Question

我在Yii框架控制器中编写了以下代码。此代码在我的localhost上正常工作，但在服务器上无效。

有人可以告诉我代码的错误

以下是我在控制器中编写的代码

public function downloadFile($dir,$file,$extensions=[]){
    if(is_dir($dir)){
        $path = $dir.$file;
        if(is_file($path)){
            $fileinfo=pathinfo($path);
            $extension=$fileinfo["extension"];
            if(is_array($extensions)){
                foreach($extensions as $e){
                    if($e===$extension){
                        $size = filesize($path);
                        header('Content-Type: application/octet-stream');
                        header('Content-Length: '.$size);
                        header('Content-Disposition: attachment; filename='.$file);
                        header('Content-Transfer-Encoding: binary');
                        readfile($path);
                        return true;
                    }
                }
            }
        }else{
            echo"error";
        }
    }
}

public function actionDownload(){   
    if(Yii::$app->request->get('file')){        
        $this->downloadFile("media/offer/",Html::encode($_GET["file"]),["jpg","png"]);
    }
}

Answer 1

你标记了yii2，但它不是yii2，它是纯粹的PHP。

如何使用框架来做到这一点？

public function actionFile($filename)
{
   $storagePath = Yii::getAlias('@app/files');

   // check filename for allowed chars (do not allow ../ to avoid security issue: downloading arbitrary files)
   if (!preg_match('/^[a-z0-9]+\.[a-z0-9]+$/i', $filename) || !is_file("$storagePath/$filename")) {
      throw new \yii\web\NotFoundHttpException('The file does not exists.');
   }
   return Yii::$app->response->sendFile("$storagePath/$filename", $filename);
}

Yii2 - sendFile()

^将storagePath更改为您的文件目录。

就是这样，没有更多事情要做。

Answer 2

用你的替换此功能，

public function downloadFile($dir,$file,$extensions=[]){
    if(is_dir($dir)){
        $path = $dir.$file;
        if(is_file($path)){
            $fileinfo=pathinfo($path);
            $extension=$fileinfo["extension"];
            if(is_array($extensions) && in_array($extension, $extensions)){

                header('Content-Description: File Transfer');
                header('Content-Type: application/octet-stream');
                header('Content-Disposition: attachment; filename='.basename($path));
                header('Content-Transfer-Encoding: binary');
                header('Expires: 0');
                header('Cache-Control: must-revalidate');
                header('Pragma: public');
                header('Content-Length: ' . filesize($path));
                ob_clean();
                flush();
                readfile($path);
                exit;

            }
        }else{
            echo"error";
        }
    }
}

我刚跟这个叫

downloadFile("/var/www/html/", "test.php", ['php']);

它对我有用。

使用PHP在服务器上下载Image时出错

2 个答案: