ServerHandler Class — netty Architecture

Source Code

testsuite/src/main/java/io/netty/testsuite/transport/socket/SocketSslGreetingTest.java lines 217–278

    private static class ServerHandler extends SimpleChannelInboundHandler<String> {
        volatile Channel channel;
        final AtomicReference<Throwable> exception = new AtomicReference<Throwable>();

        @Override
        protected void channelRead0(ChannelHandlerContext ctx, String msg) throws Exception {
            // discard
        }

        @Override
        public void channelActive(ChannelHandlerContext ctx)
                throws Exception {
            channel = ctx.channel();
            channel.writeAndFlush(ctx.alloc().buffer().writeByte('a'));
        }

        @Override
        public void exceptionCaught(ChannelHandlerContext ctx,
                                    Throwable cause) throws Exception {
            if (logger.isWarnEnabled()) {
                logger.warn("Unexpected exception from the server side", cause);
            }

            exception.compareAndSet(null, cause);
            ctx.close();
        }

        @Override
        public void userEventTriggered(final ChannelHandlerContext ctx, final Object evt) throws Exception {
            if (evt instanceof SslHandshakeCompletionEvent) {
                final SslHandshakeCompletionEvent event = (SslHandshakeCompletionEvent) evt;
                if (event.isSuccess()) {
                    SSLSession session = ctx.pipeline().get(SslHandler.class).engine().getSession();
                    try {
                        session.getPeerCertificates();
                        fail();
                    } catch (SSLPeerUnverifiedException e) {
                        // expected
                    }
                    try {
                        session.getPeerCertificateChain();
                        fail();
                    } catch (SSLPeerUnverifiedException e) {
                        // expected
                    } catch (UnsupportedOperationException e) {
                        // Starting from Java15 this method throws UnsupportedOperationException as it was
                        // deprecated before and getPeerCertificates() should be used
                        if (PlatformDependent.javaVersion() < 15) {
                            throw e;
                        }
                    }
                    try {
                        session.getPeerPrincipal();
                        fail();
                    } catch (SSLPeerUnverifiedException e) {
                        // expected
                    }
                }
            }
            ctx.fireUserEventTriggered(evt);
        }
    }