Can I close stream immediate?

[游泳池的鱼]

Hi all:
       I use HttpClient 3.1 rc1 to download HTML page. Some times I  get
.avi or mp3 file but it not my want.
So I check "content-type" , if not equals "text/html", I release connection.
The problem happened , HttpClient
block in  here and download all data , however, I just want to close
stream.  any suggest?

       best regard