"Bad Request" error message when connecting as client using Unity relay services

Question

So I'm using netcode for gameobjects along with relay service to make a multiplayer game (this is my first time btw). But when connecting with the client I somehow get an error saying Bad Request

Here's the code:

     public struct RelayJoinData
     {
             public string JoinCode;
             public string IPv4Address;
             public ushort Port;
             public Guid AllocationID;
             public byte[] AllocationIDBytes;
             public byte[] ConnectionData;
             public byte[] Key;
             public byte[] HostConnectionData;
     }
 
     public async Task<RelayJoinData> JoinGame(string joinCode)
     {
     //Initialize the Unity Services engine
     await UnityServices.InitializeAsync();
     //Always autheticate your users beforehand
     if (!AuthenticationService.Instance.IsSignedIn)
     {
         //If not already logged, log the user in
         await AuthenticationService.Instance.SignInAnonymouslyAsync();
     }

     
     JoinAllocation joinAllocation = await Relay.Instance.JoinAllocationAsync(joinCode);
     RelayJoinData data = new RelayJoinData
     {
         Key = joinAllocation.Key,
         Port = (ushort)joinAllocation.RelayServer.Port,
         AllocationID = joinAllocation.AllocationId,
         AllocationIDBytes = joinAllocation.AllocationIdBytes,
         ConnectionData = joinAllocation.ConnectionData,
         HostConnectionData = joinAllocation.HostConnectionData,
         IPv4Address = joinAllocation.RelayServer.IpV4,
         JoinCode = joinCode
     };

     Transport.SetRelayServerData(data.IPv4Address, data.Port, data.AllocationIDBytes, data.Key, data.ConnectionData, data.HostConnectionData);
     return data;
 }

I tracked the error down and it seems this line is the cause of the error

 JoinAllocation joinAllocation = await Relay.Instance.JoinAllocationAsync(joinCode);

However, if I change the input for JoinAllocationAsync to a fixed string (e.g: "WJBPKB"), it returns error 404 Not Found

Error: HttpException`1: HTTP/1.1 400 Bad Request Unity.Services.Relay.Http.ResponseHandler.HandleAsyncResponse (Unity.Services.Relay.Http.HttpClientResponse response, System.Collections.Generic.Dictionary`2[TKey,TValue] statusCodeToTypeMap) (at Library/PackageCache/com.unity.services.relay@1.0.1-pre.5/Runtime/Http/ResponseHandler.cs:103) Unity.Services.Relay.Http.ResponseHandler.HandleAsyncResponse[T] (Unity.Services.Relay.Http.HttpClientResponse response, System.Collections.Generic.Dictionary`2[TKey,TValue] statusCodeToTypeMap) (at Library/PackageCache/com.unity.services.relay@1.0.1-pre.5/Runtime/Http/ResponseHandler.cs:186) Unity.Services.Relay.Apis.Allocations.AllocationsApiClient.JoinRelayAsync (Unity.Services.Relay.Allocations.JoinRelayRequest request, Unity.Services.Relay.Configuration operationConfiguration) (at Library/PackageCache/com.unity.services.relay@1.0.1-pre.5/Runtime/Apis/AllocationsApi.cs:188) Unity.Services.Relay.WrappedRelayService.JoinAllocationAsync (System.String joinCode) (at Library/PackageCache/com.unity.services.relay@1.0.1-pre.5/Runtime/SDK/WrappedRelayService.cs:144) Rethrow as RelayServiceException: Bad Request: invalid request schema or decoding failure Unity.Services.Relay.WrappedRelayService.JoinAllocationAsync (System.String joinCode) (at Library/PackageCache/com.unity.services.relay@1.0.1-pre.5/Runtime/SDK/WrappedRelayService.cs:150) RelayManager.JoinGame (System.String joinCode) (at Assets/Scripts/RelayManager.cs:108) UIManager.b_9_1 () (at Assets/Scripts/UIManager.cs:41) System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.b_7_0 (System.Object state) (at :0) UnityEngine.UnitySynchronizationContext+WorkRequest.Invoke () (at :0) UnityEngine.UnitySynchronizationContext.Exec () (at :0) UnityEngine.UnitySynchronizationContext.ExecuteTasks () (at :0)

Anyone know how to fix this error. This is the first time I've gotten this and I'm kind of confused

Answer 1

Answer by simvirgon · Mar 02 at 04:38 PM

same here.. It is the first time I am testing this so I cannot be sure the error is not somewhere in my part of the code though.. Was it working for you before?

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Tuantin09 · Mar 03 at 02:03 AM 0

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As soon as I implemented Relay it stopped working. I don't know if the problem is with the code because I copy it from Unity documents

Answer 2

Answer by simvirgon · Mar 01 at 05:30 PM

Same here... updating the Relay to pre5 did not help. Did you have it working before? I will give it a go on two separate devices tomorrow, I was using parallelsync from one computer, maybe that is the issue.

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Tuantin09 · Mar 02 at 03:22 AM 0

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Both pre3 and pre5 produces the same error, I tested both on one device and two separate ones but no luck (pre3).I didn't test it with pre5 though, maybe I'll try it later :v

Edit: a little update, it didn't work on two different devices

simvirgon · Mar 02 at 09:58 AM 1

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I found out what I did wrong: I was simply passing the wrong join code (Instead of a valid join code I passed the Id of the Lobby). Make sure that you pass a valid join code, it should be a 6 character string. Hope that helps.

Tuantin09 simvirgon · Mar 02 at 11:50 AM 0

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I used Relay.Instance.GetJoinCodeAsync(relayHostData.AllocationID); to get the join code

Although I triple checked the join code an exception was still thrown

Is there anything wrong, it was 6 character, all in capital, contains both letters and numbers

simvirgon · Mar 03 at 09:39 AM 1

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Is it possible that the Relay times out before you join it? If the Unity transport is not sending any data over the relay, it will shutdown after 10 seconds. I am not sure if it will return a bad request in this case or a different Http Error though.

Tuantin09 simvirgon · Mar 03 at 12:03 PM 0

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I've tried again and it doesn't seem like it timed out since I connected as soon as the server started. I'm pretty sure it was less than 5s

Answer 3

Answer by vincent582 · Mar 28 at 09:02 AM

Hello guys, dit you find the solution ?

I tried to implement the relay service too and got the same error when try to connect on clients. The host looks working fine as it shown an PlayerObject.

I tried to pass custom code or used Relay.Instance.GetJoinCodeAsync(Data.AllocationID), neither works!

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Answer 4

Answer by Awix_Studio · May 18 at 09:27 AM

Did you also join host with JoinAllocationAsync(joinCode)? Because if you do, host will be connected as client and relay will be timed out. So then you get your error 404 Not Found.

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Answer 5

Answer by Awix_Studio · May 17 at 04:02 PM

Did you also join host with JoinAllocationAsync(joinCode)? Because if you do, host will be connected as client and relay without host will be timed out. So then you get your error 404 Not Found.

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"Bad Request" error message when connecting as client using Unity relay services

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