Protocol::HTTP2(3pm)

Usage

    use Protocol::HTTP2;
    # get protocol identification string for secure connections
    print Protocol::HTTP2::ident_tls;           # h2
    # get protocol identification string for non-secure connections
    print Protocol::HTTP2::ident_plain;         # h2c

Overview

Protocol::HTTP2 is HTTP/2 protocol implementation (RFC 7540 <https://tools.ietf.org/html/rfc7540>) with stateful decoders/encoders of HTTP/2 frames. You may use this module to implement your own HTTP/2 client/server/intermediate on top of your favorite event loop over plain or tls socket (see examples).

Status

Current status - beta. Structures, module names and methods seems like stable. I've started this project to understand internals of HTTP/2 and may be it will never become production, but at least it works.

    | Spec                    |      status     |
    | ----------------------- | --------------- |
    | Negotiation             |   ALPN, NPN,    |
    |                         | Upgrade, direct |
    | Preface                 |        +        |
    | Headers (de)compression |        +        |
    | Stream states           |        +        |
    | Flow control            |        ±        |
    | Stream priority         |        ±        |
    | Server push             |        +        |
    | Connect method          |        -        |
    | Frame           | encoder | decoder |
    | --------------- |:-------:|:-------:|
    | DATA            |    ±    |    +    |
    | HEADERS         |    +    |    +    |
    | PRIORITY        |    +    |    +    |
    | RST_STREAM      |    +    |    +    |
    | SETTINGS        |    +    |    +    |
    | PUSH_PROMISE    |    +    |    +    |
    | PING            |    +    |    +    |
    | GOAWAY          |    +    |    +    |
    | WINDOW_UPDATE   |    +    |    +    |
    | CONTINUATION    |    ±    |    +    |

- -- not implemented

± -- incomplete

+ -- implemented (may even work)

Modules

Protocol::HTTP2::Client

Client protocol decoder/encoder with constructor of requests

Protocol::HTTP2::Server

Server protocol decoder/encoder with constructor of responses/pushes

Protocol::HTTP2::Connection

Main low level module for protocol logic and state processing. Connection object is a mixin of Protocol::HTTP2::Frame (frame encoding/decoding), Protocol::HTTP2::Stream (stream operations) and Protocol::HTTP2::Upgrade (HTTP/1.1 Upgrade support)

Protocol::HTTP2::HeaderCompression

Module implements HPACK - Header Compression for HTTP/2 (RFC 7541 <https://tools.ietf.org/html/rfc7541>).

Protocol::HTTP2::Constants

Module contains all defined in HTTP/2 protocol constants and default values

Protocol::HTTP2::Trace

Module for debugging. You can setup HTTP2_DEBUG environment variable to change verbosity of the module (output to STDOUT). Default level is error.

    $ export HTTP2_DEBUG=debug
    $ perl ./http2_program

Releases

4 releases since Debian 10 (Buster); the text changed 3 times.

10
11
12
13