以 files：选择 事件描述。你得到 Backbone.Collection 用户在 evt.data.files 中选择的.cksource.com / ckfinder3 /＃！/ api / CKFinder.Models.File>文件。

Taking example from the files:choose event description. You get Backbone.Collection of files chosen by the user in evt.data.files.

棘手的部分是从 ImageInfo 服务器（使用 命令：发送 请求）因为它需要使用promises处理异步代码。

The tricky part is to obtain image dimensions from ImageInfo server (using the command:send request) since it requires to process asynchronous code with promises.

假设您只允许上传图片，示例代码如下：

Assuming that you only allow Images to be uploaded, example code is below:

// Listen to event.
finder.on( 'files:choose', function( evt ) {
    // Iterate over the files collection.
    evt.data.files.forEach( function( file ) {
        // Send command to the server.
        finder.request( 'command:send', {
            name: 'ImageInfo',
            folder: file.get( 'folder' ),
            params: { fileName: file.get( 'name' ) }
        } ).done( function( response ) {
            // Process server response.
            if ( response.error ) {
                // Some error handling.
                return;
            }

            // Log image data:
            console.log( '-------------------' );
            console.log( 'Name:', file.get( 'name' ) );
            console.log( 'URL:', file.getUrl() );
            console.log( 'Dimensions:', response.width + 'x' + response.height );
            console.log( 'Size:', response.size + 'B' );
        } );
    } );
} )

如果您使用任何远程后端，例如Dropbox，您可能需要使用 file：getUrl 请求获取文件的URL。

If you are using any remote backend such us Dropbox you might need to use the file:getUrl request to obtain the file's URL.