CODEWITHSUNDEEP
c#postmangrpcvisual-studio-2022
inliner49er
inliner49er

Reputation: 1450

Using Postman with gRPC

I've got the following "hello world" gRPC serivice working in a c#, VS 2022 console client calling both http and https endpoints; but I get errors when using Postman for Windows (ver 9.21.3) calling the same endpoints.

proto:

service Greeter {
  // Sends a greeting
  rpc SayHello (HelloRequest) returns (HelloReply);
}

// The request message containing the user's name.
message HelloRequest {
  string name = 1;
}

// The response message containing the greetings.
message HelloReply {
  string message = 1;
}

post http://localhost:5046/Greeter/SayHello

body > raw > {"Name" : "testing grpc http"}

postman response -> "Parse Error: The server returned a malformed response"

postman console -> "Error: Parse Error: Expected HTTP/" c# grpc server console -> none

post https://localhost:7046/Greeter/SayHello

body > raw > {"Name" : "testing grpc HTTPS"} postman response -> "Error: socket hang up"

c# grpc server console -> "HTTP/2 over TLS was not negotiated on an HTTP/2-only endpoint."

Anyone having success with the c#/VS2022/Postman stack?

UPDATE

I'm now creating my request via the link posted by @LaurentGabiot here: https://blog.postman.com/postman-now-supports-grpc/

and am now getting the same error for both of my http/https endpoints:

"Error: Invalid protocol: https"

In their sample, their endpoints are: "grpcb.in:9000" whatever that means. Not sure how to do that in Vs2022/c#.

Note: I'm leaving my original errors (above) in case someone else creates their request the same way that I did.

Upvotes: 2

Views: 5819

Answers (1)

Hakan Yildizhan
Hakan Yildizhan

Reputation: 182

Just type the URL without scheme as the server URL, i.e. localhost:5046.

Upvotes: 2

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