Don't use DefaultHttpHeaders(validateHeaders = false)

Not sure if this is an issue here as those are internal copies use shouldn't have access to, but you never know...

Author: slandelle

client/src/main/java/org/asynchttpclient/netty/handler/intercept/ProxyUnauthorized407Interceptor.java

@@ -81,7 +81,7 @@ public boolean exitAfterHandling407(//
 
         // FIXME what's this???
         future.setChannelState(ChannelState.NEW);
-        HttpHeaders requestHeaders = new DefaultHttpHeaders(false).add(request.getHeaders());
+        HttpHeaders requestHeaders = new DefaultHttpHeaders().add(request.getHeaders());
 
         switch (proxyRealm.getScheme()) {
         case BASIC:

client/src/main/java/org/asynchttpclient/netty/handler/intercept/Unauthorized401Interceptor.java

@@ -82,7 +82,7 @@ public boolean exitAfterHandling401(//
 
         // FIXME what's this???
         future.setChannelState(ChannelState.NEW);
-        HttpHeaders requestHeaders = new DefaultHttpHeaders(false).add(request.getHeaders());
+        HttpHeaders requestHeaders = new DefaultHttpHeaders().add(request.getHeaders());
 
         switch (realm.getScheme()) {
         case BASIC:

client/src/main/java/org/asynchttpclient/netty/request/NettyRequestSender.java

@@ -373,7 +373,7 @@ public <T> void writeRequest(NettyResponseFuture<T> future, Channel channel) {
     }
 
     private void configureTransferAdapter(AsyncHandler<?> handler, HttpRequest httpRequest) {
-        HttpHeaders h = new DefaultHttpHeaders(false).set(httpRequest.headers());
+        HttpHeaders h = new DefaultHttpHeaders().set(httpRequest.headers());
         TransferCompletionHandler.class.cast(handler).headers(h);
     }