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   源码介绍

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用Asp.Net MVC实现泛域名解析

实现了如下功能:
www.{language}-{culture}.example.com
www.{controller}.example.com/{action}
www.{clientname}.example.com

 

          routes.Add("DomainRoute", new DomainRoute(
                "home.example.com",                                     // Domain with parameters
                "{action}/{id}",                                        // URL with parameters
                new { controller = "Home", action = "Index", id = "" }  // Parameter defaults
            ));

            //routes.Add("DomainRoute", new DomainRoute(
            //    "{controller}.example.com",                             // Domain with parameters
            //    "{action}/{id}",                                        // URL with parameters
            //    new { controller = "Home", action = "Index", id = "" }  // Parameter defaults
            //));

            //routes.Add("DomainRoute", new DomainRoute(
            //    "{controller}-{action}.example.com",                             // Domain with parameters
            //    "{id}",                                        // URL with parameters
            //    new { controller = "Home", action = "Index", id = "" }  // Parameter defaults
            //));
            
            routes.MapRoute(
                "Default",                                              // Route name
                "{controller}/{action}/{id}",                           // URL with parameters
                new { controller = "Home", action = "Index", id = "" }  // Parameter defaults
            );

 

 

   public class DomainRoute : Route
    {
        private Regex domainRegex;
        private Regex pathRegex;

        public string Domain { get; set; }

        public DomainRoute(string domain, string url, RouteValueDictionary defaults)
            : base(url, defaults, new MvcRouteHandler())
        {
            Domain = domain;
        }

        public DomainRoute(string domain, string url, RouteValueDictionary defaults, IRouteHandler routeHandler)
            : base(url, defaults, routeHandler)
        {
            Domain = domain;
        }

        public DomainRoute(string domain, string url, object defaults)
            : base(url, new RouteValueDictionary(defaults), new MvcRouteHandler())
        {
            Domain = domain;
        }

        public DomainRoute(string domain, string url, object defaults, IRouteHandler routeHandler)
            : base(url, new RouteValueDictionary(defaults), routeHandler)
        {
            Domain = domain;
        }

        public override RouteData GetRouteData(HttpContextBase httpContext)
        {
            // Build regex
            domainRegex = CreateRegex(Domain);
            pathRegex = CreateRegex(Url);

            // Request information
            string requestDomain = httpContext.Request.Headers["host"];
            if (!string.IsNullOrEmpty(requestDomain))
            {
                if (requestDomain.IndexOf(":") > 0)
                {
                    requestDomain = requestDomain.Substring(0, requestDomain.IndexOf(":"));
                }
            }
            else
            {
                requestDomain = httpContext.Request.Url.Host;
            }
            string requestPath = httpContext.Request.AppRelativeCurrentExecutionFilePath.Substring(2)   httpContext.Request.PathInfo;

            // Match domain and route
            Match domainMatch = domainRegex.Match(requestDomain);
            Match pathMatch = pathRegex.Match(requestPath);

            // Route data
            RouteData data = null;
            if (domainMatch.Success && pathMatch.Success)
            {
                data = new RouteData(this, RouteHandler);

                // Add defaults first
                if (Defaults != null)
                {
                    foreach (KeyValuePair<string, object> item in Defaults)
                    {
                        data.Values[item.Key] = item.Value;
                    }
                }

                // Iterate matching domain groups
                for (int i = 1; i < domainMatch.Groups.Count; i  )
                {
                    Group group = domainMatch.Groups[i];
                    if (group.Success)
                    {
                        string key = domainRegex.GroupNameFromNumber(i);

                        if (!string.IsNullOrEmpty(key) && !char.IsNumber(key, 0))
                        {
                            if (!string.IsNullOrEmpty(group.Value))
                            {
                                data.Values[key] = group.Value;
                            }
                        }
                    }
                }

                // Iterate matching path groups
                for (int i = 1; i < pathMatch.Groups.Count; i  )
                {
                    Group group = pathMatch.Groups[i];
                    if (group.Success)
                    {
                        string key = pathRegex.GroupNameFromNumber(i);

                        if (!string.IsNullOrEmpty(key) && !char.IsNumber(key, 0))
                        {
                            if (!string.IsNullOrEmpty(group.Value))
                            {
                                data.Values[key] = group.Value;
                            }
                        }
                    }
                }
            }

            return data;
        }

        public override VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary values)
        {
            return base.GetVirtualPath(requestContext, RemoveDomainTokens(values));
        }

        public DomainData GetDomainData(RequestContext requestContext, RouteValueDictionary values)
        {
            // Build hostname
            string hostname = Domain;
            foreach (KeyValuePair<string, object> pair in values)
            {
                hostname = hostname.Replace("{"   pair.Key   "}", pair.Value.ToString());
            }

            // Return domain data
            return new DomainData
            {
                Protocol = "http",
                HostName = hostname,
                Fragment = ""
            };
        }

        private Regex CreateRegex(string source)
        {
            // Perform replacements
            source = source.Replace("/", @"\/?");
            source = source.Replace(".", @"\.?");
            source = source.Replace("-", @"\-?");
            source = source.Replace("{", @"(?<");
            source = source.Replace("}", @">([a-zA-Z0-9_]*))");

            return new Regex("^"   source   "$");
        }

        private RouteValueDictionary RemoveDomainTokens(RouteValueDictionary values)
        {
            Regex tokenRegex = new Regex(@"({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?");
            Match tokenMatch = tokenRegex.Match(Domain);
            for (int i = 0; i < tokenMatch.Groups.Count; i  )
            {
                Group group = tokenMatch.Groups[i];
                if (group.Success)
                {
                    string key = group.Value.Replace("{", "").Replace("}", "");
                    if (values.ContainsKey(key))
                        values.Remove(key);
                }
            }

            return values;
        }
    }