Parse HTTP Link header in Javascript

linkheaderparser.js

// parse a Link header
//
// Link:<https://example.org/.meta>; rel=meta
//
// var r = parseLinkHeader(xhr.getResponseHeader('Link');
// r['meta'] outputs https://example.org/.meta
//
function parseLinkHeader(header) {
    var linkexp = /<[^>]*>\s*(\s*;\s*[^\(\)<>@,;:"\/\[\]\?={} \t]+=(([^\(\)<>@,;:"\/\[\]\?={} \t]+)|("[^"]*")))*(,|$)/g;
    var paramexp = /[^\(\)<>@,;:"\/\[\]\?={} \t]+=(([^\(\)<>@,;:"\/\[\]\?={} \t]+)|("[^"]*"))/g;

    var matches = link.match(linkexp);
    var rels = {};
    for (var i = 0; i < matches.length; i++) {
        var split = matches[i].split('>');
        var href = split[0].substring(1);
        var ps = split[1];
        var s = ps.match(paramexp);
        for (var j = 0; j < s.length; j++) {
            var p = s[j];
            var paramsplit = p.split('=');
            var name = paramsplit[0];
            var rel = paramsplit[1].replace(/["']/g, '');
            rels[rel] = href;
        }
    }
    return rels;
}