从。NET Framework客户端调用gRPC服务器时出现异常

Question

我有一个用。NET核心实现的gRPC服务器，我希望与运行在。NET Framework中的控制台应用程序联系。

class Program
{
    static async Task Main(string[] args)
    {
        
        var input = new MyModel();

        var channel = GrpcChannel.ForAddress("https://localhost:5001");
        var client = new Test.TestClient(channel);

        var reply = await client.SetTestAsync(input);

        Console.ReadLine();
    }
}

class Program
{
    static void Main(string[] args)
    {
        Channel channel = new Channel("https://localhost:5001", ChannelCredentials.Insecure);
        
        var    client = new Test.TestClient(channel);

        MyModel request = new MyModel();

        var reply = client.SetTest(request);

        channel.ShutdownAsync().Wait();


        Console.ReadLine();
    }
}

我在发送请求时得到以下异常：

rpc.core.rpcexception:'statuscode=“不可用”,detail=“DNS解析失败服务:https://localhost:5001”,debugexception=“grpc.core.internal.coreerrordetailexception=”created“：”@1600333768.0550000“,”description“：”解析器瞬态失败“,”file“：”8.0550000“,”说明“：”DNS解析服务失败:https://localhost:5001“,”文件“：”t:\src\github\grpc\workspace_csharp_ext_windows_x86\src\core\ext\filters\client_channel\resolver\DNS\c_ares\dns_resolver_ares.cc“,”文件_line“：378,”grpc_status“：14,”referenced_errors“：[{”created“：”@1600333768.0550000“,”说明“：”c-ares 0：无法联系DNS服务器“,”文件“：”t:\src\github\grpc\workspace_csharp_ext_windows_x86\src\core\ext\filters\client_channel\resolver\DNS\c_ares\grpc_ares_wrapper.cc“,”file_line“：287,”referenced_errors“：[{”created“：”@1600333768.0550000“,”description“：”C-ares状态不是ARES_SUCCESS qtype=aaaa name=https://localhost:5001 is_balancer=0:不能联系DNS服务器“,”file“：”]}“）‘

在服务器上，我得到以下错误：

DBUG:microsoft.aspnetcore.server.kestrel[17]连接id“0HM2QU64LCR9J”错误请求数据：“无法识别的HTTP版本：'HTTP/2.0'”Microsoft.aspnetcore.server.kestrel.core.badHttpRequestException:无法识别的HTTP版本：Microsoft.aspnetcore.server.kestrel.core.internal.HTTP.httpparser1。rejectunknownversion(Byte*版本，Int32长度）在microsoft.aspnetcore.server.kestrel.core.internal.HTTP.httpparser1.microsoft.aspnetcore.server.kestrel.core.internal.HTTP.httpparser1.microsoft.aspnetcore.server.kestrel.core.kestrel.core.internal.HTTP.iHttpParser1.parserequestline(TRequestHandler处理程序，readonlySequence，Int32 length）xamined）在Microsoft.aspnetcore.server.kestrel.core.internal.http.http1Connection.takeStartline（readonlySequence1&缓冲区，sequencePosition&已消费，sequencePosition&已检查）在Microsoft.aspnetcore.server.kestrel.core.internal.http1Connection.parserequest（readonlySequence1&缓冲区，sequencePosition&已消费，sequencePosition&已检查）在.http.httpprotocol.processRequests[TContext](ihttpapplication1应用程序）位于Microsoft.aspnetcore.server.kestrel.core.internal.httpprotocol.processRequestSasync[TContext](ihttpapplication1应用程序）dbug:microsoft.aspnetcore.server.kestrel.core.internal.httpprotocol.processRequestSasync[TContext](ihttpapplication1应用程序）连接id“0HM2QU64LCR9J”KETS[6]连接id“0HM2QU64LCR9J”接收到FIN。DBUG:microsoft.aspnetcore.server.kestrel.transport.sockets[7]连接id“0HM2QU64LCR9J”发送FIN，因为：“套接字传输的发送循环顺利完成。”

按照建议在Kestrel中添加了HTTP/2支持，但仍然得到了一个错误：

rpc.core.rpcexception:'status(statuscode=“unknown”,detail=“received http2 header with status：307”,debugexception=“grpc.core.internal.coreerrordetailexception=”grpc.core.internal.coreerrordetailexception:{“created”：“@1600342649.633000000”,“description”：“received http2:status header with non-200 OK status”,“file”“status”：2,“value”：“307”}“）‘




Answer 1

我不相信channel的构造函数参数希望值为URI格式；您最好的选择可能是：

Channel channel = new Channel("localhost", 5001, ChannelCredentials.Insecure)

尽管它也可能作为：

Channel channel = new Channel("localhost:5001", ChannelCredentials.Insecure);