Incorrect redirect between action

Question

I'm having some problems when the user wants to move to action games between domains. Organized at the local version of this:

mysite.com/subdomain1/webpage/show?url=about
mysite.com/subdomain2/webpage/show?url=about

Globally:

subdomain1.mysite.com/webpage/show?url=about
subdomain2.mysite.com/webpage/show?url=about

I want to make the user does not enter the main subdomain every time. For example: Current page - subdomain1.mysite.com/webpage/show?url=about. I want to see into subdomain2 similar page. I redirected user to subdomain2.mysite.com/. But i want to redirect user - subdomain2.mysite.com/webpage/show?url=about without transition at subdomain2.mysite.com

How can do it in ASP MVC and C#?

Answer 1

public static string ReplaceSubdomain(this HttpRequest request)
        {
            var urlReferrer = request.UrlReferrer.AbsoluteUri != null ? request.UrlReferrer.AbsoluteUri : string.Empty;
            // Get URl
            var url = request.Url.AbsoluteUri;
        #if DEBUG || APPS
            // Search local subdomain
            Regex child = new Regex(@"\b[0-9]?[.]?child[0-9]?");
            // if this request consist of subdomain
            if (child.IsMatch(urlReferrer) && child.IsMatch(url))
            {
                // select subdomain
                var matchUrlRef = child.Match(urlReferrer).ToString();
                var matchUrl = child.Match(url).ToString();
                // if subdomain are not equals
                if ((matchUrlRef != matchUrl))
                {
                    // single out link after local subdomain
                    var urlRefSub = urlReferrer.Remove(0, urlReferrer.IndexOf(matchUrlRef) + matchUrlRef.Length);
                    var urlSub = urlReferrer.Remove(0, url.IndexOf(matchUrl) + matchUrl.Length);
                    // validate link query after subdomain
                    // if different url query - replace subdomain
                    if (urlReferrer.Length > urlSub.Length)
                        return urlReferrer.Replace(urlRefSub, urlSub);
                }
            }
            return url;
        #else
 

            //  Check if before page are existsand subdomain are equls
            if (!SubDomainRoute.GetSubdomain(urlReferrer).Equals(SubDomainRoute.GetSubdomain(url)))   
                // if subdomain really exist for "child"
                if (SubDomainRoute.GetSubdomain(urlReferrer).Contains("child") 
                        && SubDomainRoute.GetSubdomain(url).Contains("child"))
                    return url.Replace(SubDomainRoute.GetSubdomain(url),
                                                           SubDomainRoute.GetSubdomain(urlReferrer));
            return request.Url.AbsoluteUri;
        #endif
        }

Sorry if i distract you and spend your time - I myself found the solution.