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if (filename != NULL) { /* Remove the "file://" prefix from the beginning of the URI if it exists. */ fn = g_filename_from_uri (filename, NULL, NULL); if (g_file_get_contents (fn, &content, &length, NULL)) { gtk_window_set_title (GTK_WINDOW (w->window), fn); buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (w->textview)); gtk_text_buffer_set_text (buffer, content, -1); g_free (content); } else g_warning ("The file '%s' could not be read!", filename); g_free (filename); g_free (fn); } } You can use gtk_recent_chooser_get_current_uri() to retrieve the currently selected recent file, since only one item can be selected. Since we restricted the menu to only displaying local files, we need to remove the file:// prefix from the URI. If you are allowing remote files to be displayed, you may need to remove different prefixes from the URI such as http://. You can use g_filename_from_uri() to remove URI prefixes. gchar* g_filename_from_uri (const gchar *uri, gchar **hostname, GError **error); After the prefix is removed, GLib attempts to open the file. If the file was successfully opened, the window title is set to the file name and the file is opened. Otherwise, a warning is presented to the user that the file could not be opened.

Summary

When the Open button is pressed, we want to allow the user to select a file to open from a GtkFileChooserDialog. If the file is opened, it will be added to the default GtkRecentManager, which is shown in Listing 12-9.

One positive side effect from these worms is that the security community started to act more aggressively to deal with them. For example, system administrators have become more aware of the threats than they were five or ten years prior. They started deploying preventive and containment measures, and they put more processes in place to deal with the attacks. Researchers started spending a lot more time thinking about how worms spread so that new technologies to contain these attacks could be developed. Incident response teams were formed at some companies that did not already have them, and those companies formed relationships with the authorities to coordinate in the case of a widespread attack. Organizations that did not already have a disaster recovery plan in place created one. Users have also become a little (but not much) more sensitive and paranoid regarding which web sites they visit, and which e-mail attachments they open. In addition, programmers are becoming smarter about writing their code such that it is more secure. You are, after all, reading this book! In early 2002, Microsoft put all their development projects on hold, spent a lot of time examining their software, and enrolled their programmers in training courses on how to prevent security vulnerabilities. Hopefully, over time, other companies will follow suit because, if nothing else, the worms that we ve discussed have demonstrated that having a vulnerable software infrastructure is not a tenable situation.

Listing 9.5 shows that the Logout action method returns the new LogoutActionResult method. The constructor parameter to the LogoutActionResult is a RedirectToAction result that will redirect the browser to the Index action on the HomeController.

Listing 12-9. Open a File and Add It to the List of Recent Files /* Open a file selected by the user and add it as a new recent file. */ static void open_file (GtkButton *open, Widgets *w) { GtkWidget *dialog; GtkRecentManager *manager; GtkRecentData *data; GtkTextBuffer *buffer; gchar *filename, *content, *uri; gsize length; static gchar *groups[2] = { "testapp", NULL }; dialog = gtk_file_chooser_dialog_new ("Open File", GTK_WINDOW (w->window), GTK_FILE_CHOOSER_ACTION_OPEN, GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL, GTK_STOCK_OPEN, GTK_RESPONSE_OK, NULL); if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_OK) { filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog)); if (g_file_get_contents (filename, &content, &length, NULL)) { /* Create a new recently used resource. */ data = g_slice_new (GtkRecentData); data->display_name = NULL; data->description = NULL; data->mime_type = "text/plain"; data->app_name = (gchar*) g_get_application_name (); data->app_exec = g_strjoin (" ", g_get_prgname (), "%u", NULL); data->groups = groups; data->is_private = FALSE; uri = g_filename_to_uri (filename, NULL, NULL);

Summary