fix(router): check if Accept header is set before getting value

fix deprecation warnings for getHeader and getHeaders methods

refs #228

app/Helpers/media_helper.php

@@ -69,7 +69,7 @@ if (! function_exists('download_file')) {
                 true,
             )
         ) {
-            $newFileUrl = trim($response->getHeader('location')->getValue());
+            $newFileUrl = trim($response->header('location')->getValue());
             $response = $client->get($newFileUrl, [
                 'headers' => [
                     'User-Agent' => 'Castopod/' . CP_VERSION,

app/Libraries/Router.php

@@ -110,7 +110,12 @@ class Router extends CodeIgniterRouter
                     $request = Services::request();
                     $negotiate = Services::negotiator();
 
-                    $acceptHeader = $request->getHeader('Accept')
+                    // Accept header is mandatory
+                    if ($request->header('Accept') === null) {
+                        break;
+                    }
+
+                    $acceptHeader = $request->header('Accept')
                         ->getValue();
                     $parsedHeader = $negotiate->parseHeader($acceptHeader);
 

app/Views/errors/html/error_exception.php

@@ -272,7 +272,7 @@ $error_id = uniqid('error', true); ?>
 
 				<?php endif; ?>
 
-				<?php $headers = $request->getHeaders(); ?>
+				<?php $headers = $request->headers(); ?>
 				<?php if (! empty($headers)) : ?>
 
 					<h3>Headers</h3>
@@ -320,7 +320,7 @@ $error_id = uniqid('error', true); ?>
 					</tr>
 				</table>
 
-				<?php $headers = $response->getHeaders(); ?>
+				<?php $headers = $response->headers(); ?>
 				<?php if (! empty($headers)) : ?>
 					<?php natsort($headers) ?>