I want to get the absolute root Url of an ASP.NET application dynamically. This needs to be the full root url to the application in the form: http(s)://hostname(:port)/
I have been using this static method:
public static string GetSiteRootUrl()
{
string protocol;
if (HttpContext.Current.Request.IsSecureConnection)
protocol = "https";
else
protocol = "http";
StringBuilder uri = new StringBuilder(protocol + "://");
string hostname = HttpContext.Current.Request.Url.Host;
uri.Append(hostname);
int port = HttpContext.Current.Request.Url.Port;
if (port != 80 && port != 443)
{
uri.Append(":");
uri.Append(port.ToString());
}
return uri.ToString();
}
BUT, what if I don't have HttpContext.Current
in scope?
I have encountered this situation in a CacheItemRemovedCallback
.
A root URL is the start or index page of a domain on a web server. Colloquially, many users call the homepage the “root URL” as well.
A URL consists of five parts: the scheme, subdomain, top-level domain, second-level domain, and subdirectory. Below is an illustration of the different parts of a URL. Let's break down this URL structure below.
For WebForms, this code will return the absolute path of the application root, regardless of how nested the application may be:
HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Authority) + ResolveUrl("~/")
The first part of the above returns the scheme and domain name of the application (http://localhost
) without a trailing slash. The ResolveUrl
code returns a relative path to the application root (/MyApplicationRoot/
). By combining them together, you get the absolute path of the web forms application.
Using MVC:
HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Authority) + Url.Content("~/")
or, if you are trying to use it directly in a Razor view:
@HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Authority)@Url.Content("~/")
You might try getting the raw URL and trimming off everything after the path forward slash. You could also incorporate ResolveUrl("~/")
.
public static string GetAppUrl()
{
// This code is tested to work on all environments
var oRequest = System.Web.HttpContext.Current.Request;
return oRequest.Url.GetLeftPart(System.UriPartial.Authority)
+ System.Web.VirtualPathUtility.ToAbsolute("~/");
}
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