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// Copyright 2017 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package middleware
import (
"context"
"log"
"net/http"
"github.com/miniflux/miniflux/model"
"github.com/miniflux/miniflux/storage"
)
// TokenMiddleware represents a token middleware.
type TokenMiddleware struct {
store *storage.Storage
}
// Handler execute the middleware.
func (t *TokenMiddleware) Handler(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var err error
token := t.getTokenValueFromCookie(r)
if token == nil {
log.Println("[Middleware:Token] Token not found")
token, err = t.store.CreateToken()
if err != nil {
log.Println(err)
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
return
}
cookie := &http.Cookie{
Name: "tokenID",
Value: token.ID,
Path: "/",
Secure: r.URL.Scheme == "https",
HttpOnly: true,
}
http.SetCookie(w, cookie)
} else {
log.Println("[Middleware:Token]", token)
}
isTokenValid := token.Value == r.FormValue("csrf") || token.Value == r.Header.Get("X-Csrf-Token")
if r.Method == "POST" && !isTokenValid {
log.Println("[Middleware:CSRF] Invalid or missing CSRF token!")
w.WriteHeader(http.StatusBadRequest)
w.Write([]byte("Invalid or missing CSRF token!"))
} else {
ctx := r.Context()
ctx = context.WithValue(ctx, TokenContextKey, token.Value)
next.ServeHTTP(w, r.WithContext(ctx))
}
})
}
func (t *TokenMiddleware) getTokenValueFromCookie(r *http.Request) *model.Token {
tokenCookie, err := r.Cookie("tokenID")
if err == http.ErrNoCookie {
return nil
}
token, err := t.store.Token(tokenCookie.Value)
if err != nil {
log.Println(err)
return nil
}
return token
}
// NewTokenMiddleware returns a new TokenMiddleware.
func NewTokenMiddleware(s *storage.Storage) *TokenMiddleware {
return &TokenMiddleware{store: s}
}
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