/**
* Return a JSON response containing the response provided.
*
* @param string $status Status of the response, typically 'success' or 'failure'.
* @param string $responsetext On success, the email address of the user,
* otherwise a reason for the failure.
* @return void Outputs the JSON and terminates the script.
*/
function badges_send_response($status, $responsetext)
{
$out = new stdClass();
$out->status = $status;
if ($status == 'success') {
$out->email = $responsetext;
} else {
$out->reason = $responsetext;
send_header_404();
}
echo json_encode($out);
exit;
}
/**
* Serves scorm content, introduction images and packages. Implements needed access control ;-)
*
* @package mod_scorm
* @category files
* @param stdClass $course course object
* @param stdClass $cm course module object
* @param stdClass $context context object
* @param string $filearea file area
* @param array $args extra arguments
* @param bool $forcedownload whether or not force download
* @param array $options additional options affecting the file serving
* @return bool false if file not found, does not return if found - just send the file
*/
function scorm_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload, array $options=array()) {
global $CFG;
if ($context->contextlevel != CONTEXT_MODULE) {
return false;
}
require_login($course, true, $cm);
$lifetime = null;
if ($filearea === 'content') {
$revision = (int)array_shift($args); // Prevents caching problems - ignored here.
$relativepath = implode('/', $args);
$fullpath = "/$context->id/mod_scorm/content/0/$relativepath";
// TODO: add any other access restrictions here if needed!
} else if ($filearea === 'package') {
if (!has_capability('moodle/course:manageactivities', $context)) {
return false;
}
$relativepath = implode('/', $args);
$fullpath = "/$context->id/mod_scorm/package/0/$relativepath";
$lifetime = 0; // No caching here.
} else if ($filearea === 'imsmanifest') { // This isn't a real filearea, it's a url parameter for this type of package.
$revision = (int)array_shift($args); // Prevents caching problems - ignored here.
$relativepath = implode('/', $args);
// Get imsmanifest file.
$fs = get_file_storage();
$files = $fs->get_area_files($context->id, 'mod_scorm', 'package', 0, '', false);
$file = reset($files);
// Check that the package file is an imsmanifest.xml file - if not then this method is not allowed.
$packagefilename = $file->get_filename();
if (strtolower($packagefilename) !== 'imsmanifest.xml') {
return false;
}
$file->send_relative_file($relativepath);
} else {
return false;
}
$fs = get_file_storage();
if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
if ($filearea === 'content') { // Return file not found straight away to improve performance.
send_header_404();
die;
}
return false;
}
// Finally send the file.
send_stored_file($file, $lifetime, 0, false, $options);
}
/**
* Handles the sending of temporary file to user, download is forced.
* File is deleted after abort or successful sending, does not return, script terminated
*
* @param string $path path to file, preferably from moodledata/temp/something; or content of file itself
* @param string $filename proposed file name when saving file
* @param bool $pathisstring If the path is string
*/
function send_temp_file($path, $filename, $pathisstring = false)
{
global $CFG;
// Guess the file's MIME type.
$mimetype = get_mimetype_for_sending($filename);
// close session - not needed anymore
\core\session\manager::write_close();
if (!$pathisstring) {
if (!file_exists($path)) {
send_header_404();
print_error('filenotfound', 'error', $CFG->wwwroot . '/');
}
// executed after normal finish or abort
core_shutdown_manager::register_function('send_temp_file_finished', array($path));
}
// if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
if (core_useragent::is_ie()) {
$filename = urlencode($filename);
}
header('Content-Disposition: attachment; filename="' . $filename . '"');
if (is_https()) {
// HTTPS sites - watch out for IE! KB812935 and KB316431.
header('Cache-Control: private, max-age=10, no-transform');
header('Expires: ' . gmdate('D, d M Y H:i:s', 0) . ' GMT');
header('Pragma: ');
} else {
//normal http - prevent caching at all cost
header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0, no-transform');
header('Expires: ' . gmdate('D, d M Y H:i:s', 0) . ' GMT');
header('Pragma: no-cache');
}
// send the contents - we can not accelerate this because the file will be deleted asap
if ($pathisstring) {
readstring_accel($path, $mimetype, false);
} else {
readfile_accel($path, $mimetype, false);
@unlink($path);
}
die;
//no more chars to output
}
/**
* Handles the sending of temporary file to user, download is forced.
* File is deleted after abort or successful sending, does not return, script terminated
*
* @param string $path path to file, preferably from moodledata/temp/something; or content of file itself
* @param string $filename proposed file name when saving file
* @param bool $pathisstring If the path is string
*/
function send_temp_file($path, $filename, $pathisstring = false)
{
global $CFG;
if (check_browser_version('Firefox', '1.5')) {
// only FF is known to correctly save to disk before opening...
$mimetype = mimeinfo('type', $filename);
} else {
$mimetype = 'application/x-forcedownload';
}
// close session - not needed anymore
session_get_instance()->write_close();
if (!$pathisstring) {
if (!file_exists($path)) {
send_header_404();
print_error('filenotfound', 'error', $CFG->wwwroot . '/');
}
// executed after normal finish or abort
@register_shutdown_function('send_temp_file_finished', $path);
}
// if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
if (check_browser_version('MSIE')) {
$filename = urlencode($filename);
}
header('Content-Disposition: attachment; filename="' . $filename . '"');
if (strpos($CFG->wwwroot, 'https://') === 0) {
//https sites - watch out for IE! KB812935 and KB316431
header('Cache-Control: max-age=10');
header('Expires: ' . gmdate('D, d M Y H:i:s', 0) . ' GMT');
header('Pragma: ');
} else {
//normal http - prevent caching at all cost
header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
header('Expires: ' . gmdate('D, d M Y H:i:s', 0) . ' GMT');
header('Pragma: no-cache');
}
// send the contents - we can not accelerate this because the file will be deleted asap
if ($pathisstring) {
readstring_accel($path, $mimetype, false);
} else {
readfile_accel($path, $mimetype, false);
@unlink($path);
}
die;
//no more chars to output
}
/**
* Serves scorm content, introduction images and packages. Implements needed access control ;-)
*
* @package mod_scorm
* @category files
* @param stdClass $course course object
* @param stdClass $cm course module object
* @param stdClass $context context object
* @param string $filearea file area
* @param array $args extra arguments
* @param bool $forcedownload whether or not force download
* @param array $options additional options affecting the file serving
* @return bool false if file not found, does not return if found - just send the file
*/
function scorm_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload, array $options = array())
{
global $CFG, $DB;
if ($context->contextlevel != CONTEXT_MODULE) {
return false;
}
require_login($course, true, $cm);
$canmanageactivity = has_capability('moodle/course:manageactivities', $context);
$lifetime = null;
// Check SCORM availability.
if (!$canmanageactivity) {
require_once $CFG->dirroot . '/mod/scorm/locallib.php';
$scorm = $DB->get_record('scorm', array('id' => $cm->instance), 'id, timeopen, timeclose', MUST_EXIST);
list($available, $warnings) = scorm_get_availability_status($scorm);
if (!$available) {
return false;
}
}
if ($filearea === 'content') {
$revision = (int) array_shift($args);
// Prevents caching problems - ignored here.
$relativepath = implode('/', $args);
$fullpath = "/{$context->id}/mod_scorm/content/0/{$relativepath}";
// TODO: add any other access restrictions here if needed!
} else {
if ($filearea === 'package') {
// Check if the global setting for disabling package downloads is enabled.
$protectpackagedownloads = get_config('scorm', 'protectpackagedownloads');
if ($protectpackagedownloads and !$canmanageactivity) {
return false;
}
$revision = (int) array_shift($args);
// Prevents caching problems - ignored here.
$relativepath = implode('/', $args);
$fullpath = "/{$context->id}/mod_scorm/package/0/{$relativepath}";
$lifetime = 0;
// No caching here.
} else {
if ($filearea === 'imsmanifest') {
// This isn't a real filearea, it's a url parameter for this type of package.
$revision = (int) array_shift($args);
// Prevents caching problems - ignored here.
$relativepath = implode('/', $args);
// Get imsmanifest file.
$fs = get_file_storage();
$files = $fs->get_area_files($context->id, 'mod_scorm', 'package', 0, '', false);
$file = reset($files);
// Check that the package file is an imsmanifest.xml file - if not then this method is not allowed.
$packagefilename = $file->get_filename();
if (strtolower($packagefilename) !== 'imsmanifest.xml') {
return false;
}
$file->send_relative_file($relativepath);
} else {
return false;
}
}
}
$fs = get_file_storage();
if (!($file = $fs->get_file_by_hash(sha1($fullpath))) or $file->is_directory()) {
if ($filearea === 'content') {
// Return file not found straight away to improve performance.
send_header_404();
die;
}
return false;
}
// Finally send the file.
send_stored_file($file, $lifetime, 0, false, $options);
}
/**
* Serves scorm content, introduction images and packages. Implements needed access control ;-)
*
* @package mod_scorm
* @category files
* @param stdClass $course course object
* @param stdClass $cm course module object
* @param stdClass $context context object
* @param string $filearea file area
* @param array $args extra arguments
* @param bool $forcedownload whether or not force download
* @param array $options additional options affecting the file serving
* @return bool false if file not found, does not return if found - just send the file
*/
function scorm_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload, array $options=array()) {
global $CFG;
if ($context->contextlevel != CONTEXT_MODULE) {
return false;
}
require_login($course, true, $cm);
$lifetime = isset($CFG->filelifetime) ? $CFG->filelifetime : 86400;
if ($filearea === 'content') {
$revision = (int)array_shift($args); // prevents caching problems - ignored here
$relativepath = implode('/', $args);
$fullpath = "/$context->id/mod_scorm/content/0/$relativepath";
// TODO: add any other access restrictions here if needed!
} else if ($filearea === 'package') {
if (!has_capability('moodle/course:manageactivities', $context)) {
return false;
}
$relativepath = implode('/', $args);
$fullpath = "/$context->id/mod_scorm/package/0/$relativepath";
$lifetime = 0; // no caching here
} else {
return false;
}
$fs = get_file_storage();
if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
if ($filearea === 'content') { //return file not found straight away to improve performance.
send_header_404();
die;
}
return false;
}
// finally send the file
send_stored_file($file, $lifetime, 0, false, $options);
}
/**
* Handles the sending of file data to the user's browser, including support for
* byteranges etc.
*
* The $options parameter supports the following keys:
* (string|null) preview - send the preview of the file (e.g. "thumb" for a thumbnail)
* (string|null) filename - overrides the implicit filename
* (bool) dontdie - return control to caller afterwards. this is not recommended and only used for cleanup tasks.
* if this is passed as true, ignore_user_abort is called. if you don't want your processing to continue on cancel,
* you must detect this case when control is returned using connection_aborted. Please not that session is closed
* and should not be reopened.
*
* @category files
* @param stored_file $stored_file local file object
* @param int $lifetime Number of seconds before the file should expire from caches (default 24 hours)
* @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only
* @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin
* @param array $options additional options affecting the file serving
* @return null script execution stopped unless $options['dontdie'] is true
*/
function send_stored_file($stored_file, $lifetime = 86400, $filter = 0, $forcedownload = false, array $options = array())
{
global $CFG, $COURSE;
if (empty($options['filename'])) {
$filename = null;
} else {
$filename = $options['filename'];
}
if (empty($options['dontdie'])) {
$dontdie = false;
} else {
$dontdie = true;
}
if (!empty($options['preview'])) {
// replace the file with its preview
$fs = get_file_storage();
$stored_file = $fs->get_file_preview($stored_file, $options['preview']);
if (!$stored_file) {
// unable to create a preview of the file
send_header_404();
die;
} else {
// preview images have fixed cache lifetime and they ignore forced download
// (they are generated by GD and therefore they are considered reasonably safe).
$lifetime = DAYSECS;
$filter = 0;
$forcedownload = false;
}
}
// handle external resource
if ($stored_file->is_external_file()) {
$stored_file->send_file($lifetime, $filter, $forcedownload, $options);
die;
}
if (!$stored_file or $stored_file->is_directory()) {
// nothing to serve
if ($dontdie) {
return;
}
die;
}
if ($dontdie) {
ignore_user_abort(true);
}
session_get_instance()->write_close();
// unlock session during fileserving
// Use given MIME type if specified, otherwise guess it using mimeinfo.
// IE, Konqueror and Opera open html file directly in browser from web even when directed to save it to disk :-O
// only Firefox saves all files locally before opening when content-disposition: attachment stated
$filename = is_null($filename) ? $stored_file->get_filename() : $filename;
$isFF = check_browser_version('Firefox', '1.5');
// only FF > 1.5 properly tested
$mimetype = ($forcedownload and !$isFF) ? 'application/x-forcedownload' : ($stored_file->get_mimetype() ? $stored_file->get_mimetype() : mimeinfo('type', $filename));
// if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
if (check_browser_version('MSIE')) {
$filename = rawurlencode($filename);
}
if ($forcedownload) {
header('Content-Disposition: attachment; filename="' . $filename . '"');
} else {
header('Content-Disposition: inline; filename="' . $filename . '"');
}
if ($lifetime > 0) {
header('Cache-Control: max-age=' . $lifetime);
header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $lifetime) . ' GMT');
header('Pragma: ');
} else {
// Do not cache files in proxies and browsers
if (strpos($CFG->wwwroot, 'https://') === 0) {
//https sites - watch out for IE! KB812935 and KB316431
header('Cache-Control: max-age=10');
header('Expires: ' . gmdate('D, d M Y H:i:s', 0) . ' GMT');
header('Pragma: ');
} else {
//normal http - prevent caching at all cost
header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
header('Expires: ' . gmdate('D, d M Y H:i:s', 0) . ' GMT');
header('Pragma: no-cache');
}
}
if (empty($filter)) {
// send the contents
readfile_accel($stored_file, $mimetype, !$dontdie);
} else {
// Try to put the file through filters
if ($mimetype == 'text/html') {
$options = new stdClass();
$options->noclean = true;
$options->nocache = true;
// temporary workaround for MDL-5136
$text = $stored_file->get_content();
$text = file_modify_html_header($text);
$output = format_text($text, FORMAT_HTML, $options, $COURSE->id);
readstring_accel($output, $mimetype, false);
} else {
if ($mimetype == 'text/plain' and $filter == 1) {
// only filter text if filter all files is selected
$options = new stdClass();
$options->newlines = false;
$options->noclean = true;
$text = $stored_file->get_content();
$output = '<pre>' . format_text($text, FORMAT_MOODLE, $options, $COURSE->id) . '</pre>';
readstring_accel($output, $mimetype, false);
} else {
// Just send it out raw
readfile_accel($stored_file, $mimetype, !$dontdie);
}
}
}
if ($dontdie) {
return;
}
die;
//no more chars to output!!!
}
/**
* Handles the sending of file data to the user's browser, including support for
* byteranges etc.
*
* The $options parameter supports the following keys:
* (string|null) preview - send the preview of the file (e.g. "thumb" for a thumbnail)
* (string|null) filename - overrides the implicit filename
* (bool) dontdie - return control to caller afterwards. this is not recommended and only used for cleanup tasks.
* if this is passed as true, ignore_user_abort is called. if you don't want your processing to continue on cancel,
* you must detect this case when control is returned using connection_aborted. Please not that session is closed
* and should not be reopened.
*
* @category files
* @global stdClass $CFG
* @global stdClass $COURSE
* @global moodle_session $SESSION
* @param stored_file $stored_file local file object
* @param int $lifetime Number of seconds before the file should expire from caches (default 24 hours)
* @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only
* @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin
* @param array $options additional options affecting the file serving
* @return null script execution stopped unless $options['dontdie'] is true
*/
function send_stored_file($stored_file, $lifetime = 86400, $filter = 0, $forcedownload = false, array $options = array())
{
global $CFG, $COURSE, $SESSION;
if (empty($options['filename'])) {
$filename = null;
} else {
$filename = $options['filename'];
}
if (empty($options['dontdie'])) {
$dontdie = false;
} else {
$dontdie = true;
}
if (!empty($options['preview'])) {
// replace the file with its preview
$fs = get_file_storage();
$stored_file = $fs->get_file_preview($stored_file, $options['preview']);
if (!$stored_file) {
// unable to create a preview of the file
send_header_404();
die;
} else {
// preview images have fixed cache lifetime and they ignore forced download
// (they are generated by GD and therefore they are considered reasonably safe).
$lifetime = DAYSECS;
$filter = 0;
$forcedownload = false;
}
}
if (!$stored_file or $stored_file->is_directory()) {
// nothing to serve
if ($dontdie) {
return;
}
die;
}
if ($dontdie) {
ignore_user_abort(true);
}
session_get_instance()->write_close();
// unlock session during fileserving
// Use given MIME type if specified, otherwise guess it using mimeinfo.
// IE, Konqueror and Opera open html file directly in browser from web even when directed to save it to disk :-O
// only Firefox saves all files locally before opening when content-disposition: attachment stated
$filename = is_null($filename) ? $stored_file->get_filename() : $filename;
$isFF = check_browser_version('Firefox', '1.5');
// only FF > 1.5 properly tested
$mimetype = ($forcedownload and !$isFF) ? 'application/x-forcedownload' : ($stored_file->get_mimetype() ? $stored_file->get_mimetype() : mimeinfo('type', $filename));
$lastmodified = $stored_file->get_timemodified();
$filesize = $stored_file->get_filesize();
if ($lifetime > 0 && !empty($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
// get unixtime of request header; clip extra junk off first
$since = strtotime(preg_replace('/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"]));
if ($since && $since >= $lastmodified) {
header('HTTP/1.1 304 Not Modified');
header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $lifetime) . ' GMT');
header('Cache-Control: max-age=' . $lifetime);
header('Content-Type: ' . $mimetype);
if ($dontdie) {
return;
}
die;
}
}
//do not put '@' before the next header to detect incorrect moodle configurations,
//error should be better than "weird" empty lines for admins/users
header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $lastmodified) . ' GMT');
// if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
if (check_browser_version('MSIE')) {
$filename = rawurlencode($filename);
}
if ($forcedownload) {
header('Content-Disposition: attachment; filename="' . $filename . '"');
} else {
header('Content-Disposition: inline; filename="' . $filename . '"');
}
if ($lifetime > 0) {
header('Cache-Control: max-age=' . $lifetime);
header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $lifetime) . ' GMT');
header('Pragma: ');
if (empty($CFG->disablebyteserving) && $mimetype != 'text/plain' && $mimetype != 'text/html') {
header('Accept-Ranges: bytes');
if (!empty($_SERVER['HTTP_RANGE']) && strpos($_SERVER['HTTP_RANGE'], 'bytes=') !== FALSE) {
// byteserving stuff - for acrobat reader and download accelerators
// see: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35
// inspired by: http://www.coneural.org/florian/papers/04_byteserving.php
$ranges = false;
if (preg_match_all('/(\\d*)-(\\d*)/', $_SERVER['HTTP_RANGE'], $ranges, PREG_SET_ORDER)) {
foreach ($ranges as $key => $value) {
if ($ranges[$key][1] == '') {
//suffix case
$ranges[$key][1] = $filesize - $ranges[$key][2];
$ranges[$key][2] = $filesize - 1;
} else {
if ($ranges[$key][2] == '' || $ranges[$key][2] > $filesize - 1) {
//fix range length
$ranges[$key][2] = $filesize - 1;
}
}
if ($ranges[$key][2] != '' && $ranges[$key][2] < $ranges[$key][1]) {
//invalid byte-range ==> ignore header
$ranges = false;
break;
}
//prepare multipart header
$ranges[$key][0] = "\r\n--" . BYTESERVING_BOUNDARY . "\r\nContent-Type: {$mimetype}\r\n";
$ranges[$key][0] .= "Content-Range: bytes {$ranges[$key][1]}-{$ranges[$key][2]}/{$filesize}\r\n\r\n";
}
} else {
$ranges = false;
}
if ($ranges) {
byteserving_send_file($stored_file->get_content_file_handle(), $mimetype, $ranges, $filesize);
}
}
} else {
/// Do not byteserve (disabled, strings, text and html files).
header('Accept-Ranges: none');
}
} else {
// Do not cache files in proxies and browsers
if (strpos($CFG->wwwroot, 'https://') === 0) {
//https sites - watch out for IE! KB812935 and KB316431
header('Cache-Control: max-age=10');
header('Expires: ' . gmdate('D, d M Y H:i:s', 0) . ' GMT');
header('Pragma: ');
} else {
//normal http - prevent caching at all cost
header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
header('Expires: ' . gmdate('D, d M Y H:i:s', 0) . ' GMT');
header('Pragma: no-cache');
}
header('Accept-Ranges: none');
// Do not allow byteserving when caching disabled
}
if (empty($filter)) {
if ($mimetype == 'text/plain') {
header('Content-Type: Text/plain; charset=utf-8');
//add encoding
} else {
header('Content-Type: ' . $mimetype);
}
header('Content-Length: ' . $filesize);
//flush the buffers - save memory and disable sid rewrite
//this also disables zlib compression
prepare_file_content_sending();
// send the contents
$stored_file->readfile();
} else {
// Try to put the file through filters
if ($mimetype == 'text/html') {
$options = new stdClass();
$options->noclean = true;
$options->nocache = true;
// temporary workaround for MDL-5136
$text = $stored_file->get_content();
$text = file_modify_html_header($text);
$output = format_text($text, FORMAT_HTML, $options, $COURSE->id);
header('Content-Length: ' . strlen($output));
header('Content-Type: text/html');
//flush the buffers - save memory and disable sid rewrite
//this also disables zlib compression
prepare_file_content_sending();
// send the contents
echo $output;
} else {
if ($mimetype == 'text/plain' and $filter == 1) {
// only filter text if filter all files is selected
$options = new stdClass();
$options->newlines = false;
$options->noclean = true;
$text = $stored_file->get_content();
$output = '<pre>' . format_text($text, FORMAT_MOODLE, $options, $COURSE->id) . '</pre>';
header('Content-Length: ' . strlen($output));
header('Content-Type: text/html; charset=utf-8');
//add encoding
//flush the buffers - save memory and disable sid rewrite
//this also disables zlib compression
prepare_file_content_sending();
// send the contents
echo $output;
} else {
// Just send it out raw
header('Content-Length: ' . $filesize);
header('Content-Type: ' . $mimetype);
//flush the buffers - save memory and disable sid rewrite
//this also disables zlib compression
prepare_file_content_sending();
// send the contents
$stored_file->readfile();
}
}
}
if ($dontdie) {
return;
}
die;
//no more chars to output!!!
}
/**
* Serves Tin Can content, introduction images and packages. Implements needed access control ;-)
*
* @package mod_tincanlaunch
* @category files
* @param stdClass $course course object
* @param stdClass $cm course module object
* @param stdClass $context context object
* @param string $filearea file area
* @param array $args extra arguments
* @param bool $forcedownload whether or not force download
* @param array $options additional options affecting the file serving
* @return bool false if file not found, does not return if found - just send the file
*/
function tincanlaunch_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload, array $options = array())
{
global $CFG, $DB;
if ($context->contextlevel != CONTEXT_MODULE) {
return false;
}
require_login($course, true, $cm);
$canmanageactivity = has_capability('moodle/course:manageactivities', $context);
if ($filearea === 'content') {
$filename = array_pop($args);
$filepath = implode('/', $args);
$lifetime = null;
} elseif ($filearea === 'package') {
$relativepath = implode('/', $args);
$fullpath = "/{$context->id}/tincanlaunch/package/0/{$relativepath}";
$lifetime = 0;
// No caching here.
} else {
return false;
}
$fs = get_file_storage();
if (!($file = $fs->get_file($context->id, 'mod_tincanlaunch', 'content', 0, '/' . $filepath . '/', $filename)) or $file->is_directory()) {
if ($filearea === 'content') {
// Return file not found straight away to improve performance.
send_header_404();
die;
}
return false;
}
// Finally send the file.
send_stored_file($file, $lifetime, 0, false, $options);
}
/**
* Handles the sending of temporary file to user, download is forced.
* File is deleted after abort or successful sending, does not return, script terminated
*
* @param string $path path to file, preferably from moodledata/temp/something; or content of file itself
* @param string $filename proposed file name when saving file
* @param bool $pathisstring If the path is string
*/
function send_temp_file($path, $filename, $pathisstring = false)
{
global $CFG;
// close session - not needed anymore
@session_get_instance()->write_close();
if (!$pathisstring) {
if (!file_exists($path)) {
send_header_404();
print_error('filenotfound', 'error', $CFG->wwwroot . '/');
}
// executed after normal finish or abort
@register_shutdown_function('send_temp_file_finished', $path);
}
// if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
if (check_browser_version('MSIE')) {
$filename = urlencode($filename);
}
$filesize = $pathisstring ? strlen($path) : filesize($path);
header('Content-Disposition: attachment; filename=' . $filename);
header('Content-Length: ' . $filesize);
if (strpos($CFG->wwwroot, 'https://') === 0) {
//https sites - watch out for IE! KB812935 and KB316431
header('Cache-Control: max-age=10');
header('Expires: ' . gmdate('D, d M Y H:i:s', 0) . ' GMT');
header('Pragma: ');
} else {
//normal http - prevent caching at all cost
header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
header('Expires: ' . gmdate('D, d M Y H:i:s', 0) . ' GMT');
header('Pragma: no-cache');
}
header('Accept-Ranges: none');
// Do not allow byteserving
//flush the buffers - save memory and disable sid rewrite
// this also disables zlib compression
prepare_file_content_sending();
// send the contents
if ($pathisstring) {
echo $path;
} else {
@readfile($path);
}
die;
//no more chars to output
}
