Bug 1550519. Fix HTMLPurifier disable external resource setting.

Add behat tests

Change-Id: I905af729d2cda76d5c6ff31b29b9d21c3dc67505

htdocs/init.php

@@ -433,6 +433,10 @@ if (!defined('INSTALLER')) {
         }
     }
 }
+
+if (get_config('disableexternalresources')) {
+    $CFG->wwwhost = parse_url($CFG->wwwroot, PHP_URL_HOST);
+}
 /*
  * Initializes our performance info early.
  *

htdocs/lib/web.php

@@ -3597,6 +3597,7 @@ function clean_html($text, $xhtml=false) {
 
     if (get_config('disableexternalresources')) {
         $config->set('URI.DisableExternalResources', true);
+        $config->set('URI.Host', get_config('wwwhost'));
     }
 
     // Permit embedding contents from other sites

test/behat/features/admin/disable_external_resources.feature

+@javascript @core @core_administration
+Feature: Enable/disable external resources to display in pages
+In order to control external resources displayed in mahara pages
+As an admin
+For security reason, I can enable/disable the setting "Disable external resources" in
+"Site configuration" page
+
+Background:
+    Given the following "users" exist:
+     | username | password | email | firstname | lastname | institution | authname | role |
+     | userA | Kupuhipa1 | test01@example.com | Pete | Mc | mahara | internal | member |
+    And the following "pages" exist:
+      | title | description| ownertype | ownername |
+      | Page 1 | This is the page | user | userA |
+
+Scenario: Enable/disable external resources in mahara pages
+# By default external resources are allowed in a page
+ When I log in as "userA" with password "Kupuhipa1"
+ # Upload an image
+ And I choose "Files" in "Content"
+ And I attach the file "Image2.png" to "files_filebrowser_userfile"
+ And I choose "Pages" in "Portfolio"
+ And I follow "Page 1"
+ And I follow "Edit this page"
+
+ # Add a "Text" block with an image from file area
+ And I follow "Text"
+ And I press "Add"
+ And I set the following fields to these values:
+ | Block title | Text block with an internal image |
+ And I click the "Insert/edit image" button in the editor
+ And I expand the section "Image"
+ And I follow "Image2.png"
+ And I press "Submit"
+ And I press "Save"
+
+ # Add a "Text" block with an embedded external image
+ And I follow "Text"
+ And I press "Add"
+ And I set the following fields to these values:
+ | Block title | Text block with an external image |
+ | Block content | <p><img title="Open source logo" src="https://upload.wikimedia.org/wikipedia/commons/thumb/4/42/Opensource.svg/744px-Opensource.svg.png" alt="" width="300" /></p> |
+ And I press "Save"
+ And I scroll to the id "main-nav"
+ And I follow "Display page"
+ Then I should see images in the block "Text block with an internal image"
+ And I should see images in the block "Text block with an external image"
+ And I log out
+
+# Disable external resources and check if external images are displayed in pages
+ When I log in as "admin" with password "Kupuhipa1"
+ And I choose "Administration"
+ And I choose "Site options" in "Configure site"
+ And I expand the section "Security settings"
+ And I enable the switch "Disable external resources in user HTML"
+ And I press "Update site options"
+ And I log out
+ And I log in as "userA" with password "Kupuhipa1"
+ And I choose "Pages" in "Portfolio"
+ And I follow "Page 1"
+ Then I should see images in the block "Text block with an internal image"
+ And I should not see images in the block "Text block with an external image"
\ No newline at end of file