too many redirects

[seminal]

I'm following the wiki's guidelines with:

   server {
   server_name mike.example.com;
   rewrite ^ http://www.example.com$request_uri? permanent;
}

I'm getting a "this page has too many redirects error".  So I tried:

location = example.com { rewrite example.com www.example.com permanent; }

This worked after I had gone to www.example.com but if I clear the cache and
first go to example.com (like a first-time user) I get a "DNS lookup
failed."

Any suggestions, thanks.

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