Not working on Unreal 4.27

[mostafabder1]

there is nothing happens in unreal side when connecting to SignalR URL
also there is no printing logs
i tried Hub->On, OnConnected, OnConnectionError but not working
any help? or Documentation?

[Amaratsu]

You can use this plug-in as a project plug-in, or an Engine plug-in:

If you use it as a project plug-in, clone this repository into your project's Plugins directory and compile your game in Visual Studio. A C++ code project is required for this to work.

If you use it as an Engine plug-in, clone this repository into the Engine/Plugins directory and compile your game. Full Unreal Engine source code from GitHub is required for this.

This plug-in is enabled by default, so no need to enable it in the plug-in browser.

Link the SignalR module to to yours with PublicDependencyModuleNames or PrivateDependencyModuleNames in .build.cs:

PrivateDependencyModuleNames.AddRange(new string[]
{
"SignalR",
}
);
Create a hub connection with the SignalR engine subsystem:

#include "SignalRModule.h"
#include "IHubConnection.h"

TSharedPtr Hub = GEngine->GetEngineSubsystem()->CreateHubConnection("https://example.com/chathub");
Bind an event which is fired when the server call it to the client.

Hub->On(TEXT("EventName")).BindLambda([](const TArray& Arguments) {
...
});
Invoke fires an event when the server has finished invoking the method (or an error occurred). In addition, the event can receive a result from the server method, if the server returns a result.

Hub->Invoke(TEXT("Add"), 1, 1).BindLambda([](const FSignalRValue& Result) {
UE_LOG(LogTemp, Warning, TEXT("The result value is: %d"), Result.AsInt());
});
Unlike the Invoke method, the Send method doesn't wait for a response from the server.

Hub->Send(TEXT("Add"), 1, 1);

[mostafabder1]

That’s what i have been doing for 5 days,
But nothing happened
Not even logs tells anything
Even OnConnectionError
And this library is the only for SignalR in UE :(

[intelligide]

@mostafabder1 Have you called IHubConnection::Start() after binding the events ?

[mostafabder1]

Yup, i did multiple debugging in Connection.Cpp , i found that FConnection::Negotiate has been called but the HttpRequest->OnProcessRequestComplete() listner doesn't been called so that never reached FConnection::OnNegotiateResponse

[alexhajdu]

The plugin is definitely working, but strange enough, logs are not. I can confirm that. However, in the debug build, I was able to set break points to see, all is working as expected.
@mostafabder1 Try debug config and break-points

[intelligide]

@mostafabder1 You just need to persist a reference to the connection object somewhere in your code to ensure that the object is not destroyed when the pointer is destroyed. As the functions are asynchronous, the shared pointer deletes the connection object before the negotiation with the server ended if there are no more references to the connection object.