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middleware.go
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middleware.go
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package rich
import (
"errors"
"fmt"
"net/http"
"github.com/dgrijalva/jwt-go"
"github.com/labstack/echo"
)
// middlewareJWT returns a JWT auth middleware.
func middlewareJWT(w *Web, signingMethod string) echo.MiddlewareFunc {
return func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
auth := c.Request().Header.Get("Authorization")
err := errors.New("身份认证错误")
if auth == "" || len(auth) < 20 {
return &echo.HTTPError{
Code: http.StatusUnauthorized,
Message: "invalid or expired jwt",
Internal: err,
}
}
auth = auth[7:]
token := new(jwt.Token)
token, err = jwt.Parse(auth, func(t *jwt.Token) (interface{}, error) {
if signingMethod != t.Method.Alg() {
return nil, fmt.Errorf("unexpected jwt signing method=%v", t.Header["alg"])
}
// 用户ID
id := t.Claims.(jwt.MapClaims)["id"]
if sign, ok := w.cache[id]; ok {
return sign, nil
}
// 设置缓存
for _, u := range w.users() {
if u.ID.String() == id {
w.cache[id] = u.Pass
return u.Pass, nil
}
}
return nil, errors.New("用户未找到")
})
if err == nil && token.Valid {
c.Set("user", token)
return next(c)
}
return &echo.HTTPError{
Code: http.StatusUnauthorized,
Message: "invalid or expired jwt",
Internal: err,
}
}
}
}