Merge pull request #263 from ankadada/master

add ucwordsHyphen

Author: jemygraw

src/Qiniu/Http/Client.php

@@ -129,7 +129,7 @@ private static function parseHeaders($raw)
             $headerLine = trim($line);
             $kv = explode(':', $headerLine);
             if (count($kv) > 1) {
-                $kv[0] = ucwords($kv[0], '-');
+                $kv[0] =self::ucwordsHyphen($kv[0]);
                 $headers[$kv[0]] = trim($kv[1]);
             }
         }
@@ -142,4 +142,9 @@ private static function escapeQuotes($str)
         $replace = array("\\\\", "\\\"");
         return str_replace($find, $replace, $str);
     }
+    
+    private static function ucwordsHyphen($str)
+    {
+        return str_replace('- ', '-', ucwords(str_replace('-', '- ', $str)));
+    }
 }