Preview not working with remove trailing slash

Preview not working when removing trailing slashes via web.config:

<rule name="Remove 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>

PR incoming

[kjac]

@jveer Disclaimer: I haven’t tested the PR, I just wanted to add some context to it.

If it works it’s all good 👍 but it’s not up to me to decide if it should be merged or not, that’s up to @nul800sebastiaan and the PR team.

For future reference, here’s how one could do a rewrite rule that doesn’t affect the backoffice:

<rule name="RemoveTrailingSlashRule" stopProcessing="true">
  <match url="(.*)/$" />
  <conditions logicalGrouping="MatchAll" trackAllCaptures="false">
    <add input="{URL}" pattern="^/(?:layout|umbraco|install|template)(?:/.*)?$" negate="true" />
    <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
    <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
  </conditions>
  <action type="Redirect" url="{ToLower:{R:1}}" redirectType="Permanent" />
</rule>

[nul800sebastiaan]

Additional note, if this is going to get traction in the future: this also needs testing with Umbraco being installed in a virtual directory, not sure if that affects anything in the related PR, but it is something that would need to be added to the test matrix.