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Read multiple files from disk

https://n8nworkflows.xyz/workflows/read-multiple-files-from-disk-578

Read multiple files from disk

1. Workflow Overview

This workflow is designed to read multiple binary files from disk, specifically targeting all JPEG image files located in the /data/lol/ directory. It serves as a companion example for the "Read Binary Files" node documentation, demonstrating how to trigger and process multiple files matching a given file path pattern.

Logical blocks included:

  • 1.1 Manual Trigger: Initiates the workflow execution on demand.
  • 1.2 Binary File Reading: Reads multiple files from a specified directory path pattern and outputs their binary content.

2. Block-by-Block Analysis

1.1 Manual Trigger

  • Overview:
    This block provides a manual execution starting point for the workflow, allowing the user to trigger reading files at any time without external input.

  • Nodes Involved:

    • On clicking 'execute'

  • Node Details:

    • Node Name: On clicking 'execute'
    • Type: Manual Trigger
    • Technical Role: Entry point node that waits for a manual trigger to start the workflow.
    • Configuration Choices: No parameters configured; default manual trigger behavior.
    • Key Expressions/Variables: None.
    • Input Connections: None (start node).
    • Output Connections: Connected to Read Binary Files node.
    • Version Requirements: Compatible with n8n version 0.100.0 and later where manual trigger is supported.
    • Potential Failures: None typical; user must manually trigger.
    • Sub-workflow Reference: None.

1.2 Binary File Reading

  • Overview:
    This block reads all files matching the pattern /data/lol/*.jpg from the local filesystem, loading their binary content into the workflow for further processing.

  • Nodes Involved:

    • Read Binary Files

  • Node Details:

    • Node Name: Read Binary Files
    • Type: Read Binary Files
    • Technical Role: Reads multiple binary files from disk based on glob file selector input.
    • Configuration Choices:
      • File Selector: /data/lol/*.jpg - uses a glob pattern to select all JPG files in the specified directory.
    • Key Expressions/Variables: None beyond the static file selector string.
    • Input Connections: Receives trigger from the manual trigger node.
    • Output Connections: None; terminal node in this workflow.
    • Version Requirements: Requires n8n version 0.150.0 or later for glob pattern support in the Read Binary Files node.
    • Potential Failures:
      • Path does not exist or is inaccessible (permissions).
      • No files matching pattern found (empty output).
      • File read errors (locked files, corrupt files).
    • Sub-workflow Reference: None.

3. Summary Table

Node Name Node Type Functional Role Input Node(s) Output Node(s) Sticky Note
On clicking 'execute' Manual Trigger Workflow start trigger None Read Binary Files
Read Binary Files Read Binary Files Reads multiple JPG files from disk On clicking 'execute' None Companion workflow for Read Binary Files node docs

4. Reproducing the Workflow from Scratch

  1. Create Manual Trigger Node

    • Name: On clicking 'execute'
    • Type: Manual Trigger
    • No parameters need to be set. This node will act as the starting point for manual execution.

  2. Create Read Binary Files Node

    • Name: Read Binary Files
    • Type: Read Binary Files
    • Configuration:
      • Set File Selector to /data/lol/*.jpg to select all JPEG files in /data/lol/ directory using a glob pattern.
    • No credentials required since reading local disk files.

  3. Connect Nodes

    • Connect the output of On clicking 'execute' node to the input of the Read Binary Files node.

  4. Save and Execute Workflow

    • Save the workflow.
    • Click "Execute Workflow" manually to trigger the file reading process.

5. General Notes & Resources

Note Content Context or Link
This workflow is a companion example specifically for demonstrating the "Read Binary Files" node usage. See official n8n documentation on the Read Binary Files node for more details.
Ensure the directory /data/lol/ exists and contains .jpg files for this workflow to produce output. Local disk prerequisite
Reading files requires proper file system permissions for the n8n process user. Operating system file permissions

This documentation enables advanced users and AI agents to understand, reproduce, and extend the workflow while anticipating typical failure modes and configuration needs.