Merge pull request #1812 from mugdha273/UNDERTOW-2476

[UNDERTOW-2476]-Create a default constant for UndertowOptions.ALLOW_UNKNOWN_PROTOCOLS

Author: fl4via

core/src/main/java/io/undertow/UndertowOptions.java

@@ -275,6 +275,10 @@ public class UndertowOptions {
     @Deprecated(forRemoval = true)
     public static final Option<Boolean> ENABLE_CONNECTOR_STATISTICS = ENABLE_STATISTICS;
 
+    /**
+     * Default value of {@link #ALLOW_UNKNOWN_PROTOCOLS} option.
+     */
+    public static final Boolean DEFAULT_ALLOW_UNKNOWN_PROTOCOLS = false;
 
     /**
      * If unknown protocols should be allowed. The known protocols are:
@@ -285,8 +289,8 @@ public class UndertowOptions {
      * HTTP/2.0
      *
      * If this is false then requests that specify any other protocol will be rejected with a 400
-     *
-     * Defaults to false
+     * <p>
+     * Defaults to {@link #DEFAULT_ALLOW_UNKNOWN_PROTOCOLS}
      */
     public static final Option<Boolean> ALLOW_UNKNOWN_PROTOCOLS = Option.simple(UndertowOptions.class, "ALLOW_UNKNOWN_PROTOCOLS", Boolean.class);
 

core/src/main/java/io/undertow/server/protocol/http/HttpReadListener.java

@@ -99,7 +99,7 @@ final class HttpReadListener implements ChannelListener<ConduitStreamSourceChann
         this.maxEntitySize = connection.getUndertowOptions().get(UndertowOptions.MAX_ENTITY_SIZE, UndertowOptions.DEFAULT_MAX_ENTITY_SIZE);
         this.recordRequestStartTime = connection.getUndertowOptions().get(UndertowOptions.RECORD_REQUEST_START_TIME, false);
         this.requireHostHeader = connection.getUndertowOptions().get(UndertowOptions.REQUIRE_HOST_HTTP11, true);
-        this.allowUnknownProtocols = connection.getUndertowOptions().get(UndertowOptions.ALLOW_UNKNOWN_PROTOCOLS, false);
+        this.allowUnknownProtocols = connection.getUndertowOptions().get(UndertowOptions.ALLOW_UNKNOWN_PROTOCOLS, UndertowOptions.DEFAULT_ALLOW_UNKNOWN_PROTOCOLS);
         int requestParseTimeout = connection.getUndertowOptions().get(UndertowOptions.REQUEST_PARSE_TIMEOUT, -1);
         int requestIdleTimeout = connection.getUndertowOptions().get(UndertowOptions.NO_REQUEST_TIMEOUT, -1);
         if(requestIdleTimeout < 0 && requestParseTimeout < 0) {