以编程方式检查IIS7启动画面

Question

I have a ASP.Net 3.5 Web app (C#) where I need to programmatically check to see if another one of our sites (that isn't ASP.Net) is up and running. Currently, I have a method with the following code which checks for a StatusCode of 200. The issue I'm running into is that the IIS7 splash page that comes up returns a status code of 200, and I don't see anything else within the response object that would allow me to verify the page we are expecting actually displays. I would like to avoid getting the response back and using a StreamReader just to look for a div on the page to verify it's valid (if possible) as they do (similarly) in this link.

        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(urlToCheck);
        request.AllowAutoRedirect = true;

        HttpWebResponse response;
        try
        {
            response = (HttpWebResponse)request.GetResponse();

            if (response.StatusCode == HttpStatusCode.OK)
            {
                return true;
            }
            return false;
        }
        catch (Exception)
        {
            return false;
        }

Any help is greatly appreciated.

Answer 1

Just read the Response it's already there and waiting!

Stream s = response.GetResponseStream();
StreamReader r = new StreamReader(s);
string html = r.ReadToEnd();

// IIS7
if(html.Contains(@"<div id=""container"">
<a href=""http://go.microsoft.com/fwlink/?linkid=66138&amp;clcid=0x409""><img src=""welcome.png"" alt=""IIS7"" width=""571"" height=""411""></a>
</div>") {


}

Answer 2

Investigate the headers that are returned by the other application. Most probably it will have some additional headers present compared to the IIS splash screen. For example, it might specify Cache-Control . If your response does not have that header, you can expect it to be the splash screen.