ObjectDeliverer

ObjectDeliverer is a flexible data communication library for Unreal Engine. It's available for both C++ and Blueprint.

Table of Contents

• Overview
• Supported UE Versions
• How to Obtain
• Installation Guide
• Quick Start
• Feature Details
  • Communication Protocols
  • Data Division Rules
  • Serialization Methods
• Usage Examples
  • C++ Example
  • Blueprint Example
• Detailed Documentation
• License
• Contributing

Overview

ObjectDeliverer excels as a data communication library with these key advantages:

• Easy Protocol Switching - Seamlessly switch between TCP/IP, UDP, shared memory, and other protocols
• Flexible Data Division Rules - Support for fixed size, header+body, terminal symbol, and more
• Various Serialization Methods - Handle byte arrays, UTF-8 strings, JSON objects, and more
• C++ and Blueprint Support - Use your preferred development method

It simplifies network communication logic, allowing you to focus on application development.

Supported UE Versions

Note: This plugin is updated and maintained only for the latest 3 versions of Unreal Engine.

UE Version	Support Status	Branch Name
UE 5.6	✅ Supported	UE5.6
UE 5.5	✅ Supported	UE5.5
UE 5.4	✅ Supported	UE5.4
UE 5.3	❌ End of Support (v1.6.1+)	UE5.3
Others	🔄 Check docs	master

Branch Structure

master (latest UE version) ──┐
                           ├─ UE5.5 (UE5.5 specific)
                           ├─ UE5.4 (UE5.4 specific)
                           └─ UE5.3 (UE5.3 specific)

• master branch: Always compatible with the latest Unreal Engine version
• UEX.X branches: Stable versions for specific UE versions
• Note: Older version branches may not include the latest features

How to Obtain

UE Marketplace

https://www.fab.com/ja/listings/b6ffd7d7-80da-483f-a7fa-09cb46b72651

If you acquire this plugin through the Marketplace, you will be charged the specified fee.

GitHub

You can clone this repository and use it for free.

Installation Guide

From Marketplace

1. Purchase and download the plugin from the Marketplace
2. Add it to your project from the "Library" section in the UE Launcher
3. Open your project and enable ObjectDeliverer from "Edit" → "Plugins"

From GitHub

1. Clone this repository: git clone https://github.com/ayumax/ObjectDeliverer.git
2. Copy the Plugins directory from the cloned repository to your project folder
3. Build the plugin (requires C++ build environment)
4. Open your project and enable ObjectDeliverer from "Edit" → "Plugins"

Compatibility Check

Choose the appropriate branch based on your UE version:

# Example for UE5.4
git checkout UE5.4

Quick Start

Basic Usage Steps

1. Create an ObjectDelivererManager
2. Set up event handlers (connect, disconnect, data receive)
3. Configure communication protocol and packet rule, then start

Feature Details

Communication Protocols

The following protocols are available by default (you can also add your own):

• TCP/IP Server - Connects to multiple clients
• TCP/IP Client - Connects to a server
• WebSocket Client - Connects to a WebSocket server
• UDP (Sender) - Sends UDP data
• UDP (Receiver) - Receives UDP data
• Shared Memory - Process-to-process communication in Windows
• File Writer - Saves data to a file
• File Reader - Reads data from a file

Data Division Rules

Rules for appropriate packet division and reconstruction of received data:

FixedSize

Example) When using a fixed size of 1024 bytes

Header(BodySize) + Body

Example) When the size area is 4 bytes

Split by terminal symbol

Example) When 0x00 is the end

No division

Uses the received buffer as-is without any packet splitting or combining operations.

Serialization Methods

• Byte Array - Raw binary data
• UTF-8 String - Text data
• Object (JSON) - Structured data

Usage Examples

C++ Example

void UMyClass::Start()
{
    auto deliverer = UObjectDelivererManager::CreateObjectDelivererManager();

    // Set up event handlers
    deliverer->Connected.AddDynamic(this, &UMyClass::OnConnect);
    deliverer->Disconnected.AddDynamic(this, &UMyClass::OnDisConnect);
    deliverer->ReceiveData.AddDynamic(this, &UMyClass::OnReceive);

    // Start communication
    // Protocol: TCP/IP Server
    // Data division rule: Header(Size) + Body
    // Serialization method: Byte array
    deliverer->Start(UProtocolFactory::CreateProtocolTcpIpServer(9099),
                     UPacketRuleFactory::CreatePacketRuleSizeBody());
}

void UMyClass::OnConnect(UObjectDelivererProtocol* ClientSocket)
{
    // Send data
    TArray<uint8> buffer;
    deliverer->Send(buffer);
}

void UMyClass::OnDisConnect(UObjectDelivererProtocol* ClientSocket)
{
    // Handle disconnection
    UE_LOG(LogTemp, Log, TEXT("closed"));
}

void UMyClass::OnReceive(UObjectDelivererProtocol* ClientSocket, const TArray<uint8>& Buffer)
{
    // Handle received data
}

Blueprint Example

Detailed Documentation

For detailed usage of each feature, please refer to the Wiki:

ObjectDeliverer Wiki

License

• This plugin is provided under the MIT License
• However, if you download and use it from the Epic Games Marketplace, the Epic Games license terms will apply

Contributing

We welcome contributions from everyone who wants to improve ObjectDeliverer!

Contribution Process

1. Fork the repository
2. Create your feature branch from the master branch
3. Make your changes
4. Submit a pull request targeting the master branch

Contribution Guidelines

• All pull requests should be directed to the master branch
• For major changes, please open an issue first to discuss what you would like to change(English or Japanese)
• Follow the code style of the existing codebase
• Add or update tests when possible

Testing

ObjectDeliverer includes automated tests for WebSocket functionality. To run tests with a real WebSocket server:

Environment Variables for Testing

Variable	Description	Example
OBJECTDELIVERER_TEST_WS_URL	WebSocket server URL for testing	wss://your-websocket-server.com
OBJECTDELIVERER_TEST_WS_TOKEN	Authentication token for WebSocket server	your-secure-token

Running Tests Locally

1. Without WebSocket server (default):

   # Tests will use ws://localhost:8080 as mock server
   /path/to/UnrealEditor-Cmd YourProject.uproject -ExecCmds="Automation RunTests ObjectDeliverer.ProtocolWebSocket; quit"

2. With WebSocket server:

   export OBJECTDELIVERER_TEST_WS_URL="wss://your-server.com"
   export OBJECTDELIVERER_TEST_WS_TOKEN="your-token"
   /path/to/UnrealEditor-Cmd YourProject.uproject -ExecCmds="Automation RunTests ObjectDeliverer.ProtocolWebSocket; quit"

CI/CD Configuration

For GitHub Actions or other CI systems, set the environment variables as secrets:

env:
  OBJECTDELIVERER_TEST_WS_URL: ${{ secrets.WEBSOCKET_TEST_URL }}
  OBJECTDELIVERER_TEST_WS_TOKEN: ${{ secrets.WEBSOCKET_TEST_TOKEN }}

UE Version Support

When adding new features, please try to make them work across multiple UE versions when possible. If a feature is specific to a particular UE version, please note this clearly.

We appreciate all contributions - bug fixes, feature additions, documentation improvements, suggestions, and more!