add Accept header

docs/api/README.md

@@ -93,7 +93,7 @@ Therefore running Nextcloud **with SSL is highly recommended** otherwise **every
 
 You can test your request using `curl`:
 
-    curl -u user:password https://yournextcloud.com/index.php/apps/notes/api/v1/notes
+    curl -u user:password -H "Accept: application/json" https://yournextcloud.com/index.php/apps/notes/api/v1/notes
 
 If you have enabled two-factor authentication you will have to create an app specific password for accessing the API. Please see [Nextcloud documentation](https://docs.nextcloud.com/server/latest/user_manual/session_management.html) for further details.
 

docs/api/v1.md

@@ -47,7 +47,7 @@ The base URL for all calls is:
 
 All defined routes in the specification are appended to this url. To access all notes for instance use this url (here shown as `curl` command):
 
-    curl -u user:password https://yournextcloud.com/index.php/apps/notes/api/v1/notes
+    curl -u user:password -H "Accept: application/json" https://yournextcloud.com/index.php/apps/notes/api/v1/notes
 
 
 

tests/api/AbstractAPITest.php

@@ -29,6 +29,7 @@ abstract class AbstractAPITest extends TestCase {
 			'base_uri' => 'http://localhost:8080/index.php/apps/notes/api/v'.$v.'/',
 			'auth' => ['test', 'test'],
 			'http_errors' => false,
+			'headers' => ['Accept' => 'application/json'],
 		]);
 	}
 

tests/api/CapabilitiesTest.php

@@ -14,6 +14,7 @@ class CapabilitiesTest extends TestCase {
 			'base_uri' => 'http://localhost:8080/',
 			'auth' => ['test', 'test'],
 			'http_errors' => false,
+			'headers' => ['Accept' => 'application/json'],
 		]);
 	}
 
@@ -21,7 +22,6 @@ class CapabilitiesTest extends TestCase {
 		$response = $this->http->request('GET', 'ocs/v2.php/cloud/capabilities', [
 			'headers' => [
 				'OCS-APIRequest' => 'true',
-				'Accept' => 'application/json',
 			]
 		]);
 		$this->assertEquals(200, $response->getStatusCode(), 'Response status code');