gio/gopenuriportal.c

   1 /* GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright 2017 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 Public
  16  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "config.h"
  20
  21 #include <sys/stat.h>
  22 #include <fcntl.h>
  23 #include <errno.h>
  24 #include <string.h>
  25
  26 #include "gopenuriportal.h"
  27 #include "xdp-dbus.h"
  28 #include "gstdio.h"
  29
  30 #ifdef G_OS_UNIX
  31 #include "gunixfdlist.h"
  32 #endif
  33
  34 #ifndef O_PATH
  35 #define O_PATH 0
  36 #endif
  37 #ifndef O_CLOEXEC
  38 #define O_CLOEXEC 0
  39 #else
  40 #define HAVE_O_CLOEXEC 1
  41 #endif
  42
  43
  44 static GXdpOpenURI *openuri;
  45
  46 static gboolean
  47 init_openuri_portal (void)
  48 {
  49   static gsize openuri_inited = 0;
  50
  51   if (g_once_init_enter (&openuri_inited))
  52     {
  53       GError *error = NULL;
  54       GDBusConnection *connection = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &error);
  55
  56       if (connection != NULL)
  57         {
  58           openuri = gxdp_open_uri_proxy_new_sync (connection, 0,
  59                                                   "org.freedesktop.portal.Desktop",
  60                                                   "/org/freedesktop/portal/desktop",
  61                                                   NULL, &error);
  62           if (openuri == NULL)
  63             {
  64               g_warning ("Cannot create document portal proxy: %s", error->message);
  65               g_error_free (error);
  66             }
  67
  68           g_object_unref (connection);
  69         }
  70       else
  71         {
  72           g_warning ("Cannot connect to session bus when initializing document portal: %s",
  73                      error->message);
  74           g_error_free (error);
  75         }
  76
  77       g_once_init_leave (&openuri_inited, 1);
  78     }
  79
  80   return openuri != NULL;
  81 }
  82
  83 gboolean
  84 g_openuri_portal_open_uri (const char  *uri,
  85                            const char  *parent_window,
  86                            GError     **error)
  87 {
  88   GFile *file = NULL;
  89   GVariantBuilder opt_builder;
  90   gboolean res;
  91
  92   if (!init_openuri_portal ())
  93     {
  94       g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_INITIALIZED,
  95                    "OpenURI portal is not available");
  96       return FALSE;
  97     }
  98
  99   g_variant_builder_init (&opt_builder, G_VARIANT_TYPE_VARDICT);
 100
 101   file = g_file_new_for_uri (uri);
 102   if (g_file_is_native (file))
 103     {
 104       char *path = NULL;
 105       GUnixFDList *fd_list = NULL;
 106       int fd, fd_id, errsv;
 107
 108       path = g_file_get_path (file);
 109
 110       fd = g_open (path, O_PATH | O_CLOEXEC);
 111       errsv = errno;
 112       if (fd == -1)
 113         {
 114           g_set_error (error, G_IO_ERROR, g_io_error_from_errno (errsv),
 115                        "Failed to open '%s'", path);
 116           return FALSE;
 117         }
 118
 119 #ifndef HAVE_O_CLOEXEC
 120       fcntl (fd, F_SETFD, FD_CLOEXEC);
 121 #endif
 122       fd_list = g_unix_fd_list_new_from_array (&fd, 1);
 123       fd = -1;
 124       fd_id = 0;
 125
 126       res = gxdp_open_uri_call_open_file_sync (openuri,
 127                                                parent_window ? parent_window : "",
 128                                                g_variant_new ("h", fd_id),
 129                                                g_variant_builder_end (&opt_builder),
 130                                                fd_list,
 131                                                NULL,
 132                                                NULL,
 133                                                NULL,
 134                                                error);
 135       g_free (path);
 136       g_object_unref (fd_list);
 137     }
 138   else
 139     {
 140       res = gxdp_open_uri_call_open_uri_sync (openuri,
 141                                               parent_window ? parent_window : "",
 142                                               uri,
 143                                               g_variant_builder_end (&opt_builder),
 144                                               NULL,
 145                                               NULL,
 146                                               error);
 147     }
 148
 149   g_object_unref (file);
 150
 151   return res;
 152 }
 153
 154 enum {
 155   XDG_DESKTOP_PORTAL_SUCCESS   = 0,
 156   XDG_DESKTOP_PORTAL_CANCELLED = 1,
 157   XDG_DESKTOP_PORTAL_FAILED    = 2
 158 };
 159
 160 static void
 161 response_received (GDBusConnection *connection,
 162                    const char      *sender_name,
 163                    const char      *object_path,
 164                    const char      *interface_name,
 165                    const char      *signal_name,
 166                    GVariant        *parameters,
 167                    gpointer         user_data)
 168 {
 169   GTask *task = user_data;
 170   guint32 response;
 171   guint signal_id;
 172
 173   signal_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (task), "signal-id"));
 174   g_dbus_connection_signal_unsubscribe (connection, signal_id);
 175
 176   g_variant_get (parameters, "(u@a{sv})", &response, NULL);
 177
 178   switch (response)
 179     {
 180     case XDG_DESKTOP_PORTAL_SUCCESS:
 181       g_task_return_boolean (task, TRUE);
 182       break;
 183     case XDG_DESKTOP_PORTAL_CANCELLED:
 184       g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_CANCELLED, "Launch cancelled");
 185       break;
 186     case XDG_DESKTOP_PORTAL_FAILED:
 187     default:
 188       g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED, "Launch failed");
 189       break;
 190     }
 191
 192   g_object_unref (task);
 193 }
 194
 195 static void
 196 open_call_done (GObject      *source,
 197                 GAsyncResult *result,
 198                 gpointer      user_data)
 199 {
 200   GXdpOpenURI *openuri = GXDP_OPEN_URI (source);
 201   GDBusConnection *connection;
 202   GTask *task = user_data;
 203   GError *error = NULL;
 204   gboolean open_file;
 205   gboolean res;
 206   char *path;
 207   const char *handle;
 208   guint signal_id;
 209
 210   connection = g_dbus_proxy_get_connection (G_DBUS_PROXY (openuri));
 211   open_file = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (task), "open-file"));
 212
 213   if (open_file)
 214     res = gxdp_open_uri_call_open_file_finish (openuri, &path, NULL, result, &error);
 215   else
 216     res = gxdp_open_uri_call_open_uri_finish (openuri, &path, result, &error);
 217
 218   if (!res)
 219     {
 220       g_task_return_error (task, error);
 221       g_object_unref (task);
 222       g_free (path);
 223       return;
 224     }
 225
 226   handle = (const char *)g_object_get_data (G_OBJECT (task), "handle");
 227   if (strcmp (handle, path) != 0)
 228     {
 229       signal_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (task), "signal-id"));
 230       g_dbus_connection_signal_unsubscribe (connection, signal_id);
 231
 232       signal_id = g_dbus_connection_signal_subscribe (connection,
 233                                                       "org.freedesktop.portal.Desktop",
 234                                                       "org.freedesktop.portal.Request",
 235                                                       "Response",
 236                                                       path,
 237                                                       NULL,
 238                                                       G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE,
 239                                                       response_received,
 240                                                       task,
 241                                                       NULL);
 242       g_object_set_data (G_OBJECT (task), "signal-id", GINT_TO_POINTER (signal_id));
 243     }
 244 }
 245
 246 void
 247 g_openuri_portal_open_uri_async (const char          *uri,
 248                                  const char          *parent_window,
 249                                  GCancellable        *cancellable,
 250                                  GAsyncReadyCallback  callback,
 251                                  gpointer             user_data)
 252 {
 253   GDBusConnection *connection;
 254   GTask *task;
 255   GFile *file;
 256   GVariant *opts = NULL;
 257   int i;
 258   guint signal_id;
 259
 260   if (!init_openuri_portal ())
 261     {
 262       g_task_report_new_error (NULL, callback, user_data, NULL,
 263                                G_IO_ERROR, G_IO_ERROR_NOT_INITIALIZED,
 264                                "OpenURI portal is not available");
 265       return;
 266     }
 267
 268   connection = g_dbus_proxy_get_connection (G_DBUS_PROXY (openuri));
 269
 270   if (callback)
 271     {
 272       GVariantBuilder opt_builder;
 273       char *token;
 274       char *sender;
 275       char *handle;
 276
 277       task = g_task_new (NULL, cancellable, callback, user_data);
 278
 279       token = g_strdup_printf ("gio%d", g_random_int_range (0, G_MAXINT));
 280       sender = g_strdup (g_dbus_connection_get_unique_name (connection) + 1);
 281       for (i = 0; sender[i]; i++)
 282         if (sender[i] == '.')
 283           sender[i] = '_';
 284
 285       handle = g_strdup_printf ("/org/fredesktop/portal/desktop/request/%s/%s", sender, token);
 286       g_object_set_data_full (G_OBJECT (task), "handle", handle, g_free);
 287       g_free (sender);
 288
 289       signal_id = g_dbus_connection_signal_subscribe (connection,
 290                                                       "org.freedesktop.portal.Desktop",
 291                                                       "org.freedesktop.portal.Request",
 292                                                       "Response",
 293                                                       handle,
 294                                                       NULL,
 295                                                       G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE,
 296                                                       response_received,
 297                                                       task,
 298                                                       NULL);
 299       g_object_set_data (G_OBJECT (task), "signal-id", GINT_TO_POINTER (signal_id));
 300
 301       g_variant_builder_init (&opt_builder, G_VARIANT_TYPE_VARDICT);
 302       g_variant_builder_add (&opt_builder, "{sv}", "handle_token", g_variant_new_string (token));
 303       g_free (token);
 304
 305       opts = g_variant_builder_end (&opt_builder);
 306     }
 307   else
 308     task = NULL;
 309
 310   file = g_file_new_for_uri (uri);
 311   if (g_file_is_native (file))
 312     {
 313       char *path = NULL;
 314       GUnixFDList *fd_list = NULL;
 315       int fd, fd_id, errsv;
 316
 317       if (task)
 318         g_object_set_data (G_OBJECT (task), "open-file", GINT_TO_POINTER (TRUE));
 319
 320       path = g_file_get_path (file);
 321       fd = g_open (path, O_PATH | O_CLOEXEC);
 322       errsv = errno;
 323       if (fd == -1)
 324         {
 325           g_task_report_new_error (NULL, callback, user_data, NULL,
 326                                    G_IO_ERROR, g_io_error_from_errno (errsv),
 327                                    "OpenURI portal is not available");
 328           return;
 329         }
 330
 331 #ifndef HAVE_O_CLOEXEC
 332       fcntl (fd, F_SETFD, FD_CLOEXEC);
 333 #endif
 334       fd_list = g_unix_fd_list_new_from_array (&fd, 1);
 335       fd = -1;
 336       fd_id = 0;
 337
 338       gxdp_open_uri_call_open_file (openuri,
 339                                     parent_window ? parent_window : "",
 340                                     g_variant_new ("h", fd_id),
 341                                     opts,
 342                                     fd_list,
 343                                     cancellable,
 344                                     task ? open_call_done : NULL,
 345                                     task);
 346       g_object_unref (fd_list);
 347       g_free (path);
 348     }
 349   else
 350     {
 351       gxdp_open_uri_call_open_uri (openuri,
 352                                    parent_window ? parent_window : "",
 353                                    uri,
 354                                    opts,
 355                                    cancellable,
 356                                    task ? open_call_done : NULL,
 357                                    task);
 358     }
 359
 360   g_object_unref (file);
 361 }
 362
 363 gboolean
 364 g_openuri_portal_open_uri_finish (GAsyncResult  *result,
 365                                   GError       **error)
 366 {
 367   return g_task_propagate_boolean (G_TASK (result), error);
 368 }