jwt.go
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package jwt
import (
"context"
"fmt"
"pro2d/conf"
"pro2d/utils"
"time"
jwt "github.com/dgrijalva/jwt-go"
"google.golang.org/grpc/metadata"
)
func CreateToken(uid string) (tokenString string) {
token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
"iss": "pro2d-app-server",
"aud": "pro2d-app-server",
"nbf": time.Now().Unix(),
"exp": time.Now().Add(time.Hour).Unix(),
"sub": "pro2d",
"uid": uid,
})
tokenString, err := token.SignedString([]byte(utils.Pro2DTokenSignedString))
if err != nil {
panic(err)
}
return tokenString
}
func ParseToken(tokenStr string) string {
var clientClaims Claims
token, err := jwt.ParseWithClaims(tokenStr, &clientClaims, func(token *jwt.Token) (interface{}, error) {
if token.Header["alg"] != "HS256" {
//panic("ErrInvalidAlgorithm")
utils.Sugar.Error("ErrInvalidAlgorithm")
return nil, nil
}
return []byte(utils.Pro2DTokenSignedString), nil
})
if err != nil {
utils.Sugar.Error("jwt parse error")
return ""
}
if !token.Valid {
utils.Sugar.Error("ErrInvalidToken")
return ""
}
return clientClaims.Uid
}
// Claims defines the struct containing the token claims.
type Claims struct {
jwt.StandardClaims
Uid string
}
// 从 context 的 metadata 中，取出 token
func getTokenFromContext(ctx context.Context) (string, error) {
md, ok := metadata.FromIncomingContext(ctx)
if !ok {
return "", fmt.Errorf("ErrNoMetadataInContext")
}
// md 的类型是 type MD map[string][]string
token, ok := md["authorization"]
if !ok || len(token) == 0 {
return "", fmt.Errorf("ErrNoAuthorizationInMetadata")
}
// 因此，token 是一个字符串数组，我们只用了 token[0]
return token[0], nil
}
func CheckAuth(ctx context.Context) string {
tokenStr, err := getTokenFromContext(ctx)
if err != nil {
utils.Sugar.Errorf("get token from context error")
return ""
}
return ParseToken(tokenStr)
}
// AuthToken 自定义认证 客户端使用
type AuthToken struct {
Token string
}
func (c AuthToken) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
return map[string]string{
"authorization": c.Token,
}, nil
}
func (c AuthToken) RequireTransportSecurity() bool {
return conf.GlobalConf.TLS.Status
}