http://www.jboss.org/jboss-servlet-api_4.0_spec: The Java Servlet 4.0 API classes (JBoss by Red Hat) 
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package javax.servlet.http;

import java.io.IOException;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletOutputStream;


This interface encapsulates the connection for an upgrade request.
It allows the protocol handler to send service requests and status
queries to the container.

Since:Servlet 3.1
/**
 * This interface encapsulates the connection for an upgrade request.
 * It allows the protocol handler to send service requests and status
 * queries to the container.
 *
 * @since Servlet 3.1
 */

public interface WebConnection extends AutoCloseable {
    
Returns an input stream for this web connection.

Throws:
Returns:a ServletInputStream for reading binary data
/**
     * Returns an input stream for this web connection.
     *
     * @return a ServletInputStream for reading binary data
     *
     * @exception IOException if an I/O error occurs
     */
    public ServletInputStream getInputStream() throws IOException;

    
Returns an output stream for this web connection.

Throws:
Returns:a ServletOutputStream for writing binary data
/**
     * Returns an output stream for this web connection.
     *
     * @return a ServletOutputStream for writing binary data
     *
     * @exception IOException if an I/O error occurs
     */
    public ServletOutputStream getOutputStream() throws IOException;
}