HTTP

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.

TODO

• [x] HPACK (including DH compression)

• [x] HTTP/2 connection, streams, frames, ...

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

• [ ] HTTP/2 priority

• [x] support HTTP/2 server connections

• [x] ~~integrate transparently into HTTP::Server~~ (broken)

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

• [x] support HTTP/2 client connections

• [ ] ~~integrate into HTTP::Client~~

• [x] HPACK tests (HTTP/2 protocol, ...)

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

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

• [x] h2spec

Tests

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

RFC

HTTP/2

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

HTTP/1

• 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