Thanks - that looks right.

But I get an error on PROD when deploying this XML:

<?xml version="1.0" encoding="utf-8" ?>
<rewrite>
  <rules>
    <rule name="Redirect to www prefix" stopProcessing="true">
        <match url=".*" />
        <conditions>
            <add input="{HTTP_HOST}" pattern="^www\." negate="true" />
            <add input="{HTTP_HOST}" pattern="^localhost(:[0-9]+)?$" negate="true" />
            <add input="{HTTP_HOST}" pattern="\.umbraco\.io$" negate="true" />
        </conditions>
        <action type="Redirect" url="https://www.{HTTP_HOST}/{R:0}" />
    </rule>
  </rules>
</rewrite>

I haven't got access to log files so I can only see this from the "frontend":

HTTP Error 500.30 - ASP.NET Core app failed to start
Common solutions to this issue:
The app failed to start
The app started but then stopped
The app started but threw an exception during startup
Troubleshooting steps:
Check the system event log for error messages
Enable logging the application process' stdout messages
Attach a debugger to the application process and inspect
For more information visit: https://go.microsoft.com/fwlink/?LinkID=2028265

In startup I have added:

app.UseRewriter(new RewriteOptions().AddIISUrlRewrite(env.ContentRootFileProvider, "IISUrlRewrite.xml"));

just before

app.UseUmbraco()

And this in the top

using Microsoft.AspNetCore.Rewrite;

Thanks - I am on the track now, I think:

I checked if the "IISUrlRewrite.xml" was in the root on the server (outside wwwroot folder) and it was not. So webdeploy haven't deployed it.

So I tried to remove your File.Exists check: Then the same error occured. But then putting back the File.Exists check site came up again.

Then I uploaded the file manually. AND tried to remove the File.Exists check. And the site still worked.

Then I tried to remove the IISUrlRewrite.xml and the site went down again.

So I think that the conclusion can be: Now the XML file can be reached by startup.cs, but Umbraco/the site ignores the rules inside the XML file (since http isn't redirected to https, and the same goes for www/non-www)

It doesn't work, and I have just updated the XML-file:

  <?xml version="1.0" encoding="utf-8" ?>
  <rewrite>
    <rules>
      <rule name="HTTP to HTTPS redirect" stopProcessing="true">
        <match url="^(.*)$" />
        <conditions>
          <add input="{HTTPS}" pattern="off" ignoreCase="true" />
          <add input="{REQUEST_URI}" pattern="^/.well-known/" negate="true" />
        </conditions>
        <action type="Redirect" url="https://{HTTP_HOST}/{R:1}" redirectType="Permanent" appendQueryString="true" />
      </rule>
      <rule name="Redirect to www prefix" stopProcessing="true">
          <match url=".*" />
          <conditions>
              <add input="{HTTP_HOST}" pattern="^www\." />
              <add input="{HTTP_HOST}" pattern="^localhost(:[0-9]+)?$" negate="true" />
          </conditions>
          <action type="Redirect" url="https://www.{HTTP_HOST}/{R:0}" />
      </rule>
    </rules>
  </rewrite>

My Startup.cs is:

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseMiddleware<MrCustomHeaders>();

        var options = new RewriteOptions();
        if (File.Exists("IISUrlRewrite.xml")) 
        {
            using (StreamReader iisUrlRewriteStreamReader = File.OpenText("IISUrlRewrite.xml"))
            {
                options.AddIISUrlRewrite(iisUrlRewriteStreamReader);
            }
        }

        app.UseUmbraco()
            .WithMiddleware(u =>
            {
                u.UseBackOffice();
                u.UseWebsite();
            })
            .WithEndpoints(u =>
            {
                u.UseInstallerEndpoints();
                u.UseBackOfficeEndpoints();
                u.UseWebsiteEndpoints();
            });
    }

I tried that now (adding some text outside tags):

...
</rule>
Some illegal text
<rule name="Redirect to www prefix" stopProcessing="true">
...

It changed nothing (the site still runs fine). Then I tried once again to remove the File.Exists check and then:

• If file was present: Site ran fine
• If file was deleted or renamed: Site went down

So it seems that the file is fetched by StreamReader, but it isn't read (or isn't read as an XML file).

Have anyone tried that or have suggestions?

Cool! Thanks, that made the rewrites being processed.

The www redirect sort of works, but it adds www to already www urls. I.e.

www.mysite.com becomes www.www.mysite.com

<rule name="Redirect to www prefix" stopProcessing="true">
          <match url=".*" />
          <conditions>
              <add input="{HTTP_HOST}" pattern="^www\." />
              <add input="{HTTP_HOST}" pattern="^localhost(:[0-9]+)?$" negate="true" />
          </conditions>
          <action type="Redirect" url="https://www.{HTTP_HOST}/{R:0}" />
      </rule>

And if I chance it to the content from https://our.umbraco.com/documentation/Reference/Routing/IISRewriteRules/:

<rule name="Redirect to www prefix" stopProcessing="true">
  <match url=".*" />
  <conditions>
    <add input="{HTTP_HOST}" pattern="^www\." negate="true" />
    <add input="{HTTP_HOST}" pattern="^localhost(:[0-9]+)?$" negate="true" />
    <add input="{HTTP_HOST}" pattern="\.umbraco\.io$" negate="true" />
  </conditions>
  <action type="Redirect" url="https://www.{HTTP_HOST}/{R:0}" />
</rule>

I get the same error as in the beginning:

HTTP Error 500.30 - ASP.NET Core app failed to start

Thanks for the tip: Can I log to Umbraco log fra Startup.cs, and how do I do it?

Hi Martin.

Does your webserver use a reverse proxy?

Hi Martin,

You should be able to inject a logger into your Configure method and write to the log:

public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILogger<Startup> logger)
{
  ...
  logger.LogInformation("Logging startup!");
  ...
}

Thanks - that works for me! :)