install go2rtc on bob

installs_on_host/go2rtc/pkg/creds/secrets.go

@@ -0,0 +1,94 @@
+package creds
+
+import (
+	"io"
+	"net/http"
+	"regexp"
+	"slices"
+	"strings"
+	"sync"
+)
+
+func AddSecret(value string) {
+	if value == "" {
+		return
+	}
+
+	secretsMu.Lock()
+	defer secretsMu.Unlock()
+
+	if slices.Contains(secrets, value) {
+		return
+	}
+
+	secrets = append(secrets, value)
+	secretsReplacer = nil
+}
+
+var secrets []string
+var secretsMu sync.Mutex
+var secretsReplacer *strings.Replacer
+var userinfoRegexp *regexp.Regexp
+
+func getReplacer() *strings.Replacer {
+	secretsMu.Lock()
+	defer secretsMu.Unlock()
+
+	if secretsReplacer == nil {
+		oldnew := make([]string, 0, 2*len(secrets))
+		for _, s := range secrets {
+			oldnew = append(oldnew, s, "***")
+		}
+		secretsReplacer = strings.NewReplacer(oldnew...)
+	}
+
+	if userinfoRegexp == nil {
+		userinfoRegexp = regexp.MustCompile(`://[` + userinfo + `]+@`)
+	}
+
+	return secretsReplacer
+}
+
+// Uniform Resource Identifier (URI)
+// https://datatracker.ietf.org/doc/html/rfc3986
+const (
+	unreserved = `A-Za-z0-9-._~`
+	subdelims  = `!$&'()*+,;=`
+	userinfo   = unreserved + subdelims + `%:`
+)
+
+func SecretString(s string) string {
+	re := getReplacer()
+	s = userinfoRegexp.ReplaceAllString(s, `://***@`)
+	return re.Replace(s)
+}
+
+func SecretWrite(w io.Writer, s string) (n int, err error) {
+	re := getReplacer()
+	s = userinfoRegexp.ReplaceAllString(s, `://***@`)
+	return re.WriteString(w, s)
+}
+
+func SecretWriter(w io.Writer) io.Writer {
+	return &secretWriter{w}
+}
+
+type secretWriter struct {
+	w io.Writer
+}
+
+func (s *secretWriter) Write(b []byte) (int, error) {
+	return SecretWrite(s.w, string(b))
+}
+
+func SecretResponse(w http.ResponseWriter) http.ResponseWriter {
+	return &secretResponse{w}
+}
+
+type secretResponse struct {
+	http.ResponseWriter
+}
+
+func (s *secretResponse) Write(b []byte) (int, error) {
+	return SecretWrite(s.ResponseWriter, string(b))
+}