golang之JWT实现的示例代码

package main

import (
  "fmt"
  "github.com/dgrijalva/jwt-go"
  "time"
)
const (
  SECRETKEY = "243223ffslsfsldfl412fdsfsdf"//私钥
)
//自定义Claims
type CustomClaims struct {
  UserId int64
  jwt.StandardClaims
}
func main() {
  //生成token
  maxAge:=60*60*24
  customClaims :=&CustomClaims{
    UserId: 11,//用户id
    StandardClaims: jwt.StandardClaims{
      ExpiresAt: time.Now().Add(time.Duration(maxAge)*time.Second).Unix(), // 过期时间，必须设置
      Issuer:"jerry",  // 非必须，也可以填充用户名，
    },
  }
  //采用HMAC SHA256加密算法
  token:=jwt.NewWithClaims(jwt.SigningMethodHS256, customClaims)
  tokenString,err:= token.SignedString([]byte(SECRETKEY))
  if err!=nil {
    fmt.Println(err)
  }
  fmt.Printf("token: %v\n", tokenString)

  //解析token
  ret,err :=ParseToken(tokenString)
  if err!=nil {
    fmt.Println(err)
  }
  fmt.Printf("userinfo: %v\n", ret)
}

//解析token
func ParseToken(tokenString string)(*CustomClaims,error) {
  token, err := jwt.ParseWithClaims(tokenString, &CustomClaims{}, func(token *jwt.Token) (interface{}, error) {
    if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
      return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
    }
    return []byte(SECRETKEY), nil
  })
  if claims, ok := token.Claims.(*CustomClaims); ok && token.Valid {
    return claims,nil
  } else {
    return nil,err
  }
}

package main

import (
  "fmt"
  "github.com/dgrijalva/jwt-go"
  "time"
)
const (
  SECRETKEY = "243223ffslsfsldfl412fdsfsdf"//私钥
)
//自定义Claims
type CustomClaims struct {
  UserId int64
  jwt.StandardClaims
}
func main() {
  //生成token
  maxAge:=60*60*24
  // Create the Claims
  //claims := &jwt.StandardClaims{
  //  //  ExpiresAt: time.Now().Add(time.Duration(maxAge)*time.Second).Unix(), // 过期时间，必须设置,
  //  //  Issuer:  "jerry",// 非必须，也可以填充用户名，
  //  //}

  //或者用下面自定义claim
  claims := jwt.MapClaims{
    "id":    11,
    "name":    "jerry",
    "exp": time.Now().Add(time.Duration(maxAge)*time.Second).Unix(), // 过期时间，必须设置,
  }

  token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
  tokenString, err := token.SignedString([]byte(SECRETKEY))
  if err!=nil {
    fmt.Println(err)
  }
  fmt.Printf("token: %v\n", tokenString)

  //解析token
  ret,err :=ParseToken(tokenString)
  if err!=nil {
    fmt.Println(err)
  }
  fmt.Printf("userinfo: %v\n", ret)
}

//解析token
func ParseToken(tokenString string)(jwt.MapClaims,error) {
  token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
    // Don't forget to validate the alg is what you expect:
    if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
      return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
    }

    // hmacSampleSecret is a []byte containing your secret, e.g. []byte("my_secret_key")
    return []byte(SECRETKEY), nil
  })
  if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
    return claims,nil
  } else {
    return nil,err
  }
}