Normalize IMGPROXY_PATH_PREFIX and IMGPROXY_HEALTH_CHECK_PATH

config/config.go

@@ -406,7 +406,7 @@ func Configure() error {
 
 	configurators.Bool(&SoReuseport, "IMGPROXY_SO_REUSEPORT")
 
-	configurators.String(&PathPrefix, "IMGPROXY_PATH_PREFIX")
+	configurators.URLPath(&PathPrefix, "IMGPROXY_PATH_PREFIX")
 
 	configurators.MegaInt(&MaxSrcResolution, "IMGPROXY_MAX_SRC_RESOLUTION")
 	configurators.Int(&MaxSrcFileSize, "IMGPROXY_MAX_SRC_FILE_SIZE")
@@ -449,7 +449,7 @@ func Configure() error {
 	configurators.Bool(&EnforceAvif, "IMGPROXY_ENFORCE_AVIF")
 	configurators.Bool(&EnableClientHints, "IMGPROXY_ENABLE_CLIENT_HINTS")
 
-	configurators.String(&HealthCheckPath, "IMGPROXY_HEALTH_CHECK_PATH")
+	configurators.URLPath(&HealthCheckPath, "IMGPROXY_HEALTH_CHECK_PATH")
 
 	if err := configurators.ImageTypes(&PreferredFormats, "IMGPROXY_PREFERRED_FORMATS"); err != nil {
 		return err

config/configurators/configurators.go

@@ -102,6 +102,25 @@ func Bool(b *bool, name string) {
 	}
 }
 
+func URLPath(s *string, name string) {
+	if env := os.Getenv(name); len(env) > 0 {
+		if i := strings.IndexByte(env, '?'); i >= 0 {
+			env = env[:i]
+		}
+		if i := strings.IndexByte(env, '#'); i >= 0 {
+			env = env[:i]
+		}
+		if len(env) > 0 && env[len(env)-1] == '/' {
+			env = env[:len(env)-1]
+		}
+		if len(env) > 0 && env[0] != '/' {
+			env = "/" + env
+		}
+
+		*s = env
+	}
+}
+
 func ImageTypes(it *[]imagetype.Type, name string) error {
 	if env := os.Getenv(name); len(env) > 0 {
 		parts := strings.Split(env, ",")

healthcheck.go

@@ -19,7 +19,7 @@ func healthcheck() int {
 
 	configurators.String(&network, "IMGPROXY_NETWORK")
 	configurators.String(&bind, "IMGPROXY_BIND")
-	configurators.String(&pathprefix, "IMGPROXY_PATH_PREFIX")
+	configurators.URLPath(&pathprefix, "IMGPROXY_PATH_PREFIX")
 
 	httpc := http.Client{
 		Transport: &http.Transport{