Copied to clipboard

Flag this post as spam?

This post will be reported to the moderators as potential spam to be looked at

  • Remko 109 posts 274 karma points
    15 days ago

    How to rewrite urls and add trailing slash in dotnet core, Umbraco9+

    Just want to achieve if I visit /agenda it rewrites to /agenda/ for example.

    We used to to this by adding a rewrite rule in web.config. Nowadays we add rewrite rules by adding piece of middleware and read rewrite.config file to pass to AddIISUrlRewrite()

    This seems to work for most of our rules, but in .net core matchType="IsFile" and "IsDirectory" don't seem to be supported anymore. (See: : "Some of the features of the server modules don't work with ASP.NET Core projects, such as the IsFile and IsDirectory constraints of the IIS Rewrite module. In these scenarios, use the middleware instead.")

    Normally we would use this:

    <rule name="Add trailing slash in Umbraco URL" stopProcessing="true">
            <match url="(.*[^/])$" />
                <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
                <add input="{REQUEST_URI}" negate="true" pattern="^/(umbraco|DependencyHandler\.axd)" />
            <action type="Redirect" redirectType="Permanent" url="{R:1}/" />

    But because these matchTypes aren't supported anymore, it now adds a trailing slash to all file/directory paths as well, wich of course messes up the whole site.

    Unfortunately Umbraco documentation itself doesn't mention this and still says to use this matchType in Umbraco 9+ but again: this doesnt work.

    Does anyone have another solution for this?

    Thanks in advance!

  • Marc Goodson 1813 posts 12036 karma points MVP 7x c-trib
    15 days ago
    Marc Goodson

    Hi Remko

    You can list and negate the individual file extensions, and known non front end folders and preview urls...

            <rule name="Add trailing slash" stopProcessing="true">
                  <match url="(.*[^/{2,}])$" ignoreCase="true" />
                    <add input="{REQUEST_URI}" pattern="^/umbraco/" negate="true" />
                    <add input="{REQUEST_URI}" pattern="^/api/" negate="true" />
                    <add input="{REQUEST_URI}" pattern="^/install/" negate="true" />
                    <add input="{REQUEST_URI}" pattern="^/App_Plugins/" negate="true" />
                    <add input="{REQUEST_URI}" pattern="^/media/" negate="true" />
                    <add input="{REQUEST_URI}" pattern="^/swagger/" negate="true" />
                    <add input="{REQUEST_URI}" pattern="^/([0-9]+).aspx" negate="true" />
                    <add input="{URL}" pattern="^.*\.(css|js|jpg|jpeg|png|gif|mp3|html|htm|xml|txt|pdf|svg|ico|json|webmanifest)$" negate="true" ignoreCase="true" />
                  <action type="Redirect" redirectType="Permanent" url="{R:1}/" />



  • Remko 109 posts 274 karma points
    1 week ago

    Thanks Marc,

    This helped me a lot :-)

    {URL} didn't seem to work on the server, so I replaced that with {REQUEST_URI} as well.

    Greetings, Remko

Please Sign in or register to post replies

Write your reply to: