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jwt.go
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jwt.go
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package jwt
import (
"context"
"fmt"
"net/http"
"os"
"strings"
u "github.com/TOIFLMSC/spyfall-web-backend/internal/app/utils"
"github.com/TOIFLMSC/spyfall-web-backend/internal/app/model"
jwt "github.com/dgrijalva/jwt-go"
)
// JwtAuthentication var
var JwtAuthentication = func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
notAuth := []string{"/user/new", "/user/login"}
requestPath := r.URL.Path
for _, value := range notAuth {
if value == requestPath {
next.ServeHTTP(w, r)
return
}
}
response := make(map[string]interface{})
tokenHeader := r.Header.Get("Authorization")
if tokenHeader == "" {
response = u.Message(false, "Missing auth token")
w.WriteHeader(http.StatusForbidden)
w.Header().Add("Content-Type", "application/json")
u.Respond(w, response)
return
}
splitted := strings.Split(tokenHeader, " ")
if len(splitted) != 2 {
response = u.Message(false, "Invalid/Malformed auth token")
w.WriteHeader(http.StatusForbidden)
w.Header().Add("Content-Type", "application/json")
u.Respond(w, response)
return
}
tokenPart := splitted[1]
tk := &model.Token{}
token, err := jwt.ParseWithClaims(tokenPart, tk, func(token *jwt.Token) (interface{}, error) {
return []byte(os.Getenv("token_password")), nil
})
if err != nil {
response = u.Message(false, "Malformed authentication token")
w.WriteHeader(http.StatusForbidden)
w.Header().Add("Content-Type", "application/json")
u.Respond(w, response)
return
}
if !token.Valid {
response = u.Message(false, "Token is not valid.")
w.WriteHeader(http.StatusForbidden)
w.Header().Add("Content-Type", "application/json")
u.Respond(w, response)
return
}
fmt.Sprintf("User %d", tk.UserID)
ctx := context.WithValue(r.Context(), "user", tk.UserID)
r = r.WithContext(ctx)
next.ServeHTTP(w, r)
})
}