ASP.NET Core SignalR 中使用 MessagePack

It's like JSON.
but fast and small.

MessagePack is an efficient binary serialization format. It lets you exchange data among multiple languages like JSON. But it's faster and smaller. Small integers are encoded into a single byte, and typical short strings require only one extra byte in addition to the strings themselves.

MessagePack 是一个高效的二进制序列化格式。它让你像JSON一样可以在各种语言之间交换数据。但是它比JSON更快、更小。小的整数会被编码成一个字节，短的字符串仅仅只需要比它的长度多一字节的大小。

在 SignalR 中使用 MessagePack 也很简单：

public void ConfigureServices(IServiceCollection services)
        {
            //自定义配置
            services.Configure<DbSetting>(Configuration.GetSection("ConnectionStrings"));

            //https://docs.microsoft.com/en-us/aspnet/core/security/gdpr?view=aspnetcore-2.1
            services.Configure<CookiePolicyOptions>(options =>
            {
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });

            //添加 Hangfire 服务
            services.AddHangfire(config => config.UseRedisStorage(Redis));
            // services.AddHangfire(config => config.UseSqlServerStorage("<connection string>"));

            //添加 Cookie 中间件
            services.AddAuthentication(sharedOptions =>
            {
                sharedOptions.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
                // sharedOptions.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
            })

            //.AddAzureAdB2C(opts => Configuration.Bind("AzureAdB2C", opts))
            .AddCookie(opts =>
            {
                opts.LoginPath = new PathString("/account/login");
                opts.AccessDeniedPath = new PathString("/account/denied");
            });

            services.AddSignalR(options =>
            {
                //Faster pings for testing
                options.KeepAliveInterval = TimeSpan.FromSeconds(5);
            })
            .AddMessagePackProtocol(options =>
            {
                options.FormatterResolvers = new List<MessagePack.IFormatterResolver>()
                {
                    MessagePack.Resolvers.StandardResolver.Instance
                };
            })
            .AddRedis(Configuration.GetConnectionString("Redis"));

            //返回大小写问题
            services.AddMvc()
                    .AddJsonOptions(option => option.SerializerSettings.ContractResolver = new Newtonsoft.Json.Serialization.DefaultContractResolver());
        }

.NET 客户端

var hubConnection = new HubConnectionBuilder()
                        .WithUrl("/chatHub")
                        .AddMessagePackProtocol()
                        .Build();

JavaScript 客户端

npm install @aspnet/signalr-protocol-msgpack

const connection = new signalR.HubConnectionBuilder()
                              .withUrl("/hqHub")
                              .withHubProtocol(new signalR.protocols.msgpack.MessagePackHubProtocol())
                              .build();

REFER:
https://docs.microsoft.com/en-us/aspnet/core/signalr/messagepackhubprotocol?view=aspnetcore-2.1
https://damienbod.com/2018/03/19/using-message-pack-with-asp-net-core-signalr/

ASP.NET Core SignalR 中使用 MessagePack

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