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Protocol::HTTP2(3) User Contributed Perl Documentation Protocol::HTTP2(3)

Protocol::HTTP2 - HTTP/2 protocol implementation (RFC 7540) 

    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

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).

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            |        X        |
    | Stream priority         |        X        |
    | Server push             |        +        |
    | Connect method          |        -        |


    | Frame           | encoder | decoder |
    | --------------- |:-------:|:-------:|
    | DATA            |    X    |    +    |
    | HEADERS         |    +    |    +    |
    | PRIORITY        |    +    |    +    |
    | RST_STREAM      |    +    |    +    |
    | SETTINGS        |    +    |    +    |
    | PUSH_PROMISE    |    +    |    +    |
    | PING            |    +    |    +    |
    | GOAWAY          |    +    |    +    |
    | WINDOW_UPDATE   |    +    |    +    |
    | CONTINUATION    |    X    |    +    |
- -- not implemeted
X -- incomplete
+ -- implemented (may even work)

Client protocol decoder/encoder with constructor of requests

Server protocol decoder/encoder with constructor of responses/pushes

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)

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

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

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

<https://github.com/vlet/p5-Protocol-HTTP2/wiki> - Protocol::HTTP2 wiki

<http://http2.github.io/> - official HTTP/2 specification site

<http://daniel.haxx.se/http2/> - http2 explained

Copyright (C) Vladimir Lettiev.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

Vladimir Lettiev <thecrux@gmail.com>
2019-11-12 perl v5.32.1
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