HTTP/2 Client

[marty1885]

• HPACK
  • Using HPacker for now
  • Replace HPacker with our own implementation
    • Moved from HPacker to eric-hpack to as HPacker has problems with encoding large amount of data
• sending request
  • Send request body
  • Handle sending CONTINUATION frame
  • Handle sending body larger then window size
• receiving response
  • Handle sending reading CONTINUATION frame
  • Anti request smuggling
  • handle bad sequence of frames

• Handle stream termination from the server
  • GOAWAY
  • RST_STREAM

• Reply to Ping

• Stream control
  • Respect max concurrent stream
  • Track and update our window size
  • Kill all server pushs if received (we explicitly disables them, but heck)
  • RX window tracking and updating
  • TX window tracking and updating

• Error handling mechanism
• ~~compliance test ~~ No available compliance test server
• Restart HTTP/2 connection when we run out of stream id
• Add length check for all frame parsing to ensure asserts are not triggered.
• Refactor to clean the client implementation up
  • Batch writes instead of calling send for each message
  • Look through the code and find possible integer overflows
  • Track bytes sent as required in the HTTP client API
• Change API so version selection is made by the client, not by request
• Reconnect the entire connection if we are running out of valid streamIds

Things to test before merging. Integration test won't catch any issues with HTTP/2 as drogon does not support HTTP/2 yet.

• File upload
• Download large files
  • Larger then initial window size
  • Larger then initial window size + window update increment
  • Larger then initial window size + window update increment * 2
  • Download large ISO from OpenBSD CDN
• Send multiple, concurrent POST requests

• Check sites work
  • google.com
  • example.com
  • clehaxze.tw (my blog, runs over nginx)
  • http2cdn.cdnsun.com
  • nasdaq.com
  • www.nchc.org.tw
  • amd.com
  • archlinux.org
  • openai.com
  • cloudflare.com
  • ietf.org
  • Google API services (tested against Gemini)
• File downloading test:

Final checks

• Refactor layout of HTTP 1 and HTTP/2 files
• Read through RFC 7540 and make sure behavior is correct
• Test on big endian machines

Notes

• Will NOT support HTTP/2 over cleartext (h2c)
• Trailer are treated as error
• No support for server push promise
• No priority support
• Need major refactor to reuse code for HTTP/2 server. But good enough for now

[nqf]

hi， Is there any progress?