gio/gproxyresolverportal.c

   1 /* GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright 2016 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, see
  17  * <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "config.h"
  21
  22 #include "xdp-dbus.h"
  23 #include "giomodule-priv.h"
  24 #include "gportalsupport.h"
  25 #include "gproxyresolverportal.h"
  26
  27 struct _GProxyResolverPortal {
  28   GObject parent_instance;
  29
  30   GXdpProxyResolver *resolver;
  31   gboolean network_available;
  32 };
  33
  34 static void g_proxy_resolver_portal_iface_init (GProxyResolverInterface *iface);
  35
  36 G_DEFINE_TYPE_WITH_CODE (GProxyResolverPortal, g_proxy_resolver_portal, G_TYPE_OBJECT,
  37                          G_IMPLEMENT_INTERFACE (G_TYPE_PROXY_RESOLVER,
  38                                                 g_proxy_resolver_portal_iface_init)
  39                          _g_io_modules_ensure_extension_points_registered ();
  40                          g_io_extension_point_implement (G_PROXY_RESOLVER_EXTENSION_POINT_NAME,
  41                                                          g_define_type_id,
  42                                                          "portal",
  43                                                          90))
  44
  45 static gboolean
  46 ensure_resolver_proxy (GProxyResolverPortal *resolver)
  47 {
  48   if (resolver->resolver)
  49     return TRUE;
  50
  51   if (!glib_should_use_portal ())
  52     return FALSE;
  53
  54   resolver->resolver = gxdp_proxy_resolver_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,
  55                                                                    G_DBUS_PROXY_FLAGS_NONE,
  56                                                                    "org.freedesktop.portal.Desktop",
  57                                                                    "/org/freedesktop/portal/desktop",
  58                                                                    NULL,
  59                                                                    NULL);
  60
  61   resolver->network_available = glib_network_available_in_sandbox ();
  62
  63   return resolver->resolver != NULL;
  64 }
  65
  66 static void
  67 g_proxy_resolver_portal_init (GProxyResolverPortal *resolver)
  68 {
  69 }
  70
  71 static gboolean
  72 g_proxy_resolver_portal_is_supported (GProxyResolver *object)
  73 {
  74   GProxyResolverPortal *resolver = G_PROXY_RESOLVER_PORTAL (object);
  75   char *name_owner;
  76   gboolean has_portal;
  77
  78   if (!ensure_resolver_proxy (resolver))
  79     return FALSE;
  80
  81   name_owner = g_dbus_proxy_get_name_owner (G_DBUS_PROXY (resolver->resolver));
  82   has_portal = name_owner != NULL;
  83   g_free (name_owner);
  84
  85   return has_portal;
  86 }
  87
  88 static const char *no_proxy[2] = { "direct://", NULL };
  89
  90 static gchar **
  91 g_proxy_resolver_portal_lookup (GProxyResolver *proxy_resolver,
  92                                 const gchar     *uri,
  93                                 GCancellable    *cancellable,
  94                                 GError         **error)
  95 {
  96   GProxyResolverPortal *resolver = G_PROXY_RESOLVER_PORTAL (proxy_resolver);
  97   char **proxy = NULL;
  98
  99   ensure_resolver_proxy (resolver);
 100   g_assert (resolver->resolver);
 101
 102   if (!gxdp_proxy_resolver_call_lookup_sync (resolver->resolver,
 103                                              uri,
 104                                              &proxy,
 105                                              cancellable,
 106                                              error))
 107     return NULL;
 108
 109   if (!resolver->network_available)
 110     {
 111       g_strfreev (proxy);
 112       proxy = g_strdupv ((gchar **)no_proxy);
 113     }
 114
 115   return proxy;
 116 }
 117
 118 static void
 119 lookup_done (GObject      *source,
 120              GAsyncResult *result,
 121              gpointer      data)
 122 {
 123   GTask *task = data;
 124   GError *error = NULL;
 125   gchar **proxies = NULL;
 126
 127   if (!gxdp_proxy_resolver_call_lookup_finish (GXDP_PROXY_RESOLVER (source),
 128                                                &proxies,
 129                                                result,
 130                                                &error))
 131     g_task_return_error (task, error);
 132   else
 133     g_task_return_pointer (task, proxies, NULL);
 134
 135   g_object_unref (task);
 136 }
 137
 138 static void
 139 g_proxy_resolver_portal_lookup_async (GProxyResolver      *proxy_resolver,
 140                                       const gchar         *uri,
 141                                       GCancellable        *cancellable,
 142                                       GAsyncReadyCallback  callback,
 143                                       gpointer             user_data)
 144 {
 145   GProxyResolverPortal *resolver = G_PROXY_RESOLVER_PORTAL (proxy_resolver);
 146   GTask *task;
 147
 148   ensure_resolver_proxy (resolver);
 149   g_assert (resolver->resolver);
 150
 151   task = g_task_new (proxy_resolver, cancellable, callback, user_data);
 152   gxdp_proxy_resolver_call_lookup (resolver->resolver,
 153                                    uri,
 154                                    cancellable,
 155                                    lookup_done,
 156                                    g_object_ref (task));
 157   g_object_unref (task);
 158 }
 159
 160 static gchar **
 161 g_proxy_resolver_portal_lookup_finish (GProxyResolver  *proxy_resolver,
 162                                        GAsyncResult    *result,
 163                                        GError         **error)
 164 {
 165   GProxyResolverPortal *resolver = G_PROXY_RESOLVER_PORTAL (proxy_resolver);
 166   GTask *task = G_TASK (result);
 167   char **proxies;
 168
 169   proxies = g_task_propagate_pointer (task, error);
 170   if (proxies == NULL)
 171     return NULL;
 172
 173   if (!resolver->network_available)
 174     {
 175       g_strfreev (proxies);
 176       proxies = g_strdupv ((gchar **)no_proxy);
 177     }
 178
 179   return proxies;
 180 }
 181
 182 static void
 183 g_proxy_resolver_portal_finalize (GObject *object)
 184 {
 185   GProxyResolverPortal *resolver = G_PROXY_RESOLVER_PORTAL (object);
 186
 187   g_clear_object (&resolver->resolver);
 188
 189   G_OBJECT_CLASS (g_proxy_resolver_portal_parent_class)->finalize (object);
 190 }
 191
 192 static void
 193 g_proxy_resolver_portal_class_init (GProxyResolverPortalClass *resolver_class)
 194 {
 195   GObjectClass *object_class;
 196
 197   object_class = G_OBJECT_CLASS (resolver_class);
 198   object_class->finalize = g_proxy_resolver_portal_finalize;
 199 }
 200
 201 static void
 202 g_proxy_resolver_portal_iface_init (GProxyResolverInterface *iface)
 203 {
 204   iface->is_supported = g_proxy_resolver_portal_is_supported;
 205   iface->lookup = g_proxy_resolver_portal_lookup;
 206   iface->lookup_async = g_proxy_resolver_portal_lookup_async;
 207   iface->lookup_finish = g_proxy_resolver_portal_lookup_finish;
 208 }