CODEWITHSUNDEEP
asp.netasp.net-mvc
Water Cooler v2
Water Cooler v2

Reputation: 33880

Where must I retrieve the application's base Uri / root path?

If my ASP.NET MVC application is deployed at the url http://www.foobar.com/app, then I want to be able to get this root Url.

I want to therefore do this at some place:

var scheme = HttpContext.Current.Request.Url.Scheme;
var host = HttpContext.Current.Request.Url.Host;
var port = HttpContext.Current.Request.Url.IsDefaultPort 
           ? 
           string.Empty : string.Format(":{0}", HttpContext.Current.Request.Url.Port);

var applicationRootUrl = 
          string.Format("{0}://{1}{2}", scheme, host, port);

Option A If I do it in the Application_Start even in Global.asax, the HttpContext.Current.Request is not available at that time.

Option B I could do it in some event where a user request arrives (BeginRequest, I think or something. Don't know its name but can look it up), and check if I already have the base path then I don't reconstruct the path, otherwise I do construct the path of the application.

Option C I could write an HTTP Module or an Action Filter for this.

However, options B and C will compromise performance slightly as they will perform this check with every request, even though they will only construct the Url with the first request.

So, where do I construct the base url of my application?

PS: I am using ASP.NET MVC 5.2.3 and targeting v4.6 of the .NET framework (and hence v4.6 of ASP.NET as well).

Upvotes: 1

Views: 182

Answers (1)

Minh Nguyen
Minh Nguyen

Reputation: 2201

You can construct the RootURI once time and store it somewhere (Application variable, Memory Cache, ...) then reuse it later.

For example:

public static GetRootUri()
{
  if (Application["RootUri"] == null)
  {
     var rootUri = ConstructRootUriHere();
     Application["RootUri"] = rootUri;
  }

   return Application["RootUri"] as string;
}

Anyway I do not think you need to do this as it should not affect performance at all so it is not worth it.

Upvotes: 1

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