first commit

service/backend/midware/midware.go

@@ -0,0 +1,52 @@
+package midware
+
+import (
+	"github.com/dgrijalva/jwt-go"
+	"github.com/gin-gonic/gin"
+	"gitlab.33.cn/chat/dtalk/pkg/api"
+	xerror "gitlab.33.cn/chat/dtalk/pkg/error"
+	"gitlab.33.cn/chat/dtalk/service/backend/model"
+	"strings"
+)
+
+func JWTAuthMiddleWare(flag bool, key string) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if flag == true {
+			c.Next()
+			return
+		}
+		authHeader := c.GetHeader("Authorization")
+		if len(authHeader) == 0 {
+			c.Set(api.ReqError, xerror.NewError(xerror.TokenError).SetExtMessage("token is empty"))
+			c.Abort()
+			return
+		}
+		stringArray := strings.SplitN(authHeader, " ", 2)
+		if !(len(stringArray) == 2 && stringArray[0] == "Bearer") {
+			c.Set(api.ReqError, xerror.NewError(xerror.TokenError).SetExtMessage("The token's format is wrong"))
+			c.Abort()
+			return
+		}
+		claims, err := parseToken(stringArray[1], key)
+		if err != nil {
+			c.Set(api.ReqError, err)
+			c.Abort()
+			return
+		}
+		c.Set("userName", claims.Username)
+		c.Next()
+	}
+}
+
+func parseToken(tokenString string, key string) (*model.Claims, error) {
+	token, err := jwt.ParseWithClaims(tokenString, &model.Claims{}, func(token *jwt.Token) (i interface{}, err error) {
+		return []byte(key), nil
+	})
+	if err != nil {
+		return nil, xerror.NewError(xerror.TokenError).SetExtMessage("invalid token")
+	}
+	if claims, ok := token.Claims.(*model.Claims); ok && token.Valid {
+		return claims, nil
+	}
+	return nil, xerror.NewError(xerror.TokenError).SetExtMessage("invalid token")
+}