org.apache.tomcat.websocket.server

## Class UpgradeUtil

- java.lang.Object
- - org.apache.tomcat.websocket.server.UpgradeUtil

-     public class UpgradeUtil
      extends Object

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `static void` | `doUpgrade(WsServerContainer sc, HttpServletRequest req, HttpServletResponse resp, ServerEndpointConfig sec, Map<String,String> pathParams)`
    `static boolean` | `isWebSocketUpgradeRequest(ServletRequest request, ServletResponse response)` Checks to see if this is an HTTP request that includes a valid upgrade request to web socket.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Method Detail

    - #### isWebSocketUpgradeRequest

          public static boolean isWebSocketUpgradeRequest(ServletRequest request,
                                          ServletResponse response)

      Checks to see if this is an HTTP request that includes a valid upgrade request to web socket.

      Note: RFC 2616 does not limit HTTP upgrade to GET requests but the Java WebSocket spec 1.0, section 8.2 implies such a limitation and RFC 6455 section 4.1 requires that a WebSocket Upgrade uses GET.

      Parameters:
        `request` - The request to check if it is an HTTP upgrade request for a WebSocket connection
        `response` - The response associated with the request
      Returns:
        `true` if the request includes an HTTP Upgrade request for the WebSocket protocol, otherwise `false`

    - #### doUpgrade

          public static void doUpgrade(WsServerContainer sc,
                       HttpServletRequest req,
                       HttpServletResponse resp,
                       ServerEndpointConfig sec,
                       Map<String,String> pathParams)
                                throws ServletException,
                                       IOException

      Throws:
        `ServletException`
        `IOException`

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