C#•2y ago

❔ SignalR

Trying to send a message from a client to specific client (like private chat)

25 Replies

First i tried doing this without Identity but it seems like the Context.UserIdentifier will always be null

 public async Task SetUserIdentifier(string userIdentifier)
        {
            try
            {
                Console.WriteLine($"Setting user identifier to {userIdentifier}");

                var user = await _dbContext.Users.FirstOrDefaultAsync(u => u.UserName == userIdentifier);

                if (user == null)
                {
                    user = new User { UserName = userIdentifier };
                    await _dbContext.Users.AddAsync(user);
                    await _dbContext.SaveChangesAsync();
                }                              

                await Groups.RemoveFromGroupAsync(Context.ConnectionId, user.Id);
                await Groups.AddToGroupAsync(Context.ConnectionId, user.Id);
                await Clients.Caller.SendAsync("UserIdentifierSet", user.Id);

            }
            catch (Exception ex)
            {
                Console.WriteLine($"Exception: {ex.Message}");
            }
        }

 public async Task SetUserIdentifier(string userIdentifier)
        {
            try
            {
                Console.WriteLine($"Setting user identifier to {userIdentifier}");

                var user = await _dbContext.Users.FirstOrDefaultAsync(u => u.UserName == userIdentifier);

                if (user == null)
                {
                    user = new User { UserName = userIdentifier };
                    await _dbContext.Users.AddAsync(user);
                    await _dbContext.SaveChangesAsync();
                }                              

                await Groups.RemoveFromGroupAsync(Context.ConnectionId, user.Id);
                await Groups.AddToGroupAsync(Context.ConnectionId, user.Id);
                await Clients.Caller.SendAsync("UserIdentifierSet", user.Id);

            }
            catch (Exception ex)
            {
                Console.WriteLine($"Exception: {ex.Message}");
            }
        }

Im just reading and trial and error as im going

ProtagonistOP•2y ago

enter user Id first then you want to send to a specific user, so you use their UserId and enter a message

ProtagonistOP•2y ago

The Context.User.Identifier is meant to automatically set based on the authentication But it seems like it isnt being set here Can anyone help out/ im using the user.id in the code above instead of the Context.User.Identifier because it returns me null

JakenVeina•2y ago

what is Context.User.Identifier?

ProtagonistOP•2y ago

returns the unique identifier for the current user associated with the connection

ProtagonistOP•2y ago

https://learn.microsoft.com/en-us/aspnet/core/signalr/authn-and-authz?view=aspnetcore-7.0&viewFallbackFrom=aspnetcore-2.2

Authentication and authorization in ASP.NET Core SignalR

Learn how to use authentication and authorization in ASP.NET Core SignalR.

JakenVeina•2y ago

let's see your auth config, then

ProtagonistOP•2y ago

builder.Services.AddDbContext<ApplicationDBContext>(options =>
{
    options.UseInMemoryDatabase(databaseName: "MyDatabase");
});
builder.Services.AddIdentity<User, IdentityRole>()
    .AddEntityFrameworkStores<ApplicationDBContext>()
    .AddDefaultTokenProviders();
builder.Services.AddSingleton<IUserIdProvider, CustomUserIdProvider>();

builder.Services.AddDbContext<ApplicationDBContext>(options =>
{
    options.UseInMemoryDatabase(databaseName: "MyDatabase");
});
builder.Services.AddIdentity<User, IdentityRole>()
    .AddEntityFrameworkStores<ApplicationDBContext>()
    .AddDefaultTokenProviders();
builder.Services.AddSingleton<IUserIdProvider, CustomUserIdProvider>();

and i do call the authentication on use

JakenVeina•2y ago

okay

ProtagonistOP•2y ago

do u see the problem>?

JakenVeina•2y ago

no oh, wait you did post your config let's see CustomUserIdProvider

ProtagonistOP•2y ago

 public string GetUserId(HubConnectionContext connection)
    {
        // Get the authenticated user's ID from the ClaimsPrincipal
        var userIdClaim = connection.User?.FindFirst(ClaimTypes.NameIdentifier);

        if (userIdClaim != null)
        {
            return userIdClaim.Value;
        }

        // If the user is not authenticated or the NameIdentifier claim is not present, return null
        return null;
    }

 public string GetUserId(HubConnectionContext connection)
    {
        // Get the authenticated user's ID from the ClaimsPrincipal
        var userIdClaim = connection.User?.FindFirst(ClaimTypes.NameIdentifier);

        if (userIdClaim != null)
        {
            return userIdClaim.Value;
        }

        // If the user is not authenticated or the NameIdentifier claim is not present, return null
        return null;
    }

well i just checked the UserIdclaim seems to be null howcomes its null tho

JakenVeina•2y ago

what other claims are there?

ProtagonistOP•2y ago

i believe thats the only one

JakenVeina•2y ago

well, don't believe find out

ProtagonistOP•2y ago

it is the only one would i have to put all the other claims on false if im not using them? could that be why?

JakenVeina•2y ago

so, wait is it there or not? if it's there, what's the problem?

ProtagonistOP•2y ago

that claim is the only one there the problem im facing is that idprovider should assign the Context.UserIdentifier a value if its not null but it is null

JakenVeina•2y ago

okay, so again if the claim is there then what's wrong? if Context.UserIdentifier is null, I have to assume you're not correctly configuring SignalR to use your CustomerUserIdProvider except, then how are you able to confirm what claims are present? show me the ClaimsPrincipal

ProtagonistOP•2y ago

  public async Task SetUserIdentifier(string userIdentifier)
        {
            try
            {
                Console.WriteLine($"Setting user identifier to {userIdentifier}");

                var user = await _dbContext.Users.FirstOrDefaultAsync(u => u.UserName == userIdentifier);

                if (user == null)
                {
                    user = new User { UserName = userIdentifier };
                    await _dbContext.Users.AddAsync(user);
                    await _dbContext.SaveChangesAsync();
                }

                var claims = new List<Claim>
        {
            new Claim(ClaimTypes.Name, user.UserName)
        };
                var userIdentity = new ClaimsIdentity(claims, "login");
                var userPrincipal = new ClaimsPrincipal(userIdentity);


                await Groups.RemoveFromGroupAsync(Context.ConnectionId, user.Id);
                await Groups.AddToGroupAsync(Context.ConnectionId, user.Id);
                await Clients.Caller.SendAsync("UserIdentifierSet", user.Id);

            }
            catch (Exception ex)
            {
                Console.WriteLine($"Exception: {ex.Message}");
            }
        }

  public async Task SetUserIdentifier(string userIdentifier)
        {
            try
            {
                Console.WriteLine($"Setting user identifier to {userIdentifier}");

                var user = await _dbContext.Users.FirstOrDefaultAsync(u => u.UserName == userIdentifier);

                if (user == null)
                {
                    user = new User { UserName = userIdentifier };
                    await _dbContext.Users.AddAsync(user);
                    await _dbContext.SaveChangesAsync();
                }

                var claims = new List<Claim>
        {
            new Claim(ClaimTypes.Name, user.UserName)
        };
                var userIdentity = new ClaimsIdentity(claims, "login");
                var userPrincipal = new ClaimsPrincipal(userIdentity);


                await Groups.RemoveFromGroupAsync(Context.ConnectionId, user.Id);
                await Groups.AddToGroupAsync(Context.ConnectionId, user.Id);
                await Clients.Caller.SendAsync("UserIdentifierSet", user.Id);

            }
            catch (Exception ex)
            {
                Console.WriteLine($"Exception: {ex.Message}");
            }
        }

this too confusing

JakenVeina•2y ago

what is?

Henkypenky•2y ago

are u using HttpContext directly in the component?

ProtagonistOP•2y ago

the identity stuff and how SIgnalR is meant to know from authentication and give it a value could this be because everything is on the same page like setting a id/username, and it first checks if the user is logged in? indirectly through hubconnectioncontext hmmm

JakenVeina•2y ago

no this is because your auth system is not working thus, I asked to see your ClaimsPrincipal the one that led you to give a bunch of conflicting answers

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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