Exceptions

If occur a exception, you will get it in FileDownloadListener#error(BaseDownloadTask, Throwable)

Exception	reason
FileDownloadHttpException	When the HTTP status code is not 200(HTTP_OK), and not 206(HTTP_PARTIAL) either. You can find the request-header, the response-header and response-code in this exception.
FileDownloadGiveUpRetryException	When we can't know the size of the download file, and its Transfer-Encoding is not Chunked either; And With this exception, will ignore all retry-chances(BaseDownloadTask#setAutoRetryTimes). You can ignore such exception by add http.lenient=true to the filedownloader.properties, and will download directly as a Chunked-Resource.
FileDownloadOutOfSpaceException	When the file will be downloaded is too large to store.
FileDownloadNetworkPolicyException	If you have set true to BaseDownloadTask#setWifiRequired and the network type isn't wifi when task is running
PathConflictException	When there is an another running task with the same path to the current task's, in order to avoid two tasks writing to the one file, the current task will receive this exception
Others	some program Exceptions.