generalize authentication handling

Signed-off-by: Florian Pritz <bluewind@xinu.at>

6 files changed, 50 insertions, 13 deletions

diff --git a/application/exceptions/ApiException.php b/application/exceptions/ApiException.php
index b288bbaa2..b3b9decff 100644
--- a/application/exceptions/ApiException.php
+++ b/application/exceptions/ApiException.php
@@ -27,4 +27,9 @@ class ApiException extends \Exception {
 	{
 		return $this->data;
 	}
+
+	public function get_http_error_code()
+	{
+		return 500;
+	}
 }
diff --git a/application/exceptions/InsufficientPermissionsException.php b/application/exceptions/InsufficientPermissionsException.php
new file mode 100644
index 000000000..a036edf9d
--- /dev/null
+++ b/application/exceptions/InsufficientPermissionsException.php
@@ -0,0 +1,14 @@
+<?php
+/*
+ * Licensed under AGPLv3
+ * (see COPYING for full license text)
+ *
+ */
+namespace exceptions;
+
+class InsufficientPermissionsException extends UserInputException {
+	public function get_http_error_code()
+	{
+		return 403;
+	}
+}
diff --git a/application/exceptions/NotAuthenticatedException.php b/application/exceptions/NotAuthenticatedException.php
new file mode 100644
index 000000000..de26318d8
--- /dev/null
+++ b/application/exceptions/NotAuthenticatedException.php
@@ -0,0 +1,14 @@
+<?php
+/*
+ * Licensed under AGPLv3
+ * (see COPYING for full license text)
+ *
+ */
+namespace exceptions;
+
+class NotAuthenticatedException extends UserInputException {
+	public function get_http_error_code()
+	{
+		return 401;
+	}
+}
diff --git a/application/exceptions/UserInputException.php b/application/exceptions/UserInputException.php
index 150d0204b..d4c327315 100644
--- a/application/exceptions/UserInputException.php
+++ b/application/exceptions/UserInputException.php
@@ -7,4 +7,8 @@
 namespace exceptions;
 
 class UserInputException extends PublicApiException {
+	public function get_http_error_code()
+	{
+		return 400;
+	}
 }
diff --git a/application/models/muser.php b/application/models/muser.php
index ffcc5f6b3..fb8abad8b 100644
--- a/application/models/muser.php
+++ b/application/models/muser.php
@@ -160,14 +160,14 @@ class Muser extends CI_Model {
 		$have = array_search($session_level, $this->access_levels);
 
 		if ($wanted === false || $have === false) {
-			show_error("Failed to determine access level");
+			throw new \exceptions\PublicApiException("api/invalid-accesslevel", "Failed to determine access level");
 		}
 
 		if ($have >= $wanted) {
-			return true;
+			return;
 		}
 
-		show_error("Access denied: Access level too low", 403);
+		throw new \exceptions\InsufficientPermissionsException("api/insufficient-permissions", "Access denied: Access level too low");
 	}
 
 	function require_access($wanted_level = "full")
@@ -184,17 +184,15 @@ class Muser extends CI_Model {
 			return $this->check_access_level($wanted_level);
 		}
 
-		if (!stateful_client()) {
-			show_error("Not authenticated. FileBin requires you to have an account, please go to the homepage for more information.\n", 401);
+		if (stateful_client()) {
+			// desktop clients get redirected to the login form
+			$this->require_session();
+			if (!$this->session->userdata("flash:new:uri")) {
+				$this->session->set_flashdata("uri", $this->uri->uri_string());
+			}
 		}
 
-		// desktop clients get redirected to the login form
-		$this->require_session();
-		if (!$this->session->userdata("flash:new:uri")) {
-			$this->session->set_flashdata("uri", $this->uri->uri_string());
-		}
-		redirect('user/login');
-		exit();
+		throw new \exceptions\NotAuthenticatedException("api/not-authenticated", "Not authenticated. FileBin requires you to have an account, please go to the homepage for more information.");
 	}
 
 	function username_exists($username)
diff --git a/index.php b/index.php
index 21d3ffc04..051e76de6 100644
--- a/index.php
+++ b/index.php
@@ -307,8 +307,10 @@ register_shutdown_function("check_for_fatal");
  */
 try {
 	require_once BASEPATH.'core/CodeIgniter.php';
+} catch (\exceptions\NotAuthenticatedException $e) {
+	redirect("user/login");
 } catch (\exceptions\UserInputException $e) {
-	show_error(nl2br(htmlspecialchars($e->__toString())), 400);
+	show_error(nl2br(htmlspecialchars($e->__toString())), $e->get_http_error_code());
 }
 
 /* End of file index.php */