StdEngine (net/http compatibility wrapper)

[FumingPower3925]

Summary

Compatibility engine wrapping Go's net/http with H2C support. Works on all platforms (macOS, Windows, Linux). Implements the Engine interface.

Deliverables

• StdEngine struct implementing Engine interface
• Wrap net/http.Server with h2c.NewHandler for H2C support
• Bridge between *celeris.Context and http.ResponseWriter/*http.Request
• Same application code works across all engines (io_uring, epoll, std)
• Graceful shutdown via server.Shutdown(ctx)

Design

// StdEngine wraps net/http for cross-platform compatibility
type StdEngine struct {
    server *http.Server
    // ...
}

• H2C enabled via golang.org/x/net/http2/h2c package
• Context bridging: convert between Celeris zero-copy context and stdlib request/response
• Metrics collection: request count, latency, connections via ConnState hook

Tests

• Full integration on macOS (primary dev platform)
• Full integration on Linux (CI)
• HTTP/1.1 request/response
• H2C request/response (via h2c.NewHandler)
• Same handler code works on StdEngine and native engines
• Graceful shutdown (in-flight requests complete)
• Metrics collection accuracy

SDD Reference

Sections 2.3, 11.4

Dependencies

Depends on #2, #3, #4, #6