Merge pull request graphql-java-kickstart#206 from t2gran/fix-mark-not-set

Fix graphql-java-kickstart#205 java.io.IOException: Mark not set

Author: oliemansm

src/main/java/graphql/servlet/AbstractGraphQLHttpServlet.java

@@ -454,11 +454,12 @@ private boolean isBatchedQuery(InputStream inputStream) throws IOException {
  return false;
  }
 
+ final int BUFFER_SIZE = 128;
  ByteArrayOutputStream result = new ByteArrayOutputStream();
- byte[] buffer = new byte[128];
+ byte[] buffer = new byte[BUFFER_SIZE];
  int length;
 
- inputStream.mark(0);
+ inputStream.mark(BUFFER_SIZE);
  while ((length = inputStream.read(buffer)) != -1) {
  result.write(buffer, 0, length);
  String chunk = result.toString();