example-lua

This extension serves as a comprehensive reference implementation showcasing most of the available methods in Envoy's Lua HTTP filter API.

Example features in the extension

• Request and response header manipulation (get, add, replace, remove, iterate)
• Multiple logging levels (trace, debug, info, warn, err, critical)
• Stream information access (protocol, route name, addresses, SNI)
• Dynamic metadata for inter-filter communication
• SSL/TLS connection inspection (certificates, cipher suites, TLS version)
• Route and virtual host metadata access
• Body handling (streaming with bodyChunks, buffered with body)
• HTTP calls to external services
• Direct response generation
• Cryptographic operations (signature verification)
• Utility functions (base64 encoding, timestamps)

This extension is intended as a learning resource and starting point for developing custom Lua extensions. Most functionality is commented out by default to prevent unintended behavior - uncomment sections as needed.