server/apps/files_sharing/appinfo/routes.php

<?php

namespace OCA\Files_Sharing\AppInfo;

use OCA\Files_Sharing\Application;

$application = new Application();
$application->registerRoutes($this, [
	'resources' => [
		'ExternalShares' => ['url' => '/api/externalShares'],
	]
]);

/** @var $this \OCP\Route\IRouter */
$this->create('core_ajax_public_preview', '/publicpreview')->action(
	function() {
		require_once __DIR__ . '/../ajax/publicpreview.php';
	});

$this->create('files_sharing_ajax_list', 'ajax/list.php')
	->actionInclude('files_sharing/ajax/list.php');
$this->create('files_sharing_ajax_publicpreview', 'ajax/publicpreview.php')
	->actionInclude('files_sharing/ajax/publicpreview.php');
$this->create('sharing_external_shareinfo', '/shareinfo')
	->actionInclude('files_sharing/ajax/shareinfo.php');
$this->create('sharing_external_add', '/external')
	->actionInclude('files_sharing/ajax/external.php');
$this->create('sharing_external_test_remote', '/testremote')
	->actionInclude('files_sharing/ajax/testremote.php');

// OCS API

//TODO: SET: mail notification, waiting for PR #4689 to be accepted

\OC_API::register('get',
		'/apps/files_sharing/api/v1/shares',
		array('\OCA\Files_Sharing\API\Local', 'getAllShares'),
		'files_sharing');

\OC_API::register('post',
		'/apps/files_sharing/api/v1/shares',
		array('\OCA\Files_Sharing\API\Local', 'createShare'),
		'files_sharing');

\OC_API::register('get',
		'/apps/files_sharing/api/v1/shares/{id}',
		array('\OCA\Files_Sharing\API\Local', 'getShare'),
		'files_sharing');

\OC_API::register('put',
		'/apps/files_sharing/api/v1/shares/{id}',
		array('\OCA\Files_Sharing\API\Local', 'updateShare'),
		'files_sharing');

\OC_API::register('delete',
		'/apps/files_sharing/api/v1/shares/{id}',
		array('\OCA\Files_Sharing\API\Local', 'deleteShare'),
		'files_sharing');