r-lib/nanonext: nanonext 1.8.0

New Features

• Adds http_server() for creating HTTP and WebSocket servers with TLS/SSL support.
• Adds handler() for dynamic HTTP request handling with custom callbacks.
• Adds handler_ws() for WebSocket connections with on_message, on_open, and on_close callbacks.
• Adds handler_stream() for HTTP streaming using chunked transfer encoding, supporting Server-Sent Events (SSE), NDJSON, and custom streaming formats.
• Adds format_sse() helper for formatting Server-Sent Events messages.
• Adds static content handlers: handler_file() and handler_directory() for serving files, handler_inline() for in-memory content, and handler_redirect() for HTTP redirects.
• ncurl() and variants now accept response = TRUE to return all response headers.
• Listeners now automatically resolve port 0 to the actual port assigned by the OS. The listener's url attribute is updated when the listener starts.
• Adds race_aio() to wait for and return the index of the first resolved Aio in a list of Aios.

Updates

• Closing an already closed stream now returns 'errorValue' 7 | Object closed rather than error.
• random() now only accepts 'n' between 1 and 1024. Supplying 0 will error (#238).
• Fixes a potential crash when random() or write_cert() is called in a fresh session before any other TLS-related functions have been called, and nanonext has been compiled against a system Mbed TLS with PSA crypto enabled. (#242).
• Fixes a potential crash when a serialization hook errors (#225).
• Performance improvements for serialization, streaming, and async sends.
• Bundled 'libmbedtls' updated to latest 3.6.5 LTS branch release (#234).
• Building from source no longer requires xz.