Remove Zend XML-RPC from Moodle's XML-RPC web service

PHPUnit

1. Run PHPUnit test webservice/xmlrpc/tests/lib_test.php.
   Confirm that no failures or errors occur.

XML-RPC server test

1. Login as admin.
2. Go to Site administration ▶︎ Plugins ▶︎ Web services ▶︎ Mobile
3. Set "Enable web services for mobile devices" (enablemobilewebservice) as checked. Click "Save changes".
4. Go to Site administration ▶︎ Plugins ▶︎ Web services ▶︎ Manage protocols.
5. Enable the XML-RPC protocol. Click "Save changes".
6. Go to Site administration ▶︎ Plugins ▶︎ Web services ▶︎ Manage tokens.
7. Click Add.
8. On the Create token page, select a user among the list then click "Save changes". Take note of the generated token.
9. Using a terminal, enter the following curl command:

   curl 'http://[SERVER_ADDRESS_HERE]/stable_master/webservice/xmlrpc/server.php?&wstoken=[TOKEN_HERE]' -H "Content-Type: text/xml" --data "<?xml version='1.0' encoding='UTF-8'?><methodCall><methodName>core_course_get_courses</methodName><params> </params></methodCall>"

   • Confirm that a proper XML-RPC response is being generated.
10. Using the previous curl command, use an invalid token or an invalid web service method name.
    • Confirm that a proper XML-RPC fault response is being generated.

XML-RPC client test

1. Login as admin.
2. Go to Site administration ▶︎ Development ▶︎ Web service test client
3. Under "Authentication method" select "token".
4. Under "Protocol", select "XML-RPC protocol".
5. Under "Function", select "moodle_user_get_users_by_id"
6. Enter the previously generated token into the token field, and enter 1 or more user ID's into the userids fields. Click "Execute".
   • Confirm that the user information associated with the entered user IDs are being displayed.
7. Change the token field with an invalid value and click "Execute".
   • Confirm that a Moodle exception with a message like exception 'Exception' with message 'Invalid token - token not found | ERRORCODE: invalidtoken is being shown.