csrf example

gistfile1.html

  <form id="form" name="form" method="post" action="/signin">
        <h1>Sign-in form</h1>

        <div><label>Username
        </label>
            <input type="text" name="user[username]" class="required" id="username"/></div>

        <div>
            <input type="password" name="user[password]" class="required" id="password"/></div>

        <input type="hidden" name="_csrf" value={_csrf} id="_csrf"/>

        <button type="submit">Sign-in</button>
    </form>