Uploading file to Moodle using the REST Service core_files_upload

Question

I am developing an Android app, which will upload content to a user's private files in my Moodle installation using the REST webservice core_files_upload provided by Moodle. core_files_upload takes the following parameters: ``` contextid component filearea itemid filepath filename filecontent ``` The documentation for the Moodle Web Services isn't very detailed so I have pieced together what I can from the Moodle forums and Google searches, but I feel I have come to a dead end. From examples I have seen that the parameters take the following values: ``` contextid: int - not sure whether this is the userid component: "user" filearea: "private" itemid: 0 filepath: "/" filename: "filename.jpg" filecontent: base64 encoding of file ``` I am using my userid as the contextid - I'm usnsure whether this is correct due to lack of documentation. When I post this I receieve the error: ``` {"exception":"moodle_exception","errorcode":"nofile","message":"File not specified"} ``` I have looked at whe…

Accepted Answer

Ok, so after a bit of further reading and hacking around with code I can confirm that the context id is not the user id, but is derived from the user id. I have not found any way in Moodle to get the the context id, so I have created my own. Once I had the context id for the user, the upload worked.

```
define('AJAX_SCRIPT', true);
define('NO_MOODLE_COOKIES', true);

require_once(dirname(dirname(__FILE__)) . '/config.php');
require_once($CFG->dirroot . '/webservice/lib.php');

echo $OUTPUT->header();

// authenticate the user
$token = required_param('token', PARAM_ALPHANUM);
$webservicelib = new webservice();
$authenticationinfo = $webservicelib->authenticate_user($token);

// check the user can manage his own files (can upload)
$context = context_user::instance($USER->id);
$result = array("contextid"=>$context->id);
echo json_encode($result);
```

Hope this helps anyone else who faces the same problem.

Uploading file to Moodle using the REST Service core_files_upload

Solution

Problem