Merged in bugfix/HOR-1750 (pull request #5644)

HOR-1750

Approved-by: Paula Quispe <paula.quispe@processmaker.com>
Approved-by: Julio Cesar Laura Avendaño <contact@julio-laura.com>

workflow/engine/src/ProcessMaker/Policies/ControlUnderUpdating.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace ProcessMaker\Policies;
+
+use \Luracast\Restler\iAuthenticate;
+use \Luracast\Restler\RestException;
+
+/**
+ * ControlUnderUpdating sends an error signal 503 to report that the application 
+ * is in update.
+ */
+class ControlUnderUpdating implements iAuthenticate
+{
+
+    /**
+     * Access verification method.
+     *
+     * API access will be denied when this method returns false
+     *
+     * @return boolean true when api access is allowed false otherwise
+     * @throws RestException
+     */
+    public function __isAllowed()
+    {
+        $response = true;
+        self::verifyUnderUpgrading();
+        return $response;
+    }
+
+    /**
+     * Required by interface iAuthenticate 
+     * @return string string to be used with WWW-Authenticate header
+     * @example Basic
+     * @example Digest
+     * @example OAuth
+     * @return string
+     */
+    public function __getWWWAuthenticateString()
+    {
+        return '';
+    }
+
+    /**
+     * Verify under upgrading, if the state is under update an exception is 
+     * thrown of type RestException.
+     * @throws RestException
+     */
+    public static function verifyUnderUpgrading()
+    {
+        $underUpdating = \Bootstrap::isPMUnderUpdating();
+        if ($underUpdating['action']) {
+            $sysTemp = true;
+            if (defined('SYS_TEMP')) {
+                $sysTemp = $underUpdating['workspace'] == SYS_TEMP;
+            }
+            if ($underUpdating['workspace'] == 'true' || $sysTemp) {
+                $message = 'The server is currently unable to handle the request '
+                        . 'due to temporary overloading or server maintenance ('
+                        . 'an application update has probably been performed on '
+                        . 'the server)';
+                throw new RestException(503, $message);
+            }
+        }
+    }
+
+}

workflow/engine/src/ProcessMaker/Services/OAuth2/Server.php

@@ -284,6 +284,8 @@ class Server implements iAuthenticate
      */
     public function postToken($request = null, $returnResponse = false)
     {
+        \ProcessMaker\Policies\ControlUnderUpdating::verifyUnderUpgrading();
+        
         // Handle a request for an OAuth2.0 Access Token and send the response to the client
         if ($request == null) {
             $request = \OAuth2\Request::createFromGlobals();