Transport dialer: setting nil for wasm build (#21451)

* Transport dialer: setting nil for wasm build

* license

sdk/azcore/runtime/transport_default_dialer_other.go

@@ -0,0 +1,15 @@
+//go:build !wasm
+
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package runtime
+
+import (
+	"context"
+	"net"
+)
+
+func defaultTransportDialContext(dialer *net.Dialer) func(context.Context, string, string) (net.Conn, error) {
+	return dialer.DialContext
+}

sdk/azcore/runtime/transport_default_dialer_wasm.go

@@ -0,0 +1,15 @@
+//go:build (js && wasm) || wasip1
+
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package runtime
+
+import (
+	"context"
+	"net"
+)
+
+func defaultTransportDialContext(dialer *net.Dialer) func(context.Context, string, string) (net.Conn, error) {
+	return nil
+}

sdk/azcore/runtime/transport_default_http_client.go

@@ -18,10 +18,10 @@ var defaultHTTPClient *http.Client
 func init() {
 	defaultTransport := &http.Transport{
 		Proxy: http.ProxyFromEnvironment,
-		DialContext: (&net.Dialer{
+		DialContext: defaultTransportDialContext(&net.Dialer{
 			Timeout:   30 * time.Second,
 			KeepAlive: 30 * time.Second,
-		}).DialContext,
+		}),
 		ForceAttemptHTTP2:     true,
 		MaxIdleConns:          100,
 		IdleConnTimeout:       90 * time.Second,