diff -r 002d8b981128 Lib/httplib.py
--- a/Lib/httplib.py	Wed Dec 09 19:44:30 2015 +0200
+++ b/Lib/httplib.py	Fri Dec 11 13:40:09 2015 +0600
@@ -865,6 +865,7 @@
         blocksize = 8192
         if hasattr(data,'read') and not isinstance(data, array):
             if self.debuglevel > 0: print "sendIng a read()able"
+            if data.tell() > 0: data.seek(0) # rewind for retry send file
             datablock = data.read(blocksize)
             while datablock:
                 self.sock.sendall(datablock)