[Plugin] Http/s REST, blueprintable JSON and Parse REST API manager at once (VaRest)

[ptjackson]

I was looking for some help, I want to know how to get the VaRestSubsystem node that is in blueprints in c++.
When I use the blueprint node I get no warnings and everything works, when I use my code below it still works but it gives a warning in the log that I can't understand why.
Even though it works, I run a lot of json messages in my project and I don't want my dedicated server to be pushing a lot of warning messages into the log file.



The Error I get when I run in c++ is below:



My c++ header code has:

UPROPERTY()
UVaRestSubsystem* VSubsystem;

UPROPERTY(replicated, EditAnywhere, BlueprintReadWrite, Category = Database)
UVaRestRequestJSON* RequestBP;

UPROPERTY(replicated, EditAnywhere, BlueprintReadWrite, Category = Database)
UVaRestJsonObject* RequestObjectBP;

and my cpp code is:

VSubsystem = GEngine->GetEngineSubsystem<UVaRestSubsystem>();
RequestBP = VSubsystem->ConstructVaRestRequestExt(EVaRestRequestVerb::POST, EVaRestRequestContentType::x_www_form_urlencoded_url);
RequestObjectBP = VSubsystem->ConstructVaRestJsonObject();

As soon as the second line and third line in my cpp file runs it pops the warning error and I narrowed it down to those exact lines that make the warning log.

When I do the exact same thing using the blueprint nodes it doesn't pop up with this warning log because it is using the actual VaRestSubsytem Node.

So is my line:
VSubsystem = GEngine->GetEngineSubsystem<UVaRestSubsystem>();
not the same thing as using the blueprint node??

Thank you for your time.

[ufna]

You shouldn't use "replicated" keyword with requests

[ptjackson]

You shouldn't use "replicated" keyword with requests

THANK YOU SO MUCH!
that was the issue and I wouldn't have realized it, Ive been using your plugin since 4.15 I believe and have loved it! I appreciate the work you do and help!!

[TheMcAddy]

ufna Hope you can help in pointing me to a tutorial on how to POST with VaREST. I have watched a few, all old and did not look like it had the same nodes as 4.25. I am looking to send a player name to a PHP server ( I have it talking to the server ), but I cannot see what the JSON looks like. So in PHP if($_POST) always fails. I have more complex coding to do, so would like to see a tutorial on it all. I can appreciate your busy so any pointers ?

[User345546056]

ufna
Using the "Construct Json Request"-node, can you explain what PUT and CUSTOM do and how to use them ?
I want to embeed a small game on a wordpress-site. I want to activate a wordpress shortcode when clicking on a widget button inside the game. How can I achieve this?
I think all I need is to just show and hide stuff on the wordpress site. Nothing too special stuff...

[frostic]

ufna

Do you have a discord server?

[SUGER ONE]

LogHttp: Warning: 000001A8BA567380: invalid HTTP response code received. URL: https://uapi.ust.hk/sensor-data_sear...desc&size=1000, HTTP code: 0, content length: 0, actual payload size: 0
LogHttp: Warning: 000001A8BA567380: request failed, libcurl error: 60 (Peer certificate cannot be authenticated with given CA certificates)
LogHttp: Warning: 000001A8BA567380: libcurl info message cache 0 ( Trying 143.89.12.89...)
LogHttp: Warning: 000001A8BA567380: libcurl info message cache 1 (TCP_NODELAY set)
LogHttp: Warning: 000001A8BA567380: libcurl info message cache 2 (Connected to uapi.ust.hk (143.89.12.89) port 443 (#106))
LogHttp: Warning: 000001A8BA567380: libcurl info message cache 3 (ALPN, offering http/1.1)
LogHttp: Warning: 000001A8BA567380: libcurl info message cache 4 (Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH)
LogHttp: Warning: 000001A8BA567380: libcurl info message cache 5 (TLSv1.3 (OUT), TLS handshake, Client hello (1)
LogHttp: Warning: 000001A8BA567380: libcurl info message cache 6 (TLSv1.3 (IN), TLS handshake, Server hello (2)
LogHttp: Warning: 000001A8BA567380: libcurl info message cache 7 (TLSv1.2 (IN), TLS handshake, Certificate (11)
LogHttp: Warning: 000001A8BA567380: libcurl info message cache 8 (TLSv1.2 (OUT), TLS alert, Server hello (2)
LogHttp: Warning: 000001A8BA567380: libcurl info message cache 9 (SSL certificate problem: unable to get local issuer certificate)
LogHttp: Warning: 000001A8BA567380: libcurl info message cache 10 (Closing connection 106)
LogVaRest: Error: Request failed (0): https://uapi.ust.hk/sensor-data_sear...desc&size=1000

why? I can get it correctly through authorization on postman, but use varest to get error reports. What should I do?

[Frostsoft Studio]

Ok, looks like I have to use a class that is derived from UObject. So I've done this:

header:

/**
*
*/
UCLASS()
class MYOBJECT_API URestCommunicator : public UObject
{
GENERATED_BODY()
public:
UFUNCTION()
bool Initialize();

UFUNCTION()
void OnRESTComplete(UVaRestRequestJSON* Request);

UFUNCTION()
void OnRESTFail(UVaRestRequestJSON* Request);
private:
/** The REST system that is used to send data via REST. */
UPROPERTY()
UVaRestSubsystem* RESTSystem;

UPROPERTY()
UVaRestRequestJSON* JSONRequest;
};

Then in the class's cpp file:

bool URestCommunicator::Initialize()
{
if (GEngine != nullptr)
{
RESTSystem = GEngine->GetEngineSubsystem<UVaRestSubsystem>();
if (RESTSystem == nullptr)
{
return false;
}
}
else
{
return false;
}

JSONRequest = RESTSystem->ConstructVaRestRequestExt(EVaRestRequestVerb::POST, EVaRestRequestContentType::json);
if (JSONRequest != nullptr)
{
JSONRequest->OnRequestComplete.AddDynamic(this, &URestCommunicator::OnRESTComplete);
JSONRequest->OnRequestFail.AddDynamic(this, &URestCommunicator::OnRESTFail);
}
return true;
}

I was able to compile the code. However when I run it, during the Initialize(), I got the following error in the Output Log:

LogOutputDevice: Error: === Handled ensure: ===
LogOutputDevice: Error: Ensure condition failed: this->IsBound() [File:C:\Program Files\Epic Games\UE_4.24\Engine\Source\Runtime\Core\Public\Delegates/DelegateSignatureImpl.inl] [Line: 1132]
LogOutputDevice: Error: Unable to bind delegate to 'OnRESTComplete' (function might not be marked as a UFUNCTION or object may be pending kill)

As can be seen in my code, I have included UFUNCTION in front of my methods that should handle the delegate. I checked to make sure the JSONRequest object is valid. Could it be that the JSONRequest object really is already in pending state?
I know this is probably not a problem with the plugin, and more to do with the delegate add/bind issue. But just wondering if someone else has tried to do this in C++ and can spot where my problem is.

Dont know if this is failsafe but i got it working.

.h

#pragma once

#include "CoreMinimal.h"
#include "Engine/GameInstance.h"
#include "VaRestJsonObject.h"
#include "VaRestRequestJSON.h"
#include "VaRestSubsystem.h"
#include "CLInternalSave.h"
#include "CLGameInstance.generated.h"

DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FReqComplete, UVaRestRequestJSON*, VarName);
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FRequestFail, UVaRestRequestJSON*, VarName);

UCLASS()
class CODENAMELOKA_API UCLGameInstance : public UGameInstance
{
GENERATED_BODY()

public:

UFUNCTION()
void RequestComplete(UVaRestRequestJSON* VarName);

UFUNCTION()
void RequestFail(UVaRestRequestJSON* VarName);

UPROPERTY()
FReqComplete RComplete;

UPROPERTY()
FRequestFail RFail;

UPROPERTY()
UCLInternalSave* SaveObj;

UPROPERTY()
UCLInternalSave* LoadObj;

UFUNCTION()
virtual void Init() override;

UFUNCTION()
bool Initialize();

UPROPERTY(BlueprintReadOnly)
bool KeepLoggedIn;

UPROPERTY(BlueprintReadOnly)
bool DoWeHaveSave;

UPROPERTY(BlueprintReadOnly)
FString Username;

UPROPERTY(BlueprintReadOnly)
FString Password;

UPROPERTY(BlueprintReadOnly)
FString OldSessionID;

UPROPERTY(BlueprintReadOnly)
FString NewSessionID;

private:

UPROPERTY()
UVaRestSubsystem* RESTSystem;

UPROPERTY()
UVaRestRequestJSON* JsonRequest;

UPROPERTY()
UVaRestJsonObject* JsonObject;
};

.cpp

#include "CLGameInstance.h"
#include "CLInternalSave.h"
#include "Kismet/GameplayStatics.h"


// Callback if Request Completed
void UCLGameInstance::RequestComplete(UVaRestRequestJSON* VarName)
{
UE_LOG(LogTemp, Warning, TEXT("Request Sucess!"));
}

// Callback if Request Failed!
void UCLGameInstance::RequestFail(UVaRestRequestJSON* VarName)
{
UE_LOG(LogTemp, Warning, TEXT("Request Failed!!"));
}

void UCLGameInstance::Init()
{
UE_LOG(LogTemp, Log, TEXT("Initializing GameInstance!"));

// Run this only for client
if (!IsRunningDedicatedServer())
{
// Create our internal save object.
SaveObj = Cast<UCLInternalSave>(UGameplayStatics::CreateSaveGameObject(UCLInternalSave::StaticClass()));

// Check if we have internal save file
if (UGameplayStatics::DoesSaveGameExist("InternalSave", 0))
{
// Create our internal load object.
LoadObj = Cast<UCLInternalSave>(UGameplayStatics::LoadGameFromSlot("InternalSave", 0));

DoWeHaveSave = false;
if (LoadObj->Username != "")
{
DoWeHaveSave = true;
// Get data from savefile.
KeepLoggedIn = LoadObj->KeeploggedIn;
Username = LoadObj->Username;
OldSessionID = LoadObj->OldSessionID;
}

if (KeepLoggedIn)
{
Password = LoadObj->Password;
}
else
{
UE_LOG(LogTemp, Log, TEXT("Save data found. Not logged in."));
return;
}
}
else
{
UE_LOG(LogTemp, Log, TEXT("Save data not found!"));
return;
}
if (UGameplayStatics::SaveGameToSlot(SaveObj, "internalSave", 0))
{
UE_LOG(LogTemp, Log, TEXT("Saved Sucessfull!"));
}
}
Initialize(); // Send Request to loginserver
}

bool UCLGameInstance::Initialize()
{
if (GEngine != nullptr)
{
// VaRest Subsystem
RESTSystem = GEngine->GetEngineSubsystem<UVaRestSubsystem>();

if (RESTSystem == nullptr)
{
return false;
}
}
else
{
return false;
}

// Create Json request object
JsonRequest = RESTSystem->ConstructVaRestRequestExt(EVaRestRequestVerb::POST, EVaRestRequestContentType::x_www_form_urlencoded_url);
if (JsonRequest != nullptr)
{
// Create our response object
JsonObject = JsonRequest->GetRequestObject();
// Any data we want to send to the server
JsonObject->SetStringField("key", "value");
// Send the request
JsonRequest->ProcessURL("http://localhost/reguser.php?user=test");

// Handle the callback
JsonRequest->OnRequestComplete.AddDynamic(this, &UCLGameInstance::RequestComplete);
JsonRequest->OnRequestFail.AddDynamic(this, &UCLGameInstance::RequestFail);

}
return true;
}

[salutpocani]

Hello guys!
I am bit stuck need to send request with paticular body that starts from " [ " , string like this

But when i use this node ,

output print say that in there just empty {}. Plz help

[TWTCz]

Crash when converting Json code obtained by POST to a string

I want to send the DbAccess API in POST and output the value obtained in Json as a string.
UE4 crashes when I try to convert the response from the server to a string from Json
I would like to know what the solution to this problem is.

I'd like to send a Json request, but please tell me how I can set up a node to do the same results in UE4 that are shown in POSTMAN.

[MAXONline]

Hello. Please help with the format. I serialized to json and send. And I get it on the server in a different format. How do I make it send Json?

[Moebius_GS]

Hello everyone,

I'm kindda stuck with some simple.

I have a data table on the engine with some info, and I want to change that info through a Json file on a server.

I was able to make the json file communicate with UE4 but I have not been able to make the changes that I make in the Json file be reflected in the compiled one. When I do a print string I can see all the code from the Json file on the screen but I have not been able to get the change done when I edit the json on the server.

Thanks for the Help !

[Bubs Flo]

Trying to catch up on the changes this plugin has gone through, everything seems to be getting simpler to use. Thank you!

I have one question: Both of these methods work, is there a reason to use one over the other?

[ResonanceTorino]

Hi all, I create some widgets in BP, for register an ID in my db, first time the game is launched, and after the user can manage his profile. All is working, but I can't test connection..
In general, the BindEvent on RequestFail never fire, if I remove or delete my php page, or set a fake url, i can't get a fail notification.
I tried with CallUrl, and in Callback test if IsValid Json, so I could print a error message (test-connection.jpg)



In (test2.jpg) I tried ExecuteProcessRequest, in this case EventFail fired, but immediatly UE crashed.



Please can someone help me for check connection before load php page, or check if the response fail?
Thanks

[ResonanceTorino]

Sorry for wrong large images in text, is my first post on forum..