n8n Dynamic Media Library with On-Demand Downloads

This n8n workflow provides a framework for managing a dynamic media library, potentially for use with applications like Radarr, Sonarr, and Plex, by enabling on-demand downloads. It uses a webhook to trigger actions, processes incoming data, and can interact with remote systems via SSH.

What it does

This workflow outlines a process for handling requests to a media library:

1. Receives Webhook Trigger: The workflow starts by listening for incoming data via a webhook. This could be a request to download a specific media item.
2. Processes Incoming Data: It then uses an "Edit Fields (Set)" node to potentially transform or extract relevant information from the webhook payload.
3. Conditional Logic: A "Switch" node is used to route the workflow based on certain conditions in the processed data. This allows for different actions depending on the request type (e.g., "download movie", "download series episode").
4. Loop Over Items: The "Loop Over Items (Split in Batches)" node suggests that the workflow might process multiple items or actions in sequence, possibly iterating through a list of media items to be downloaded.
5. Remote Execution (SSH): The "SSH" node indicates the capability to execute commands on a remote server. This is crucial for initiating actual media downloads or interacting with media management tools (like Radarr/Sonarr) on a different machine.
6. HTTP Request: An "HTTP Request" node is present, which could be used for interacting with APIs of media management tools, cloud storage, or other external services.
7. Response Handling: The "Respond to Webhook" node allows the workflow to send a custom response back to the system that triggered it, confirming actions or providing status updates.

Prerequisites/Requirements

• n8n Instance: A running n8n instance to host the workflow.
• Webhook Source: An external system configured to send HTTP POST requests to the n8n webhook URL.
• SSH Access: SSH credentials (host, username, private key/password) for a remote server where media downloads or management commands will be executed.
• API Endpoints (Optional): If the HTTP Request node is configured, access to relevant API endpoints (e.g., Radarr, Sonarr, cloud storage).

Setup/Usage

1. Import the Workflow:
   • Download the provided JSON file for this workflow.
   • In your n8n instance, go to "Workflows" and click "New".
   • Click the "Import from JSON" button and paste the workflow JSON or upload the file.
2. Configure the Webhook:
   • Locate the "Webhook" node.
   • Copy the "Webhook URL" and configure your external system (e.g., a custom script, another automation tool) to send POST requests to this URL.
3. Configure SSH Credentials:
   • Locate the "SSH" node.
   • You will need to create an n8n credential for your SSH connection. This typically involves providing the SSH host, username, and either a private key or password.
   • Configure the "Command" field in the SSH node with the specific commands you want to execute on your remote server (e.g., radarr add movie, sonarr search series).
4. Configure HTTP Request (if applicable):
   • If the "HTTP Request" node is active, configure its URL, method, headers, and body according to the API you intend to interact with.
5. Customize Logic:
   • Adjust the "Edit Fields (Set)" node to correctly parse and extract data from your incoming webhook payload.
   • Modify the "Switch" node's conditions to define different execution paths based on your specific use cases (e.g., different media types, different actions).
   • Customize the "Respond to Webhook" node to send back appropriate responses.
6. Activate the Workflow: Once configured, activate the workflow in n8n to start listening for incoming webhook events.