我正在使用以下正则表达式验证URL。我还要验证 google.com ，但它返回false。可以在下面的R.E中更改以验证 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}$/.test(learnRegExp.arguments[0]);
}
答案 0 :(得分：61)
这会验证一般的网址
console.log('http://www.google-com.123.com', validateUrl('http://www.google-com.123.com')); // true
console.log('http://www.google-com.123', validateUrl('http://www.google-com.123')); // false
console.log('https://www.google-com.com', validateUrl('https://www.google-com.com')); // true
console.log('http://google-com.com', validateUrl('http://google-com.com')); // true
console.log('http://google.com', validateUrl('http://google.com')); //true
console.log('google.com', validateUrl('google.com')); //false
console.log('http://www.gfh.', validateUrl('http://www.gfh.')); //false
console.log('http://www.gfh.c', validateUrl('http://www.gfh.c')); //false
console.log('http://www.gfh:800000', validateUrl('http://www.gfh:800000')); //false
console.log('www.google.com ', validateUrl('www.google.com ')); //false
console.log('http://google', validateUrl('http://google')); //false
console.log('//cdnblabla.cloudfront.net/css/app.css', validateUrl('//cdnblabla.cloudfront.net/css/app.css')); //true
function validateUrl(value) {
return /^(?:(?:(?:https?|ftp):)?\/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})))(?::\d{2,5})?(?:[/?#]\S*)?$/i.test(value);
}
应匹配
["//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*)?$/i.test(value);
}
应该失败
["http://", "http://.", "http://..", "http://../", "http://?", "http://??", "http://??/", "http://#", "http://##", "http://##/", "http://foo.bar?q=Spaces should be encoded", "//", "//a", "///a", "///", "http:///a", "foo.com", "rdar://1234", "h://test", "http:// shouldfail.com", ":// should fail", "http://foo.bar/foo(bar)baz quux", "ftps://foo.bar/", "http://-error-.invalid/", "http://-a.b.co", "http://a.b-.co", "http://0.0.0.0", "http://10.1.1.0", "http://10.1.1.255", "http://224.1.1.1", "http://1.1.1.1.1", "http://123.123.123", "http://3628126748", "http://.www.foo.bar/", "http://www.foo.bar./", "http://.www.foo.bar./", "http://10.1.1.1", "http://10.1.1.254"].map(function(url) {
console.log(url, validateUrl(url));
});
function validateUrl(value) {
return /^(?:(?:(?:https?|ftp):)?\/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})))(?::\d{2,5})?(?:[/?#]\S*)?$/i.test(value);
}
工作原理
// 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*)?"
所有这些都来自gist，我希望这能满足您的所有需求
答案 1 :(得分：6)
这对我来说很完美。我希望它对其他人来说是完美的！ ：）
/^((https?):\/\/)?([w|W]{3}\.)+[a-zA-Z0-9\-\.]{3,}\.[a-zA-Z]{2,}(\.[a-zA-Z]{2,})?$/
答案 2 :(得分：2)
在这里，你需要制作“ftp / http（s）：//”而不是必须。使用 ”？”对此。
function learnRegExp(){
return /((ftp|https?):\/\/)?(www\.)?[a-z0-9\-\.]{3,}\.[a-z]{3}$/.test(learnRegExp.arguments[0]);
}
答案 3 :(得分：0)
/(http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/
答案 4 :(得分：0)
^...符号的开头是这样的，因此最终日志是有意义的，即字符串不以ftp或http（s）开头。你还要用...$说，字符串必须以三个字母结束，而它再次失败（第2行）它不会像这样结束。一些小的调整，你应该在那里。
答案 5 :(得分：0)
为什么每种情况下都没有多个正则表达式？
有效的字母数字网址：/^https?:\/\/([\w\d\-]+\.)+\w{2,}(\/.+)?$/
使用http://sub_do-main.a.co处理https://a.a.a.a.aa/my-awesome_url?asd=12之类的事情。您可以在以下网址尝试使用：std::is_sorted_until
IPv4，短而快速，但不是100％准确的（validator.js使用）：/^(\d{1,3}(\.|$)){4}/。它允许类似999.999.999.999.
^(((25[0-5])|(2[0-4]\d)|(1\d{2})|(\d{1,2}))\.){3}(((25[0-5])|(2[0-4]\d)|(1\d{2})|(\d{1,2})))$。在这里找到它：https://regex101.com/r/oXFuGy/2。^(([\da-fA-F]{0,4}:){1,7}[\da-fA-F]{0,4})$。在这里找到它：https://stackoverflow.com/a/50650510/2862917，这是第一个答案，为什么停止使用会更好regex尝试验证IP（至少是v6）。