2026.05.25

This release introduces a significant shift in the open-source licensing to AGPLv3 and brings major enhancements to content type detection. We've implemented a multi-stage pipeline with heuristic fallbacks to robustly identify ZIP-based formats and images, even on non-seekable network streams. The test infrastructure has been modularized and consolidated for better developer efficiency, and the HTTP server's SSL configuration has been modernized for improved stability.

The license shifts, a wider net,
To AGPLv3, our standards set.
With content found in streams so deep,
Heuristics wake, while others sleep.
The server's light, in SSL glows,
Refactored tests, where wisdom flows.
A modular heart, a consolidated sight,
DocWire moves forward, into the light.
⚖️🔍🛡️🚀

• Features

  • AGPLv3 Licensing: Transitioned the open-source license from GPLv2 to GNU Affero General Public License version 3 (AGPLv3). This shift not only closes the "SaaS loophole" (ensuring network users receive source code), but also provides key modern advantages: explicit patent grants that protect users from litigation by contributors, compatibility with the Apache License 2.0 (facilitating integration with a wider ecosystem), and improved international legal language for global enforceability.
  • Heuristic Content Type Detection: Introduced specialized heuristic detectors for Images (BMP, WEBP) and ZIP-based containers (OOXML, ODF). These detectors prioritize performance by checking local file headers in the first 4KB before falling back to deep inspection, specifically addressing detection failures on non-seekable streams with libmagic 5.47+.

• Improvements

  • MIME Type Normalization: Signature detection now automatically normalizes legacy or non-standard MIME types returned by libmagic to modern IANA standards (e.g., text/xml to application/xml), providing a consistent target for downstream components.
  • Performance Optimization in Detectors: Updated heuristic detectors (ASP, HTML) to use std::string_view for content searching, reducing memory overhead and improving detection speed.
  • Deterministic MIME Tie-Breaking: Enhanced the data_source logic to use alphabetical tie-breaking when multiple MIME types have identical confidence levels, ensuring consistent results across platforms.
  • Modernized SSL Server Setup: Refactored httplib::SSLServer initialization to use the recommended setup callback for certificate and key configuration, aligning with the latest library API changes.

• Refactor

  • Modular Test Suite: Substantially refactored the test infrastructure by splitting the monolithic api_tests.cpp into specialized source files (core_tests.cpp, error_tests.cpp, log_tests.cpp, etc.) for improved maintainability.
  • Consolidated Test Executable: Consolidated all unit tests into a single docwire_tests binary to drastically reduce process creation overhead during comprehensive test cycles under Valgrind.

• Fixes

  • ZIP-based Format Detection: Fixed regressions in the detection of OOXML (DOCX, XLSX, PPTX) and ODF formats when processed via non-seekable streams.
  • General Stability: Resolved minor issues in the automated test suite and added missing include directives identified during code review.