New extension: File Upload Download

[github-actions]

Description

This is a GDevelop extension provides file upload/download capabilities and texture pack management for games.

---

Core Features:

1. Text Files

   • Upload text files to variables
   • Download text content as file

2. ZIP Files

   • Upload ZIP files and decompress into variable structures (base64 or text)
   • Download ZIP files
   • Apply texture packs from ZIP files using an index.json manifest

3. Images

   • Download game resources as PNG files
   • Upload images to replace existing resources
   • Both support resource picker and string expression inputs

4. Texture Packs

   • Load texture packs from ZIP archives
   • Uses index.json to map resource names to file paths
   • Expected structure:

     JSON
     {
        "pack-data": {
           "name": "Texture pack",
           "pack-version": "1.0.0",
           "game-version": "1.0.0"
        }, // pack-data is optional.
        "textures": {
           "<Resource-name>": "<new/file/directory/relative/to/index>"
        }
     }
     

     Texture packs only support images, not audios yet.

Implementation Details:

• Uses JSZip library (bundled in initialization code)
• Async operations for file handling
• Creates temporary file input elements for uploads
• Converts images to/from base64 for storage and manipulation
• PIXI.js texture management for resource replacement
• Searches up to specified depth for index.json in ZIP structures

Use Cases:

• Save/load game data
• User-generated content
• Modding support through texture packs
• Export/import configurations
• Custom skins/themes

The extension enables web-based games to interact with the user's file system in a browser-safe manner.

How to use the extension

add an action like Upload a zipfile Upload image to resource Upload a text file to variable
it pretty much does what it sounds like it will do

Checklist

• I've followed all of the best practices.
• I confirm that this extension can be integrated to this GitHub repository, distributed and MIT licensed.
• I am aware that the extension may be updated by anyone, and do not need my explicit consent to do so.

Example file

My project119.zip

Extension file

Files(2).zip

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Extension by @moolbie

You can update the extension on this "Pull Request" by commenting the update command: in the comment field, type !update, then drag and drop a zip file with your extension file in the commenting field, like how you initially submitted the extension. It should look like this:

!update [MyExtension.zip](https://github.com/GDevelopApp/GDevelop-extensions/files/12709661/MyExtension.zip)

It can take a few seconds for the file to fully upload and show as the above. Once it is like shown above, click "Comment" and let the bot do the rest!

[moolbie]

@4ian

[moolbie]

dude are there seriously 0 mods here... extensions dead?

[CreatorADOfficial]

@moolbie hello bro, btw it already exists in gdevelop so they probably don't need it.

[CreatorADOfficial]

@moolbie it's called "upload download text file"

[moolbie]

@moolbie it's called "upload download text file"

no. this upload downloads any file. Images and zipfiles too! not just textfiles

[CreatorADOfficial]

@moolbie it's called "upload download text file"

no. this upload downloads any file. Images and zipfiles too! not just textfiles

Cool!

[CreatorADOfficial]

But i don't think 4ian will respond because he is the founder of gdevelop and he just makes videos and code! Try other contributors, you can tag D8H!

[moolbie]

But i don't think 4ian will respond because he is the founder of gdevelop and he just makes videos and code! Try other contributors, you can tag D8H!

4ian does extension reviews, hes much more than just the face of gdevelop