libcurl - django error with use curl download CURLOPT_RESUME_FROM_LARGE -

i use django ,just download file server. , use curl download file in client. when add curlopt_resume_from_large resume broken transfer,error come. don't know server error or client error.
client download code:

    file* ptmpfile = fopen((m_download_filepath_pre+tmpfilename).c_str(), "ab+");     fseek(ptmpfile, 0l, seek_end);     int currentsize = ftell(ptmpfile);      curl_easy_setopt(curl, curlopt_file, ptmpfile);     curl_easy_setopt(curl, curlopt_header ,0);     curl_easy_setopt(curl, curlopt_nobody, 0);     curl_easy_setopt(curl, curlopt_connecttimeout,60);     curl_easy_setopt(curl, curlopt_noprogress ,0);     curl_easy_setopt(curl, curlopt_progressfunction ,my_progress_func);     curl_easy_setopt(curl, curlopt_progressdata ,sdownload);     curl_easy_setopt(curl, curlopt_resume_from_large, currentsize); 

myserver error:

exception happened during processing of request ('127.0.0.1', 50232) traceback (most recent call last):   file "/library/frameworks/python.framework/versions/7.3/lib/python2.7/socketserver.py", line 582, in process_request_thread     self.finish_request(request, client_address)   file "/library/frameworks/python.framework/versions/7.3/lib/python2.7/socketserver.py", line 323, in finish_request     self.requesthandlerclass(request, client_address, self)   file "/library/frameworks/python.framework/versions/7.3/lib/python2.7/site-packages/django-1.4-py2.7.egg/django/core/servers/basehttp.py", line 139, in __init__     super(wsgirequesthandler, self).__init__(*args, **kwargs)   file "/library/frameworks/python.framework/versions/7.3/lib/python2.7/socketserver.py", line 640, in __init__     self.finish()   file "/library/frameworks/python.framework/versions/7.3/lib/python2.7/socketserver.py", line 693, in finish     self.wfile.flush()   file "/library/frameworks/python.framework/versions/7.3/lib/python2.7/socket.py", line 303, in flush     self._sock.sendall(view[write_offset:write_offset+buffer_size]) error: [errno 32] broken pipe 

thanks～～

fixed :) client error ,curlopt_resume_from_large must curl_off_t parameter.

curl_easy_setopt(curl, curlopt_resume_from_large, (curl_off_t)currentsize); 

or use

curl_easy_setopt(curl, curlopt_resume_from, currentsize); 

but knows different between curlopt_resume_from_large , curlopt_resume_from?