[WWcvs] wwmoodle: New Version

[Matt L. v. a. <we...@ma...>]

Log Message:
-----------
New Version

Added Files:
-----------
    wwmoodle/wwquestion:
        file.php

Revision Data
-------------
--- /dev/null
+++ wwquestion/file.php
@@ -0,0 +1,75 @@
+<?php
+    //This script fetches files from wwquestions directory, and only that directory.
+    //It is used to display the cached equation images that are copied to moodledata when derived questions are created
+
+    require_once('../../../config.php');
+    require_once($CFG->libdir . '/filelib.php');
+
+    // disable moodle specific debug messages
+    disable_debugging();
+
+    $relativepath = get_file_argument('file.php');
+    $forcedownload = optional_param('forcedownload', 0, PARAM_BOOL);
+    
+    // relative path must start with '/', because of backup/restore!!!
+    if (!$relativepath) {
+        error('No valid arguments supplied or incorrect server configuration');
+    } else if ($relativepath{0} != '/') {
+        error('No valid arguments supplied, path does not start with slash!');
+    }
+
+    $pathname = $CFG->dataroot.$relativepath;
+
+    // extract relative path components
+    $args = explode('/', trim($relativepath, '/'));
+    
+    //security this should only be used for wwquestions
+    if ((count($args) < 3) || ($args[0] != 'wwquestions')) {
+        error('No valid arguments supplied');
+    }
+    
+    //extra security for users
+    if($args[1] == 'users') {
+        //trying to get a user equation image
+        //BEEF this up with roles etc, so teachers have access to students pics so on.
+        if($args[2] != $USER->id) {
+            error('Access Denied to this Picture');
+        }
+    }
+    
+    
+
+    if (is_dir($pathname)) {
+        if (file_exists($pathname.'/index.html')) {
+            $pathname = rtrim($pathname, '/').'/index.html';
+            $args[] = 'index.html';
+        } else if (file_exists($pathname.'/index.htm')) {
+            $pathname = rtrim($pathname, '/').'/index.htm';
+            $args[] = 'index.htm';
+        } else if (file_exists($pathname.'/Default.htm')) {
+            $pathname = rtrim($pathname, '/').'/Default.htm';
+            $args[] = 'Default.htm';
+        } else {
+            // security: do not return directory node!
+            not_found($course->id);
+        }
+    }
+
+    // check that file exists
+    if (!file_exists($pathname)) {
+        not_found($course->id);
+    }
+
+    // ========================================
+    // finally send the file
+    // ========================================
+    session_write_close(); // unlock session during fileserving
+    $filename = $args[count($args)-1];
+    send_file($pathname, $filename);
+
+    function not_found($courseid) {
+        global $CFG;
+        header('HTTP/1.0 404 not found');
+        error(get_string('filenotfound', 'error'), $CFG->wwwroot.'/course/view.php?id='.$courseid); //this is not displayed on IIS??
+    }
+?>