Prepare additional wxWebRequest backends

include/wx/osx/webrequest_urlsession.h

@@ -0,0 +1,42 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/osx/webrequest_urlsession.h
+// Purpose:     wxWebRequest implementation using URLSession
+// Author:      Tobias Taschner
+// Created:     2018-10-25
+// Copyright:   (c) 2018 wxWidgets development team
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_OSX_WEBREQUEST_URLSESSION_H
+#define _WX_OSX_WEBREQUEST_URLSESSION_H
+
+#if wxUSE_WEBREQUEST_URLSESSION
+
+DECLARE_WXCOCOA_OBJC_CLASS(NSURLSession);
+DECLARE_WXCOCOA_OBJC_CLASS(NSURLTask);
+
+class WXDLLIMPEXP_NET wxWebSessionURLSession: public wxWebSession
+{
+public:
+	wxWebSessionURLSession();
+
+	~wxWebSessionURLSession();
+
+	wxWebRequest* CreateRequest(const wxString& url, int id = wxID_ANY) wxOVERRIDE;
+
+private:
+	WX_NSURLSession m_session;
+
+	wxDECLARE_NO_COPY_CLASS(wxWebSessionURLSession);
+};
+
+class WXDLLIMPEXP_NET wxWebSessionFactoryURLSession: public wxWebSessionFactory
+{
+public:
+	wxWebSession* Create() wxOVERRIDE
+	{ return new wxWebSessionURLSession(); }
+};
+
+#endif // wxUSE_WEBREQUEST_URLSESSION
+
+#endif // _WX_OSX_WEBREQUEST_URLSESSION_H