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Prizrak-Core

XHTTP h2-flow via the host mapper

For hosts with the XHTTP transport Prizrak-Core can turn on the HTTP/2 flow governor πŸ‘». With it the server sends data no faster than the client reads it and does not fill large HTTP/2 windows. This lowers memory use on the client and helps weak devices. The Xray server needs no setup: the governor works on the client side through standard HTTP/2 flow control. If the server runs Jolymmiles/Xray-core with its own governor (h2Flow), the two work together, and the governor can be turned on from either side or both.

The governor is off by default and only acts in h2 mode: ALPN h2 or an empty ALPN. With ALPN h3 or http/1.1 the option has no effect.

{
  "xrayJson": [],
  "mihomo": [
    {
      "op": "set",
      "to": "xhttp-opts.h2-flow",
      "value": {
        "enabled": true,
        "max-stream-receive-window": 16777216,
        "max-connection-receive-window": 33554432
      }
    }
  ],
  "base64": []
}

The node gets the block in xhttp-opts:

proxies:
  - name: πŸ‡©πŸ‡ͺ Germany
    type: vless
    network: xhttp
    # ...
    xhttp-opts:
      # ...
      h2-flow:
        enabled: true
        max-stream-receive-window: 16777216
        max-connection-receive-window: 33554432

max-stream-receive-window and max-connection-receive-window are optional HTTP/2 receive windows in bytes, per stream and per connection, from 65535 to 1 GiB. With the governor on they cap the window. Without them Go’s default windows apply (4 MiB per stream), and "enabled": true is enough in value.