Always return json for api requests (librenms#12335)

even if the client does not properly request it

Author: murrant

app/Http/Kernel.php

@@ -53,6 +53,7 @@ class Kernel extends HttpKernel
         ],
 
         'api' => [
+            \App\Http\Middleware\EnforceJson::class,
             \Illuminate\Routing\Middleware\SubstituteBindings::class,
             'authenticate:token',
         ],

app/Http/Middleware/EnforceJson.php

@@ -0,0 +1,45 @@
+<?php
+/*
+ * EnforceJson.php
+ *
+ * -Description-
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package    LibreNMS
+ * @link       http://librenms.org
+ * @copyright  2020 Tony Murray
+ * @author     Tony Murray <[email protected]>
+ */
+
+namespace App\Http\Middleware;
+
+use Closure;
+
+class EnforceJson
+{
+    /**
+     * Enforce json
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        $request->headers->set('Accept', 'application/json');
+
+        return $next($request);
+    }
+}

html/api_v0.php

@@ -1,59 +1,55 @@
 <?php
 
-/**
- * Laravel - A PHP Framework For Web Artisans
- *
- * @author   Taylor Otwell <[email protected]>
- */
+use Illuminate\Contracts\Http\Kernel;
+use Illuminate\Http\Request;
+
+define('LARAVEL_START', microtime(true));
 
 /*
 |--------------------------------------------------------------------------
-| Register The Auto Loader
+| Check If Application Is Under Maintenance
 |--------------------------------------------------------------------------
 |
-| Composer provides a convenient, automatically generated class loader for
-| our application. We just need to utilize it! We'll simply require it
-| into the script here so that we don't have to worry about manual
-| loading any of our classes later on. It feels great to relax.
+| If the application is maintenance / demo mode via the "down" command we
+| will require this file so that any prerendered template can be shown
+| instead of starting the framework, which could cause an exception.
 |
 */
 
-require __DIR__ . '/../vendor/autoload.php';
+if (file_exists(__DIR__ . '/../storage/framework/maintenance.php')) {
+    require __DIR__ . '/../storage/framework/maintenance.php';
+}
 
 /*
 |--------------------------------------------------------------------------
-| Turn On The Lights
+| Register The Auto Loader
 |--------------------------------------------------------------------------
 |
-| We need to illuminate PHP development, so let us turn on the lights.
-| This bootstraps the framework and gets it ready for use, then it
-| will load up this application so that we can run it and send
-| the responses back to the browser and delight our users.
+| Composer provides a convenient, automatically generated class loader for
+| this application. We just need to utilize it! We'll simply require it
+| into the script here so we don't need to manually load our classes.
 |
 */
 
-$app = require_once __DIR__ . '/../bootstrap/app.php';
+require __DIR__ . '/../vendor/autoload.php';
 
 /*
 |--------------------------------------------------------------------------
 | Run The Application
 |--------------------------------------------------------------------------
 |
-| Once we have the application, we can handle the incoming request
-| through the kernel, and send the associated response back to
-| the client's browser allowing them to enjoy the creative
-| and wonderful application we have prepared for them.
+| Once we have the application, we can handle the incoming request using
+| the application's HTTP kernel. Then, we will send the response back
+| to this client's browser, allowing them to enjoy our application.
 |
 */
 
-$kernel = $app->make(Illuminate\Contracts\Http\Kernel::class);
-
-$_SERVER['HTTP_ACCEPT'] = 'application/json'; // force json accepted
+$app = require_once __DIR__ . '/../bootstrap/app.php';
 
-$response = $kernel->handle(
-    $request = Illuminate\Http\Request::capture()
-);
+$kernel = $app->make(Kernel::class);
 
-$response->send();
+$response = tap($kernel->handle(
+    $request = Request::capture()
+))->send();
 
 $kernel->terminate($request, $response);