For testing this issue:

1. You need to have access to console on your system
2. Curl and python should be installed on your system.
3. Have basic understanding of Json

Test

1. Run following command on your console

   curl 'http://qa.moodle.net/webservice/rest/server.php?moodlewsrestformat=json' -H 'Pragma: no-cache' -H 'Origin: file://' -H 'Accept-Encoding: gzip,deflate,sdch' -H 'Accept-Language: es,en;q=0.8,de-DE;q=0.6,de;q=0.4,nb;q=0.2' -H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1798.0 Safari/537.36' -H 'Content-Type: application/x-www-form-urlencoded; charset=UTF-8' -H 'Accept: application/json, text/javascript, /; q=0.01' -H 'Cache-Control: no-cache' -H 'Connection: keep-alive' --data 'courseid=3&wsfunction=core_course_get_contents&wstoken=d49d1fac7125d9fd515c374be8d37c34' --compressed | python -m json.tool

2. Ensure you receive a list of course modules including all the activities in "Activity examples" course on qa.moodle.net
3. Now replace the --data value to tests the different options:
   • You should see course topics list but not activity modules

     --data 'options%5B0%5D%5Bname%5D=excludemodules&options%5B0%5D%5Bvalue%5D=1&courseid=3&wsfunction=core_course_get_contents&wstoken=d49d1fac7125d9fd515c374be8d37c34'

   • You should see the course topics list, including activities and resources. The resources must have an empty contents attribute

     --data 'options%5B0%5D%5Bname%5D=excludecontents&options%5B0%5D%5Bvalue%5D=4&courseid=3&wsfunction=core_course_get_contents&wstoken=d49d1fac7125d9fd515c374be8d37c34'

   • In this case you will be a single section with resources without contents

     --data 'options%5B0%5D%5Bname%5D=sectionnumber&options%5B0%5D%5Bvalue%5D=10&options%5B1%5D%5Bname%5D=excludecontents&options%5B1%5D%5Bvalue%5D=4&courseid=3&wsfunction=core_course_get_contents&wstoken=d49d1fac7125d9fd515c374be8d37c34'