PDF Document Loader

PDF (Portable Document Format) is a file format developed by Adobe for presenting documents consistently across software platforms. This module provides functionality to load and process PDF files using pdf.js.

This module provides a sophisticated PDF document loader that can:

• Load single or multiple PDF files
• Split documents by page or file
• Support base64 encoded files
• Handle file storage integration
• Process content with text splitters
• Support legacy PDF versions
• Customize metadata extraction

Inputs

Required Parameters

• PDF File: The PDF file(s) to process (.pdf extension)
• Usage: Choose between:
  • One document per page
  • One document per file

Optional Parameters

• Text Splitter: A text splitter to process the extracted content
• Use Legacy Build: Whether to use legacy PDF.js build
• Additional Metadata: JSON object with additional metadata
• Omit Metadata Keys: Comma-separated list of metadata keys to omit

Outputs

• Document: Array of document objects containing metadata and pageContent
• Text: Concatenated string from pageContent of documents

Features

• Multiple file support
• Page-level splitting
• Legacy version support
• Text extraction
• Metadata handling
• Error handling
• Memory-efficient processing

Processing Modes

Per Page Mode

• Each page becomes a document
• Preserves page numbers
• Individual page metadata
• Granular content access

Per File Mode

• Entire PDF as one document
• Combined content
• Single metadata set
• Memory efficient

Document Structure

Each document contains:

• pageContent: Extracted text content
• metadata:
  • source: Original file path
  • pdf: PDF-specific metadata
  • page: Page number (in per-page mode)
  • Additional custom metadata

File Handling

Local Files

• Direct file loading
• Base64 encoded content
• Multiple file support

Storage Integration

• File storage system support
• Organization-based storage
• Chatflow-based storage

Notes

• Uses pdf.js for extraction
• Legacy version support
• Memory-efficient processing
• Error handling for invalid files
• Support for large PDFs
• Flexible output formats
• Metadata customization
• Text encoding handling