HTTP/2 (minimal)

Dependencies:

• #40 proxy core refactoring
• #210 Actively manage number of open file descriptors
• #215 PCAP logging

Tasks:

• [ ] Implement minimal subset of HTTP/2 protocol needed to proxy and log raw PCAP without any suppression mechanisms relying on removing or modifying headers
• [ ] Add option to downgrade HTTP/2 to HTTP/1.x as is the current SSLsplit behaviour
• [ ] Implement all upgrade paths to HTTP/2
• [ ] Add upgrade to HTTP/2 to connection log (does not include request logging of individual stream)
• [ ] Test on different platforms and with different browsers/clients

Out of scope:

• #219 Decoding binary HTTP/2 protocol, framing, header decompression, header suppression, individual stream logging (i.e. «HTTP request»)
• Support for predecessor protocols like SPDY
• Spec compliant stream priority handling
• Opportunistic Security for HTTP/2 (RFC 8164)

References:

• https://en.wikipedia.org/wiki/HTTP/2
• https://tools.ietf.org/html/rfc7540
• https://github.com/nghttp2/nghttp2
• https://github.com/phluid61/mk-hpack