Add trailing slash to applications path if one does not exist, C# app running on IIS

Question

I know this can be done with URL Rewrite but this is a customer machine where they don't want to install extensions unless they really have to. The application is running in a folder under the original domain name like this:

domain.com/app1

If a request is made to domain.com/app1 I wan't it to be permanently redirected to domain.com/app1/.

Application and IIS:

.NET Framework 4.5
IIS 7.0

Example rule that is last resort:

<rule name="Add trailing slash" stopProcessing="true">
  <match url="(.*[^/])$" />
  <conditions>
    <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
    <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
  </conditions>
  <action type="Redirect" redirectType="Permanent" url="{R:1}/" />
</rule>

Out of curiosity, why? Under RFC 1738 slashes should only be used as a path component separator, as a terminator (your proposed use) they're meaningless: http://stackoverflow.com/questions/5948659/when-should-i-use-a-trailing-slash-in-my-url - what you're proposing would only add an extra HTTP redirect that would add latency to user-operations and ultimately harm the user-experience. — Dai, Nov 17 '16 at 10:24
There is also the risk that a non-conforming UA (of which there are *many*) might truncate any trailing slashes in any request it sends-out and so get stuck in an infinite redirect loop. Please don't do this. — Dai, Nov 17 '16 at 10:25
@Dai A very valid question. It is due to the current configuration of Angular that we are using. If a trailing slash is not added when the application is run from a sub directory, the angular routing will go into an infinite loop calling for a route that does not exist. Not ideal in any way but this is the situation. — Ogglas, Nov 17 '16 at 10:30

score 2 · Accepted Answer · answered Nov 17 '16 at 10:32

Solved it in Global.asax using this method:

protected void Application_BeginRequest()
{
    if (Request.ApplicationPath != "/" && Request.ApplicationPath.Equals(Request.Path, StringComparison.CurrentCultureIgnoreCase))
    {
        var redirectUrl = VirtualPathUtility.AppendTrailingSlash(Request.ApplicationPath);
        Response.RedirectPermanent(redirectUrl);
    }
}

Add trailing slash to applications path if one does not exist, C# app running on IIS

1 Answers1