CODEWITHSUNDEEP
asp.netc#-4.0subdomain
user1928223
user1928223

Reputation: 31

subdomain url redirects to the main url

I developed a website in asp.net and hosted on windows server which does not provide me the wild card entry for the subdomain name. How can I write my url as e.g http://subdomainName.DomainName.org?

I want to redirect the url with a subdomain to the main domain; so url "subdomainName.DomainName.org" should redirect to "DomainName.org", where my subdomain name is not fixed. The subdomain will be assigned to each user.

How can I achieve this?

Upvotes: 3

Views: 3041

Answers (1)

Aristos
Aristos

Reputation: 66641

The subdomain is part of the DNS server, and work together with the IIS setup.

So, you can NOT change the DNS setup from asp.net, neither the IIS setup. When a provider gives your the access to add extra sub-domains, what is actually do is that create new entries on the DNS entry, and then add map that to the IIS, so that sub-domains to look at your site. If your provider did not have give you a tool to add sub-domains, nether you can edit the DNS entries, then you can NOT add them from asp.net.

If you can add sub-domains then you can manipulate what you going to server and show on global.asax at Application_BeginRequest using the redirect or the Rewrite the path. For example:

protected void Application_BeginRequest(Object sender, EventArgs e)
{   
    var SubDomain = GetSubDomain(HttpContext.Current.Request.Url.Host);

    if(!String.IsNullOrEmpty(SubDomain) && SubDomain != "www")
    {
       Response.Redirect("www.yourdomain.com", true);
       return;
    }
}

// from : http://madskristensen.net/post/Retrieve-the-subdomain-from-a-URL-in-C.aspx
private static string GetSubDomain(Uri url)
{
  string host = url.Host;
  if (host.Split('.').Length > 1)
  {
    int index = host.IndexOf(".");
    return host.Substring(0, index);
  }

  return null;
}

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Upvotes: 2

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