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<!DOCTYPE document [
  <!ENTITY project SYSTEM "project.xml">
]>
<document url="cookie-processor.html">

  &project;

  <properties>
    <title>The Cookie Processor Component</title>
  </properties>

<body>

<section name="Table of Contents">
<toc />
</section>

<section name="Introduction">

  <p>The <strong>CookieProcessor</strong> element represents the component that
  parses received cookie headers into <code>jakarta.servlet.http.Cookie</code>
  objects accessible through <code>HttpServletRequest.getCookies()</code> and
  converts <code>jakarta.servlet.http.Cookie</code> objects added to the response
  through <code>HttpServletResponse.addCookie()</code> to the HTTP headers
  returned to the client.</p>

  <p>A CookieProcessor element MAY be nested inside a
  <a href="context.html">Context</a> component. If it is not included, a default
  implementation will be created automatically.</p>

</section>


<section name="Attributes">

  <subsection name="Common Attributes">

    <p>All implementations of <strong>CookieProcessor</strong> support the
    following attributes:</p>

    <attributes>

      <attribute name="className" required="false">
        <p>Java class name of the implementation to use. This class must
        implement the <code>org.apache.tomcat.util.http.CookieProcessor</code>
        interface. If not specified, the standard value (defined below) will be
        used.</p>
      </attribute>

    </attributes>

  </subsection>


  <subsection name="Standard Implementation">

    <p>The standard implementation of <strong>CookieProcessor</strong> is
    <code>org.apache.tomcat.util.http.Rfc6265CookieProcessor</code>.</p>

    <p>This cookie processor is based on RFC6265 with the following changes to
    support better interoperability:</p>

    <ul>
      <li>Values 0x80 to 0xFF are permitted in cookie-octet to support the use
      of UTF-8 in cookie values as used by HTML 5.</li>
      <li>For cookies without a value, the '=' is not required after the name as
      some browsers do not sent it.</li>
    </ul>

    <p>The RFC 6265 cookie processor is generally more lenient than the legacy
    cookie parser. In particular:</p>

    <ul>
      <li>The '<code>=</code>' and '<code>/</code>' characters are always
      permitted in a cookie value.</li>
      <li>Name only cookies are always permitted.</li>
      <li>The cookie header is always preserved.</li>
    </ul>

    <p>The <strong>RFC 6265 Cookie Processor</strong> supports the following
    additional attributes.</p>

    <attributes>

      <attribute name="cookiesWithoutEquals" required="false">
        <p>Determines how a cookie received from a user agent should be
        interpreted when the name value pair does not contain an equals sign.
        The default value is <code>name</code> which means that the cookie will
        be treated as a cookie with a name but no value. The other option is
        <code>ignore</code> which means the cookie will be ignored. From Tomcat
        12 onwards the default will be <code>ignore</code>.</p>
      </attribute>

      <attribute name="partitioned" required="false">
       <p>Should the Partitioned flag be set on cookies? Defaults to <code>false</code>.</p>
       <p>Note: The name of the attribute used to indicate a partitioned cookie as part of
       <a href="https://developers.google.com/privacy-sandbox/3pcd#partitioned">CHIPS</a> is not defined by an RFC and
       may change in a non-backwards compatible way once equivalent functionality is included in an RFC.</p>
      </attribute>

      <attribute name="sameSiteCookies" required="false">
        <p>Enables setting same-site cookie attribute.</p>

        <p>If value is <code>unset</code> then the same-site cookie attribute
        won't be set. This is the default value.</p>

        <p>If value is <code>none</code> then the same-site cookie attribute
        will be set and the cookie will always be sent in cross-site requests.</p>

        <p>If value is <code>lax</code> then the browser only sends the cookie
        in same-site requests and cross-site top level GET requests.</p>

        <p>If value is <code>strict</code> then the browser prevents sending the
        cookie in any cross-site request.</p>
      </attribute>

    </attributes>

  </subsection>

</section>


<section name="Nested Components">

  <p>No element may be nested inside a <strong>CookieProcessor</strong>.</p>

</section>


<section name="Special Features">

  <p>No special features are associated with a <strong>CookieProcessor</strong>
  element.</p>

</section>

</body>

</document>
