154 lines
4.0 KiB
JavaScript
154 lines
4.0 KiB
JavaScript
(function(module) {
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'use strict';
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module.exports.is_uri = is_iri;
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module.exports.is_http_uri = is_http_iri;
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module.exports.is_https_uri = is_https_iri;
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module.exports.is_web_uri = is_web_iri;
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// Create aliases
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module.exports.isUri = is_iri;
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module.exports.isHttpUri = is_http_iri;
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module.exports.isHttpsUri = is_https_iri;
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module.exports.isWebUri = is_web_iri;
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// private function
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// internal URI spitter method - direct from RFC 3986
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var splitUri = function(uri) {
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var splitted = uri.match(/(?:([^:\/?#]+):)?(?:\/\/([^\/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?/);
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return splitted;
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};
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function is_iri(value) {
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if (!value) {
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return;
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}
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// check for illegal characters
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if (/[^a-z0-9\:\/\?\#\[\]\@\!\$\&\'\(\)\*\+\,\;\=\.\-\_\~\%]/i.test(value)) return;
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// check for hex escapes that aren't complete
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if (/%[^0-9a-f]/i.test(value)) return;
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if (/%[0-9a-f](:?[^0-9a-f]|$)/i.test(value)) return;
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var splitted = [];
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var scheme = '';
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var authority = '';
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var path = '';
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var query = '';
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var fragment = '';
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var out = '';
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// from RFC 3986
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splitted = splitUri(value);
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scheme = splitted[1];
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authority = splitted[2];
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path = splitted[3];
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query = splitted[4];
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fragment = splitted[5];
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// scheme and path are required, though the path can be empty
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if (!(scheme && scheme.length && path.length >= 0)) return;
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// if authority is present, the path must be empty or begin with a /
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if (authority && authority.length) {
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if (!(path.length === 0 || /^\//.test(path))) return;
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} else {
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// if authority is not present, the path must not start with //
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if (/^\/\//.test(path)) return;
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}
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// scheme must begin with a letter, then consist of letters, digits, +, ., or -
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if (!/^[a-z][a-z0-9\+\-\.]*$/.test(scheme.toLowerCase())) return;
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// re-assemble the URL per section 5.3 in RFC 3986
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out += scheme + ':';
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if (authority && authority.length) {
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out += '//' + authority;
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}
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out += path;
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if (query && query.length) {
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out += '?' + query;
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}
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if (fragment && fragment.length) {
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out += '#' + fragment;
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}
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return out;
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}
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function is_http_iri(value, allowHttps) {
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if (!is_iri(value)) {
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return;
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}
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var splitted = [];
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var scheme = '';
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var authority = '';
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var path = '';
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var port = '';
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var query = '';
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var fragment = '';
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var out = '';
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// from RFC 3986
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splitted = splitUri(value);
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scheme = splitted[1];
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authority = splitted[2];
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path = splitted[3];
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query = splitted[4];
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fragment = splitted[5];
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if (!scheme) return;
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if(allowHttps) {
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if (scheme.toLowerCase() != 'https') return;
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} else {
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if (scheme.toLowerCase() != 'http') return;
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}
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// fully-qualified URIs must have an authority section that is
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// a valid host
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if (!authority) {
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return;
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}
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// enable port component
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if (/:(\d+)$/.test(authority)) {
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port = authority.match(/:(\d+)$/)[0];
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authority = authority.replace(/:\d+$/, '');
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}
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out += scheme + ':';
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out += '//' + authority;
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if (port) {
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out += port;
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}
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out += path;
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if(query && query.length){
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out += '?' + query;
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}
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if(fragment && fragment.length){
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out += '#' + fragment;
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}
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return out;
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}
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function is_https_iri(value) {
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return is_http_iri(value, true);
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}
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function is_web_iri(value) {
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return (is_http_iri(value) || is_https_iri(value));
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}
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})(module);
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