UnsupportedWarning: Status message is not supported by HTTP/2 (RFC7540 8.1.2.4)

[khflx]

Hi
I tried to use the koa 2.5.3 framework on http2, but when the client accesses a url that does not exist, it will trigger the "UnsupportedWarning: Status message is not supported by HTTP/2 (RFC7540 8.1.2.4)" warning.
This seems to be because koa is set or gets response.statusMessageRelated source code

Is there any way to solve it?

[fl0w]

Yes and no. Setting the message is done currently so removing that would arguably be breaking.

One could remove setting the message for HTTP/2 but that would require Koa to know what server it's running on - uncool.

We could make it flag-able, e.g. app.statusMessageOn404 = false (working title) with default being set to true. But that's something @dead-horse @jonathanong could pitch in on before I do it.

[edevil]

What if our app is running using both http and http2? Would we need two separate apps with different flag values?

[fl0w]

With that solution, yes. But I agree - it's not elegant.

Sort of off topic but it feels like Koa needs a grand vision on how to support http/2 before an effort is put to fully support it (and I'm probably not the right person to envision that). Specifically how the flow of pushing should be implemented. I almost feel like there needs to be another level of abstraction between Koa and server to keep Koa agnostic (without going if http1 {} else if http2 {} all over the place).

[ddtramp]

use spdy package should be ok
npm install spdy -SE

const server = spdy.createServer(options, app.callback())
server.listen(443)

[ddtramp]

do not use http2 module in the nodejs core, use spdy

node node:8.12.0-jessie

[fl0w]

Solved by #1264