Question

我正试图找到一种方法来阻止活跃的PHP Curl下载。我从远程服务器下载大文件，有时我想在启动后取消下载。我已尝试在CURLOPT_PROGRESSFUNCTION内返回false，但这不起作用。我也尝试删除正在下载的文件，但也没有用（web stats显示下载仍在继续）。

以下代码通过快速ajax调用触发：

$ch = curl_init( $file->url );
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_NOPROGRESS, false );
curl_setopt($ch, CURLOPT_FILE, $targetFile); //save the file to here
curl_setopt( $ch, CURLOPT_PROGRESSFUNCTION, function($resource, $download_size, $downloaded_size, $upload_size, $uploaded_size) use ($download_id) {
  if ( $download_size == 0 ) {
      $progress = 0;
  } else {
      $progress = round( $downloaded_size * 100 / $download_size );
  }

  // if download complete trigger completed function
  if($progress == 100) {
     self::DownloadCompleted($download_id);
  }

});
$curl = curl_exec($ch);

Answer 1

解决方案是在CURLOPT_PROGRESSFUNCTION函数中返回一个非零值，根据评论中的drew010。

为了完成这项工作，我在函数中添加了一个检查以查看文件是否存在，如果该函数返回1并且中止。我想在取消下载时在目录中创建一个与下载ID同名的文件。它适用于我。

$ch = curl_init( $file->url );
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_NOPROGRESS, false );
curl_setopt($ch, CURLOPT_FILE, $targetFile); //save the file to here
curl_setopt( $ch, CURLOPT_PROGRESSFUNCTION, function($resource, $download_size, $downloaded_size, $upload_size, $uploaded_size) use ($download_id) {
  
  //if the file exists, the download is aborted
  if(file_exists('path/to/directory/cancel.'.$download_id)) {
    Self::CleanupCancelledDownload; //function to clean up the partially downloaded file, etc.
    return 1; //returning a non-zero value cancels the CURL download.
  }
});
$curl = curl_exec($ch);

停止PHP卷曲下载

1 个答案: