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

[Steve Hu]

Cool. Thanks a lot for your help.

On Mon, Sep 18, 2017 at 8:22 AM, Stuart Douglas <sdouglas at redhat.com> wrote:

> Have a look at io.undertow.server.Connectors#ungetRequestBytes(), it
> should do what you are after.
>
> Stuart
>
> On Mon, Sep 18, 2017 at 12:50 PM, Steve Hu <stevehu at gmail.com> wrote:
> > 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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