undertow 1.4.8.Final fix #612

Author: jknack

jooby-undertow/src/main/java/org/jooby/internal/undertow/UndertowHandler.java

@@ -36,6 +36,9 @@
 
 import io.undertow.server.HttpHandler;
 import io.undertow.server.HttpServerExchange;
+import io.undertow.util.HeaderValues;
+import io.undertow.util.Headers;
+import io.undertow.util.Protocols;
 
 public class UndertowHandler implements HttpHandler {
 
@@ -52,6 +55,11 @@ public UndertowHandler(final org.jooby.spi.HttpHandler handler, final Config con
   public void handleRequest(final HttpServerExchange exchange) throws Exception {
 
     if (exchange.isInIoThread()) {
+      HeaderValues upgrade = exchange.getRequestHeaders().get(Headers.UPGRADE);
+      if (upgrade != null && upgrade.contains("h2c")) {
+        // reset protocol
+        exchange.setProtocol(Protocols.HTTP_1_1);
+      }
       exchange.dispatch(this);
       return;
     }