package serv import ( "bytes" "crypto/sha1" "encoding/hex" "io" "sort" "strings" "github.com/cespare/xxhash/v2" "github.com/dosco/super-graph/jsn" ) func mkkey(h *xxhash.Digest, k1 string, k2 string) uint64 { h.WriteString(k1) h.WriteString(k2) v := h.Sum64() h.Reset() return v } func gqlHash(b string, vars []byte) string { b = strings.TrimSpace(b) h := sha1.New() s, e := 0, 0 space := []byte{' '} var b0, b1 byte for { if ws(b[e]) { for e < len(b) && ws(b[e]) { e++ } if e < len(b) { b1 = b[e] } if al(b0) && al(b1) { h.Write(space) } } else { s = e for e < len(b) && ws(b[e]) == false { e++ } if e != 0 { b0 = b[(e - 1)] } io.WriteString(h, strings.ToLower(b[s:e])) } if e >= len(b) { break } } if vars == nil || len(vars) == 0 { return hex.EncodeToString(h.Sum(nil)) } fields := jsn.Keys([]byte(vars)) sort.Slice(fields, func(i, j int) bool { return bytes.Compare(fields[i], fields[j]) == -1 }) for i := range fields { h.Write(fields[i]) } return hex.EncodeToString(h.Sum(nil)) } func ws(b byte) bool { return b == ' ' || b == '\n' || b == '\t' || b == ',' } func al(b byte) bool { return (b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || (b >= '0' && b <= '9') }