[Spice-devel] [spice-gtk v2 2/2] file-xfer: Inform client of errors on init of xfer

[Victor Toso]

From: Victor Toso <me at victortoso.com>

With SpiceFileTransferTask we suggest that Spice clients watch
(signal) SpiceMainChannel::new-file-transfer so they can follow the
transfer's progress till the moment it is finished.

The signal SpiceFileTransferTask::finished informs if an error happens
to the application.

This patch solves the problem of SpiceFileTransferTask::finished not
being emitted when the agent is not connected nor when file-transfer
is disabled in the host.

We should first emit SpiceMainChannel::new-file-transfer followed up
by SpiceFileTransferTask::finished, which is done by the function
spice_file_transfer_task_completed().

As channel-main chains up the "finish" signal by removing the
SpiceFileTransferTask from its GHashTable, we have to change from
GHashTableIter to a simple GList of keys.

Related: https://bugzilla.redhat.com/show_bug.cgi?id=1373830
Signed-off-by: Victor Toso <victortoso at redhat.com>
---
 src/channel-main.c | 50 ++++++++++++++++++++++----------------------------
 1 file changed, 22 insertions(+), 28 deletions(-)

diff --git a/src/channel-main.c b/src/channel-main.c
index 68ec62e..17f9122 100644
--- a/src/channel-main.c
+++ b/src/channel-main.c
@@ -3103,9 +3103,9 @@ void spice_main_file_copy_async(SpiceMainChannel *channel,
                                 gpointer user_data)
 {
     SpiceMainChannelPrivate *c;
-    GHashTableIter iter;
-    gpointer key, value;
     FileTransferOperation *xfer_op;
+    GError *error = NULL;
+    GList *it, *keys;
 
     g_return_if_fail(channel != NULL);
     g_return_if_fail(SPICE_IS_MAIN_CHANNEL(channel));
@@ -3113,25 +3113,13 @@ void spice_main_file_copy_async(SpiceMainChannel *channel,
 
     c = channel->priv;
     if (!c->agent_connected) {
-        g_task_report_new_error(channel,
-                                callback,
-                                user_data,
-                                spice_main_file_copy_async,
-                                SPICE_CLIENT_ERROR,
-                                SPICE_CLIENT_ERROR_FAILED,
-                                _("The agent is not connected"));
-        return;
-    }
-
-    if (test_agent_cap(channel, VD_AGENT_CAP_FILE_XFER_DISABLED)) {
-        g_task_report_new_error(channel,
-                                callback,
-                                user_data,
-                                spice_main_file_copy_async,
-                                SPICE_CLIENT_ERROR,
-                                SPICE_CLIENT_ERROR_FAILED,
-                                _("The file transfer is disabled"));
-        return;
+        error = g_error_new(SPICE_CLIENT_ERROR,
+                            SPICE_CLIENT_ERROR_FAILED,
+                            _("The agent is not connected"));
+    } else if (test_agent_cap(channel, VD_AGENT_CAP_FILE_XFER_DISABLED)) {
+        error = g_error_new(SPICE_CLIENT_ERROR,
+                            SPICE_CLIENT_ERROR_FAILED,
+                            _("The file transfer is disabled"));
     }
 
     xfer_op = g_new0(FileTransferOperation, 1);
@@ -3144,23 +3132,29 @@ void spice_main_file_copy_async(SpiceMainChannel *channel,
                                                                flags,
                                                                cancellable);
     xfer_op->stats.num_files = g_hash_table_size(xfer_op->xfer_task);
-    g_hash_table_iter_init(&iter, xfer_op->xfer_task);
-    while (g_hash_table_iter_next(&iter, &key, &value)) {
+    keys = g_hash_table_get_keys(xfer_op->xfer_task);
+    for (it = keys; it != NULL; it = it->next) {
         guint32 task_id;
-        SpiceFileTransferTask *xfer_task = value;
+        SpiceFileTransferTask *xfer_task = g_hash_table_lookup(xfer_op->xfer_task, it->data);
 
         task_id = spice_file_transfer_task_get_id(xfer_task);
 
         SPICE_DEBUG("Insert a xfer task:%u to task list", task_id);
 
-        g_hash_table_insert(c->file_xfer_tasks, key, xfer_op);
+        g_hash_table_insert(c->file_xfer_tasks, it->data, xfer_op);
         g_signal_connect(xfer_task, "finished", G_CALLBACK(file_transfer_operation_task_finished), NULL);
         g_signal_emit(channel, signals[SPICE_MAIN_NEW_FILE_TRANSFER], 0, xfer_task);
 
-        spice_file_transfer_task_init_task_async(xfer_task,
-                                                 file_xfer_init_task_async_cb,
-                                                 xfer_op);
+        if (error == NULL) {
+            spice_file_transfer_task_init_task_async(xfer_task,
+                                                     file_xfer_init_task_async_cb,
+                                                     xfer_op);
+        } else {
+            spice_file_transfer_task_completed(xfer_task, g_error_copy(error));
+        }
     }
+    g_list_free(keys);
+    g_clear_error(&error);
 }
 
 /**
-- 
2.13.0