Asynchronously queries the stream for a #GFileInfo. When completed, callback will be called with a #GAsyncResult which can be used to finish the operation with gio.file_iostream.FileIOStream.queryInfoFinish.
For the synchronous version of this function, see gio.file_iostream.FileIOStream.queryInfo.
a file attribute query string.
the I/O priority of the request
optional #GCancellable object, null to ignore.
a #GAsyncReadyCallback to call when the request is satisfied
Asynchronously queries the stream for a #GFileInfo. When completed, callback will be called with a #GAsyncResult which can be used to finish the operation with gio.file_iostream.FileIOStream.queryInfoFinish.
For the synchronous version of this function, see gio.file_iostream.FileIOStream.queryInfo.