从AWS S3上传获取json

Question

我将jQuery File Upload与Tim Peterson's Amazon AWS S3 upload handler结合使用，将文件上传到S3。我的目标是获取AWS存储的文件名。如果我上传foo.mov十次，S3会将其命名为foo.mov，foo（1）.mov，foo（2）.mov等等。成功上传后，我在控制台中从这些方法获得JSON字符串的响应：

protected function generate_response($content, $print_response = true) {
    if ($print_response) {
        $json = json_encode($content);
        $redirect = isset($_REQUEST['redirect']) ?
            stripslashes($_REQUEST['redirect']) : null;
        if ($redirect) {
            $this->header('Location: '.sprintf($redirect, rawurlencode($json)));
            return;
        }
        $this->head();
        if ($this->get_server_var('HTTP_CONTENT_RANGE')) {
            $files = isset($content[$this->options['param_name']]) ?
                $content[$this->options['param_name']] : null;
            if ($files && is_array($files) && is_object($files[0]) && $files[0]->size) {
                $this->header('Range: 0-'.(
                    $this->fix_integer_overflow(intval($files[0]->size)) - 1
                ));
            }
        }
        $this->body($json);
    }
    return $content;
}



public function post($print_response = true) {
    if (isset($_REQUEST['_method']) && $_REQUEST['_method'] === 'DELETE') {
        return $this->delete($print_response);
    }
    $upload = isset($_FILES[$this->options['param_name']]) ?
        $_FILES[$this->options['param_name']] : null;
    // Parse the Content-Disposition header, if available:
    $file_name = $this->get_server_var('HTTP_CONTENT_DISPOSITION') ?
        rawurldecode(preg_replace(
            '/(^[^"]+")|("$)/',
            '',
            $this->get_server_var('HTTP_CONTENT_DISPOSITION')
        )) : null;
    // Parse the Content-Range header, which has the following form:
    // Content-Range: bytes 0-524287/2000000
    $content_range = $this->get_server_var('HTTP_CONTENT_RANGE') ?
        preg_split('/[^0-9]+/', $this->get_server_var('HTTP_CONTENT_RANGE')) : null;
    $size =  $content_range ? $content_range[3] : null;
    $files = array();
    if ($upload && is_array($upload['tmp_name'])) {
        // param_name is an array identifier like "files[]",
        // $_FILES is a multi-dimensional array:
        foreach ($upload['tmp_name'] as $index => $value) {
            $files[] = $this->handle_file_upload(
                $upload['tmp_name'][$index],
                $file_name ? $file_name : $upload['name'][$index],
                $size ? $size : $upload['size'][$index],
                $upload['type'][$index],
                $upload['error'][$index],
                $index,
                $content_range
            );
        }
    } else {
        if( isset($_POST['fileSourceChooser']) && $_POST['fileSourceChooser']=='dropbox' ){

            //http://justinvincent.com/page/1087/how-to-get-the-mime-type-of-a-remote-file-in-php-with-redirects
            function get_url_mime_type($url){
                $ch = curl_init($url);
                curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
                curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
                curl_setopt($ch, CURLOPT_HEADER, 1);
                curl_setopt($ch, CURLOPT_NOBODY, 1);
                curl_exec($ch);
                return curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
            }
                $upload=$_POST['files']; ////if just a regular post
                $upload['parse_url']=parse_url($upload['link']);
                $upload['url']='https://dl.dropboxusercontent.com'.$upload['parse_url']['path'];
                    $files[] = $this->handle_file_upload(
                        $upload['url'],
                        $file_name ? $file_name : $upload['name'],
                        $size ? $size : $upload['bytes'],
                        get_url_mime_type($upload['url']), 
                        "", 
                        null, null,
                        $content_range
                    );  

                    file_put_contents(
                        $this->options['upload_dir'].'thumbnail/'.$upload['name'],
                        fopen($upload['thumbnail'], 'r'),
                        FILE_APPEND //$append_file ? FILE_APPEND : 0
                    );                        
        }
        else{
            // param_name is a single object identifier like "file",
            // $_FILES is a one-dimensional array:
            $files[] = $this->handle_file_upload(
                isset($upload['tmp_name']) ? $upload['tmp_name'] : null,
                $file_name ? $file_name : (isset($upload['name']) ?
                        $upload['name'] : null),
                $size ? $size : (isset($upload['size']) ?
                        $upload['size'] : $this->get_server_var('CONTENT_LENGTH')),
                isset($upload['type']) ?
                        $upload['type'] : $this->get_server_var('CONTENT_TYPE'),
                isset($upload['error']) ? $upload['error'] : null,
                null,
                $content_range
            );                
        }
    }

    $AWSresponse = $this->generate_response(
        array($this->options['param_name'] => $files),
        $print_response
    );

    return $AWSresponse;
}

该回复如下：

{"files":[{"name":"foo (51).mov","size":1202952,"type":"video\/quicktime","url":"https:\/\/me.s3.amazonaws.com\/bucket\/foo%20%2851%29.mov","deleteUrl":"https:\/\/myurl.com\/folder\/path\/?file=foo%20%2851%29.mov&_method=DELETE","deleteType":"POST"}]}

如何从UploadHandler类外部访问此信息？我以为我可以尝试在post方法中设置一个变量（名为AWSresponse），该变量设置为此值，但这不起作用。

该类由此执行：

require('UploadHandler.php');
$upload_handler = new UploadHandler();

我希望能够做这样的事情（这不起作用）：

require('UploadHandler.php');
$upload_handler = new UploadHandler();
$response = $upload_handler::$AWSresponse;