zhuizhuhaomeng · May 14, 2020 15:58 · May 14, 2020
diff --git a/decode_header.go b/decode_header.go
@@ -0,0 +1,42 @@
+package main
+
+import (
+    "fmt"
+    "golang.org/x/net/http2/hpack"
+)
+
+func main() {
+    fmt.Println("nginx", "→", Encode("MYWS"))
+    fmt.Println("nginx", "→", Encode("nginx"))
+    fmt.Println("apache", "→", Encode("apache"))
+    fmt.Println("openresty+", "→", Encode("openresty+"))
+    fmt.Println("-----")
+    fmt.Println("\\x84\\xaa\\x63\\x55\\xe7", "→", Decode("\x84\xaa\x63\x55\xe7"))
+    fmt.Println("\\x84\\x1d\\x63\\x24\\xe5", "→", Decode("\x84\x1d\x63\x24\xe5"))
+    fmt.Println("\\x87\\x3d\\x65\\xaa\\xc2\\xa1\\x3e\\xbf\\xdf", "→", Decode("\x87\x3d\x65\xaa\xc2\xa1\x3e\xbf\xdf"))
+}
+
+func Encode(s string) string {
+    var result string
+
+    hd := hpack.AppendHuffmanString(nil, s)
+    hl := hpack.HuffmanEncodeLength(s) | 0x80
+
+    result += RenderByte(byte(hl))
+
+    for _, b := range hd {
+        result += RenderByte(b)
+    }
+
+    return result
+}
+
+func Decode(s string) string {
+    data := []byte(s)
+    result, _ := hpack.HuffmanDecodeToString(data[1:])
+    return result
+}
+
+func RenderByte(b byte) string {
+    return fmt.Sprintf("\\x%x", b)
+}