2 tofuproxy -- HTTP proxy with TLS certificates management
3 Copyright (C) 2021 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/>.
29 "github.com/dustin/go-humanize"
30 "go.stargrave.org/tofuproxy/caches"
31 "go.stargrave.org/tofuproxy/fifos"
32 "go.stargrave.org/tofuproxy/rounds"
36 transport = http.Transport{
37 DialContext: (&net.Dialer{
39 KeepAlive: time.Minute,
41 MaxIdleConns: http.DefaultTransport.(*http.Transport).MaxIdleConns,
42 IdleConnTimeout: http.DefaultTransport.(*http.Transport).IdleConnTimeout * 2,
43 TLSHandshakeTimeout: time.Minute,
44 DialTLSContext: dialTLS,
45 ForceAttemptHTTP2: true,
47 proxyHeaders = map[string]struct{}{
57 w http.ResponseWriter,
61 func roundTrip(w http.ResponseWriter, req *http.Request) {
62 fifos.LogReq <- fmt.Sprintf("%s %s", req.Method, req.URL)
63 host := strings.TrimSuffix(req.URL.Host, ":443")
64 for _, round := range []Round{
67 rounds.RoundRedditOld,
68 rounds.RoundHabrImage,
70 if cont, _ := round(host, nil, w, req); !cont {
75 reqFlags := []string{}
78 caches.HTTPAuthCacheM.RLock()
79 if creds, ok := caches.HTTPAuthCache[req.URL.Host]; ok {
80 req.SetBasicAuth(creds[0], creds[1])
83 caches.HTTPAuthCacheM.RUnlock()
86 resp, err := transport.RoundTrip(req)
88 fifos.LogErr <- fmt.Sprintf("%s\t%s", req.URL.Host, err.Error())
89 http.Error(w, err.Error(), http.StatusBadGateway)
93 if resp.StatusCode == http.StatusUnauthorized {
95 caches.HTTPAuthCacheM.Lock()
97 delete(caches.HTTPAuthCache, req.URL.Host)
101 fifos.LogVarious <- fmt.Sprintf(
102 "%s %s\tHTTP authorization required", req.Method, req.URL.Host,
104 user, pass, err := authDialog(host, resp.Header.Get("WWW-Authenticate"))
106 caches.HTTPAuthCacheM.Unlock()
107 fifos.LogErr <- fmt.Sprintf("%s\t%s", req.URL.Host, err.Error())
108 http.Error(w, err.Error(), http.StatusInternalServerError)
111 caches.HTTPAuthCache[req.URL.Host] = [2]string{user, pass}
112 caches.HTTPAuthCacheM.Unlock()
113 req.SetBasicAuth(user, pass)
114 fifos.LogHTTPAuth <- fmt.Sprintf("%s %s\t%s", req.Method, req.URL, user)
118 reqFlags = append(reqFlags, "auth")
120 if resp.TLS != nil && resp.TLS.NegotiatedProtocol != "" {
121 reqFlags = append(reqFlags, resp.TLS.NegotiatedProtocol)
124 for k, vs := range resp.Header {
125 if _, ok := proxyHeaders[k]; ok {
128 for _, v := range vs {
133 for _, round := range []Round{
134 rounds.RoundDenyFonts,
135 rounds.RoundTranscodeWebP,
136 rounds.RoundTranscodeJXL,
137 rounds.RoundTranscodeAVIF,
138 rounds.RoundRedirectHTML,
140 cont, err := round(host, resp, w, req)
142 http.Error(w, err.Error(), http.StatusBadGateway)
150 for h := range proxyHeaders {
151 if v := resp.Header.Get(h); v != "" {
155 w.WriteHeader(resp.StatusCode)
156 n, err := io.Copy(w, resp.Body)
158 log.Printf("Error during %s: %+v\n", req.URL, err)
162 "%s %s\t%s\t%s\t%s\t%s",
165 resp.Header.Get("Content-Type"),
166 humanize.IBytes(uint64(n)),
167 strings.Join(reqFlags, ","),
169 if resp.StatusCode == http.StatusOK {
172 fifos.LogNonOK <- msg