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login.go
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login.go
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// Copyright 2017 luoji
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package server
import (
"encoding/json"
"net/http"
"time"
jwt "github.com/dgrijalva/jwt-go"
)
type loginHandler struct {
}
func (h *loginHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
decoder := json.NewDecoder(r.Body)
userParam := struct {
Username string `json:"username"`
Password string `json:"password"`
}{}
err := decoder.Decode(&userParam)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
defer r.Body.Close()
if userParam.Username != "admin" || userParam.Password != "admin" {
http.Error(w, "invalid login", http.StatusUnauthorized)
return
}
//generate token
expire := time.Now().Add(time.Hour * 1).Unix()
// Create the Claims
claims := userClaims{
user: user{
UserID: 1,
UserName: userParam.Username,
IsAdmin: true,
},
StandardClaims: jwt.StandardClaims{
ExpiresAt: expire,
Issuer: "login",
},
}
token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
signedToken, _ := token.SignedString(jwtSecret)
//output token
tokenResponse := struct {
Token string `json:"token"`
}{signedToken}
json.NewEncoder(w).Encode(tokenResponse)
}