go-jwt 实现 token

~~

1
go get它
2
封装他
3
cf他

Token生成

见下面的createToken函数

获取内容

见parseToken

---

完整代码：

package main

import (
    "fmt"
    "github.com/jwt-go"
    "time"
    // "reflect"
    "strconv"
)


func createToken(key string, m map[string] interface{}) string{
    token := jwt.New(jwt.SigningMethodHS256)
    claims := make(jwt.MapClaims)

    for index, val := range m {
        claims[index] = val
    }
    // fmt.Println(_map)
    token.Claims = claims
    tokenString, _ := token.SignedString([]byte(key))
    return tokenString
}
func parseToken(tokenString string, key string) (interface{}, bool){
    token, err := jwt.Parse(tokenString, 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(key), nil
    })
    if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
        return claims, true
    } else {
        fmt.Println(err)
        return "", false
    }
}

func main(){
    
    type UserInfo map[string] interface{}

    t := time.Now()
    key := "welcome to XXY's code world"
    userInfo := make(UserInfo)
    var expTime int64 = 1000 * 60 * 10
    var tokenState string
    
    userInfo["exp"] = "1515482650719371100" //  strconv.FormatInt(t.UTC().UnixNano(), 10)
    userInfo["iat"] = "0"

    tokenString := createToken(key, userInfo)
    claims, ok := parseToken(tokenString, key)
    if ok {
        oldT, _ := strconv.ParseInt(claims.(jwt.MapClaims)["exp"].(string), 10, 64)
        ct := t.UTC().UnixNano()
        c := ct - oldT
        if  c > expTime{
            ok = false
            tokenState = "Token 已过期"
        } else {
            tokenState = "Token 正常"
        }
    }else {
        tokenState = "token无效"
    }

    fmt.Println(tokenState)
    fmt.Println(claims)
}