1 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 2 // use this file except in compliance with the License. You may obtain a copy of 3 // the License at 4 // 5 // http://www.apache.org/licenses/LICENSE-2.0 6 // 7 // Unless required by applicable law or agreed to in writing, software 8 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 9 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 10 // License for the specific language governing permissions and limitations under 11 // the License. 12 13 // Package cookies provides cookies utilities. 14 package cookies 15 16 import ( 17 "bytes" 18 "encoding/base64" 19 "fmt" 20 "strconv" 21 ) 22 23 // DecodeCookie decodes a Base64-encoded cookie, and returns its component 24 // parts. 25 func DecodeCookie(cookie string) (name string, created int64, err error) { 26 data, err := base64.RawURLEncoding.DecodeString(cookie) 27 if err != nil { 28 return "", 0, err 29 } 30 const partCount = 3 31 parts := bytes.SplitN(data, []byte(":"), partCount) 32 t, err := strconv.ParseInt(string(parts[1]), 16, 64) 33 if err != nil { 34 return "", 0, fmt.Errorf("invalid timestamp: %w", err) 35 } 36 return string(parts[0]), t, nil 37 } 38