Download a File from the Server

In this document we will explain how to set up Blueprint nodes in Unreal Engine to allow a user to download a file from a specific path on the server via the Eagle 3D Streaming (E3DS) platform.

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Demo URL:
https://connector.eagle3dstreaming.com/v5/e3ds_dev1/ue55cpp/default

Press the H key on your keyboard to download the file.

Prerequisite:

Before proceeding, ensure you have downloaded and installed the E3DS Features Plugin in your Unreal Engine project. For detailed instructions, refer to:
Download and Install the E3DS Features Plugin

Follow the guidelines below:

Part 1. Blueprint Logic for Downloading a File

1. Open your level that you intend to stream.
   

2. Add the E3DS_PS_actor to your level if it’s not already present.
   

   

   
   

3. Open the Level Blueprint.
   

4. In the Event Graph, right-click and search for the Keyboard H event to add it to the graph.
   

5. Drag from the Pressed execution pin of the H key event and search for the Download A File From Unreal App Directory To User's Device node.
   

6. Right-click on the graph and add a Get Project File Path node. You will need to provide the path to the file you want to make downloadable.
   

7. Right-click again and add the Construct PS Message To Download A File from Unreal App Directory To User's Device node.
   

8. Connect the Return Value of the Get Project File Path node to the Relative Path Of The File In Unreal Path Directory input pin of the Construct PS Message... node.
   

9. Connect the Message To Send To E3DS output pin from the Construct node to the Relative Path Of The File In Unreal Path Directory input pin on the Download A File... node.
   

10. Connect the nodes as shown below.
    

    

    
    

11. Compile and Save the Blueprint.

Part 2. Verification

To verify that the file download functionality works:

1. Connect to your remote editor session in your web browser. Refer to:
   How to test in remote editor streaming
   

2. Click inside the editor viewport to ensure it has focus.
   

3. Press the H key on your keyboard.

Expected Result:

• Your browser should automatically download the file specified in the Get Project File Path node from the server.

• This confirms that the Blueprint is successfully triggering the file download command on the client’s browser.

Related Guides

• How to test in remote editor streaming

• How to do blueprint debugging incase something in not working

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