如何在php中打斷curl上傳？

Question

我創建了一個php腳本來處理上傳，我試圖在出現錯誤時立即返回錯誤（例如文件已經存在）。

不幸的是，根據我的測試，雖然我立即返回，捲曲將繼續上傳整個文件，直到它結束：

public function uploadFile($filename) { 
    Log::info('Uploading file...' . $filename); 
    register_shutdown_function(array(&$this, "streamInterrupted")); 
    $this->bytes_transferred=0; 
    set_time_limit(0); 
    ignore_user_abort(false);  
    $path = Config::get('agent.files_root'). '/' . $filename; 
    if (file_exists($path)) { 
     /* 
     * yes, I know, this needs to be worked on 
     * as it would allow a malicious user to find out 
     * if a file exists on the server... 
     */   
     Log::error('Oops, the file already exists! ' . $filename); 
     return Response::json(array(
      'error' => true, 
      'message' => 'That file already exists.'), 
      400 
     ); 
    } 
    $putdata = fopen("php://input", "r"); 
    /* Open a file for writing */ 
    $fp = fopen($path, "w"); 

    /* Read the data 1 KB at a time 
     and write to the file */ 
    while ($data = fread($putdata, 1024)) 
     fwrite($fp, $data); 

    /* Close the streams */ 
    fclose($fp); 
    fclose($putdata); 
    Log::info('Yay! The file was uploaded successfully! ' . $filename); 
    return Response::json(array(
      'error' => false, 
      'message' => 'The file was uploaded successfully!'), 
      400 
     ); 
} 

所以，你可以看到，之前我甚至開始讀取PUT數據，我驗證文件是否存在並立即返回一個錯誤（順便說一下，我可以看到測試正在成功觸發），但是直到它完成所有數據的推送，curl纔會放棄。

有沒有辦法讓我乾淨地打斷它？我相當肯定我可以死（但）然後我不能將狀態碼和錯誤消息推回客戶端...

有什麼想法？

謝謝 路易斯

Answer 1

這裏是你如何能中斷上傳客戶端連接：

// return bad request immediately... 
header('HTTP/1.0 400 Bad Request'); 
// generate error message 
$message=json_encode(array(
        'error'=>true, 
        'message'=>'That file already exists.')); 
return header('Content-length: ' . strlen($message)) . $message; 

最主要的是報告內容長度所以，如果你只是想殺死連接，您可以：

header('Content-length: 0'); 

但是，因爲我想回的消息，我確信內容長度是消息的大小和後回到住處呃推頭。