Hi,

I’m trying to inject javascript code on each page load but it fails on the first load every time. If I reload the page it works. How do I fix this? Is there something I’ve missed in the code below?

The printfs work but the js-code does not get injected.

#include <gtk/gtk.h>

#include <webkit/webkit.h>

GtkWidget *window;

GtkWidget *webview;

static void handle_script_message(WebKitUserContentManager *manager, JSCValue* value, gpointer user_data) {

                             printf("handle_script_message()%s\n", value);

}

static void web_view_load_changed(WebKitWebView *web_view, WebKitLoadEvent load_event, gpointer user_data) {

                             switch(load_event) {

                                                          case WEBKIT_LOAD_FINISHED:

                                                                                       printf("WEBKIT_LOAD_FINISHED %s\n", webkit_web_view_get_uri(web_view));

                                                                                       WebKitUserScript *script = webkit_user_script_new(

                                                                                                                    "window.test = 12345; console.log(window.test);",

                                                                                                                    WEBKIT_USER_CONTENT_INJECT_ALL_FRAMES,

                                                                                                                    WEBKIT_USER_SCRIPT_INJECT_AT_DOCUMENT_END,

                                                                                                                    NULL,

                                                                                                                    NULL

                                                                                       );

                                                                                       WebKitUserContentManager *manager = webkit_web_view_get_user_content_manager(web_view);

                                                                                       webkit_user_content_manager_add_script(

                                                                                                                    manager,

                                                                                                                    script

                                                                                       );

                                                                                       webkit_user_script_unref(script);

                                                                                       printf("SCRIPTS LOADED\n");

                                                          break;

                             }

}

static void activate(GtkApplication* app, gpointer user_data) {

                             window = gtk_application_window_new (app);

                             gtk_window_set_title(GTK_WINDOW (window), "Webkit Test");

                             gtk_window_set_default_size(GTK_WINDOW (window), 800, 600);

                             // Create a browser instance

                             webview = webkit_web_view_new();

                             WebKitSettings *settings = webkit_web_view_get_settings (WEBKIT_WEB_VIEW(webview));

                             g_object_set(G_OBJECT(settings), "enable-developer-extras", TRUE, NULL);

                             WebKitUserContentManager *manager = webkit_web_view_get_user_content_manager(WEBKIT_WEB_VIEW(webview));

                             g_signal_connect(manager, "script-message-received::testjs", G_CALLBACK(handle_script_message), NULL);

                             webkit_user_content_manager_register_script_message_handler(manager, "testjs", NULL);

                             g_signal_connect(webview, "load-changed", G_CALLBACK(web_view_load_changed), NULL);

                             webkit_web_view_load_uri(WEBKIT_WEB_VIEW(webview), "https://mytestserver");

                             gtk_window_set_child(GTK_WINDOW (window), webview);

                             gtk_window_present(GTK_WINDOW(window));

                             WebKitWebInspector *inspector = webkit_web_view_get_inspector (WEBKIT_WEB_VIEW(webview));

                             webkit_web_inspector_show (WEBKIT_WEB_INSPECTOR(inspector));

}

int main(int argc, char *argv[]) {

                             GtkApplication *app;

                             int status;

                             app = gtk_application_new ("my.test.app", G_APPLICATION_DEFAULT_FLAGS);

                             g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);

                             status = g_application_run (G_APPLICATION (app), argc, argv);

                             g_object_unref (app);

                             return status;

}

Regards, Erik