SaveImageSCP - ComfyUI Custom Node

A custom ComfyUI node that automatically saves generated images locally and uploads them to a remote server via SCP (Secure Copy Protocol).

Features

• 🖼️ Saves images locally in ComfyUI's output directory
• 🚀 Automatic SCP upload to predefined server locations
• 📁 Multiple profile support for different remote paths
• 🔐 Secure authentication via .env file
• ⚡ Easy profile switching via dropdown menu
• 🎛️ Optional upload toggle

Installation

1. Install the Node

Copy the files to your ComfyUI custom nodes directory:

cd ComfyUI/custom_nodes
mkdir SaveImageSCP
cd SaveImageSCP

# Copy these files:
# - SaveImageSCP.py
# - config.json
# - requirements.txt

2. Install Dependencies

pip install -r requirements.txt

Or manually install:

pip install paramiko python-dotenv

3. Configure Environment Variables

Create a .env file in your ComfyUI root directory (not in the custom_nodes folder):

cd /path/to/ComfyUI
nano .env

Add your SCP credentials:

SCP_HOST=your.server.com
SCP_PORT=22
SCP_USERNAME=your_username
SCP_PASSWORD="your_password"

Security Note: For production use, consider using SSH keys instead of passwords.

4. Configure Profiles

Edit config.json in the SaveImageSCP directory to define your upload profiles:

{
  "profiles": {
    "default": "/var/www/html/images/",
    "portfolio": "/home/user/portfolio/images/",
    "testing": "/tmp/comfyui/test/",
    "production": "/var/www/production/gallery/",
    "backup": "/mnt/backup/images/"
  }
}

Each profile maps a name to a remote server path.

Usage

In ComfyUI Workflow

1. Add the Save Image (SCP Upload) node to your workflow
2. Connect an image output to the node's input
3. Configure the node parameters:
   • filename_prefix: Prefix for saved files (default: "ComfyUI")
   • profile: Select from your configured profiles
   • upload_enabled: Toggle SCP upload on/off

Node Parameters

Parameter	Type	Description
images	IMAGE	Input images to save/upload
filename_prefix	STRING	Prefix for filenames (e.g., "myproject")
profile	DROPDOWN	Select upload destination profile
upload_enabled	BOOLEAN	Enable/disable SCP upload

Example Workflow

[Image Generation] → [SaveImageSCP]
                      ├─ filename_prefix: "artwork"
                      ├─ profile: "portfolio"
                      └─ upload_enabled: ✓

File Naming

Images are saved with sequential numbering:

• artwork_00001.png
• artwork_00002.png
• artwork_00003.png

Troubleshooting

Upload Failed

Problem: "Upload failed" error in console

Solutions:

1. Check .env credentials are correct
2. Verify server is reachable: ping your.server.com
3. Test SSH access: ssh user@your.server.com
4. Ensure remote directory exists and is writable
5. Check firewall rules allow port 22 (or your custom SSH port)

SCP Configuration Incomplete

Problem: "SCP configuration incomplete" warning

Solution: Verify all required fields in .env are set:

• SCP_HOST
• SCP_USERNAME
• SCP_PASSWORD

Profile Not Found

Problem: Profile doesn't appear in dropdown

Solutions:

1. Check config.json syntax is valid JSON
2. Restart ComfyUI after modifying config.json
3. Ensure profile name doesn't contain special characters

Permission Denied

Problem: "Permission denied" during upload

Solutions:

1. Verify remote directory permissions
2. Check user has write access to target directory
3. Try creating the directory manually first: mkdir -p /remote/path

Security Considerations

Using SSH Keys (Recommended)

For better security, use SSH key authentication instead of passwords:

1. Generate SSH key pair (if you don't have one):

ssh-keygen -t rsa -b 4096

2. Copy public key to server:

ssh-copy-id user@your.server.com

3. Modify SaveImageSCP.py to use key authentication:

# In _upload_via_scp method, replace password auth with:
ssh.connect(
    hostname=self.scp_host,
    port=self.scp_port,
    username=self.scp_username,
    key_filename='/path/to/private/key'  # Add this line
)

File Permissions

Ensure .env file has restricted permissions:

chmod 600 .env

Network Security

• Use VPN or SSH tunneling for remote servers
• Consider using non-standard SSH ports
• Enable fail2ban on server to prevent brute force attacks
• Use strong passwords or preferably SSH keys

Advanced Configuration

Custom Port

If your SSH server uses a non-standard port, update .env:

SCP_PORT=2222

Automatic Directory Creation

The node automatically creates remote directories if they don't exist. Ensure your user has permission to create directories in the parent path.

Multiple Servers

To support multiple servers, you can:

1. Create separate profile groups in config.json
2. Prefix profile names with server identifier: server1_default, server2_production

Development

Extending the Node

You can extend functionality by modifying SaveImageSCP.py:

• Add image format options (JPEG, WebP)
• Include compression settings
• Add metadata embedding
• Implement retry logic for failed uploads
• Add notification webhooks

License

This is a custom node for ComfyUI. Use freely in your projects.

Support

For issues or questions:

1. Check the troubleshooting section
2. Review ComfyUI logs for detailed error messages
3. Verify your server configuration
4. Test SCP connectivity independently

Changelog

Version 1.0.0

• Initial release
• Basic save and SCP upload functionality
• Profile support via config.json
• Environment-based authentication
• Automatic directory creation

📚 Citation

Academic Citation

If you use this codebase in your research or project, please cite:

@software{comfyui-scp-nodes,
  title = {ComfyUI SCP nodes: Save and Upload to webservers automatically with Secure Copy},
  author = {[Drift Johnson]},
  year = {2025},
  url = {https://github.com/MushroomFleet/ComfyUI-SCP-nodes},
  version = {1.0.0}
}

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