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Grpc.Net.Client.Web: Request with RepeatedField Throws InvalidOperationException when GrpcWebText Mode is set

See original GitHub issue

Hello,

I’m trying out the experimental Grpc-Web functionality. On the client side, in Startup.cs, I have:

   var handler = new GrpcWebHandler(GrpcWebMode.GrpcWebText, new HttpClientHandler());

   return new TheBook.TheBookClient(GrpcChannel.ForAddress(":url-to-service:"), new GrpcChannelOptions
            {
                HttpClient = new HttpClient(handler)
            }));

The request I’m sending looks like this (Value is string; the Carriers property is Google.Protobuf.Collections.RepeatedField<string>):

    var getLibraryRequest = new GetLibraryRequest() { UserId = userId, SearchTerm = SearchTerm ?? "" };

    getLibraryRequest.Carriers.AddRange(userAssociations.Where(c => c.Type == "Carrier").Select(c => c.Value));
    var result = await _Client.GetLibraryAsync(getLibraryRequest);

This throws on the client side. After enabling Grpc: Debug in the Logging section in appsettings.json, this is revealed:

Exception thrown: 'System.InvalidOperationException' in Grpc.Net.Client.Web.dll
Exception thrown: 'System.InvalidOperationException' in System.Private.CoreLib.dll
Exception thrown: 'System.InvalidOperationException' in Grpc.Net.Client.dll
Exception thrown: 'System.InvalidOperationException' in System.Private.CoreLib.dll
Exception thrown: 'System.InvalidOperationException' in System.Private.CoreLib.dll
Exception thrown: 'System.InvalidOperationException' in System.Private.CoreLib.dll
Exception thrown: 'System.InvalidOperationException' in System.Private.CoreLib.dll
Exception thrown: 'System.InvalidOperationException' in System.Private.CoreLib.dll
Exception thrown: 'System.InvalidOperationException' in System.Net.Http.dll
Exception thrown: 'System.IO.IOException' in System.Net.Http.dll
Exception thrown: 'System.IO.IOException' in System.Net.Http.dll
Exception thrown: 'System.InvalidOperationException' in System.Private.CoreLib.dll
Exception thrown: 'System.IO.IOException' in System.Private.CoreLib.dll
Exception thrown: 'System.InvalidOperationException' in System.Net.Http.dll
Exception thrown: 'System.Net.Http.HttpRequestException' in System.Net.Http.dll
Exception thrown: 'System.Net.Http.HttpRequestException' in System.Private.CoreLib.dll
Exception thrown: 'System.Net.Http.HttpRequestException' in System.Private.CoreLib.dll
Exception thrown: 'System.Net.Http.HttpRequestException' in System.Private.CoreLib.dll
Exception thrown: 'System.Net.Http.HttpRequestException' in System.Private.CoreLib.dll
Exception thrown: 'System.Net.Http.HttpRequestException' in System.Private.CoreLib.dll
Exception thrown: 'System.Net.Http.HttpRequestException' in System.Net.Http.dll
Exception thrown: 'System.Net.Http.HttpRequestException' in System.Private.CoreLib.dll
Exception thrown: 'System.Net.Http.HttpRequestException' in Grpc.Net.Client.dll
Exception thrown: 'Grpc.Core.RpcException' in System.Private.CoreLib.dll

If I set GrpcWebMode.GrpcWeb in Startup.cs, the request sends, successfully hits the gRPC service, and completes successfully.

Is GrpcWebText to only be used in situations where you do not need a repeated field? Is there a misunderstanding on my side?

Thank you, Joseph A. Pietrzak, Jr.

Issue Analytics

State:
Created 4 years ago
Comments:5 (3 by maintainers)

Top GitHub Comments

1reaction

JamesNKcommented, Feb 12, 2020

Lets close it

0reactions

joepietrzakcommented, Feb 12, 2020

James,

Okay thank you for the acknowledgement and clarification. I have been using GrpcWeb mode and it handles those large requests well and has been working well in general.

Should I leave this Issue open for your process? Or close it since you have answered my questions?

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