[epiphany/pgriffis/web-extension-gtask] WebExtensions: Resolve to undefined when no return value



commit 8085b44eaf989c357522c3b22d5b126aaa0f142d
Author: Patrick Griffis <pgriffis igalia com>
Date:   Thu May 26 11:54:41 2022 -0500

    WebExtensions: Resolve to undefined when no return value

 embed/web-process-extension/ephy-webextension-api.c | 7 ++++++-
 src/webextension/ephy-web-extension-manager.c       | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/embed/web-process-extension/ephy-webextension-api.c 
b/embed/web-process-extension/ephy-webextension-api.c
index bdcf38cda..41cd1f6dc 100644
--- a/embed/web-process-extension/ephy-webextension-api.c
+++ b/embed/web-process-extension/ephy-webextension-api.c
@@ -195,12 +195,17 @@ on_ephy_message_finish (EphyWebExtensionExtension *extension,
   g_autoptr (GError) error = NULL;
   EphyMessageData *message_data = g_task_get_task_data (G_TASK (result));
   g_autofree char *json = g_task_propagate_pointer (G_TASK (result), &error);
-  g_autoptr (JSCValue) value = jsc_value_new_from_json (jsc_value_get_context 
(message_data->resolve_callback), json);
+  JSCContext *context = jsc_value_get_context (message_data->resolve_callback);
+  g_autoptr (JSCValue) value = NULL;
   g_autoptr (JSCValue) ret = NULL;
 
   if (error) {
     ret = jsc_value_function_call (message_data->reject_callback, G_TYPE_STRING, error->message, 
G_TYPE_NONE);
+  } else if (strcmp (json, "") == 0) {
+    value = jsc_value_new_undefined (context);
+    ret = jsc_value_function_call (message_data->resolve_callback, JSC_TYPE_VALUE, value, G_TYPE_NONE);
   } else {
+    value = jsc_value_new_from_json (context, json);
     ret = jsc_value_function_call (message_data->resolve_callback, JSC_TYPE_VALUE, value, G_TYPE_NONE);
   }
 }
diff --git a/src/webextension/ephy-web-extension-manager.c b/src/webextension/ephy-web-extension-manager.c
index 88a51e19c..9b647d5be 100644
--- a/src/webextension/ephy-web-extension-manager.c
+++ b/src/webextension/ephy-web-extension-manager.c
@@ -482,7 +482,7 @@ ephy_web_extension_handle_user_message (WebKitWebContext  *context,
       if (ret) {
         reply = webkit_user_message_new ("", g_variant_new_take_string (g_steal_pointer (&ret)));
       } else {
-        reply = webkit_user_message_new ("", g_variant_new_string ("{}"));
+        reply = webkit_user_message_new ("", g_variant_new_string (""));
       }
 
       webkit_user_message_send_reply (message, reply);


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