/**
* Process Download
*
* Validate download and send file to user
* http://www.richnetapps.com/php-download-script-with-resume-option/
*
* @since 1.0
*/
function dedo_download_process()
{
global $dedo_options;
// Get download id
if (isset($_GET[$dedo_options['download_url']])) {
// Ensure only positive int, else could be fishy!
$download_id = absint($_GET[$dedo_options['download_url']]);
// Check valid download
if (!dedo_download_valid($download_id)) {
do_action('ddownload_download_invalid', $download_id);
wp_die(__('Invalid download.', 'delightful-downloads'));
}
// Check blocked user agents
if (!dedo_download_blocked($_SERVER['HTTP_USER_AGENT'])) {
do_action('ddownload_download_blocked', $download_id);
wp_die(__('You are blocked from downloading this file!', 'delightful-downloads'));
}
// Get file meta
$download_url = get_post_meta($download_id, '_dedo_file_url', true);
$options = get_post_meta($download_id, '_dedo_file_options', true);
// Check for members only
if (!dedo_download_permission($options)) {
do_action('ddownload_download_permission', $download_id);
// Get redirect location
$location = isset($options['members_only_redirect']) ? $options['members_only_redirect'] : $dedo_options['members_only_redirect'];
// Try to redirect
if ($location = get_permalink($location)) {
wp_redirect($location);
exit;
} else {
// Invalid page provided, show error message
wp_die(__('Please login to download this file!', 'delightful-downloads'));
}
}
// Password protected
if (post_password_required($download_id)) {
wp_die(get_the_password_form($download_id), __('Password Required', 'delightful-downloads'));
}
// Empty file urls not allowed
if ('' === $download_url) {
wp_die(__('You must attach a file to this download.', 'delightful-downloads'));
}
// Stop page caching. Cause conflicts with WP Super Cache
define('DONOTCACHEPAGE', true);
// Disable php notices, can cause corrupt downloads
@ini_set('display_errors', 0);
// Disable compression
if (function_exists('apache_setenv')) {
@apache_setenv('no-gzip', 1);
}
@ini_set('zlib.output_compression', 'Off');
// Close sessions, which can sometimes cause buffering errors??
@session_write_close();
/**
* Output Buffering
*
* The majority of servers work when clearing output buffering.
* If you get corrupt or blank downloads try the following:
*
* Disable by adding the following, to your theme's functions.php file:
*
* add_filter( 'dedo_clear_output_buffers', '__return_false' );
*
*/
if (apply_filters('dedo_clear_output_buffers', true)) {
do {
@ob_end_clean();
} while (ob_get_level() > 0);
}
// Disable max_execution_time
set_time_limit(0);
// Hook before download starts
do_action('ddownload_download_before', $download_id);
// Open in browser
$open_browser = isset($options['open_browser']) ? $options['open_browser'] : $dedo_options['open_browser'];
if ($open_browser) {
header("Location: {$download_url}");
exit;
}
// Convert to path
if ($download_path = dedo_get_abs_path($download_url)) {
// Try to open file, else display server error
if (!($file = @fopen($download_path, 'rb'))) {
// Server error
wp_die(__('Server error, file cannot be opened!', 'delightful-downloads'));
}
// Set headers
nocache_headers();
header("X-Robots-Tag: noindex, nofollow", true);
header("Content-Type: " . dedo_download_mime($download_path));
header("Content-Description: File Transfer");
header("Content-Disposition: attachment; filename=\"" . basename($download_path) . "\";");
header("Content-Transfer-Encoding: binary");
header("Content-Length: " . @filesize($download_path));
// filesize causes blank downloads on Windows servers
// Output file in chuncks
while (!feof($file)) {
print fread($file, 1024 * 1024);
flush();
// Check conection, if lost close file and end loop
if (connection_status() != 0) {
fclose($file);
exit;
}
}
// Reached end of file, close it. Job done!
fclose($file);
// Hook when download complete
do_action('ddownload_download_complete', $download_id);
// Done! Exit
exit;
} else {
// No disoverable path, redirect to file
header("Location: {$download_url}");
exit;
}
}
}
/**
* Get File Status
*
* Checks whether a file is accessible, either locally or remotely.
*
* @since 1.5
*
* @param string $url File path/url of filename.
* @return boolean/array.
*/
function dedo_get_file_status($url)
{
// Check locally
if ($file = dedo_get_abs_path($url)) {
$type = 'local';
$size = @filesize($file);
} else {
$response = @get_headers($url, 1);
if (false === $response || 'HTTP/1.1 404 Not Found' == $response[0] || 'HTTP/1.1 403 Forbidden' == $response[0] || !isset($response['Content-Length'])) {
return false;
} else {
$type = 'remote';
$size = $response['Content-Length'];
}
}
return array('type' => $type, 'size' => $size);
}