I am trying to create a windows service. The purpose of service is to pick up urls from a database and check their page rank from google. The purpose is to catch any one faking their page ranks. I found some code at
http://www.codeproject.com/KB/aspnet/Google_Pagerank.aspx and used it.
Now here is the code
public static int GetPageRank()
{
string file = "
http://toolbarqueries.google.com/search?q=info:codeproject.com";
try
{
//Request PR from Google
WebRequest request = WebRequest.Create(file);
WebResponse response = request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
string data = reader.ReadToEnd();
reader.Close();
response.Close();
//Parse PR from string
int pageRank = -1;
if (data.IndexOf(':') != -1)
{
data = data.Substring(data.LastIndexOf(':') + 1);
}
int.TryParse(data, out pageRank);
return pageRank;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return -1;
}
}
Now what is happening is this when this method is called after some tries like 100 tries i start getting following exception. "The remote server returned an error: (503) Server Unavailable". I have done some research and i have seen a related question on stack overflow as well. Apparently google stops serving requests if to many of them originate from a same ip. Are there any work arounds to it that will enable me to check several thousand pageranks in say two hours or three hours.
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