Created
August 26, 2016 21:46
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// Derived from https://gist.github.com/dperini/729294 | |
function isURL(extensions) { | |
var resource = '?'; | |
if (extensions) resource = '\.(' + extensions.join('|') + ')'; | |
return new RegExp( | |
// 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,}))' + | |
// TLD may end with dot | |
'\\.?' + | |
')' + | |
// port number | |
'(?::\\d{2,5})?' + | |
// resource path | |
'(?:[/?#]\\S*)' + resource, 'igm' | |
); | |
} |
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