From beadba759a95fd81f2ef8220196e3d35971c5d1e Mon Sep 17 00:00:00 2001
From: sam marshall <s.marshall@open.ac.uk>
Date: Tue, 11 Nov 2014 16:38:26 +0000
Subject: [PATCH] MDL-48179 Backup progress: Can time out when compressing
 large backup

---
 backup/moodle2/backup_stepslib.php            | 22 +++++++++++++++++--
 .../helper/backup_general_helper.class.php    |  8 +++++--
 2 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/backup/moodle2/backup_stepslib.php b/backup/moodle2/backup_stepslib.php
index f767133a090..5c91c863840 100644
--- a/backup/moodle2/backup_stepslib.php
+++ b/backup/moodle2/backup_stepslib.php
@@ -1682,9 +1682,23 @@ class backup_zip_contents extends backup_execution_step implements file_progress
         // Get the zip packer
         $zippacker = get_file_packer('application/vnd.moodle.backup');
 
+        // Track overall progress for the 2 long-running steps (archive to
+        // pathname, get backup information).
+        $reporter = $this->task->get_progress();
+        $reporter->start_progress('backup_zip_contents', 2);
+
         // Zip files
         $result = $zippacker->archive_to_pathname($files, $zipfile, true, $this);
 
+        // If any sub-progress happened, end it.
+        if ($this->startedprogress) {
+            $this->task->get_progress()->end_progress();
+            $this->startedprogress = false;
+        } else {
+            // No progress was reported, manually move it on to the next overall task.
+            $reporter->progress(1);
+        }
+
         // Something went wrong.
         if ($result === false) {
             @unlink($zipfile);
@@ -1692,16 +1706,20 @@ class backup_zip_contents extends backup_execution_step implements file_progress
         }
         // Read to make sure it is a valid backup. Refer MDL-37877 . Delete it, if found not to be valid.
         try {
-            backup_general_helper::get_backup_information_from_mbz($zipfile);
+            backup_general_helper::get_backup_information_from_mbz($zipfile, $this);
         } catch (backup_helper_exception $e) {
             @unlink($zipfile);
             throw new backup_step_exception('error_zip_packing', '', $e->debuginfo);
         }
 
-            // If any progress happened, end it.
+        // If any sub-progress happened, end it.
         if ($this->startedprogress) {
             $this->task->get_progress()->end_progress();
+            $this->startedprogress = false;
+        } else {
+            $reporter->progress(2);
         }
+        $reporter->end_progress();
     }
 
     /**
diff --git a/backup/util/helper/backup_general_helper.class.php b/backup/util/helper/backup_general_helper.class.php
index e84d2f6f8ac..d9ad80d5b28 100644
--- a/backup/util/helper/backup_general_helper.class.php
+++ b/backup/util/helper/backup_general_helper.class.php
@@ -230,11 +230,15 @@ abstract class backup_general_helper extends backup_helper {
      * This will only extract the moodle_backup.xml file from an MBZ
      * file and then call {@link self::get_backup_information()}.
      *
+     * This can be a long-running (multi-minute) operation for large backups.
+     * Pass a $progress value to receive progress updates.
+     *
      * @param string $filepath absolute path to the MBZ file.
+     * @param file_progress $progress Progress updates
      * @return stdClass containing information.
      * @since Moodle 2.4
      */
-    public static function get_backup_information_from_mbz($filepath) {
+    public static function get_backup_information_from_mbz($filepath, file_progress $progress = null) {
         global $CFG;
         if (!is_readable($filepath)) {
             throw new backup_helper_exception('missing_moodle_backup_file', $filepath);
@@ -245,7 +249,7 @@ abstract class backup_general_helper extends backup_helper {
         $tmpdir = $CFG->tempdir . '/backup/' . $tmpname;
         $fp = get_file_packer('application/vnd.moodle.backup');
 
-        $extracted = $fp->extract_to_pathname($filepath, $tmpdir, array('moodle_backup.xml'));
+        $extracted = $fp->extract_to_pathname($filepath, $tmpdir, array('moodle_backup.xml'), $progress);
         $moodlefile =  $tmpdir . '/' . 'moodle_backup.xml';
         if (!$extracted || !is_readable($moodlefile)) {
             throw new backup_helper_exception('missing_moodle_backup_xml_file', $moodlefile);