curlでのヘッダーの記述方法
curl -H "Accept: text/html" http://localhost:3000/info/howmany/5 curl -H "Accept: application/xml" http://localhost:3000/info/who_bought/2
curl -H "Accept: text/html" http://localhost:3000/info/howmany/5 curl -H "Accept: application/xml" http://localhost:3000/info/who_bought/2