Add Content-Type response header for JSON responses

Initial work in #90

Signed-off-by: Benjamin Gaussorgues <[email protected]>

Author: Altahrim

index.web.php

@@ -54,6 +54,7 @@ public function isAuthenticated(): bool {
 	if (isset($_POST['step'])) {
 		// mark step as failed
 		http_response_code(500);
+		header('Content-Type: application/json');
 		echo(json_encode(['proceed' => false, 'response' => $e->getMessage()]));
 		die();
 	}
@@ -140,6 +141,7 @@ public function isAuthenticated(): bool {
 				break;
 		}
 		$updater->endStep($step);
+		header('Content-Type: application/json');
 		echo(json_encode(['proceed' => true]));
 	} catch (UpdateException $e) {
 		$data = $e->getData();
@@ -155,6 +157,7 @@ public function isAuthenticated(): bool {
 			$updater->rollbackChanges($step);
 		}
 		http_response_code(500);
+		header('Content-Type: application/json');
 		echo(json_encode(['proceed' => false, 'response' => $data]));
 	} catch (\Exception $e) {
 		$message = $e->getMessage();
@@ -170,6 +173,7 @@ public function isAuthenticated(): bool {
 			$updater->rollbackChanges($step);
 		}
 		http_response_code(500);
+		header('Content-Type: application/json');
 		echo(json_encode(['proceed' => false, 'response' => $message]));
 	}