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Channels is a transport-agnostic framework for building binary protocols over TCP, UDP, and WebSockets.

It provides an incremental middleware pipeline where raw transport data evolves into protocol-specific structures through composable adapters and handlers.

Channels itself is protocol-agnostic. Framing, parsing, serialization, and business semantics are implemented by adapters and handlers.

The concept behind this library is to apply a middleware pipeline to data flowing through communication channels.

For data coming through the channel input, two middleware components can be applied: adapters and handlers.

graph LR;
    channelInput((Input)) --> a1[/Adapter/]
    subgraph adapters
    a1 --> a2[/Adapter/]
    end
    a2 --> h1[/Handler/]
    a2 --> h2[/Handler/]

For data going through the channel output, only adapters are applicable. A built-in internal handler writes the resulting data to the underlying transport.

graph LR;
    channelOutput((Output)) --> a1[/Adapter/]
    subgraph adapters
    a1 --> a2[/Adapter/]
    end
    a2 --> transport([Transport])

Learn more about middleware.