[Webkit-unassigned] [Bug 215880] New: [GTK] `webkit_web_extension_send_message_to_context` et al. abusing async semantics

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=215880

            Bug ID: 215880
           Summary: [GTK] `webkit_web_extension_send_message_to_context`
                    et al. abusing async semantics
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Keywords: Gtk
          Severity: Normal
          Priority: P3
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mike at vee.net
                CC: bugs-noreply at webkitgtk.org

The docs for the calls `webkit_web_extension_send_message_to_context` and `webkit_web_view_send_message_to_page` state:

> If you don't expect any reply, or you simply want to ignore it, you can pass NULL as callback.

This is probably convenient for people programming in C, but for people programming using vala or language bindings that provide high-level constructs to handle async calls, this is impossible to do. In these cases WebKitGTK will either always emit a "Message foo was not handled" warning, or to silence the warning must always send a response back, even when not required, increasing latency.

Can the warning be removed, or a proper flag introduced, or something?

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