KWParser = {
debug_referrer: ''
};
KWParser.search_engines = [
['google', 'google\\.', 'q'], // Google
['yahoo', '([a-zA-Z]{2}\\.)?search\\.yahoo\\.', 'p'], // Yahoo
['bing', 'bing\\.', 'q'], // Bing
['aol', 'search\\.aol\\.', 'query'], // AOL
['ask', 'ask\\.com', 'q'], // Ask.com
['altavista', 'altavista\\.', 'q'], // AltaVista
['lycos', 'search\\.lycos\\.', 'query'], // Lycos
['alltheweb', 'alltheweb\\.', 'q'], // AllTheWeb
['technorati', 'technorati\\.com/search/([^\\?/]+)', 1], // Technorati
['dogpile', 'dogpile\\.com/dogpile/ws/results/Web/([^\\?/]+)', 1, true], // DogPile
['lemos', 'lemos\\.','q'] // LemosNet
];
/**
* Decode the referrer string and return a list of search keywords.
*/
KWParser.decodeReferrer = function(referrer) {
var query = null;
var regex = new RegExp('');
for (var i = 0; i < KWParser.search_engines.length; i ++) {
var se = KWParser.search_engines[i];
regex.compile('^http://(www\\.)?' + se[1], 'i');
var match = referrer.match(regex);
if (match) {
var result;
if (isNaN(se[2])) {
result = KWParser.decodeReferrerQS(referrer, se[2]);
} else {
result = match[se[2] + 1];
}
if (result) {
result = decodeURIComponent(result);
// XXX: DogPile's URI requires decoding twice.
if (se.length > 3 && se[3])
result = decodeURIComponent(result);
result = result.replace(/\'|"/g, '');
result = result.split(/[\s,\+\.]+/);
return [se[0],result];
}
break;
}
}
return null;
};
KWParser.decodeReferrerQS = function(referrer, match) {
var qs = referrer
var re = new RegExp( "[\\?&]?" + match + "=([^&$]*)", "i" );
var result = re.exec( qs );
return result!=null ? result[1] : null;
}
KWParser.parse = function() {
// If 'debug_referrer' then we will use that as our referrer string
// instead.
var q = KWParser.debug_referrer ? KWParser.debug_referrer : document.referrer;
var e = null;
q = KWParser.decodeReferrer(q);
return q;
};
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