fix the bug where some mf2 JSON requests were not parsed correctly

lib/XRay/Parser.php

@@ -83,7 +83,7 @@ class Parser {
     $body = $http_response['body'];
 
     // Check if an mf2 JSON object was passed in
-    if(is_array($body) && isset($body['items']) && isset($body['rels']) && isset($body['rel-urls'])) {
+    if(is_array($body) && isset($body['items'])) {
       $data = Formats\Mf2::parse($http_response, $this->http, $opts);
       if($data == false) {
         $data = [
@@ -103,17 +103,19 @@ class Parser {
       return $data;
     }
 
-    if(substr($body, 0, 5) == '<?xml') {
+    if(is_string($body) && substr($body, 0, 5) == '<?xml') {
       return Formats\XML::parse($http_response);
     }
 
-    // Some feeds don't start with <?xml
-    $begin = trim(substr($body, 0, 40));
-    if(substr($begin, 0, 4) == '<rss') {
-      return Formats\XML::parse($http_response);
+    if(is_string($body)) {
+      // Some feeds don't start with <?xml
+      $begin = trim(substr($body, 0, 40));
+      if(substr($begin, 0, 4) == '<rss') {
+        return Formats\XML::parse($http_response);
+      }
     }
 
-    if(substr($body, 0, 1) == '{') {
+    if(is_string($body) && substr($body, 0, 1) == '{') {
       $parsed = json_decode($body, true);
       if($parsed && isset($parsed['version']) && $parsed['version'] == 'https://jsonfeed.org/version/1') {
         $http_response['body'] = $parsed;

tests/ParseTest.php

@@ -878,6 +878,30 @@ class ParseTest extends PHPUnit_Framework_TestCase {
     $this->assertEquals('http://one.example.com/test', $data['data']['url']);
   }
 
+  public function testInputIsJSON() {
+    $url = 'http://example.com/entry';
+
+    $mf2json = ['items' => [
+      [
+        'type' => ['h-entry'],
+        'properties' => [
+          'content' => [['html' => 'Hello World']]
+        ]
+      ]
+    ]];
+
+    $response = $this->parse([
+      'body' => $mf2json,
+      'url' => $url,
+    ]);
+
+    $body = $response->getContent();
+    $data = json_decode($body, true);
+
+    $this->assertEquals('mf2+json', $data['source-format']);
+    $this->assertEquals('Hello World', $data['data']['content']['text']);
+  }
+
   public function testInputIsParsedMf2() {
     $html = '<div class="h-entry"><p class="p-content p-name">Hello World</p><img src="/photo.jpg"></p></div>';
     $mf2 = Mf2\parse($html, 'http://example.com/entry');