FileStorageService.requireAuthenticatedUser and FolderService.requireAuthenticatedUser authorize via 'principal instanceof User', but EnhancedJwtAuthenticationToken extends JwtAuthenticationToken whose principal is the decoded Jwt - so every /api/v1/storage/* request 401'd for JWT users AFTER Spring Security had already authenticated them. This persistent 401-with-valid-session was the trigger feeding the frontend login loop. Attach the filter-resolved local User as the token principal for full accounts (User implements UserDetails, matching the form-login convention every shared instanceof check expects). Anonymous sessions keep the raw Jwt principal, preserving their existing exclusions. All other principal consumers verified safe: AuthenticationUtils checks instanceof User first, extractSupabaseId/CreditController/Team SecurityExpressions switch on the authentication type, not the principal. Co-Authored-By: Claude Opus 4.8 <[email protected]>
Stirling PDF - The Open-Source PDF Platform
Stirling PDF is a powerful, open-source PDF editing platform. Run it as a personal desktop app, in the browser, or deploy it on your own servers with a private API. Edit, sign, redact, convert, and automate PDFs without sending documents to external services.
Key Capabilities
- Everywhere you work - Desktop client, browser UI, and self-hosted server with a private API.
- 50+ PDF tools - Edit, merge, split, sign, redact, convert, OCR, compress, and more.
- Automation & workflows - No-code pipelines direct in UI with APIs to process millions of PDFs.
- Enterprise‑grade - SSO, auditing, and flexible on‑prem deployments.
- Developer platform - REST APIs available for nearly all tools to integrate into your existing systems.
- Global UI - Interface available in 40+ languages.
For a full feature list, see the docs: https://docs.stirlingpdf.com
Quick Start
docker run -p 8080:8080 docker.stirlingpdf.com/stirlingtools/stirling-pdf
Then open: http://localhost:8080
For full installation options (including desktop and Kubernetes), see our Documentation Guide.
Resources
Support
- Community Discord
- Bug Reports: Github issues
Contributing
We welcome contributions! Please see CONTRIBUTING.md for guidelines.
This project uses Task as a unified command runner for all build, dev, and test commands. Run task install to get started, or see the Developer Guide for full details.
For adding translations, see the Translation Guide.
License
Stirling PDF is open-core. See LICENSE for details.

