MDL-14589 initial file storage implementation, temporary file manager, migration of course files; blog conversion MDL-15905; assignment conversion MDL-15904; fromslib related file improvements MDL-15906

2008-07-31 22:15:30 +00:00
parent 1e908abea4
commit 172dd12c63
48 changed files with 3578 additions and 1529 deletions
@@ -0,0 +1,181 @@
+<?php  // $Id$
+
+    require_once('config.php');
+    require_once('lib/filelib.php');
+
+    // disable moodle specific debug messages
+    disable_debugging();
+
+    $relativepath = get_file_argument('file.php');
+    $forcedownload = optional_param('forcedownload', 0, PARAM_BOOL);
+
+    // relative path must start with '/'
+    if (!$relativepath) {
+        print_error('invalidargorconf');
+    } else if ($relativepath{0} != '/') {
+        print_error('pathdoesnotstartslash');
+    }
+
+    // extract relative path components
+    $args = explode('/', ltrim($relativepath, '/'));
+
+    if (count($args) == 0) { // always at least user id
+        print_error('invalidarguments');
+    }
+
+    $contextid = (int)array_shift($args);
+    $filearea = array_shift($args);
+
+    $context = get_context_instance_by_id($contextid);
+    $fs = get_file_storage();
+
+
+    if ($context->contextlevel == CONTEXT_SYSTEM) {
+        if ($filearea === 'blog') {
+
+            if (empty($CFG->bloglevel)) {
+                print_error('siteblogdisable', 'blog');
+            }
+            if ($CFG->bloglevel < BLOG_GLOBAL_LEVEL) {
+                require_login();
+                if (isguestuser()) {
+                    print_error('noguest');
+                }
+                if ($CFG->bloglevel == BLOG_USER_LEVEL) {
+                    if ($USER->id != $entry->userid) {
+                        not_found();
+                    }
+                }
+            }
+            $entryid = (int)array_shift($args);
+            if (!$entry = $DB->get_record('post', array('module'=>'blog', 'id'=>$entryid))) {
+                not_found();
+            }
+            if ('publishstate' === 'public') {
+                if ($CFG->forcelogin) {
+                    require_login();
+                }
+
+            } else if ('publishstate' === 'site') {
+                require_login();
+                //ok
+            } else if ('publishstate' === 'draft') {
+                require_login();
+                if ($USER->id != $entry->userid) {
+                    not_found();
+                }
+            }
+
+            //TODO: implement shared course and shared group access
+
+            $relativepath = '/'.implode('/', $args);
+            $fullpath = $context->id.'blog'.$entryid.$relativepath;
+
+            if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
+                not_found();
+            }
+
+            send_stored_file($file, 10*60, 0, true); // downlaod MUST be forced - security!
+
+        } else {
+            not_found();
+        }
+
+
+    } else if ($context->contextlevel == CONTEXT_USER) {
+        not_found();
+
+
+    } else if ($context->contextlevel == CONTEXT_COURSECAT) {
+        if ($filearea !== 'intro') {
+            not_found();
+        }
+
+        if ($CFG->forcelogin) {
+            // no login necessary - unless login forced everywhere
+            require_login();
+        }
+
+        $relativepath = '/'.implode('/', $args);
+        $fullpath = $context->id.'intro0'.$relativepath;
+
+        if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->get_filename() == '.') {
+            not_found();
+        }
+
+        session_write_close(); // unlock session during fileserving
+        send_stored_file($file, 60*60, 0, $forcedownload);
+
+
+    } else if ($context->contextlevel == CONTEXT_COURSE) {
+        if ($filearea !== 'intro' and $filearea !== 'backup') {
+            not_found();
+        }
+
+        if (!$course = $DB->get_record('course', array('id'=>$context->instanceid))) {
+            print_error('invalidcourseid');
+        }
+
+        if ($filearea === 'backup') {
+            require_login($course);
+            require_capability('moodle/site:backupdownload', $context);
+        } else {
+            if ($CFG->forcelogin) {
+                require_login();
+            }
+        }
+
+        $relativepath = '/'.implode('/', $args);
+        $fullpath = $context->id.'intro0'.$relativepath;
+
+        if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
+            not_found();
+        }
+
+        session_write_close(); // unlock session during fileserving
+        send_stored_file($file, 60*60, 0, $forcedownload);
+
+
+    } else if ($context->contextlevel == CONTEXT_MODULE) {
+        
+        if (!$coursecontext = get_context_instance_by_id(get_parent_contextid($context))) {
+            not_found();
+        }
+
+        if (!$course = $DB->get_record('course', array('id'=>$coursecontext->instanceid))) {
+            not_found();
+        }
+        $modinfo = get_fast_modinfo($course);
+        if (empty($modinfo->cms[$context->instanceid])) {
+            not_found();
+        }
+
+        $cminfo = $modinfo->cms[$context->instanceid];
+        $modname = $cminfo->modname;
+        $libfile = "$CFG->dirroot/mod/$modname/lib.php";
+        if (file_exists($libfile)) {
+            require_once($libfile);
+            $filefunction = $modname.'_pluginfile';
+            if (function_exists($filefunction)) {
+                if ($filefunction($course, $cminfo, $context, $filearea, $args) !== false) {
+                    die;
+                }
+            }
+        }
+        not_found();
+
+    } else if ($context->contextlevel == CONTEXT_BLOCK) {
+        //not supported yet
+        not_found();
+
+
+    } else {
+        not_found();
+    }
+
+
+    function not_found() {
+        global $CFG;
+        header('HTTP/1.0 404 not found');
+        print_error('filenotfound', 'error', $CFG->wwwroot.'/'); //this is not displayed on IIS??
+    }