ComfyUI HTTP API

A collection of custom nodes for interacting with ComfyUI's internal HTTP APIs, such as fetching files from workflows.

Features

• 🚀 File Download: Download files from ComfyUI's input or output directories
• 🔄 Auto Download: Support automatic file download after workflow execution
• 🎯 Manual Control: Provides download button for manual downloads
• 📁 Subfolder Support: Support fetching files from subfolders
• 🛤️ Path Handling: Intelligent path parsing for files with relative paths
• 🔒 Secure Download: Uses ComfyUI's built-in API for security

Installation

Method 1: Via ComfyUI Manager

1. Search for "ComfyUI HTTP API" in ComfyUI Manager
2. Click Install

Method 2: Manual Installation

1. Navigate to ComfyUI's custom_nodes directory:

   cd ComfyUI/custom_nodes/

2. Clone this repository:

   git clone https://github.com/jtydhr88/comfyui-http-api.git

3. Restart ComfyUI

Usage

Node Description

The Fetch node is used to download files from the ComfyUI server.

Input Parameters

• type (combo): File type

  • input: Download from input directory
  • output: Download from output directory

• subfolder (string): Subfolder path (optional)

  • Leave empty for root directory
  • Example: subfolder1/subfolder2

• filename (string): File name to download

  • Can be just filename: image.png
  • Or include relative path: models/3d/mesh.obj
  • The node will automatically parse and handle paths correctly

• auto_download (boolean): Enable automatic download

  • true: Auto-download after workflow execution
  • false: Manual download via button click required

UI Elements

• download button: Manually trigger file download

Usage Examples

Example 1: Download Generated Images

1. Add a Fetch node to your workflow
2. Set parameters:
   • type: output
   • subfolder: (leave empty or specify subfolder)
   • filename: ComfyUI_00001_.png
   • auto_download: true
3. Run workflow, file will download automatically

Example 2: Manual Download of Input Files

1. Add a Fetch node
2. Set parameters:
   • type: input
   • subfolder: images
   • filename: example.jpg
   • auto_download: false
3. After running workflow, click the download button to download the file

Example 3: Download Files with Relative Paths

1. Add a Fetch node
2. Set parameters:
   • type: output
   • subfolder: (leave empty)
   • filename: 3d/models/mesh.obj (path included in filename)
   • auto_download: true
3. The node will automatically parse the path and download the file correctly

This allows automatic download to local storage after file generation.

Technical Details

API Endpoint

The plugin uses ComfyUI's built-in /view API endpoint:

GET /view?filename={filename}&type={type}&subfolder={subfolder}

Path Handling

The node intelligently handles various path formats:

• filename = "mesh.obj", subfolder = "3d" → Works normally
• filename = "3d/mesh.obj", subfolder = "" → Parses to subfolder="3d", filename="mesh.obj"
• filename = "models/3d/mesh.obj", subfolder = "output" → Merges to subfolder="output/models/3d", filename="mesh.obj"

File Structure

comfyui-http-api/
├── src/main.ts          # Frontend extension logic (TypeScript source)
├── js/main.js           # Compiled JavaScript for the frontend
├── __init__.py
├── ComfyUIHttpApi.py    # Backend node definition
├── README.md            # This document
└── LICENSE              # MIT License

Troubleshooting

Common Issues

1. "Unable to fetch file" error

   • Ensure the file exists in the specified directory
   • Check if the filename is correct (including extension)
   • Verify the subfolder path is correct
   • If using relative paths in filename, ensure the full path is valid

2. Auto-download not working

   • Ensure auto_download is set to true
   • Check if browser is blocking automatic downloads
   • Some browsers may require user interaction for downloads

3. Node not appearing in node list

   • Ensure plugin is properly installed in custom_nodes directory
   • Restart ComfyUI
   • Check console for error messages

4. Files with paths not downloading

   • The node now supports paths in filenames (e.g., folder/file.ext)
   • Ensure the complete path exists in the specified type directory

Development

Prerequisites

• Node.js and TypeScript (for frontend development)
• Python 3.10+ (for backend development)
• ComfyUI development environment

Building

# Install dependencies
npm install

# Compile TypeScript
npm run build

Contributing

Contributions are welcome! If you have ideas for improvements or have found bugs, feel free to:

• Open an issue
• Submit a pull request with proposed changes

Contribution Guidelines

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

Roadmap

• Add more comfyui internal http apis
• Support batch download of multiple files
• Add download progress display
• Support file preview functionality

License

MIT License

Contact

For questions or suggestions, please contact via:

• Submit an Issue