ASP.NET WebApi base Uri of the application from non-Request worker thread

Question

I have an ASP.NET WebApi application running in IIS. From a non-Request background worker thread I need to find out the base Uri of the application (e.g., https://machineName:port/applicationName/).

The usual suggestions do not work since the Request object is null in the case of a worker thread that was created in the Application_Start() method.

Update: I am adding the port to the environment-specific web.config file which gets merged at deployment time (as suggested by @Kenneth).

Answer 1

You can use the HostingEnvironment.ApplicationVirtualPath property.

It's located in the System.Web.Hosting-namespace of the System.Web assembly

This is the MSDN reference: https://msdn.microsoft.com/en-us/library/system.web.hosting.hostingenvironment(v=vs.110).aspx

• Philipp Schmid: Unfortunately, that only provides /applicationName/ but not the port number (in case the application is using a non-default port). Is there a way to get the port number separately to reconstruct the entire application Uri?
• Kenneth: afaik that's not possible. There are a few workarounds, which require you to wait until the first request has come in and then capture the info: mvolo.com/… However, you should probably rethink why you need this. I'd say you can probably keep that info inside your web.config and change it (preferably automated) when you deploy

Answer 2

I would suggest the same solution as @Kenneth.

Otherwise, I guess you could grab the value on App Start and capture it in memory for later usage.