報錯代碼
enstr := "eyJBY2NvdW50SWQiOiIxIiwiQ2xpZW50IjoiIiwiRW1haWwiOiJ5YWt1Lm1pb3RvQGdtYWlsLmNvbSIsIk1hc3RlckZsYWciOnRydWUsImV4cCI6MTU0ODc0NTY5OSwidHlwZSI6ImVtcGxveWVlcyJ9" // {"AccountId":"1","Client":"","Email":"[email protected]","MasterFlag":true,"exp":1548745699,"type":"employees"} debytes, err := base64.StdEncoding.DecodeString(enstr) if err := nil { // ... // err output: illegal base64 data at input byte xxx } // ... |
源碼: https://golang.org/src/encoding/base64/base64.go
const ( StdPadding rune = '=' // Standard padding character NoPadding rune = -1 // No padding ) const encodeStd = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" // StdEncoding is the standard base64 encoding, as defined in // RFC 4648. var StdEncoding = NewEncoding(encodeStd) // RawStdEncoding is the standard raw, unpadded base64 encoding, // as defined in RFC 4648 section 3.2. // This is the same as StdEncoding but omits padding characters. var RawStdEncoding = StdEncoding.WithPadding(NoPadding) // NewEncoding returns a new padded Encoding defined by the given alphabet, // which must be a 64-byte string that does not contain the padding character // or CR / LF ('\r', '\n'). // The resulting Encoding uses the default padding character ('='), // which may be changed or disabled via WithPadding. func NewEncoding(encoder string) *Encoding { // ... } |
原因
jwt
的 base64
是去除填充物的, 所以不能使用 StdEncoding
應該使用 RawStdEncoding
所以代碼應該是這樣
enstr := "eyJBY2NvdW50SWQiOiIxIiwiQ2xpZW50IjoiIiwiRW1haWwiOiJ5YWt1Lm1pb3RvQGdtYWlsLmNvbSIsIk1hc3RlckZsYWciOnRydWUsImV4cCI6MTU0ODc0NTY5OSwidHlwZSI6ImVtcGxveWVlcyJ9" // {"AccountId":"1","Client":"","Email":"[email protected]","MasterFlag":true,"exp":1548745699,"type":"employees"} debytes, err := base64.RawStdEncoding.DecodeString(enstr) if err := nil { // ... // err output: illegal base64 data at input byte xxx } // ... 轉載:https://mioto.me/2018/01/problems-encountered-in-using-gobase64-standard-library/ |