Grpc ,The server cannot be accessed
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david smith
Jul 16, 2020, 12:16:10 AM7/16/20
to grpc.io
The client call reported such an error ： Request protocol 'HTTP/1.1' is not supported.
But, I did,"Kestrel": {
"EndpointDefaults": {
"Protocols": "Http2"
}
},
i do not know why.who could help me?
Jan Tattermusch
Jul 23, 2020, 7:14:50 AM7/23/20
to grpc.io
Without proper information on how to reproduce the problem (e.g. sharing a minimal reproduction as e.g. a github repository), it's not really possible to help. You're project is probably misconfigured in some way, but there's not enough information to be able to tell what's wrong. I suggest comparing the code you have with the official examples in grpc/grpc-dotnet and perhaps you'll be able to find the issue.
Mya Pitzeruse
Jul 23, 2020, 10:52:37 AM7/23/20
to Jan Tattermusch, grpc.io
Hey David,
What language are you working with and where is your server running?
It's likely your connection is being downgraded by middleware (like Cloudflare, AWS application load balancers, nginx, etc). gRPC requires HTTP/2 all the way through to the server, and in some cases some additional configuration. For example, the nginix Kubernetes ingress controller requires additional annotations to terminate TLS and swap over to cleartext (if terminating at the edge).
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Mya Pitzeruse
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