c# - Calling gRPC Server from Python Client

Question

I have to create a Python Flask Service which loads an image from an URL and sends it to a C# GRPC Service. Both services have to run in Docker later. For now, I just want to run them on localhost. The server requires no authorization or credentials.

Now to my problem: My Python Client can't connect to my C# Server. I have tried switching the port, changing the IP adress, using an insecure and secure channel. This is my Python client code:

request = pb2.UploadDataRequest(FileType=filetype, data=data)
with grpc.insecure_channel('localhost:5001') as channel:
    stub = pb2_grpc.BlobStorageStub(channel)
    result = stub.Upload(request)

My C# Server runs on localhost:5001:

"applicationUrl": "https://localhost:5001",

This is my proto file:

syntax = "proto3";

option csharp_namespace = "GrpcGreeterClient";

package greet;

service BlobStorage {
  rpc Download (DownloadDataRequest) returns (DownloadDataResult);
  rpc Upload (UploadDataRequest) returns (UploadDataResult);
}

message DownloadDataRequest {
    string FileId = 1;
}

message DownloadDataResult {
    string FileType = 1;
    bytes data = 2;
}

message UploadDataRequest {
    string FileType = 1;
    bytes data = 2;
}

message UploadDataResult {
    string FileId = 1;
}

Both Services run on Windows 10.

I have a C# Test Client that can connect to the server just fine. Every help is appreciated.

question from:https://stackoverflow.com/questions/65920476/calling-grpc-server-from-python-client

Answer 1

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