UHTTPFetchRequest Class Reference

#include <HTTPFetchRequest.h>

Inheritance diagram for UHTTPFetchRequest:

Public Member Functions
virtual void	Activate () override

Static Public Member Functions
static UHTTPFetchRequest *	AsyncRequestHTTP (UObject *WorldContextObject, FString URL, FString Field)

Public Attributes
FOnHttpRequestCompleted	OnHttpRequestCompleted
FString	TextField
FString	URL

Protected Member Functions
void	HandleRequestCompleted (FString ResponseString, bool bSuccess)

Member Function Documentation

Activate()

void UHTTPFetchRequest::Activate ( )

overridevirtual

Execute the actual load

{
    //-     Create HTTP Request     //
    TSharedRef<IHttpRequest, ESPMode::ThreadSafe> HttpRequest = FHttpModule::Get().CreateRequest();
    HttpRequest->SetVerb("GET");
    HttpRequest->SetHeader("Content-Type", "application/json");
    HttpRequest->SetURL(URL);
 
    //-     Setup Async response    //
    HttpRequest->OnProcessRequestComplete().BindLambda([this](FHttpRequestPtr Request, FHttpResponsePtr Response, bool bSuccess)
        {
            FString ResponseString = "";
            if (bSuccess && Response.IsValid())
            {
                ResponseString = Response->GetContentAsString();
            }
 
            this->HandleRequestCompleted(ResponseString, bSuccess);
        });
    
    //-     Handle actual request       //
    HttpRequest->ProcessRequest();
}

AsyncRequestHTTP()

UHTTPFetchRequest * UHTTPFetchRequest::AsyncRequestHTTP ( UObject * WorldContextObject, FString URL, FString Field )

static

{
    //-     Create Action Instance for Blueprint System     //
    UHTTPFetchRequest* Action = NewObject<UHTTPFetchRequest>();
    Action->URL = URL;
    Action->RegisterWithGameInstance(WorldContextObject);
    Action->TextField = Field;
    
    return Action;
}

HandleRequestCompleted()

void UHTTPFetchRequest::HandleRequestCompleted ( FString ResponseString, bool bSuccess )

protected

{
    FString OutString;
    if (bSuccess)
    {
        //-     Deserialize object      //
        TSharedPtr<FJsonObject> JsonObject = MakeShareable(new FJsonObject());
        TSharedRef<TJsonReader<>> JsonReader = TJsonReaderFactory<>::Create(ResponseString);
        // TSharedRef<TJsonReader<TCHAR>> JsonReader = TJsonReaderFactory<>::Create(ResponseString);
        if(FJsonSerializer::Deserialize(JsonReader, JsonObject) && JsonObject.IsValid())
        {
            //-     The simplest example parsing of the plain JSON                                          //
            //-     Here you can expand to fetch your specific layout of values and objects and return      //
            //-     it via a UStruct or separate params in the Completed.Broadcast()                        //
            if (!JsonObject->TryGetStringField(TextField, OutString))
            {
                //-     While response may be successful, we failed to retrieve the string field    //
                bSuccess = false;
            }
        }
        else
        {
            // JSON deserialization failed
            bSuccess = false;
        }
    }
    OnHttpRequestCompleted.Broadcast(OutString, bSuccess);
 
}

Member Data Documentation

OnHttpRequestCompleted

FOnHttpRequestCompleted UHTTPFetchRequest::OnHttpRequestCompleted

TextField

FString UHTTPFetchRequest::TextField

URL

FString UHTTPFetchRequest::URL

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The documentation for this class was generated from the following files:

• T:/Unreal/Unreal Projects/SpaceAdventure52/SpaceAdventure/Plugins/MenuSystem/Source/MenuSystem/Public/Http/HTTPFetchRequest.h
• T:/Unreal/Unreal Projects/SpaceAdventure52/SpaceAdventure/Plugins/MenuSystem/Source/MenuSystem/Private/Http/HTTPFetchRequest.cpp