如何在CKeditor 4中添加上传图片时要发送的变量(id)

config.extraPlugins = 'customImageUpload';

CKEDITOR.plugins.add('customImageUpload', {
    init: function(editor) {
        editor.on('fileUploadRequest', function(evt) {
            var fileLoader = evt.data.fileLoader;
            var formData = new FormData();
            formData.append('file', fileLoader.file);
            formData.append('id', yourIdVariable); // 将要发送的变量（id）添加到请求中

            var xhr = new XMLHttpRequest();
            xhr.open('POST', 'your-upload-url', true);
            xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
            xhr.onload = function() {
                if (xhr.status === 200) {
                    var response = JSON.parse(xhr.responseText);
                    if (response.success) {
                        // 处理上传成功的逻辑
                    } else {
                        // 处理上传失败的逻辑
                    }
                } else {
                    // 处理请求失败的逻辑
                }
            };
            xhr.send(formData);
            evt.cancel();
        });
    }
});

config.toolbarGroups = [
    { name: 'document', groups: [ 'mode', 'document', 'doctools' ] },
    { name: 'clipboard', groups: [ 'clipboard', 'undo' ] },
    { name: 'editing', groups: [ 'find', 'selection', 'spellchecker' ] },
    { name: 'forms' },
    { name: 'basicstyles', groups: [ 'basicstyles', 'cleanup' ] },
    { name: 'paragraph', groups: [ 'list', 'indent', 'blocks', 'align', 'bidi' ] },
    { name: 'links' },
    { name: 'insert' },
    { name: 'styles' },
    { name: 'colors' },
    { name: 'tools' },
    { name: 'others' },
    { name: 'customImageUpload' } // 将自定义的上传图片插件添加到工具栏中
];