package auth
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import (
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"encoding/json"
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jwtLib "github.com/dgrijalva/jwt-go"
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"github.com/dgrijalva/jwt-go/request"
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"github.com/gin-gonic/gin"
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"net/http"
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"strings"
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"time"
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)
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type jwtAuthManager struct {
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secret string
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expire time.Duration
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alg string
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}
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func NewJwtAuthDriver() *jwtAuthManager{
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return &jwtAuthManager{
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secret:TokenKey,
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expire:time.Hour*8,
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alg:"HS256",
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}
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}
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func (jwtAuth *jwtAuthManager) Check(c *gin.Context) bool {
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token := c.Request.Header.Get("Authorization")
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b := "Bearer "
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if !strings.Contains(token, b) {
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return false
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}
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t := strings.Split(token, b)
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if len(t) < 2 {
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return false
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}
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var keyFunc = func(token *jwtLib.Token) (interface{},error) {
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b := []byte(jwtAuth.secret)
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return b,nil
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}
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authJwtToken, err:= request.ParseFromRequest(c.Request,request.OAuth2Extractor,keyFunc)
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if err !=nil {
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return false
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}
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c.Set("User",map[string]interface{}{
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"token":authJwtToken,
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})
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return authJwtToken.Valid
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}
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func (jwtAuth *jwtAuthManager) User(c *gin.Context) interface{}{
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var jwtToken *jwtLib.Token
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if jwtUser, exist := c.Get("User");!exist{
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tokenStr :=strings.Replace(c.Request.Header.Get("Authorization"),"Bearer ","",-1)
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if tokenStr == ""{
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return map[interface{}]interface{}{}
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}
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var err error
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jwtToken,err = jwtLib.Parse(tokenStr, func(token *jwtLib.Token) (interface{}, error) {
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b :=[]byte(jwtAuth.secret)
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return b,nil
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})
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if err !=nil {
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return nil
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}
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} else {
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jwtToken = jwtUser.(map[string]interface{})["token"].(*jwtLib.Token)
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}
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if claims,ok :=jwtToken.Claims.(jwtLib.MapClaims);ok && jwtToken.Valid{
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var user map[string]interface{}
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if err := json.Unmarshal([]byte(claims["user"].(string)), &user); err != nil {
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return nil
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}
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c.Set("User", map[string]interface{}{
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"token": jwtToken,
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"user": user,
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})
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return user
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} else {
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return nil
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}
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}
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func (jwtAuth *jwtAuthManager) Login(http *http.Request, w http.ResponseWriter, user map[string]interface{}) interface{} {
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token := jwtLib.New(jwtLib.GetSigningMethod(jwtAuth.alg))
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userStr, err := json.Marshal(user)
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token.Claims = jwtLib.MapClaims{
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"user": string(userStr),
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"exp": time.Now().Add(jwtAuth.expire).Unix(),
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}
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tokenString, err := token.SignedString([]byte(jwtAuth.secret))
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if err != nil {
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return nil
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}
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return tokenString
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}
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func (jwtAuth *jwtAuthManager) Logout(http *http.Request, w http.ResponseWriter) bool {
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return true
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}
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