Function extFromMimeAndUrl

Picviewer CE+/dist.user.js:12580–12596

(mimeType, url)

    }
    var cookie;
    function extFromMimeAndUrl(mimeType, url) {
        let ext = '';
        if (mimeType) {
            const cleanMime = mimeType.split(';')[0].trim().toLowerCase();
            if (cleanMime.indexOf('image/') === 0) {
                ext = cleanMime.slice(6);
            } else if (cleanMime.indexOf('text/html') === 0) {
                ext = 'text/html';
            }
        }
        if (!ext) {
            const m = String(url || '').match(/\.([a-z0-9]+)(?:$|[?#])/i);
            ext = m ? m[1].toLowerCase() : '';
        }
        if (ext.indexOf('/') !== -1) ext = '';
        return ext;
    }
    function urlToBlob(url, cb, forcePng, tryTimes = 0) {
        tryTimes++;
        if (tryTimes > 3) {