112 lines
3.8 KiB
JavaScript
112 lines
3.8 KiB
JavaScript
/* Referrer Metadata support for Creative Commons License Deeds */
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function makeRequest(url) {
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var http_request = false;
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if (window.XMLHttpRequest) { // Mozilla, Safari, ...
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http_request = new XMLHttpRequest();
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if (http_request.overrideMimeType) {
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http_request.overrideMimeType('text/plain');
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// See note below about this line
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}
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} else if (window.ActiveXObject) { // IE
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try {
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http_request = new ActiveXObject("Msxml2.XMLHTTP");
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} catch (e) {
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try {
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http_request = new ActiveXObject("Microsoft.XMLHTTP");
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} catch (e) {}
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}
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}
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if (!http_request) {
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//alert('Giving up :( Cannot create an XMLHTTP instance');
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return false;
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}
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http_request.onreadystatechange = function() {
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processResponse(http_request);
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};
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http_request.open('GET', url, true);
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http_request.send(null);
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}
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function processResponse(http_request) {
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if (http_request.readyState == 4) {
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if (http_request.status == 200) {
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injectReferrerMetadata(http_request.responseText);
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} else {
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//alert('There was a problem with the request.');
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}
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}
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}
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function addQSParameter(url, key, value) {
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var url_nohash = url;
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var hash = '';
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var hash_index = (url.indexOf('#'));
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if (hash_index != -1) {
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url_nohash = url.substring(0, hash_index);
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hash = url.substring(hash_index);
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}
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url_nohash += (url.indexOf('?') == -1) ? '?' : '&';
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url_nohash += key + '=' + value;
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return url_nohash + hash;
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}
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function injectReferrerMetadata(response) {
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metadata = eval(response);
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var attributionName = metadata.attributionName;
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var attributionUrl = metadata.attributionUrl;
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if (attributionName && attributionUrl) {
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document.getElementById('attribution-container').innerHTML = "You must attribute this work to <strong><a href='" + attributionUrl + "'>" + attributionName + "</a></strong> (with link)."; // <a onclick=\"window.open('/includes/by-popup.html', 'attribution_help', 'width=375,height=300,scrollbars=yes,resizable=yes,toolbar=no,directories=no,location=yes,menubar=no,status=yes');return false;\" href=''>Find out how.</a>";
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}
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var morePermissionsURL = metadata.morePermissions;
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var morePermissionsDomain = metadata.morePermissionsDomain;
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morePermissionsURL = addQSParameter(morePermissionsURL, 'cc-referrer', document.referrer);
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var more_perms = '';
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if (morePermissionsURL && morePermissionsDomain) {
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more_perms = "<strong>Permissions beyond</strong> the scope of this public license are available at <strong><a href='";
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more_perms += morePermissionsURL;
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more_perms += "'>" + morePermissionsDomain + "</a></strong>.</li>";
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}
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if (metadata.commercialLicense && metadata.morePermissionsAgent) {
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if (more_perms) more_perms += '<br/>';
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more_perms += '<strong>Commerciële Rechten</strong>. ';
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more_perms += 'Licenties voor commercieel gebruik zijn via';
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more_perms += ' <strong><a href="' + metadata.commercialLicense + '">';
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more_perms += metadata.morePermissionsAgent + '</a></strong> verkrijgbaar.';
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} // commercial license
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// set the more perms / commercial usage statement
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if (more_perms) {
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document.getElementById('more-container').innerHTML = more_perms;
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document.getElementById('more-container').setAttribute("class", "license more");
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}
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var noncomm_ads = metadata.allowAdvertising;
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if (document.getElementById('nc-more-container') && noncomm_ads) {
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// this is a non-comm license
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document.getElementById('nc-more-container').innerHTML = noncomm_ads;
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}
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} // injectReferrerMetadata
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function referrerMetadata() {
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r = document.referrer;
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if (r.match('^http://')) makeRequest('/apps/scrape?url='+encodeURIComponent(r));
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}
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