[spice-gtk v5 06/23] main: to let SpiceFileTransferTask handle errors

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* on VD_AGENT_FILE_XFER_STATUS_CAN_SEND_DATA, if the file-transfer is
  on pending state, spice_file_transfer_task_read_async() will call the
  callback with error set.

* on VD_AGENT_FILE_XFER_STATUS_SUCCESS, if the file-transfer is on
  pending state, spice_file_transfer_task_completed() will set the
  error for this task.
---
 src/channel-main.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/src/channel-main.c b/src/channel-main.c
index 244b19e..943182e 100644
--- a/src/channel-main.c
+++ b/src/channel-main.c
@@ -1993,11 +1993,6 @@ static void spice_file_transfer_task_handle_status(SpiceFileTransferTask *task,
 
     switch (msg->result) {
     case VD_AGENT_FILE_XFER_STATUS_CAN_SEND_DATA:
-        if (task->pending) {
-            error = g_error_new(SPICE_CLIENT_ERROR, SPICE_CLIENT_ERROR_FAILED,
-                           "transfer received CAN_SEND_DATA in pending state");
-            break;
-        }
         spice_file_transfer_task_read_async(task, file_xfer_read_async_cb, NULL);
         return;
     case VD_AGENT_FILE_XFER_STATUS_CANCELLED:
@@ -2009,9 +2004,6 @@ static void spice_file_transfer_task_handle_status(SpiceFileTransferTask *task,
                             "some errors occurred in the spice agent");
         break;
     case VD_AGENT_FILE_XFER_STATUS_SUCCESS:
-        if (task->pending)
-            error = g_error_new(SPICE_CLIENT_ERROR, SPICE_CLIENT_ERROR_FAILED,
-                                "transfer received success in pending state");
         break;
     default:
         g_warn_if_reached();
@@ -3000,8 +2992,15 @@ static void spice_file_transfer_task_completed(SpiceFileTransferTask *self,
                              &msg, sizeof(msg), NULL);
     }
 
-    if (self->pending)
+    if (self->pending) {
+        /* Complete but pending is okay only if error is set */
+        if (self->error == NULL) {
+            self->error = g_error_new(SPICE_CLIENT_ERROR,
+                                      SPICE_CLIENT_ERROR_FAILED,
+                                      "Cannot complete task in pending state");
+        }
         return;
+    }
 
     if (!self->file_stream) {
         file_xfer_close_cb(NULL, NULL, self);
-- 
2.7.4

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