[undertow-dev] Gzip and Proxy

[Martin Andersson]

Hi all,

I've seem to have hit a bug in undertow when combining proxying and gzip.

I'm trying to use undertow as a reverse-proxy and also compressing the
result when clients support it. Undertow-code below.

* Proxying without compressing works fine (curl -v localhost:8099/proxy)
* Compressing content that is not proxied works fine (curl -v --compress
localhost:8099/local)
* Proxy and compression just hangs. Not even headers are received
(curl -v --compress
localhost:8099/proxy)

Trying to debug what's going on I found that the GzipStreamSinkConduit
receives all content but is never flushed.

The call sequence for GzipStreamSinkConduit for proxied content is:
write(ByteBuffer src) - all context from the proxied app is written.
wakeupWrites()
- which basically does nothing. Ends up in
DeflatingStreamSinkConduit.queueWriteListener() which calls any
WriteReadyHandlers but there are none.

Any clues?

My code to setup undertow:

final PathHandler pathHandler = Handlers.path();
pathHandler.addExactPath("/local", new HttpHandler() {
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/plain");
exchange.getResponseSender().send("Hello World"); }
});
pathHandler.addPrefixPath("/proxy",
new ProxyHandler(
new SimpleProxyClientProvider(new URI("http://localhost:8060/menu")),
ResponseCodeHandler.HANDLE_404));

final EncodingHandler handler =
new EncodingHandler(pathHandler, new ContentEncodingRepository()
 .addEncodingHandler("gzip",
 new GzipEncodingProvider(), 50,
Predicates.truePredicate()));

Undertow.builder()
.addHttpListener(8099, "0.0.0.0")
.setHandler(handler)
.build().start();

-- 
Br,
Martin Andersson
Purple Scout AB
+46 732 05 14 01
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/undertow-dev/attachments/20160829/8c974fbd/attachment-0001.html