WebResponse.GetResponseStream returns incomplete stream

[vito16]

Hi,

I have some C# code for a console application that was correctly grabbing pages until recently were the data is now incomplete. I am needing to grab all information including sponsored links for a url similar to: "http://search.live.com/results.aspx?q= sony+bmg" All sponsored ads on the site are contained in one of two <div> tags: <div id="at"> or <div id="ar"> when I save the output to a file and search for these tags they are not found. If I use a browser and go to the above link and view the source then I easily find the <div> tags containing the sponsored links. This was working for the past couple of months and only recently it stopped working and so I don't believe that the problem is related to my code. Below is a simplified version of my program and illustrates the same problem.

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;

namespace WebReader
{
    class Program
    {
        static void Main(string[] args)
        {
            string url = "http://search.live.com/results.aspx?q=sony+bmg";
            Uri uri = new Uri(url);

            WebRequest req = WebRequest.Create(uri);
            WebResponse resp = req.GetResponse();
            Stream stream = resp.GetResponseStream();
            StreamReader sr = new StreamReader(stream);
            string s = sr.ReadToEnd();

            System.IO.StreamWriter myFile = new System.IO.StreamWriter("c:\\WebRead.txt");
            myFile.Write(s);
            myFile.Close();
        }
    }
}

Things I have Tried:

• I have tried buffering the response in MemorySteam with the same results

Any suggestions that you may have on how to get the entire page returned so I can parse it would be appreciated.

[vito16]

I have solved the problem, it looks like live.com is now requiring the useragent information before returning the sponsored ads. I simply had to add one line which casted my WebRequest object to an HttpWebRequest and assigned the user agent. Below is the updated code which resolved my problem.

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;

namespace WebReader
{
    class Program
    {
        static void Main(string[] args)
        {
            string url = "http://search.live.com/results.aspx?q=sony+bmg";
            Uri uri = new Uri(url);

            WebRequest req = WebRequest.Create(uri);
            ((HttpWebRequest)req).UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows 5.1;";
            WebResponse resp = req.GetResponse();
            Stream stream = resp.GetResponseStream();
            StreamReader sr = new StreamReader(stream);
            string s = sr.ReadToEnd();

            System.IO.StreamWriter myFile = new System.IO.StreamWriter("c:\\WebRead.txt");
            myFile.Write(s);
            myFile.Close();
        }
    }
}