cerca

lean forum software (pmc local branch)
git clone http://git.permacomputing.net/repos/cerca.git # read-only access
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session.go (3863B)

      1 package session
      2 
      3 /*
      4 Copyright (c) 2019 m15o <m15o@posteo.net> . All rights reserved.
      5 Copyright (c) 2022 cblgh <m15o@posteo.net> . All rights reserved.
      6 
      7 Redistribution and use in source and binary forms, with or without modification,
      8 are permitted provided that the following conditions are met:
      9 
     10 1. Redistributions of source code must retain the above copyright notice,
     11 this list of conditions and the following disclaimer.
     12 
     13 2. Redistributions in binary form must reproduce the above copyright notice,
     14 this list of conditions and the following disclaimer in the documentation
     15 and/or other materials provided with the distribution.
     16 
     17 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
     18 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     19 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     20 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
     21 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     23 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
     24 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     25 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
     26 USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 */
     28 
     29 import (
     30 	"cerca/util"
     31 	"errors"
     32 	"fmt"
     33 	"net/http"
     34 
     35 	"github.com/gorilla/sessions"
     36 )
     37 
     38 const cookieName = "cerca"
     39 
     40 type Session struct {
     41 	Store           *sessions.CookieStore
     42 	ShortLivedStore *sessions.CookieStore
     43 }
     44 
     45 func New(authKey string, developing bool) *Session {
     46 	store := sessions.NewCookieStore([]byte(authKey))
     47 	store.Options = &sessions.Options{
     48 		HttpOnly: true,
     49 		Secure:   !developing,
     50 		MaxAge:   86400 * 30,
     51 	}
     52 	short := sessions.NewCookieStore([]byte(authKey))
     53 	short.Options = &sessions.Options{
     54 		HttpOnly: true,
     55 		// Secure: true, // TODO (2022-01-05): uncomment when served over https
     56 		MaxAge: 600, // 10 minutes
     57 	}
     58 	return &Session{
     59 		Store:           store,
     60 		ShortLivedStore: short,
     61 	}
     62 }
     63 
     64 func (s *Session) Delete(res http.ResponseWriter, req *http.Request) error {
     65 	ed := util.Describe("delete session cookie")
     66 	clearSession := func(store *sessions.CookieStore) error {
     67 		session, err := store.Get(req, cookieName)
     68 		if err != nil {
     69 			return ed.Eout(err, "get session")
     70 		}
     71 		session.Options.MaxAge = -1
     72 		err = session.Save(req, res)
     73 		return ed.Eout(err, "save expired session")
     74 	}
     75 	err := clearSession(s.Store)
     76 	if err != nil {
     77 		return err
     78 	}
     79 	err = clearSession(s.ShortLivedStore)
     80 	return err
     81 }
     82 
     83 func getValueFromSession(req *http.Request, store *sessions.CookieStore, key string) (interface{}, error) {
     84 	session, err := store.Get(req, cookieName)
     85 	if err != nil {
     86 		return nil, err
     87 	}
     88 	value, ok := session.Values[key]
     89 	if !ok {
     90 		err := errors.New(fmt.Sprintf("extracting %s from session; no such value", key))
     91 		return nil, util.Eout(err, "get session")
     92 	}
     93 	return value, nil
     94 }
     95 
     96 func (s *Session) GetVerificationCode(req *http.Request) (string, error) {
     97 	val, err := getValueFromSession(req, s.ShortLivedStore, "verificationCode")
     98 	if val == nil || err != nil {
     99 		return "", err
    100 	}
    101 	return val.(string), err
    102 }
    103 
    104 func (s *Session) Get(req *http.Request) (int, error) {
    105 	val, err := getValueFromSession(req, s.Store, "userid")
    106 	if val == nil || err != nil {
    107 		return -1, err
    108 	}
    109 	return val.(int), err
    110 }
    111 
    112 func (s *Session) Save(req *http.Request, res http.ResponseWriter, userid int) error {
    113 	session, _ := s.Store.Get(req, cookieName)
    114 	session.Values["userid"] = userid
    115 	return session.Save(req, res)
    116 }
    117 
    118 func (s *Session) SaveVerificationCode(req *http.Request, res http.ResponseWriter, code string) error {
    119 	session, _ := s.ShortLivedStore.Get(req, cookieName)
    120 	session.Values["verificationCode"] = code
    121 	return session.Save(req, res)
    122 }