1 // tofuproxy -- flexible HTTP/HTTPS proxy, TLS terminator, X.509 TOFU
2 // manager, WARC/geminispace browser
3 // Copyright (C) 2021-2024 Sergey Matveev <stargrave@stargrave.org>
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.
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.
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/>.
25 "go.stargrave.org/tofuproxy/fifos"
28 var imageExts = map[string]struct{}{
45 func isFeeder(req *http.Request) bool {
46 if strings.Contains(req.Header.Get("User-Agent"), "newsboat/") {
49 if strings.Contains(req.Header.Get("User-Agent"), "stargrave.org-feeder/") {
55 func RoundRedirectHTML(
58 w http.ResponseWriter,
61 if req.Method != http.MethodGet {
65 switch resp.StatusCode {
66 case http.StatusMovedPermanently, http.StatusPermanentRedirect:
67 redirType = "permanent"
68 case http.StatusFound, http.StatusSeeOther, http.StatusTemporaryRedirect:
72 if _, ok := imageExts[filepath.Ext(req.URL.Path)]; ok {
75 redirType = "temporary"
80 w.Header().Add("Content-Type", "text/html")
81 w.WriteHeader(http.StatusOK)
82 location := resp.Header.Get("Location")
85 <html><head><title>%d %s: %s redirection</title></head>
86 <body><a href="%s">%s</a></body></html>`,
87 resp.StatusCode, http.StatusText(resp.StatusCode),
88 redirType, location, location,
90 fifos.LogRedir <- fmt.Sprintf(
91 "%s %s\t%s\t%s", req.Method, req.URL, resp.Status, location,