Website becomes unusable while downloading file served by PHP script


I'm running IIS 8.0 and have a script that serves various downloads when someone clicks on a download link. However I'm running into an issue where as long as a user is downloading something the website is completely unresponsive until that download completes. Below is the code for the download script. This script is being opened in a new window.

$extension = fileexten($filename); if(($filename!= false)&&($fakename!=false&& @fopen($filename,'r')==true)){ $mime = contenttype($extension); set_time_limit(0); header('Pragma: public'); header('Expires: 0'); header("Content-Type:".$mime); header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); header('Cache-Control: private', false); header('Content-Disposition: attachment;filename='.$fakename.'.'.$extension); header("Content-Transfer-Encoding: binary"); if (ob_get_length() > 0) { ob_end_clean(); } flush(); readfile($filename); } else{ $error = "<h3>We could not find this file</h3>";} // If the filename or fake filename could not be retrieved. }


Close the session before outputting the file.

session_write_close(); readfile($filename);

The session can only be opened by one PHP process at a time, and any other requests that issue a session_start() command will block while waiting for access to the session data file.


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