Node / rns-mirrors / Reticulum-Go.git / files / examples / wasm / vendor / github.com / dunglas / httpsfv / binary.go

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package httpsfv

import (

"encoding/base64"

"errors"

"strings"

)

// ErrInvalidBinaryFormat is returned when the binary format is invalid.

var ErrInvalidBinaryFormat = errors.New("invalid binary format")

// marshalBinary serializes as defined in

// https://httpwg.org/specs/rfc9651.html#ser-binary.

func marshalBinary(b *strings.Builder, bs []byte) error {

if err := b.WriteByte(':'); err != nil {

return err

}

buf := make([]byte, base64.StdEncoding.EncodedLen(len(bs)))

base64.StdEncoding.Encode(buf, bs)

if _, err := b.Write(buf); err != nil {

return err

}

return b.WriteByte(':')

}

// parseBinary parses as defined in

// https://httpwg.org/specs/rfc9651.html#parse-binary.

func parseBinary(s *scanner) ([]byte, error) {

if s.eof() || s.data[s.off] != ':' {

return nil, &UnmarshalError{s.off, ErrInvalidBinaryFormat}

}

s.off++

start := s.off

for !s.eof() {

c := s.data[s.off]

if c == ':' {

// base64decode

decoded, err := base64.StdEncoding.DecodeString(s.data[start:s.off])

if err != nil {

return nil, &UnmarshalError{s.off, err}

}

s.off++

return decoded, nil

}

if !isAlpha(c) && !isDigit(c) && c != '+' && c != '/' && c != '=' {

return nil, &UnmarshalError{s.off, ErrInvalidBinaryFormat}

}

s.off++

}

return nil, &UnmarshalError{s.off, ErrInvalidBinaryFormat}

}