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Complex redirect: HTTP to HTTPS + port on localhost and naked domain to www, except on localhost

I made a ASP.NET/C# solution. Basically:

private void Application_BeginRequest()
    var canonicalAuthority =
                                 ?? this.Request.Url.Authority;
    // TODO: Might not work with International Domain Names.
    if (!Request.IsSecureConnection
        || !this.Request.Url.Authority.Equals(canonicalAuthority,
        string path = "https://" + canonicalAuthority +
        this.Response.RedirectPermanent(path, false);

Note the TODO: I think there might be problems with URL encoding of international domain names, but it could probably be fixed by using Uri.Compare.

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