golang从jwt令牌中提取声明

Question

我正在使用dgrijalva/jwt-go/package.

我想从令牌中提取有效负载,但我找不到办法.

---

示例(摘自:https://jwt.io/):

用于编码:

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9.TJVA95OrM7E2cBab30RMHrHDcEfxjoYZgeFONFh7HgQ

我想提取有效载荷:

{
  "sub": "1234567890",
  "name": "John Doe",
  "admin": true
}

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我将很感激一个例子(使用golang).

Answer 1

示例代码:

    func extractClaims(tokenStr string) (jwt.MapClaims, bool) {
        hmacSecretString := // Value
        hmacSecret := []byte(hmacSecretString)
        token, err := jwt.Parse(tokenStr, func(token *jwt.Token) (interface{}, error) {
             // check token signing method etc
             return hmacSecret, nil
        })

        if err != nil {
            return nil, false
        }

        if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
            return claims, true
        } else {
            log.Printf("Invalid JWT Token")
            return nil, false
        }
    }