Download accelarators

Download accelarators

• Bollwerk

  I can take contetnt length by contentlength property
  

   HttpWebResponse response = (HttpWebResponse)request.GetResponse ();
  
   Console.WriteLine ("Content length is {0}", response.ContentLength);
   but how can i take different parts simultaneously from server 
  I can not find solution from your link.
  

  
  

• Andy White

  
  Thanks for all answers.I think ergin and JonCole(AddRange) answers are what i am looking for.Also
  @Mike Flasko now i don't know what ServicePointManager class is.But i will search it.
  Also more advices for  download accelarator progrraming  will  help  me more(If anyone want to share some ideas or advices).
  Thanks.
  

• aburstein

  http://www.apacheweek.com/features/http11
  
  Add an extra header into your request; Range: bytes=startFromByte-ByteLength
  
  Range: bytes=500-999
  Get 500 bytes, start from 500th byte and receive 500 bytes (999 -500+1) = 500
  
  check the link above for more information.
  
  

• kamilce

  Using System.Net.HttpWebRequest you can request multiple objects from an HTTP server at once; however, the number you can simultaneously request is limited by the number of connections you can open to a given server.  The RFC recommends no more than 2 connections per host to a given server.  Therefore, you can request 2 objects at once from a server.  You can adjust the number of connections to a given server that System.Net will create using the ServicePointManager class or an application configuration file.  
  
  Also, to increase performance, you can enable pipelining (via a property on the HttpWebRequest class).  This allows you to send multiple requests over a connection before hearing the response of the first request.
  
  I hope this helps..

  
  
  

• Fil

  There is support for this in the http protocol. RFC 2616
  
  I think section 14.35 describes how to do it. Section 14.13 mentions how to get the length without getting the data.
  
  
  
  
  

• TomP

  In HttpWebRequest, you would use the AddRange method instead of directly adding the Range header to your request.
  
  
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