ServerStreamingServerCallHandler.cs

#region Copyright notice and license

// Copyright 2019 The gRPC Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#endregion

using System.Diagnostics.CodeAnalysis;
using Grpc.Shared.Server;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;

namespace Grpc.AspNetCore.Server.Internal.CallHandlers;

internal class ServerStreamingServerCallHandler<TRequest, TResponse> : ServerCallHandlerBase<TRequest, TResponse>
    where TRequest : class
    where TResponse : class
{
    private readonly ServerStreamingServerMethodInvoker<TRequest, TResponse> _invoker;

    public ServerStreamingServerCallHandler(
        ServerStreamingServerMethodInvoker<TRequest, TResponse> invoker,
        ILoggerFactory loggerFactory)
        : base(invoker, loggerFactory)
    {
        _invoker = invoker;
    }

    protected override async Task HandleCallAsyncCore(HttpContext httpContext, HttpContextServerCallContext serverCallContext)
    {
        // Decode request
        var request = await httpContext.Request.BodyReader.ReadSingleMessageAsync<TRequest>(serverCallContext, MethodInvoker.Method.RequestMarshaller.ContextualDeserializer);

        var streamWriter = new HttpContextStreamWriter<TResponse>(serverCallContext, MethodInvoker.Method.ResponseMarshaller.ContextualSerializer);
        try
        {
            await _invoker.Invoke(httpContext, serverCallContext, request, streamWriter);
        }
        finally
        {
            streamWriter.Complete();
        }
    }
}

internal class ServerStreamingServerCallHandler<[DynamicallyAccessedMembers(GrpcProtocolConstants.ServiceAccessibility)]TService, TRequest, TResponse> : ServerCallHandlerBase<TService, TRequest, TResponse>
    where TRequest : class
    where TResponse : class
    where TService : class
{
    private readonly ServerStreamingServerMethodInvoker<TService, TRequest, TResponse> _invoker;

    public ServerStreamingServerCallHandler(
        ServerStreamingServerMethodInvoker<TService, TRequest, TResponse> invoker,
        ILoggerFactory loggerFactory)
        : base(invoker, loggerFactory)
    {
        _invoker = invoker;
    }

    protected override async Task HandleCallAsyncCore(HttpContext httpContext, HttpContextServerCallContext serverCallContext)
    {
        // Disable certain features for server streaming methods.
#if NET8_0_OR_GREATER
        DisableRequestTimeout(httpContext);
#endif

        // Decode request
        var request = await httpContext.Request.BodyReader.ReadSingleMessageAsync<TRequest>(serverCallContext, MethodInvoker.Method.RequestMarshaller.ContextualDeserializer);

        var streamWriter = new HttpContextStreamWriter<TResponse>(serverCallContext, MethodInvoker.Method.ResponseMarshaller.ContextualSerializer);
        try
        {
            await _invoker.Invoke(httpContext, serverCallContext, request, streamWriter);
        }
        finally
        {
            streamWriter.Complete();
        }
    }
}