使用 Content-Length header 通过 PHP 脚本从 FTP 服务器下载文件到浏览器,而不将文件存储在 Web 服务器上
Download file via PHP script from FTP server to browser with Content-Length header without storing the file on the web server
我使用此代码从 ftp:
下载文件到内存
public static function getFtpFileContents($conn_id , $file)
{
ob_start();
$result = ftp_get($conn_id, "php://output", $file, FTP_BINARY);
$data = ob_get_contents();
ob_end_clean();
if ($resul)
return $data;
return null;
}
如何让它直接将文件发送给用户(浏览器)而不保存到磁盘并且不重定向到 ftp 服务器?
只需删除输出缓冲(ob_start()
和其他)。
只用这个:
ftp_get($conn_id, "php://output", $file, FTP_BINARY);
虽然如果你想添加 Content-Length
header,你必须先使用 ftp_size
:
查询文件大小
$conn_id = ftp_connect("ftp.example.com");
ftp_login($conn_id, "username", "password");
ftp_pasv($conn_id, true);
$file_path = "remote/path/file.zip";
$size = ftp_size($conn_id, $file_path);
header("Content-Type: application/octet-stream");
header("Content-Disposition: attachment; filename=" . basename($file_path));
header("Content-Length: $size");
ftp_get($conn_id, "php://output", $file_path, FTP_BINARY);
(添加错误处理)
有关更广泛的背景,请参阅:
List and download clicked file from FTP
public static function getFtpFileContentsWithSize($conn_id , $file)
{
ob_start();
$result = ftp_get($conn_id, "php://output", $file, FTP_BINARY);
$data = ob_get_contents();
$datasize = ob_get_length( );
ob_end_clean();
if ($result)
return array( 'data' => $data, 'size' => $datasize );
return null;
}
$mapfile = SUPERFTP::getFtpFileContentsWithSize($ftpconn, $curmap['filename']);
ftp_close($ftpconn);
if (!$mapfile)
{
$viewParams['OutContext'] = "Error. File not found." ;
}
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.$curmap['filename']);
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . $mapfile['size']);
echo $mapfile['data'];
exit( );
此代码有效。谢谢大家
我使用此代码从 ftp:
下载文件到内存public static function getFtpFileContents($conn_id , $file)
{
ob_start();
$result = ftp_get($conn_id, "php://output", $file, FTP_BINARY);
$data = ob_get_contents();
ob_end_clean();
if ($resul)
return $data;
return null;
}
如何让它直接将文件发送给用户(浏览器)而不保存到磁盘并且不重定向到 ftp 服务器?
只需删除输出缓冲(ob_start()
和其他)。
只用这个:
ftp_get($conn_id, "php://output", $file, FTP_BINARY);
虽然如果你想添加 Content-Length
header,你必须先使用 ftp_size
:
$conn_id = ftp_connect("ftp.example.com");
ftp_login($conn_id, "username", "password");
ftp_pasv($conn_id, true);
$file_path = "remote/path/file.zip";
$size = ftp_size($conn_id, $file_path);
header("Content-Type: application/octet-stream");
header("Content-Disposition: attachment; filename=" . basename($file_path));
header("Content-Length: $size");
ftp_get($conn_id, "php://output", $file_path, FTP_BINARY);
(添加错误处理)
有关更广泛的背景,请参阅:
List and download clicked file from FTP
public static function getFtpFileContentsWithSize($conn_id , $file)
{
ob_start();
$result = ftp_get($conn_id, "php://output", $file, FTP_BINARY);
$data = ob_get_contents();
$datasize = ob_get_length( );
ob_end_clean();
if ($result)
return array( 'data' => $data, 'size' => $datasize );
return null;
}
$mapfile = SUPERFTP::getFtpFileContentsWithSize($ftpconn, $curmap['filename']);
ftp_close($ftpconn);
if (!$mapfile)
{
$viewParams['OutContext'] = "Error. File not found." ;
}
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.$curmap['filename']);
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . $mapfile['size']);
echo $mapfile['data'];
exit( );
此代码有效。谢谢大家