HPACK.go

package main

import (
	"fmt"
	"os"
	"golang.org/x/net/http2/hpack"
)

func main() {
	fmt.Println(EncodeString(os.Args[1]))
}

func EncodeString(in string) string {
	hs := hpack.AppendHuffmanString(nil, in)
	length := byte(hpack.HuffmanEncodeLength(in) | 0x80)
	enc := FormatByte(length)

	for _, b := range hs {
		enc += FormatByte(b)
	}

	return fmt.Sprintf("static const u_char nginx[%d] = \"%s\";", len(hs)+1, enc)
}

func FormatByte(b byte) string {
	return fmt.Sprintf("\\x%x", b)
}