Cakephp 2，响应正文内容类型不起作用

Question

$this->autoRender = false;
$this->response->header("HTTP/1.1 200 OK");
$this->response->header("Pragma: public");
$this->response->header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
$this->response->header("Cache-Control: private", false);

//$this->response->header("Content-type: image/png"); //tried also
$this->response->type('jpg');

$this->response->body(readfile($file));

return $this->response;

总是returns内容类型：text/html；字符集=UTF-8.

谢谢

Answer 1

$this->response->body(readfile($file));

将此行更改为

$this->response->body(file_get_contents($file));

并且有效。

我知道它是性能更高的 readfile，但目前应该可以。

可能是 readfile 的某些内容与 enconding 中断了。