Extjs file upload request stays on waitMsg - php

Question

Through an ExtJs form I am uploading a file for processing in php (csv file in this matter).
The processing all works fine without errors or anything. And as far as I know, all of the other requirement for a proper response are met.
Return message = {success: true}
Response header Content/Type = text/html
Status = 200 OK
However ExtJs keeps showing my WaitMsg instead of going to my success of failure functions
Here is my form:
var form = new Ext.FormPanel({
id : 'mailinglist_form_import',
labelWidth : 210,
fileUpload : true,
border : false,
url : '/plugin/NewsletterManagement/mailinglist/import',
items : [{
xtype : 'fieldset',
width : 560,
border : false,
autoHeight : true,
labelWidth : 215,
defaultType : 'textfield',
defaults : {
width : 307,
labelStyle : 'font-weight: bold;'
},
items : [{
fieldLabel : t('Name') + ' *',
name : 'mli_name',
allowBlank : false
},{
xtype : 'textfield',
fieldLabel : t('File') + ' *',
name : 'file',
inputType : 'file'
}]
}]
});
The button:
var saveBtn = new Ext.Button({
text: t("Save"),
iconCls: 'pimcore_icon_save',
handler: function() {
form.getForm().submit({
waitMsg: t('Saving...'),
success: function () {
var tabpanel = Ext.getCmp("pimcore_panel_tabs");
Ext.MessageBox.alert (t('Message'),t('Data has been saved'));
form.getForm().reset();
grid.getStore().reload();
tabpanel.activate(gridTabId);
tabpanel.remove(tabId);
},
failure: function () {
Ext.MessageBox.alert (t('Message'),t('Saving data failed'));
}
});
}
});
The PHP file contains an echo:
echo "{'success': true}";
Any help is greatly appriciated.
Greetz,
XpertEase

Answer 1

Open console and see the error. If you dont's see both of your alerts -- then it's some error in code, in extjs side. Understand it, fix and then report back.