title: How to write my own download manager using Objective C for iOS devices
body: <p>I am writing a download manager for iPhone using objective C. I am using <a href="http://allseeing-i.com/ASIHTTPRequest/" rel="nofollow">ASIHTTP framework</a> and its working great. But my problem is I am not able to download from file sharing sites like filesonic, rapidshare, hotfile etc. </p>
  
  <p>I want to know how can I get download (actual download) url from these sites, or at least how these sites are hiding this info (and where), so I can get that somehow... </p>
  
  <p>Is there any open source library or framework to help me with this? How firefox or other desktop browser get this link? </p>
  
  <p>Any help will be much appreciated!</p>
  
  <p>Update 1 : I don't want to bypass their advertising and revenue streams. Almost all file sharing companies also provide free downloads with low bandwidth, I only want to use that service. there are many download managers available now for iPhone like - "Downloads Lite". I just want to build a similar functionality.</p>