Crumbgrabber PDF Processing Pro
Production-ready PDF processing guidance with comprehensive error handling and support for complex workflows (forms, tables, OCR, batch operations).
Core patterns (tool-agnostic)
- Text extraction: Use robust libraries (e.g., pdfplumber) and validate output per page.
- Form workflows: Detect fields, validate data against schemas, then fill; revalidate outputs.
- Table extraction: Combine multiple extractors and normalize columns; handle merged cells explicitly.
- OCR for scanned PDFs: Preprocess pages (deskew/denoise) before OCR; store page-level confidence and flag low-confidence regions.
- Batch operations: Process PDFs page-by-page to control memory; log per-file successes/failures with timestamps and error details.
Reliability practices
- Wrap PDF operations in try/except; include filename, operation, and stack trace in logs.
- Validate inputs (paths, expected fields, schemas) before processing.
- Use structured logging with timestamps, operation, result, duration.
- Never log sensitive PDF contents; sanitize before sending to external services.
- For large jobs, checkpoint outputs (per-file artifacts) so you can resume after failures.
Troubleshooting tips
- File not found/invalid: Confirm path/permissions; verify file is not encrypted/corrupted.
- OCR quality issues: Increase DPI during rasterization, deskew, and denoise before OCR.
- Table extraction errors: Try alternate parsers/settings; manually define column boundaries when automated detection fails.
- Memory issues: Stream pages instead of loading whole documents; free resources after each file.