rounds/spy.go

   1 /*
   2 tofuproxy -- HTTP proxy with TLS certificates management
   3 Copyright (C) 2021 Sergey Matveev <stargrave@stargrave.org>
   4
   5 This program is free software: you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation, version 3 of the License.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 package rounds
  19
  20 import (
  21         "fmt"
  22         "net/http"
  23         "strings"
  24
  25         "go.stargrave.org/tofuproxy/fifos"
  26 )
  27
  28 var spyDomains = []string{
  29         "google-analytics.com",
  30         "goo.gl",
  31         "ads.google.com",
  32         "googletagmanager.com",
  33         "facebook.com",
  34         "facebook.net",
  35         "fbcdn.com",
  36         "fbcdn.net",
  37         "advertising.yandex.ru",
  38         "an.yandex.ru",
  39         "awaps.yandex.ru",
  40         "bs.yandex.ru",
  41         "informer.yandex.ru",
  42         "mc.yandex.ru",
  43         "metrika.yandex.ru",
  44         "doubleclick.net",
  45         "tns-counter.ru",
  46 }
  47
  48 func IsSpy(host string) bool {
  49         for _, spy := range spyDomains {
  50                 if strings.HasSuffix(host, spy) {
  51                         return true
  52                 }
  53         }
  54         return false
  55 }
  56
  57 func RoundDenySpy(
  58         host string,
  59         resp *http.Response,
  60         w http.ResponseWriter,
  61         req *http.Request,
  62 ) (bool, error) {
  63         if IsSpy(host) {
  64                 http.NotFound(w, req)
  65                 fifos.SinkOther <- fmt.Sprintf(
  66                         "%s %s\t%d\tdeny spy",
  67                         req.Method,
  68                         req.URL.String(),
  69                         http.StatusNotFound,
  70                 )
  71                 return false, nil
  72         }
  73         return true, nil
  74 }