聊聊程式

HttpRequest 
httpRequest.Headers["key"];  //不會UrlDecode
httpRequest.Query["key"];     //會UrlDecode

CustomAuthorization  跟 Redis backplane

public class CustomAuthorizationRequirement : IAuthorizationRequirement
{
}

public class CustomAuthorizationHandler : AuthorizationHandler<CustomAuthorizationRequirement>
{
    readonly IHttpContextAccessor _httpContextAccessor;

    public CustomAuthorizationHandler(IHttpContextAccessor httpContextAccessor)
    {
        _httpContextAccessor = httpContextAccessor;
    }
    protected override Task HandleRequirementAsync(AuthorizationHandlerContext context, CustomAuthorizationRequirement requirement)
    {
        if(isValid) context.Succeed(requirement);
        else context.Fail();

        return Task.CompletedTask;     
    }  
}
//Startup.cs --ConfigureServices
services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
services.AddSingleton<IAuthorizationHandler, CustomAuthorizationHandler>();
services.AddAuthorization(options =>
{
    options.AddPolicy("CustomHubAuthorizatioPolicy", policy =>
    {
        policy.Requirements.Add(new CustomAuthorizationRequirement());
    });
});
services.AddSignalR().AddStackExchangeRedis(Configuration["Radis:Url"], options => {
    options.Configuration.ChannelPrefix = "MyApp";
}); ;
//Startup.cs --Configure
app.UseEndpoints(endpoints =>
{
    endpoints.MapHub<CommentsHub>($"/{nameof(CommentsHub)}", options =>
    {
        options.Transports = HttpTransportType.WebSockets;
    });
});

設定LoadBalancer的有兩台主機的時候 會連線失敗時
可以設定  省略/negotiate

let connection = new signalR.HubConnectionBuilder()
    .withUrl("/chathub", {
        skipNegotiation: true,
        transport: signalR.HttpTransportType.WebSockets
    })
    .build();