Thank you very much, it worked!
On 20 Sep 2013, at 03:07, Carlos Garcia Campos <[email protected]> wrote:
> El jue, 19-09-2013 a las 18:51 +0300, Egor Egorov escribió:
>> Hello.
>>
>> This simple reduced test case crashes at
>> JSStringGetMaximumUTF8CStringSize(). Actually I tried a few options to get
>> the string value back from webkit2 instance and googled a lot to no avail.
>>
>> It segfaults both on gtk webkit 2.0.4 and 2.1.92, both built by gcc 4.8.1 on
>> Ubuntu 13.04 with all packages updated.
>>
>> Any chance to fix it?
>
> The problem is that you are not including the JSC headers required to
> use the JSC API, simply add:
>
> #include <JavaScriptCore/JSStringRef.h>
> #include <JavaScriptCore/JSValueRef.h>
>
> And it works. I wonder why that builds, giving only compile warnings,
> though.
>
>> #include <gtk/gtk.h>
>> #include <webkit2/webkit2.h>
>>
>>
>> void gotInnerHtml(GObject *object, GAsyncResult *result, gpointer data) {
>> WebKitJavascriptResult *js_result;
>> JSValueRef value;
>> JSGlobalContextRef context;
>> GError *error = NULL;
>>
>> GtkWidget *webView = (GtkWidget *) data;
>>
>> js_result =
>> webkit_web_view_run_javascript_finish(WEBKIT_WEB_VIEW(webView), result,
>> &error);
>> if (!js_result) {
>> g_warning ("Error running javascript: %s", error->message);
>> g_error_free (error);
>> return;
>> }
>>
>> context = webkit_javascript_result_get_global_context(js_result);
>> value = webkit_javascript_result_get_value(js_result);
>>
>> if (JSValueIsString (context, value)) {
>> JSStringRef js_str_value;
>> gchar *str_value;
>> gsize str_length;
>>
>> js_str_value = JSValueToStringCopy (context, value, NULL);
>>
>> str_length = JSStringGetMaximumUTF8CStringSize(js_str_value);
>> // crashes here
>> str_value = (gchar *)g_malloc (str_length);
>>
>> JSStringGetUTF8CString (js_str_value, str_value, str_length);
>> JSStringRelease (js_str_value);
>>
>> g_print ("Script result: %s\n", str_value);
>> g_free (str_value);
>> } else {
>> g_warning ("Error running javascript: unexpected return value");
>> }
>>
>> webkit_javascript_result_unref (js_result);
>> }
>>
>> void getInnerHtml(GtkWidget *webView) {
>> webkit_web_view_run_javascript(WEBKIT_WEB_VIEW(webView), "'a little
>> string';", NULL, gotInnerHtml, webView);
>> }
>>
>> gboolean doGetHtml(gpointer data) {
>> getInnerHtml((GtkWidget *)data);
>> return FALSE;
>> }
>>
>> int main(int argc, char* argv[]) {
>> printf("Version %d.%d.%d\n", webkit_get_major_version(),
>> webkit_get_minor_version(), webkit_get_micro_version());
>> gtk_init(&argc, &argv);
>>
>> GtkWidget *mainWebWindow = gtk_window_new(GTK_WINDOW_TOPLEVEL);
>> gtk_window_set_default_size(GTK_WINDOW(mainWebWindow), 800, 600);
>>
>> GtkWidget *webView = webkit_web_view_new();
>>
>> gtk_container_add(GTK_CONTAINER(mainWebWindow), webView);
>>
>> WebKitURIRequest *request =
>> webkit_uri_request_new("http://www.google.com/";);
>> webkit_web_view_load_request(WEBKIT_WEB_VIEW(webView), request);
>>
>> GtkWidget *window1 = gtk_widget_get_toplevel(webView);
>> gtk_widget_show_all(window1);
>>
>> g_timeout_add(2000, doGetHtml, webView);
>>
>> gtk_main();
>>
>> return 0;
>> }
>>
>>
>>
>
> --
> Carlos Garcia Campos
> http://pgp.rediris.es:11371/pks/lookup?op=get&search=0xF3D322D0EC4582C3
--
Egor Egorov
http://egorfine.com/
Warning: this email may contain humor, sarcasm, parody, and perhaps even irony.
Read at your own risk.
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