Re: Making HTTP2 requests

Daniel Stenberg via curl-users <[email protected]> Sat, 15 Jul 2023 13:53:50 +0200 (CEST)

Newsgroups	gmane.comp.web.curl.general
Message-ID	<[email protected]>

On Fri, 14 Jul 2023, Luke Schlather via curl-users wrote:

> I am attempting to test a local .NET Kestrel server which only accepts
> http2 requests. However it seems that even when I specify --http2 it sends
> http1 requests.
>
>> curl --http2 -i http://localhost:5000/health

Doing HTTP/2 with a HTTP:// URL scheme means that curl makes a HTTP/1 request 
with an upgrade header.

>> curl --http2-prior-knowledge -i http://localhost:5000/health
> HTTP/1.1 400 Bad Request
> Connection: close
> Content-Type: text/plain
> Content-Length: 56
>
> An HTTP/1.x request was sent to an HTTP/2 only endpoint.

This is unexpected. Are you sure your curl supports HTTP/2 ?

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