[undertow-dev] HttpServerExchange post data

[Stuart Douglas]

io.undertow.util.StringReadChannelListener is probably the simples example.

Basically the idea is you keep calling read() until it returns 0 (or -1 
if the stream is done), then when it returns 0 you call

channel.getReadSetter().set(myReadListener)
channel.resumeReads()

your listener will be notified when more data is available and you can 
attempt to read again.

We have been talking about adding some kind of simpler async reader API, 
however we are not sure yet exactly what form this will take.

Stuart

Mike Stefaniak wrote:
> I ended up dispatching to a worker thread and using input stream. I do
> need access to the raw post data. Do you have an example of how to use
> channel so I could try it for comparison sake?
>
> On Tue, Jan 6, 2015 at 12:07 AM, Stuart Douglas <sdouglas at redhat.com
> <mailto:sdouglas at redhat.com>> wrote:
>
>     By second method do you mean the input stream or the parsers?
>
>     If you just want form data just use the built in parsers, if you
>     need access to the raw bytes then you need the input stream or the
>     channel. The channel lets you use non-blocking IO which can perform
>     better, however it is a bit harder to use that the input stream as
>     you need to register callbacks.
>
>     Stuart
>
>     ----- Original Message -----
>     >  From: "Mike Stefaniak" <mstefaniak at choicestream.com
>     <mailto:mstefaniak at choicestream.com>>
>      > To: "Stuart Douglas" <sdouglas at redhat.com
>     <mailto:sdouglas at redhat.com>>
>      > Cc: undertow-dev at lists.jboss.org
>     <mailto:undertow-dev at lists.jboss.org>
>      > Sent: Tuesday, 6 January, 2015 3:26:30 PM
>      > Subject: Re: [undertow-dev] HttpServerExchange post data
>      >
>      > Thanks, I ended up figuring out how to do the second method you
>     listed. Is
>      > there any advantage to one verse the other?
>      >
>      > On Sun, Jan 4, 2015 at 6:19 PM, Stuart Douglas
>     <sdouglas at redhat.com <mailto:sdouglas at redhat.com>> wrote:
>      >
>      > > If you just want access to the raw data you have a 2 options:
>      > >
>      > > HttpServerExchange.getRequestChannel()
>      > > HttpServerExchange.getInputStream() (exchange should have
>     startBlocking
>      > > called, and you need to dispatch to a worker thread so as not
>     to block an
>      > > IO thread)
>      > >
>      > > If you want access to parsed form/multipart data then you can use
>      > > io.undertow.server.handlers.form.EagerFormParsingHandler, and
>     the use
>      > > exchange.gutAttachment(FormDataParser.FORM_DATA) to get access
>     to the
>      > > parsed data.
>      > >
>      > > Stuart
>      > >
>      > >
>      > > ----- Original Message -----
>      > > > From: "Mike Stefaniak" <mstefaniak at choicestream.com
>     <mailto:mstefaniak at choicestream.com>>
>      > > > To: undertow-dev at lists.jboss.org
>     <mailto:undertow-dev at lists.jboss.org>
>      > > > Sent: Friday, 2 January, 2015 10:32:35 AM
>      > > > Subject: [undertow-dev] HttpServerExchange post data
>      > > >
>      > > > I can't figure out how to get the content of post data
>      > > >
>      > > > My server start
>      > > >
>      > > > Undertow.builder()
>      > > > .addHttpListener(8080, "0.0.0.0")
>      > > > .setHandler(Handlers.routing().post("/bid", new BidHandler()))
>      > > > .build()
>      > > > .start();
>      > > >
>      > > > And the handler class
>      > > >
>      > > > public final class BidHandler implements HttpHandler {
>      > > >
>      > > > @Override
>      > > > public void handleRequest(final HttpServerExchange exchange)
>     throws
>      > > Exception
>      > > > {
>      > > > ........
>      > > > }
>      > > > }
>      > > >
>      > > >
>      > > > If I make a curl request like so
>      > > >
>      > > > curl -H "Content-Type: application/json" -X POST -i -d '{"some":
>      > > "value"}'
>      > > > http://127.0.0.1:8080/bid
>      > > >
>      > > > It gets to the handler, but I can't figure out to access the
>     post data
>      > > from
>      > > > the request
>      > > >
>      > > > Thanks
>      > > >
>      > > >
>      > > >
>      > > >
>      > > > _______________________________________________
>      > > > undertow-dev mailing list
>      > > > undertow-dev at lists.jboss.org
>     <mailto:undertow-dev at lists.jboss.org>
>      > > > https://lists.jboss.org/mailman/listinfo/undertow-dev
>      > >
>      >
>
>