解决ueditor跨域上传文件失败的问题,

修改 ueditor.all.js第24507行的domUtils方法 https://gitee.com/cnbattle/codes/qlka2rozmutdf413n9c6j74

  domUtils.on(input, 'change', function () {
                    if (!input.value) return;
                    var loadingId = 'loading_' + (+new Date()).toString(36);
                    var params = utils.serializeParam(me.queryCommandValue('serverparam')) || '';

                    var imageActionUrl = me.getActionUrl(me.getOpt('imageActionName'));
                    var allowFiles = me.getOpt('imageAllowFiles');

                    me.focus();
                    me.execCommand('inserthtml', '<img class="loadingclass" id="' + loadingId + '" src="' + me.options.themePath + me.options.theme + '/images/spacer.gif" title="' + (me.getLang('simpleupload.loading') || '') + '" >');

                    function callback(responseData) {
                        try {

                            if (responseData.state == 'SUCCESS' && responseData.url) {
                                loader = me.document.getElementById(loadingId);
                                loader.setAttribute('src', responseData.url);
                                loader.setAttribute('_src', responseData.url);
                                loader.setAttribute('title', responseData.title || '');
                                loader.setAttribute('alt', responseData.original || '');
                                loader.removeAttribute('id');
                                domUtils.removeClasses(loader, 'loadingclass');
                            } else {
                                showErrorLoader && showErrorLoader(responseData.state);
                            }
                        } catch (er) {
                            showErrorLoader && showErrorLoader(me.getLang('simpleupload.loadError'));
                        }
                        form.reset();
                        domUtils.un(iframe, 'load', callback);
                    }

                    function showErrorLoader(title) {
                        if (loadingId) {
                            var loader = me.document.getElementById(loadingId);
                            loader && domUtils.remove(loader);
                            me.fireEvent('showmessage', {
                                'id': loadingId,
                                'content': title,
                                'type': 'error',
                                'timeout': 4000
                            });
                        }
                    }

                    /* 判断后端配置是否没有加载成功 */
                    if (!me.getOpt('imageActionName')) {
                        errorHandler(me.getLang('autoupload.errorLoadConfig'));
                        return;
                    }
                    // 判断文件格式是否错误
                    var filename = input.value,
                        fileext = filename ? filename.substr(filename.lastIndexOf('.')) : '';
                    if (!fileext || (allowFiles && (allowFiles.join('') + '.').indexOf(fileext.toLowerCase() + '.') == -1)) {
                        showErrorLoader(me.getLang('simpleupload.exceedTypeError'));
                        return;
                    }

                    var fileForm = new FormData();
                    fileForm.append(me.options.imageFieldName, input.files[0]);

                    var oReq = new XMLHttpRequest();
                    oReq.open("POST", imageActionUrl, true);
                    oReq.send(fileForm);   // 使用XMLHttpRequest的send()把数据发送出去

                    oReq.onreadystatechange = function (responseText) {//服务器返回值的处理函数，此处使用匿名函数进行实现
                        if (oReq.readyState == 4 && oReq.status == 200) {//
                            var responseData = eval("(" + oReq.responseText + ")");
                            callback(responseData);
                        }
                    };
                });