config: Use external-address directly for Swagger docs

Now `external-address` is used straightforwardly and independently of the TLS
config.

Signed-off-by: Tatiana Nesterenko <tatiana@nspcc.io>

cmd/neofs-rest-gw/main.go

@@ -18,10 +18,8 @@ import (
 )
 
 const (
-	docsURL     = baseURL + "/docs"
-	swaggerURL  = docsURL + "/swagger.json"
-	schemeHTTP  = "http"
-	schemeHTTPS = "https"
+	docsURL    = baseURL + "/docs"
+	swaggerURL = docsURL + "/swagger.json"
 )
 
 var (
@@ -65,30 +63,26 @@ func main() {
 	servers := make(openapi3.Servers, len(serverCfg.Endpoints))
 	for i, endpointInfo := range serverCfg.Endpoints {
 		if endpointInfo.ExternalAddress != "" {
-			var scheme string
-			// Determine the scheme based on whether TLS is enabled and set up e.TLSServer.
-			if endpointInfo.TLS.Enabled {
-				scheme = schemeHTTPS
-				e.TLSServer.ReadTimeout = endpointInfo.ReadTimeout
-				e.TLSServer.WriteTimeout = endpointInfo.WriteTimeout
-				e.TLSServer.IdleTimeout = endpointInfo.KeepAlive
-
-				if endpointInfo.TLS.CertCAFile != "" {
-					ca, err := loadCA(endpointInfo.TLS.CertCAFile)
-					if err != nil {
-						logger.Fatal("reading server certificate", zap.Error(err))
-					}
-					e.TLSServer.TLSConfig = &tls.Config{ClientCAs: ca}
-				}
-			} else {
-				scheme = schemeHTTP
-			}
 			servers[i] = &openapi3.Server{
-				URL: fmt.Sprintf("%s://%s%s", scheme, endpointInfo.ExternalAddress, baseURL),
+				URL: fmt.Sprintf("%s%s", endpointInfo.ExternalAddress, baseURL),
 			}
 		} else {
 			logger.Info("Endpoint with missing external-address", zap.String("address", endpointInfo.Address))
 		}
+
+		if endpointInfo.TLS.Enabled {
+			e.TLSServer.ReadTimeout = endpointInfo.ReadTimeout
+			e.TLSServer.WriteTimeout = endpointInfo.WriteTimeout
+			e.TLSServer.IdleTimeout = endpointInfo.KeepAlive
+
+			if endpointInfo.TLS.CertCAFile != "" {
+				ca, err := loadCA(endpointInfo.TLS.CertCAFile)
+				if err != nil {
+					logger.Fatal("reading server certificate", zap.Error(err))
+				}
+				e.TLSServer.TLSConfig = &tls.Config{ClientCAs: ca}
+			}
+		}
 	}
 	swagger.Servers = servers