A pure Crystal (but incomplete) implementation of the HTTP/2 protocol.

Requires OpenSSL 1.1 or above to support ALPN protocol negotiation, which is required for HTTP/2 over secure connections.

• HPACK (including DH compression)

• HTTP/2 connection, streams, frames, ...

• HTTP/2 flow control (in/out, whole-connection, per-stream)

• HTTP/2 priority

• support HTTP/2 server connections

• integrate transparently into HTTP::Server (broken)

• integrate into HTTP::Server::Context (http version, server-push)

• support HTTP/2 client connections

• integrate into HTTP::Client

• HPACK tests (HTTP/2 protocol, ...)

• HTTP/2 server unit tests (HTTP/2 protocol, ...)

• HTTP/2 client unit tests (HTTP/2 protocol, ...)

• h2spec

Build and run the bin/server server, then launch h2spec.

$ make bin/server

Test against HTTP:

$ bin/server
$ ./h2spec -p 9292 -S

Test against HTTPS:

$ TLS=true bin/server
$ ./h2spec -p 9292 -k -t -S

• rfc7540 HTTP/2
• rfc7541 HPACK Header Compression for HTTP/2

• rfc1945 HTTP/1.0 (informational)
• rfc2616 HTTP/1.1 (obsolete)
• rfc7230 HTTP/1.1 Message Syntax and Routing
• rfc7231 HTTP/1.1 Semantics and Content
• rfc7232 HTTP/1.1 Conditional Requests
• rfc7233 HTTP/1.1 Range Requests
• rfc7234 HTTP/1.1 Caching
• rfc7235 HTTP/1.1 Authentification