The authorization step with client registration and authorization code retrieval working. Might not conform perfectly to OAuth2 spec, but it is a start.

Zotlabs/Module/Authorize.php

@@ -4,7 +4,6 @@ namespace Zotlabs\Module;
 
 use Zotlabs\Identity\OAuth2Storage;
 
-
 class Authorize extends \Zotlabs\Web\Controller {
 
 	function init() {
@@ -27,10 +26,61 @@ class Authorize extends \Zotlabs\Web\Controller {
 				$_SERVER['PHP_AUTH_PW'] = $password;
 			}
 		}
+	}
 
-		$s = new \Zotlabs\Identity\OAuth2Server(new OAuth2Storage(\DBA::$dba->db));
+	function get() {
+		if (!local_channel()) {
+			return login();
+		} else {
+			// display an authorization form
+			$app = array('name' => 'Test App', 'icon' => '/images/icons/plugin.png');
+			$o .= replace_macros(get_markup_template('oauth_authorize.tpl'), array(
+				'$title' => '',
+				'$authorize' => 'Do you authorize the app "' . $app['name'] . '" to access your channel data?',
+				'$app' => $app,
+				'$yes' => t('Allow'),
+				'$no' => t('Deny'),
+				'$client_id' => (x($_REQUEST, 'client_id') ? $_REQUEST['client_id'] : ''),
+				'$redirect_uri' => (x($_REQUEST, 'redirect_uri') ? $_REQUEST['redirect_uri'] : ''),
+				'$state' => (x($_REQUEST, 'state') ? $_REQUEST['state'] : '')
+			));
+			return $o;
+		}
+	}
+
+	function post() {
+		if (!local_channel()) {
+			return $this->get();
+		}
+
+		$storage = new OAuth2Storage(\DBA::$dba->db);
+		$s = new \Zotlabs\Identity\OAuth2Server($storage);
+
+
+		// If no client_id was provided, generate a new one.
+		if (x($_POST, 'client_id')) {
+			$client_id = $_POST['client_id'];
+			logger('client_id was provided: ' . $client_id);
+		} else {
+			$client_id = $_POST['client_id'] = random_string(16);
+			logger('client_id was not provided. Generated new id: ' . $client_id);
+		}
+		// If no redirect_uri was provided, generate a fake one.
+		if (x($_POST, 'redirect_uri')) {
+			$redirect_uri = $_POST['redirect_uri'];
+		} else {
+			$redirect_uri = $_POST['redirect_uri'] = 'https://fake.example.com';
+		}
+
+		logger('redirect_uri is : ' . $redirect_uri);
+		// If the client is not registered, add to the database
+		if (!$storage->getClientDetails($client_id)) {
+			$client_secret = random_string(16);
+			$storage->setClientDetails($client_id, $client_secret, $redirect_uri);
+		}
 
 		$request = \OAuth2\Request::createFromGlobals();
+		logger(json_encode($request, JSON_PRETTY_PRINT), LOGGER_DEBUG);
 		$response = new \OAuth2\Response();
 
 		// validate the authorize request
@@ -39,19 +89,8 @@ class Authorize extends \Zotlabs\Web\Controller {
 			killme();
 		}
 
-		// display an authorization form
-		if (empty($_POST)) {
-
-			return '
-<form method="post">
-  <label>Do You Authorize TestClient?</label><br />
-  <input type="submit" name="authorized" value="yes">
-  <input type="submit" name="authorized" value="no">
-</form>';
-		}
-
 		// print the authorization code if the user has authorized your client
-		$is_authorized = ($_POST['authorized'] === 'yes');
+		$is_authorized = ($_POST['authorize'] === 'allow');
 		$s->handleAuthorizeRequest($request, $response, $is_authorized, local_channel());
 		if ($is_authorized) {
 			// this is only here so that you get to see your code in the cURL request. Otherwise,

Zotlabs/Module/Oauth2testvehicle.php

@@ -4,6 +4,17 @@ namespace Zotlabs\Module;
 
 class OAuth2TestVehicle extends \Zotlabs\Web\Controller {
 
+	function init() {
+		
+		// If there is a 'code' and 'state' parameter then this is a client app 
+		// callback issued after the authorization code request
+		if ($_REQUEST['code'] && $_REQUEST['state']) {
+			logger('Authorization callback invoked.', LOGGER_DEBUG);
+			logger(json_encode($_REQUEST, JSON_PRETTY_PRINT), LOGGER_DEBUG);
+			info('Authorization callback invoked.' . EOL);
+			return $this->get();
+		}
+	}
 	function get() {
 
 		$o .= replace_macros(get_markup_template('oauth2testvehicle.tpl'), array(
@@ -31,7 +42,8 @@ class OAuth2TestVehicle extends \Zotlabs\Web\Controller {
 						)
 					),
 					'oauth2test_create_db',
-					'Create the OAuth2 database tables'
+					'Create the OAuth2 database tables',
+					'POST'
 				),
 				array(
 					'oauth2testvehicle',
@@ -41,7 +53,20 @@ class OAuth2TestVehicle extends \Zotlabs\Web\Controller {
 						)
 					),
 					'oauth2test_delete_db',
-					'Delete the OAuth2 database tables'
+					'Delete the OAuth2 database tables',
+					'POST'
+				),
+				array(
+					'authorize',
+					array(
+						array('response_type', 'code'),
+						array('client_id', urlencode('test_app_client_id')),
+						array('redirect_uri', urlencode('http://hub.localhost/oauth2testvehicle')),
+						array('state', 'xyz')
+					),
+					'oauth_authorize',
+					'Authorize a test client app',
+					'GET'
 				)
 			)
 		));
@@ -53,6 +78,7 @@ class OAuth2TestVehicle extends \Zotlabs\Web\Controller {
 
 		logger(json_encode($_POST), LOGGER_DEBUG);
 
+
 		switch ($_POST['action']) {
 
 			case 'delete_db':
@@ -64,7 +90,7 @@ class OAuth2TestVehicle extends \Zotlabs\Web\Controller {
 				logger('Deleting existing database tables...', LOGGER_DEBUG);
 				foreach ($storage->getConfig() as $key => $table) {
 					logger('Deleting table ' . dbesc($table), LOGGER_DEBUG);
-					$r = q("DROP TABLE IF EXISTS %s;", dbesc($table));
+					$r = q("DROP TABLE %s;", dbesc($table));
 					if (!$r) {
 						logger('Errors encountered deleting database table ' . $table . '.', LOGGER_DEBUG);
 						$status = false;

view/tpl/oauth2testvehicle.tpl

@@ -2,7 +2,7 @@
 
 {{foreach $endpoints as $ept}}
 <div class="oath2test-form-box">
-<form action="{{$baseurl}}/{{$ept.0}}" method="post">
+<form action="{{$baseurl}}/{{$ept.0}}" method="{{$ept.4}}">
 	<h3>{{$ept.3}}</h3>
 	<p>{{$baseurl}}/{{$ept.0}}/?{{foreach $ept.1 as $field}}{{$field.0}}={{$field.1}}&<input type="hidden" name="{{$field.0}}" value="{{$field.1}}" />{{/foreach}}
 	</p>

view/tpl/oauth_authorize.tpl

@@ -3,8 +3,14 @@
 <div class='oauthapp'>
 	<img src='{{$app.icon}}'>
 	<h4>{{$app.name}}</h4>
-</div>
 	<h3>{{$authorize}}</h3>
 	<form method="POST">
-<div class="settings-submit-wrapper"><input  class="settings-submit"  type="submit" name="oauth_yes" value="{{$yes}}" /></div>
+	<div class="settings-submit-wrapper">
+		<input type="hidden" name="client_id" value="{{$client_id}}" />
+		<input type="hidden" name="redirect_uri" value="{{$redirect_uri}}" />
+		<input type="hidden" name="state" value="{{$state}}" />
+		<button class="btn btn-lg btn-danger" name="authorize" value="deny" type="submit">{{$no}}</button>
+		<button class="btn btn-lg btn-success" name="authorize" value="allow" type="submit">{{$yes}}</button>
+	</div>
 	</form>
+</div>