143 lines
3.3 KiB
Go
143 lines
3.3 KiB
Go
// Copyright (c) 2023 Proton AG
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//
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// This file is part of Proton Mail Bridge.
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//
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// Proton Mail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Proton Mail Bridge is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
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// Package cookies implements a persistent cookie jar which satisfies the http.CookieJar interface.
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package cookies
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"net/url"
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"sync"
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"time"
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)
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type cookiesByHost map[string][]*http.Cookie
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type Persister interface {
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GetCookies() ([]byte, error)
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SetCookies([]byte) error
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}
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// Jar implements http.CookieJar by wrapping the standard library's cookiejar.Jar.
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// The jar uses a pantry to load cookies at startup and save cookies when set.
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type Jar struct {
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jar http.CookieJar
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persister Persister
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cookies cookiesByHost
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locker sync.RWMutex
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}
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func NewCookieJar(jar http.CookieJar, persister Persister) (*Jar, error) {
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cookiesByHost, err := loadCookies(persister)
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if err != nil {
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return nil, err
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}
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for host, cookies := range cookiesByHost {
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url, err := url.Parse(host)
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if err != nil {
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continue
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}
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jar.SetCookies(url, cookies)
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}
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return &Jar{
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jar: jar,
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persister: persister,
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cookies: cookiesByHost,
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}, nil
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}
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func (j *Jar) SetCookies(u *url.URL, cookies []*http.Cookie) {
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j.locker.Lock()
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defer j.locker.Unlock()
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j.jar.SetCookies(u, cookies)
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for _, cookie := range cookies {
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if cookie.MaxAge > 0 {
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cookie.Expires = time.Now().Add(time.Duration(cookie.MaxAge) * time.Second)
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}
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}
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j.cookies[fmt.Sprintf("%v://%v", u.Scheme, u.Host)] = cookies
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}
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func (j *Jar) Cookies(u *url.URL) []*http.Cookie {
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j.locker.RLock()
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defer j.locker.RUnlock()
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return j.jar.Cookies(u)
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}
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// PersistCookies persists the cookies to disk.
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func (j *Jar) PersistCookies() error {
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j.locker.RLock()
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defer j.locker.RUnlock()
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rawCookies, err := json.Marshal(j.cookies)
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if err != nil {
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return err
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}
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return j.persister.SetCookies(rawCookies)
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}
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// loadCookies loads all non-expired cookies from disk.
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func loadCookies(persister Persister) (cookiesByHost, error) {
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rawCookies, err := persister.GetCookies()
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if err != nil {
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return nil, err
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}
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if len(rawCookies) == 0 {
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return make(cookiesByHost), nil
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}
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var cookiesByHost cookiesByHost
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if err := json.Unmarshal(rawCookies, &cookiesByHost); err != nil {
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return nil, err
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}
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for host, cookies := range cookiesByHost {
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if validCookies := discardExpiredCookies(cookies); len(validCookies) > 0 {
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cookiesByHost[host] = validCookies
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}
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}
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return cookiesByHost, nil
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}
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// discardExpiredCookies returns all the given cookies which aren't expired.
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func discardExpiredCookies(cookies []*http.Cookie) []*http.Cookie {
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var validCookies []*http.Cookie
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for _, cookie := range cookies {
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if cookie.Expires.After(time.Now()) {
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validCookies = append(validCookies, cookie)
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}
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}
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return validCookies
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}
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