I'm trying to download first bytes of a webpage.
I add Range to the HTTP request header. it's my code in C#:
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://example.com");
request.AddRange(0,1000);
//request.Proxy = null;
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
Stream st = response.GetResponseStream();
StreamReader sr = new StreamReader(st);
string str = sr.ReadToEnd();
sr.Close();
st.Close();
}
for some webpages it works fine, but some servers will ignore the HTTP range header, so the server send all the page in the response.
I changed my code to this:
string str = sr.Read(buffer,0,999);
but it doesn't work! because the problem is not in this line. actually the response will send to my program when I call request.GetResponse()! in this line all the bytes received by the program and write the all bytes to the RAM. I want to stop receiving data from the server when I received first 1000 bytes.
but there is no control on HttpWebRequest class and .GetResponse() method to stop receiving data after 1000 bytes received.
How can I do that?
I think there would be another HTTP Request custom class that allow us to stop receiving data when we want.
please tell me any Idea about this problem. I'm thinking to override the HttpWebRequest or write a MFC Library (C++ language) and import it into my project, but I don't know how to do this.
EDIT: I know it's optional for server to allow or ignore the Range header! but my question is how can I stop receiving data from the server! for example the server is sending 10,000 bytes to my computer, I want to stop receiving bytes after I see the 1000th byte! (I don't want the server to send just first 1000 bytes, I want to close connection and stop receiving the bytes after first 1000 bytes! even if the server send all 10,000 bytes)
