[undertow-dev] reverse proxy doesn't work for post request

[Steve Hu]

Thanks Stuart. My bad :( I had a body parser handler in the
request/response chain in order to do schema validation on body against
swagger specification and it consumed the body stream on the proxy server.
Is there a way I can consume the body and put the body stream back so that
other downstream handler can still parse the body if needed?

Steve

On Mon, Sep 18, 2017 at 1:13 AM, Stuart Douglas <sdouglas at redhat.com> wrote:

> This looks really odd. It looks like the client request is expecting
> there to be a request body, however the server request thinks the
> request is finished and there is no request body available. Is it
> possible an earlier handler is reading the request body so the proxy
> handler can't access it?
>
> Stuart
>
> On Sat, Sep 16, 2017 at 8:37 PM, Steve Hu <stevehu at gmail.com> wrote:
> > Hi,
> >
> > I am trying to build a RESTful reverse proxy in order to wrap up APIs
> built
> > with other Java frameworks or other languages. The codebase is copied
> from
> > the reverse proxy example and I have a tutorial to document the steps to
> > reproduce the error. I am just wondering if there are anything I missed
> or
> > this is a bug.
> >
> > Thanks,
> >
> > Steve
> >
> > Here the tutorial
> >
> > https://networknt.github.io/light-proxy/tutorial/
> >
> > And here is the error
> >
> > 14:04:03.357 [XNIO-1 I/O-1]   ERROR io.undertow.proxy handleFailure -
> > UT005028: Proxy request to /v1/postData failed
> > io.undertow.server.TruncatedResponseException: null
> > at
> > io.undertow.client.http.HttpRequestConduit.truncateWrites(
> HttpRequestConduit.java:711)
> > at
> > io.undertow.conduits.AbstractFixedLengthStreamSinkC
> onduit.terminateWrites(AbstractFixedLengthStreamSinkConduit.java:256)
> > at
> > org.xnio.conduits.ConduitStreamSinkChannel.shutdownWrites(
> ConduitStreamSinkChannel.java:178)
> > at
> > io.undertow.channels.DetachableStreamSinkChannel.shutdownWrites(
> DetachableStreamSinkChannel.java:79)
> > at
> > io.undertow.server.handlers.proxy.ProxyHandler$
> HTTPTrailerChannelListener.handleEvent(ProxyHandler.java:736)
> > at
> > io.undertow.server.handlers.proxy.ProxyHandler$ProxyAction$1.completed(
> ProxyHandler.java:628)
> > at
> > io.undertow.server.handlers.proxy.ProxyHandler$ProxyAction$1.completed(
> ProxyHandler.java:543)
> > at
> > io.undertow.client.http.HttpClientExchange.invokeReadReadyCallback(
> HttpClientExchange.java:212)
> > at
> > io.undertow.client.http.HttpClientConnection.initiateRequest(
> HttpClientConnection.java:418)
> > at
> > io.undertow.client.http.HttpClientConnection.sendRequest(
> HttpClientConnection.java:350)
> > at
> > io.undertow.server.handlers.proxy.ProxyHandler$
> ProxyAction.run(ProxyHandler.java:543)
> > at io.undertow.util.SameThreadExecutor.execute(
> SameThreadExecutor.java:35)
> > at
> > io.undertow.server.HttpServerExchange.dispatch(
> HttpServerExchange.java:797)
> > at
> > io.undertow.server.handlers.proxy.ProxyHandler$
> ProxyClientHandler.completed(ProxyHandler.java:298)
> > at
> > io.undertow.server.handlers.proxy.ProxyHandler$
> ProxyClientHandler.completed(ProxyHandler.java:272)
> > at
> > io.undertow.server.handlers.proxy.ProxyConnectionPool.connectionReady(
> ProxyConnectionPool.java:338)
> > at
> > io.undertow.server.handlers.proxy.ProxyConnectionPool.access$900(
> ProxyConnectionPool.java:61)
> > at
> > io.undertow.server.handlers.proxy.ProxyConnectionPool$2.
> completed(ProxyConnectionPool.java:286)
> > at
> > io.undertow.server.handlers.proxy.ProxyConnectionPool$2.
> completed(ProxyConnectionPool.java:273)
> > at
> > io.undertow.client.http.HttpClientProvider.handleConnected(
> HttpClientProvider.java:156)
> > at
> > io.undertow.client.http.HttpClientProvider.access$000(
> HttpClientProvider.java:51)
> > at
> > io.undertow.client.http.HttpClientProvider$2.handleEvent(
> HttpClientProvider.java:127)
> > at
> > io.undertow.client.http.HttpClientProvider$2.handleEvent(
> HttpClientProvider.java:124)
> > at org.xnio.ChannelListeners.invokeChannelListener(
> ChannelListeners.java:92)
> > at
> > org.xnio.nio.WorkerThread$ConnectHandle.handleReady(
> WorkerThread.java:326)
> > at org.xnio.nio.WorkerThread.run(WorkerThread.java:561)
> > 14:05:03.462 [XNIO-1 I/O-1]   ERROR io.undertow.proxy handleFailure -
> > UT005028: Proxy request to /v1/postData failed
> > java.io.IOException: UT001000: Connection closed
> > at
> > io.undertow.client.http.HttpClientConnection$ClientReadListener.
> handleEvent(HttpClientConnection.java:573)
> > at
> > io.undertow.client.http.HttpClientConnection$ClientReadListener.
> handleEvent(HttpClientConnection.java:511)
> > at org.xnio.ChannelListeners.invokeChannelListener(
> ChannelListeners.java:92)
> > at
> > org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.
> readReady(ReadReadyHandler.java:66)
> > at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:88)
> > at org.xnio.nio.WorkerThread.run(WorkerThread.java:561)
> >
> >
> >
> > _______________________________________________
> > undertow-dev mailing list
> > undertow-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/undertow-dev
>
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