UpgradeCodec Type — netty Architecture

Source Code

codec-http/src/main/java/io/netty/handler/codec/http/HttpClientUpgradeHandler.java lines 83–104

    public interface UpgradeCodec {
        /**
         * Returns the name of the protocol supported by this codec, as indicated by the {@code 'UPGRADE'} header.
         */
        CharSequence protocol();

        /**
         * Sets any protocol-specific headers required to the upgrade request. Returns the names of
         * all headers that were added. These headers will be used to populate the CONNECTION header.
         */
        Collection<CharSequence> setUpgradeHeaders(ChannelHandlerContext ctx, HttpRequest upgradeRequest);

        /**
         * Performs an HTTP protocol upgrade from the source codec. This method is responsible for
         * adding all handlers required for the new protocol.
         *
         * @param ctx the context for the current handler.
         * @param upgradeResponse the 101 Switching Protocols response that indicates that the server
         *            has switched to this protocol.
         */
        void upgradeTo(ChannelHandlerContext ctx, FullHttpResponse upgradeResponse) throws Exception;
    }