I was able to remove the two second delay by changing my curl command to the following: curl -H 'Expect: 100-continue' -F 'file1=@/tmp/hworld' 'localhost:81/upload/this' (For reference it was curl -F 'file1=@/tmp/hworld' 'localhost:81/upload/this') Posted at Nginx Forum: http://forum.nginx.org/read.php?2,3264,3268#msg-3268