Module h2c 

HTTP/2 over cleartext: prior-knowledge preface detection and the Upgrade: h2c request (RFC 9113 §3.3, RFC 7540 §3.2).

Enums

Preface

What the first bytes of a connection are.

Constants

PREFACE

The HTTP/2 connection preface.

SWITCHING_PROTOCOLS

The 101 reply that accepts an h2c upgrade; HTTP/2 frames follow it.

Functions

detect_preface

Classifies the start of a connection.

upgrade_settings

If req asks to upgrade to h2c, appends the decoded HTTP2-Settings payload to settings and returns true.