Why do I get 404 Error when using Google Classroom API? - php

Question

I am writing an app in PHP which will connect to my domains's Google Classroom. However I get the following error when I try to do anything with the Google Classroom API:
Message: Error calling GET https://www.googleapis.com/v1/courses?pageSize=100: (404) Not Found
My code so far:
$scopes = array(
'https://www.googleapis.com/auth/classroom.courses',
'https://www.googleapis.com/auth/classroom.courses.readonly',
'https://www.googleapis.com/auth/classroom.rosters',
'https://www.googleapis.com/auth/classroom.rosters.readonly'
);
$gServiceEmail = "random#developer.gserviceaccount.com";
$gServiceKey = file_get_contents("../path/to/cert.p12");
$client = new Google_Client();
$gAuth = new Google_Auth_AssertionCredentials(
$gServiceEmail,
$scopes,
$gServiceKey
);
$gAuth->sub = "user#mydomain.com";
$client->setAssertionCredentials($gAuth);
$service = new Google_Service_Classroom($client);
$results = $service->courses->listCourses();
I have enabled the scopes in the API Settings in the Google Admin Console for the service account and enabled the api in the developer console. Where am I going wrong?

Answer 1

I think your endpoint is wrong according to the documentation of Classroom API. Try changing it to https://classroom.googleapis.com
sample request:
GET https://classroom.googleapis.com/v1/courses?pageSize=100&key={YOUR_API_KEY}

Answer 2

Course with id is not found.
For a list of courses, use the courses.list(), as shown in the following sample.
$client = getClient();
$service = new Google_Service_Classroom($client);
// Print the first 10 courses the user has access to.
$optParams = array(
'pageSize' => 10
);
$results = $service->courses->listCourses($optParams);
if (count($results->getCourses()) == 0) {
print "No courses found.\n";
} else {
print "Courses:\n";
foreach ($results->getCourses() as $course) {
printf("%s (%s)\n", $course->getName(), $course->getId());
}
}
References:
https://developers.google.com/classroom/quickstart/php?hl=en
https://developers.google.com/classroom/guides/manage-courses?hl=en