Some improvements in RSS:
[moodle.git] / rss / file.php
CommitLineData
8adcb49f 1<?PHP //$Id
2 //This file returns the required rss feeds
3 //The URL format MUST include:
4 // course: the course id
5 // user: the user id
6 // name: the name of the module (forum...)
7 // id: the id of the module (forumid...)
8 //If the course has a password or it doesn't
9 //allow guest access then the user field is
10 //required to see that the user is enrolled
11 //in the course, else no check is performed.
12 //This allows to limit a bit the rss access
13 //to correct users. It isn't unbreakable,
14 //obviously, but its the best I've thought!!
15
16 require_once("../config.php");
17 require_once("$CFG->dirroot/files/mimetypes.php");
18
19 $allowed = true;
20 $error = false;
21
22 if (empty($CFG->filelifetime)) {
23 $CFG->filelifetime = 86400; /// Seconds for files to remain in caches
24 }
25
26 if (isset($file)) { // workaround for situations where / syntax doesn't work
27 $pathinfo = $file;
28 } else {
29 $pathinfo = get_slash_arguments("file.php");
30 }
31
32 if (!$pathinfo) {
33 $error = true;
34 }
35
36 $pathinfo = urldecode($pathinfo);
37
38 if (! $args = parse_slash_arguments($pathinfo)) {
39 $error = true;
40 }
41
42 $numargs = count($args);
43 if ($numargs < 5 or empty($args[1])) {
44 $error = true;
45 }
46
47 $courseid = (integer)$args[0];
48 if (! $course = get_record("course", "id", $courseid)) {
49 $error = true;
50 }
51
52 //Check for "security" if !course->guest or course->password
53 if (!$course->guest || $course->password) {
54 $allowed = (isstudent($course->id,$args[1]) || isteacher($course->id,$args[1]));
55 }
56
57 $pathname = $CFG->dataroot."/rss/".$args[2]."/".$args[3].".xml";
58 $filename = $args[$numargs-1];
59
60 //If the file exists and its allowed for me, download it!
61 if (file_exists($pathname) && $allowed && !$error) {
62 $lastmodified = filemtime($pathname);
63 $mimetype = mimeinfo("type", $filename);
64
65 header("Last-Modified: " . gmdate("D, d M Y H:i:s", $lastmodified) . " GMT");
66 header("Expires: " . gmdate("D, d M Y H:i:s", time() + $CFG->filelifetime) . " GMT");
67 header("Cache-control: max_age = $CFG->filelifetime");
68 header("Pragma: ");
69 header("Content-disposition: inline; filename=$filename");
70
71 header("Content-length: ".filesize($pathname));
72 header("Content-type: $mimetype");
73 readfile($pathname);
74 }
75
76?>