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PAGI-0.001017

Changes for version 0.001017 - 2026-02-11

  • New Features
    • HTTP/2 support (experimental). Requires Net::HTTP2::nghttp2. Enable with --http2 flag. Supports ALPN negotiation (h2/http1.1 over TLS), cleartext h2c via connection preface detection, WebSocket over HTTP/2 (RFC 8441), streaming responses with backpressure, and configurable protocol settings (h2_max_concurrent_streams, h2_initial_window_size, etc.)
    • Worker heartbeat monitoring for multi-worker mode. Parent process detects workers with blocked event loops via Unix pipe heartbeat and replaces them with SIGKILL + respawn. Default 50s timeout (heartbeat_timeout option, --heartbeat-timeout CLI flag). Only detects event loop starvation — async handlers using await are unaffected regardless of duration.
    • Custom access log format strings (--access-log-format). Supports atoms like %a (address), %s (status), %D (duration μs), %b (body size). Enables structured JSON logging via format string.
    • Track response body size in access log (%b atom)
  • Bug Fixes
    • Fix TLS performance cliff at 8+ concurrent connections caused by per-connection SSL context creation parsing the entire CA bundle. Shared SSL context via SSL_reuse_ctx gives ~26x throughput improvement.
    • Fix TLS in multi-worker mode — workers now SSL-upgrade connections in on_stream rather than relying on listener-level TLS
    • Fix SSE wire format to handle CRLF, LF, and bare CR line endings per the SSE specification
    • Fix multi-worker shutdown escalation — SIGKILL timer now fires correctly when workers don't exit after SIGTERM
    • Fix multi-worker parameter pass-through for server options
    • Fix flaky multi-worker TLS test
  • Improvements
    • Add on_ssl_error callback to TLS listener setup for cleaner error handling (suppresses "EV: error in callback" noise)
    • Cache Server header string to avoid per-response interpolation
    • Merge double header loop in serialize_response_start
    • Cache access log timestamp at per-second granularity
    • Cache client_host in access log to avoid per-request getpeername syscall
    • Skip HTTP/2 tests when Net::HTTP2::nghttp2 is not installed
    • Skip SSE tests when Future::IO is not installed
    • Remove unused Sys::Sendfile recommendation from cpanfile

Documentation

pagi-server
PAGI application server
PAGI::Cookbook
Recipes for Common PAGI Tasks
PAGI::Server::Compliance
HTTP/1.1, HTTP/2, WebSocket, and Security Compliance Documentation
PAGI::Spec
PAGI Specification Documentation
PAGI::Spec::Lifespan
PAGI Specification Documentation
PAGI::Spec::Tls
PAGI Specification Documentation
PAGI::Spec::Www
PAGI Specification Documentation
PAGI::Tutorial
A comprehensive guide to building async web applications with PAGI

Modules

PAGI
Perl Asynchronous Gateway Interface
PAGI::App::Cascade
Try apps in sequence until success
PAGI::App::Directory
Serve files with directory listing
PAGI::App::File
Serve static files
PAGI::App::Healthcheck
Health check endpoint app
PAGI::App::Loader
Load PAGI app from file
PAGI::App::NotFound
Customizable 404 response
PAGI::App::Proxy
HTTP reverse proxy (DEMO ONLY - NOT FOR PRODUCTION)
PAGI::App::Redirect
URL redirect app
PAGI::App::Router
Unified routing for HTTP, WebSocket, and SSE
PAGI::App::SSE::Pubsub
Pub/sub Server-Sent Events
PAGI::App::Throttle
Rate-limited request processing
PAGI::App::URLMap
Mount apps at URL path prefixes
PAGI::App::WebSocket::Broadcast
Pub/sub WebSocket broadcast
PAGI::App::WebSocket::Chat
Multi-room chat application
PAGI::App::WebSocket::Echo
Echo WebSocket messages back to sender
PAGI::App::WrapCGI
Execute CGI scripts as PAGI apps
PAGI::App::WrapPSGI
PSGI-to-PAGI adapter
PAGI::Endpoint::HTTP
Class-based HTTP endpoint handler
PAGI::Endpoint::Router
Class-based router with wrapped handlers
PAGI::Endpoint::SSE
Class-based Server-Sent Events endpoint handler
PAGI::Endpoint::WebSocket
Class-based WebSocket endpoint handler
PAGI::Lifespan
Wrap a PAGI app with lifecycle management
PAGI::Middleware
Base class for PAGI middleware
PAGI::Middleware::AccessLog
Request logging middleware
PAGI::Middleware::Auth::Basic
HTTP Basic Authentication middleware
PAGI::Middleware::Auth::Bearer
Bearer token authentication middleware
PAGI::Middleware::Builder
DSL for composing PAGI middleware
PAGI::Middleware::CORS
Cross-Origin Resource Sharing middleware
PAGI::Middleware::CSRF
Cross-Site Request Forgery protection middleware
PAGI::Middleware::ConditionalGet
Conditional GET/HEAD request handling
PAGI::Middleware::ContentLength
Auto Content-Length header middleware
PAGI::Middleware::ContentNegotiation
HTTP content negotiation middleware
PAGI::Middleware::Cookie
Cookie parsing middleware
PAGI::Middleware::Debug
Development debug panel middleware
PAGI::Middleware::ETag
ETag generation middleware
PAGI::Middleware::ErrorHandler
Exception handling middleware
PAGI::Middleware::FormBody
Form request body parsing middleware
PAGI::Middleware::GZip
Response compression middleware
PAGI::Middleware::HTTPSRedirect
Force HTTPS redirect middleware
PAGI::Middleware::Head
HEAD request handling middleware
PAGI::Middleware::Healthcheck
Health check endpoint middleware
PAGI::Middleware::JSONBody
JSON request body parsing middleware
PAGI::Middleware::Lint
Validate PAGI application compliance
PAGI::Middleware::Maintenance
Serve maintenance page when enabled
PAGI::Middleware::MethodOverride
Override HTTP method from request data
PAGI::Middleware::RateLimit
Request rate limiting middleware
PAGI::Middleware::RequestId
Unique request ID middleware
PAGI::Middleware::ReverseProxy
Handle X-Forwarded-* headers from reverse proxies
PAGI::Middleware::Rewrite
URL rewriting middleware
PAGI::Middleware::Runtime
Request timing middleware
PAGI::Middleware::SSE::Retry
Add retry hints to SSE events
PAGI::Middleware::SecurityHeaders
Security headers middleware
PAGI::Middleware::Session
Session management middleware
PAGI::Middleware::Static
Static file serving middleware
PAGI::Middleware::TrustedHosts
Host header validation middleware
PAGI::Middleware::WebSocket::Compression
WebSocket per-message compression
PAGI::Middleware::WebSocket::RateLimit
Rate limiting for WebSocket connections
PAGI::Middleware::XSendfile
Delegate file serving to reverse proxy
PAGI::Request
Convenience wrapper for PAGI request scope
PAGI::Request::BodyStream
Streaming body consumption for PAGI requests
PAGI::Request::MultiPartHandler
Async multipart/form-data parser
PAGI::Request::Negotiate
Content negotiation utilities for PAGI
PAGI::Request::Upload
Uploaded file representation
PAGI::Response
Fluent response builder for PAGI applications
PAGI::Runner
PAGI application loader and server runner
PAGI::SSE
Convenience wrapper for PAGI Server-Sent Events connections
PAGI::Server
PAGI Reference Server Implementation
PAGI::Server::AsyncFile
Non-blocking file I/O for PAGI::Server internals
PAGI::Server::Connection
Per-connection state machine
PAGI::Server::ConnectionState
Connection state tracking for HTTP requests
PAGI::Server::EventValidator
Dev-mode event field validation
PAGI::Server::Protocol::HTTP1
HTTP/1.1 protocol handler
PAGI::Server::Protocol::HTTP2
HTTP/2 protocol handler using nghttp2
PAGI::Test::Client
Test client for PAGI applications
PAGI::Test::Response
HTTP response wrapper for testing
PAGI::Test::SSE
Server-Sent Events connection for testing PAGI applications
PAGI::Test::WebSocket
WebSocket connection for testing PAGI applications
PAGI::Utils
Shared utility helpers for PAGI
PAGI::WebSocket
Convenience wrapper for PAGI WebSocket connections

Provides

PAGI::App::WrapPSGI::Writer
in lib/PAGI/App/WrapPSGI.pm
PAGI::Endpoint::Router::RouteBuilder
in lib/PAGI/Endpoint/Router.pm
PAGI::Middleware::Cookie::Jar
in lib/PAGI/Middleware/Cookie.pm
PAGI::Response::Writer
in lib/PAGI/Response.pm
PAGI::Server::Protocol::HTTP2::Session
in lib/PAGI/Server/Protocol/HTTP2.pm

Examples

Other files