?:\\.(?:[a-z\\u00a1-\\uffff0-9]-*)*[a-z\\u00a1-\\uffff0-9]+)*" 
// TLD identifier 
"(?:\\.(?:[a-z\\u00a1-\\uffff]{2,})))" 
// port number 
"(?::\\d{2,5})?" 
// resource path 
"(?:[/?#]\\S*)?" 

Todo esto proviene de esta gist, espero que este llene todas sus necesidades

Answer 5

Esto es perfecto para mí. ¡Espero que sea perfecto para otra persona! :)

/^((https?):\/\/)?([w|W]{3}\.)+[a-zA-Z0-9\-\.]{3,}\.[a-zA-Z]{2,}(\.[a-zA-Z]{2,})?$/