Hi everyone is there a way to stream body payload on the ser kotlinlang #http4k

12/11/2018, 1:03 PM

Hi everyone, is there a way to stream body payload on the server side, or at least restrict its size to a same limit without reading it into memory?

12/11/2018, 1:20 PM

is this from the serverside or from the clientside?

12/11/2018, 1:20 PM

server side, we want to protect the server from filling memory

12/11/2018, 1:21 PM

ok - which server are you using?

12/11/2018, 1:21 PM

at the moment just

SunHttp

is this server dependent?

we’ll deploy to AWS Lambda

12/11/2018, 1:22 PM

well not really - but you can, for instance, configure undertow to only accept a certain size of request.

12/11/2018, 1:22 PM

can it be done in http4k as well, or do we need to configure it on the server?

12/11/2018, 1:23 PM

anyway, you can get the stream from incoming request

request.body.stream

12/11/2018, 1:24 PM

We saw it’s already closed when we try to access it in the handler. Is there a size limit of when the request won’t be read immediately?

Thank you for your time!

12/11/2018, 1:25 PM

SunHttp definitely does support request streaming. We've even got a test to prove it..

SunHttpStreamingTest

12/11/2018, 1:25 PM

ok great, thank you very much!

I’ll look into the test 🙂

12/11/2018, 1:26 PM

one danger is that you may be accessing the payload before attempting to read the stream.

doing that WILL pull the contents of the stream into memory -

this often happens when you debug the input using a filter

(we've been caught by it several times!)

12/11/2018, 2:03 PM

yes, it was the debugger !

we moved the breakpoint and it started working 🙂

thank you again

12/11/2018, 3:37 PM