fix(detectfromheader): #6 update check on accept header when not present

Author: thepercival

composer.json

@@ -26,10 +26,10 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^8.1",
-        "zendframework/zend-diactoros": "^2.0.1",
         "friendsofphp/php-cs-fixer": "^2.0",
         "oscarotero/php-cs-fixer-config": "^1.0",
-        "squizlabs/php_codesniffer": "^3.0"
+        "squizlabs/php_codesniffer": "^3.0",
+        "laminas/laminas-diactoros": "^2.2"
     },
     "autoload": {
         "psr-4": {

src/ContentType.php

@@ -186,8 +186,11 @@ private function detectFromExtension(ServerRequestInterface $request): ?string
      */
     private function detectFromHeader(ServerRequestInterface $request): ?string
     {
+        if (!$request->hasHeader('Accept')) {
+            return $this->defaultFormat;
+        }
         $headers = call_user_func_array('array_merge', array_column($this->formats, 'mime-type'));
-        $accept = $request->getHeaderLine('Accept')?: '*/*';
+        $accept = $request->getHeaderLine('Accept');
         $mime = $this->negotiateHeader($accept, new Negotiator(), $headers);
 
         if ($mime !== null) {