How to send data by writing into output stream?

[Johannes Schneider]

Hey guys,

I want to stream a lot of data. Therefore I'd need an output stream where I can write my data to.

Unfortunately I could not find a way how to get that...

Any ideas?

Thanks,

Johannes

[Edgar Espina]

What type of data is it?

There is support for InputStream:

get("/", () -> {
  InputStream stream = ...;
  return stream;
});

But not for output streams.

[Johannes Schneider]

I want to sent binary data to the client. And I really would like to write the data to the output stream - else I had to keep the data in memory.

The org.jooby.servlet.ServletServletResponse#send() methods use rsp.getOutputStream() which is all I need.

So could you create a way to get a reference to that output stream?

[Edgar Espina]

That is just for Servlet/Jetty, isn't that simple for Netty & Undertow.

Still, think this will be useful. Can you please file this at github?

Thanks

[Victor J. Reventos]

Hi Edgar,

I would love to see this feature. Currently I would like to write directly to the output stream, instead of buffering the full payload in memory. I'm deploying this an environment with very limited memory and I'm using Jooby for routing and marshalling.

What makes it difficult to implement this with Netty & Undertow?

Thanks,

Victor J. Reventos

[Edgar Espina]

Something I'm considering for 2.x

What is the source of your data? Jooby efficiently send data from inputstream or file system.

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edgar

[Victor J. Reventos]

I have some in memory structures tightly packed into arrays. Creating an Object model to serialize it via JSON would create a lot of unnecessary references, which isn't something the current system can withstand.

Hence, I need an API to push data, instead of the current one using InputStream/Reader which is more of pull model.

I can also try to do a PR if necessary.

[Edgar Espina]

Sounds like a good idea and happy to review and merge it.

--

edgar

[Victor J. Reventos]

You mentioned doing this would be difficult for Netty. Why would that be the case? Is there something I'm missing?

[Edgar Espina]

Don't remember :(