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/>.
27 "go.stargrave.org/tofuproxy/fifos"
30 const CmdDWebP = "dwebp"
32 func RoundTranscodeWebP(
35 w http.ResponseWriter,
38 if resp.Header.Get("Content-Type") != "image/webp" {
41 tmpFd, err := os.CreateTemp("", "tofuproxy.*.webp")
45 defer os.Remove(tmpFd.Name())
47 defer resp.Body.Close()
48 if _, err = io.Copy(tmpFd, resp.Body); err != nil {
49 log.Printf("Error during %s: %+v\n", req.URL, err)
53 cmd := exec.Command(CmdDWebP, tmpFd.Name(), "-o", "-")
54 data, err := cmd.Output()
58 w.Header().Add("Content-Type", "image/png")
59 w.WriteHeader(http.StatusOK)
61 fifos.LogVarious <- fmt.Sprintf(
62 "%s %s\tWebP transcoded to PNG", req.Method, req.URL,