流れ
・http socket でフォームに送るデータを整形
・$_POST で受け取ったデータを $this->data に変換
・フォームに送る。

function uptest()
{
    require_once 'HTTP/Request.php';
    $url = "/tellers/upload/";

    $req = new HTTP_Request($url);
    $req->setMethod(HTTP_REQUEST_METHOD_POST);
    $req->addHeader("Content-Type", "multi-part/form-data");
    
    //foreign_key と アップしたいリモートファイルを指定
    $req->addPostData("id",'1537');
    $req->addFile("attach_file",WWW_ROOT.'files/image/1067.jpg');
    $req->addPostData("_method", "POST");
    
    $res = $req->sendRequest(); 
    $res = $req->getResponseBody();
    
    //IP判断でデバッグでなく、全てのユーザーが見れるようにデバッグ 2 にしておく。じゃないとデバッグが見れない。
    pr($res);
    
    $this->autoRender = false;
}

//データを整形してみる
function goal()
{
    //pr($_POST);
    //pr($_FILES);
    $this->data['Teller']['id'] = $_POST['id'];
    
    $this->data['Attachment'][0]['model'] = 'Teller';
    $this->data['Attachment'][0]['group'] = '';
    $this->data['Attachment'][0]['alternative'] = 'Teller';
    $this->data['Attachment'][0]['file'] = $_FILES['attach_file'];
    
    pr($this->data);
    
    $this->autoRender = false;
}

function upload()
{
    $this->set('title_for_layout','画像をアップロード');
    
    //画像アップロードフォームの一番上にこれを追加。
    if($_POST){
        $this->data['Teller']['id'] = $_POST['id'];
    
        $this->data['Attachment'][0]['model'] = 'Teller';
        $this->data['Attachment'][0]['group'] = '';
        $this->data['Attachment'][0]['alternative'] = 'Teller';
        $this->data['Attachment'][0]['file'] = $_FILES['attach_file'];
    }
    
    if($this->data){
        
        if(!empty($this->data['Attachment'][0]['file']['name'])){
            
            
            if ($this->Teller->saveAll($this->data)) {  
                $this->redirect('/tellers/upload/');
                echo '保存完了';
            } else {		
                $this->Teller->invalidate('AttachmentError');
            }
        } else {
            $this->Teller->invalidate('AttachmentError'); 
        }
    }
    
    
    $res = $this->Teller->find('profile',array('conditions' => array('id' => t('id')))); 
    
    
    $this->set(
        compact(
            'res'
        )
    );
}