Output a file like url via routing

Prepare a binary output action for file output

[RoutePrefix("images")]
public class ImageController : Controller
{
    // GET: ~/images/profile.png
    // GET: ~/images/1873429732.jpg
    [HttpGet]
    [Route("{name}.{ext}")]
    public ActionResult ReadImage(string name, string ext)
    {
        if (System.IO.File.Exists(Server.MapPath(string.Format("~/uploads/{0}.{1}", name, ext))))
        {
            byte[] data = System.IO.File.ReadAllBytes(Server.MapPath(string.Format("~/uploads/{0}.{1}", name, ext)));
            string contentType = MimeMapping.GetMimeMapping(System.IO.Path.GetFileName(string.Format("{0}.{1}", name, ext)));
            return File(data, contentType);
        }
        else
        {
            return new HttpStatusCodeResult(404);
        }
    }
}

Then try test it, but respone 404 not found.

Add runAllManagedModulesForAllRequests="true" on modules section.

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  ...
  <system.webServer>
    ...
    <modules runAllManagedModulesForAllRequests="true">
      <remove name="ApplicationInsightsWebTracking"/>
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web"
        preCondition="managedHandler"/>
    </modules>
  </system.webServer>
  ...
</configuration>

Then try it again, image rendered success.