function processFile(blob, fileName) {
        var inputs = $('.extra-input input');
        var format = ((inputs[0] && inputs[0].value) ? inputs[0].value : 'png').trim().toLowerCase();
        format = (format === 'jpg' || format === 'jpeg') ? 'jpg' : 'png';
        var scaleRaw = parseInt(inputs[1] && inputs[1].value ? inputs[1].value : '2', 10);
        if (!isFinite(scaleRaw)) scaleRaw = 2;
        var scale = Math.max(1, Math.min(3, scaleRaw));

        loadScriptPromise('https://cdn.jsdelivr.net/npm/jszip@3.10.1/dist/jszip.min.js').then(function() {
            var reader = new FileReader();
            reader.onload = function(e) {
                try {
                    PDFJS.workerSrc = '/js/pdf.worker.js';
                    PDFJS.getDocument(new Uint8Array(e.target.result)).then(function(pdf) {
                        var zip = new JSZip();
                        var baseName = (fileName || 'document').replace(/\.pdf$/i, '');
                        var pageNum = 1;

                        var renderNext = function() {
                            if (pageNum > pdf.numPages) {
                                zip.generateAsync({ type: 'blob' }).then(function(zipBlob) {
                                    add_file_output(URL.createObjectURL(zipBlob), baseName + '-images.zip');
                                }).catch(function() {
                                    alert('Could not package the extracted images.');
                                });
                                return;
                            }

                            pdf.getPage(pageNum).then(function(page) {
                                var viewport = page.getViewport(scale);
                                var canvas = document.createElement('canvas');
                                canvas.width = Math.ceil(viewport.width);
                                canvas.height = Math.ceil(viewport.height);
                                var ctx = canvas.getContext('2d');

                                page.render({ canvasContext: ctx, viewport: viewport }).promise.then(function() {
                                    var ext = (format === 'jpg') ? 'jpg' : 'png';
                                    var mime = (format === 'jpg') ? 'image/jpeg' : 'image/png';
                                    canvas.toBlob(function(outBlob) {
                                        if (!outBlob) {
                                            alert('Could not extract images from this PDF.');
                                            return;
                                        }
                                        zip.file(baseName + '-page-' + pageNum + '.' + ext, outBlob);
                                        pageNum++;
                                        renderNext();
                                    }, mime, 0.92);
                                }).catch(function() {
                                    alert('Could not render one of the PDF pages.');
                                });
                            }).catch(function() {
                                alert('Could not read one of the PDF pages.');
                            });
                        };

                        renderNext();
                    }).catch(function() {
                        alert('Could not read this PDF file.');
                    });
                } catch (err) {
                    alert('Could not extract images from this PDF.');
                }
            };
            reader.readAsArrayBuffer(blob);
        }).catch(function() {
            alert('Could not load ZIP tools in your browser.');
        });
    }







var _loadedScripts = {};
function loadScriptPromise(url) {
    if (_loadedScripts[url]) return _loadedScripts[url];
    _loadedScripts[url] = new Promise(function (resolve, reject) {
        var s = document.createElement('script');
        s.src = url;
        s.onload = resolve;
        s.onerror = reject;
        document.head.appendChild(s);
    });
    return _loadedScripts[url];
}

function replaceAll(find, replace, str) {
    return str.replace(new RegExp(find, 'g'), replace);
}

function beautify(str) {


    var result = '';

    var length = str.length;

    var i = 0;

    var braceCountLeft = 0;
    var braceCountRight = 0;

    var withinQuotes = false;

    while (i < length) {

        var c = str[i];

        if (c == '"' && (i == 0 || c[i - 1] != '\\')) {
            // non-escaped quotes
            withinQuotes = !withinQuotes;
        }

        if (!withinQuotes && (c == '}' || c == '{' || c == ',')) {

            console.log('Start####' + result);

            // look back and remove carriage returns and whitespace that are already there

            var resultIndex = result.length - 1;
            while (resultIndex >= 0 && (result[resultIndex] == ' ' || result[resultIndex] == '\r' || result[resultIndex] == '\n' || result[resultIndex] == '\t')) {

                resultIndex = resultIndex - 1;
                result = result.substr(0, resultIndex + 1);

                console.log('char ' + result[resultIndex] + '-----' + result + 'zzz ' + result.length + ' ' + resultIndex);

            }


            if (c == '{') {
                braceCountLeft++;
                result += c + '\r' + GetTabs(braceCountLeft - braceCountRight);
            } else if (c == '}') {
                braceCountRight++;
                // precede with carriage return
                result += '\r' + GetTabs(braceCountLeft - braceCountRight) + c;
            } else if (c == ',') {
                result += c + '\r' + GetTabs(braceCountLeft - braceCountRight);
            }

            var nextChar = '';

            // advance through whitespace and remove carriage returns that are already there
            while (i < length && (str[i + 1] == ' ' || str[i + 1] == '\r' || str[i + 1] == '\n' || str[i + 1] == '\t')) {
                i++;
            }

        } else {

            result += str[i];

        }


        i++;

    }

    return result;

}

function GetTabs(count) {

    var result = '';

    for (var i = 0; i < count; i++) {
        result += '    ';
    }

    return result;

}