Upload Image using CKeditor - Rails

Hello Guys,

   Today i've configure CKeditor (https://github.com/galetahub/ckeditor) to my Rails application and i found there is no upload button along with Image insert dialog.
So i've modified the ckeditor/config.js to below and it then show new tab called 'Upload' in Image insert dialog.

See. config.js

CKEDITOR.editorConfig = function (config) {

  // ... other configuration ...
  config.language = 'en';
  config.toolbar_regular = [
    { name: 'document', items: ['Source'] },
    { name: 'clipboard', groups: [ 'clipboard', 'undo' ], items: [ 'Cut', 'Copy', 'Paste', 'PasteText', 'PasteFromWord', '-', 'Undo', 'Redo' ] },
    { name: 'basicstyles', groups: [ 'basicstyles', 'cleanup' ], items: [ 'Bold', 'Italic', 'Underline', 'Strike', 'Subscript', 'Superscript', '-', 'RemoveFormat' ] },
    '/',
    { name: 'paragraph', groups: [ 'list', 'indent', 'blocks', 'align', 'bidi' ], items: [ 'NumberedList', 'BulletedList', '-', 'Outdent', 'Indent', '-', 'Blockquote', 'CreateDiv', '-', 'JustifyLeft', 'JustifyCenter', 'JustifyRight', 'JustifyBlock' ] },
    { name: 'links', items: [ 'Link', 'Unlink', 'Anchor' ] },
    { name: 'insert', items: ['Table', 'Image', 'HorizontalRule', 'SpecialChar' ] },
    '/',
    { name: 'styles', items: [ 'Styles', 'Format', 'Font', 'FontSize' ] },
    { name: 'colors', items: [ 'TextColor', 'BGColor' ] },
    { name: 'tools', items: [ 'Maximize'] },
    { name: 'plugins', items: ['CodeSnippet', 'Cite'] }
  ];
  config.toolbar_lite = config.toolbar_regular.concat({ name: "lite", items: ["lite_ToggleShow", "lite_AcceptAll", "lite_RejectAll"] });
    config.toolbar = 'regular';
  config.allowedContent = true;
   /* Filebrowser routes */
  // The location of an external file browser, that should be launched when "Browse Server" button is pressed.
  config.filebrowserBrowseUrl = "/ckeditor/attachment_files";
  // The location of an external file browser, that should be launched when "Browse Server" button is pressed in the Flash dialog.
  config.filebrowserFlashBrowseUrl = "/ckeditor/attachment_files";
  // The location of a script that handles file uploads in the Flash dialog.
  config.filebrowserFlashUploadUrl = "/ckeditor/attachment_files";
  // The location of an external file browser, that should be launched when "Browse Server" button is pressed in the Link tab of Image dialog.
  config.filebrowserImageBrowseLinkUrl = "/ckeditor/pictures";
  // The location of an external file browser, that should be launched when "Browse Server" button is pressed in the Image dialog.
  config.filebrowserImageBrowseUrl = "/ckeditor/pictures";
  // The location of a script that handles file uploads in the Image dialog.
  config.filebrowserImageUploadUrl = "/ckeditor/pictures";
  // The location of a script that handles file uploads.
  config.filebrowserUploadUrl = "/ckeditor/attachment_files";
  // Rails CSRF token
  config.filebrowserParams = function(){
    var csrf_token, csrf_param, meta,
        metas = document.getElementsByTagName('meta'),
        params = new Object();
    for ( var i = 0 ; i < metas.length ; i++ ){
      meta = metas[i];
      switch(meta.name) {
        case "csrf-token":
          csrf_token = meta.content;
          break;
        case "csrf-param":
          csrf_param = meta.content;
          break;
        default:
          continue;
      }
    }
    if (csrf_param !== undefined && csrf_token !== undefined) {
      params[csrf_param] = csrf_token;
    }
    return params;
  };
  config.addQueryString = function( url, params ){
    var queryString = [];
    if ( !params ) {
      return url;
    } else {
      for ( var i in params )
        queryString.push( i + "=" + encodeURIComponent( params[ i ] ) );
    }
    return url + ( ( url.indexOf( "?" ) != -1 ) ? "&" : "?" ) + queryString.join( "&" );
  };
  // Integrate Rails CSRF token into file upload dialogs (link, image, attachment and flash)
  CKEDITOR.on( 'dialogDefinition', function( ev ){
    // Take the dialog name and its definition from the event data.
    var dialogName = ev.data.name;
    var dialogDefinition = ev.data.definition;
    var content, upload;
    if (CKEDITOR.tools.indexOf(['link', 'image', 'attachment', 'flash'], dialogName) > -1) {
      content = (dialogDefinition.getContents('Upload') || dialogDefinition.getContents('upload'));
      upload = (content == null ? null : content.get('upload'));
      if (upload && upload.filebrowser && upload.filebrowser['params'] === undefined) {
        upload.filebrowser['params'] = config.filebrowserParams();
        upload.action = config.addQueryString(upload.action, upload.filebrowser['params']);
      }
    }
  });
};

Hope this article helps you.