Minimal HTTP/2 client example using react/socket

[masakielastic]

Hello,

I experimented with implementing a minimal HTTP/2 client using the
low-level react/socket component and wanted to ask whether something
like this could be useful as an educational example.

The goal of this example is to demonstrate how HTTP/2 frames can be
exchanged over a TLS connection using ReactPHP's socket abstraction.

The implementation intentionally avoids external HTTP/2 libraries so
that the protocol behavior can be observed at the frame level.

This example is intentionally minimal and intended for educational
purposes only. It is not a complete HTTP/2 implementation and is not
intended for production use.

The example demonstrates:

• HTTP/2 client connection preface
• SETTINGS / SETTINGS ACK exchange
• minimal HEADERS request
• simple frame parsing
• reading DATA frames

Full example and explanation:

https://gist.github.com/masakielastic/1ea71546dfdd5eb469782ba2e21492a5

Would something like this be appropriate as an example for
reactphp/socket, or would it be better kept as an external example?

If this looks useful, I would be happy to open a pull request.

Any feedback would be appreciated.

[masakielastic]

Small update to the HTTP/2 experiment mentioned earlier.

I have expanded the repository and added a minimal HTTP/2 server example
in addition to the original client script.

Repository:
https://github.com/masakielastic/http2-minimal-examples

The repository now contains:

• a minimal HTTP/2 client example
• a minimal HTTP/2 server example

Both examples are intentionally very small and avoid external HTTP/2
libraries. The goal is to demonstrate how HTTP/2 works at the frame
level using ReactPHP Socket.

Feedback is welcome.