@Override
public NextAction handleRead(final FilterChainContext ctx) throws IOException {
String message = (String) ctx.getMessage();
logger.log(Level.INFO, "First chunk come: {0}", message);
intermResultQueue.add(message);
Connection connection = ctx.getConnection();
connection.setBlockingReadTimeout(10, TimeUnit.SECONDS);
try {
for (int i = 0; i < clientMsgs - 1; i++) {
final ReadResult rr = ctx.read();
final String blckMsg = (String) rr.getMessage();
rr.recycle();
logger.log(Level.INFO, "Blocking chunk come: {0}", blckMsg);
intermResultQueue.add(blckMsg);
message += blckMsg;
}
} catch (Exception e) {
intermResultQueue.add(e);
return ctx.getStopAction();
}
ctx.setMessage(message);
return ctx.getInvokeAction();
}
@Override
public NextAction handleClose(final FilterChainContext ctx) throws IOException {
Socket tunnelSocket = tunnelSockets.get(ctx.getConnection());
if (tunnelSocket != null) {
tunnelSocket.close();
}
return ctx.getStopAction();
}
@Override
public NextAction handleRead(FilterChainContext ctx) throws IOException {
// Take ADD-service response
final AddResponseMessage addResponseMessage = ctx.getMessage();
// do output
LOGGER.log(Level.INFO, "Result={0}", addResponseMessage.getResult());
return ctx.getStopAction();
}
@Override
public NextAction handleRead(FilterChainContext ctx) throws IOException {
final Buffer content = ctx.getMessage();
try {
future.result(content);
} catch (Exception e) {
future.failure(e);
e.printStackTrace();
}
return ctx.getStopAction();
}
/*
* 接收
*
* @param context 上下文
* @param channel 通道
* @param buffer 缓存
* @param readable 缓存可读
* @param bytes 输入缓存
* @param offset 指向已读数据的偏移量，off之前的数据都是已用过的
* @param limit 有效长度，limit之后的长度是空白或无效数据，off到limit之间的数据是准备使用的数据
* @return 后续动作
* @throws IOException
*/
private NextAction receive(
FilterChainContext context,
Channel channel,
Buffer buffer,
int readable,
byte[] bytes,
int offset,
int limit)
throws IOException {
for (; ; ) {
int read = Math.min(readable, bytes.length - limit); // 取bytes缓存空闲区，和可读取新数据，的最小值，即：此次最多读写数据的大小
buffer.get(bytes, limit, read); // 从可读取新数据中，读取数据，尽量填满bytes缓存空闲区
limit += read; // 有效数据变长
readable -= read; // 可读数据变少
UnsafeByteArrayInputStream input =
new UnsafeByteArrayInputStream(
bytes, offset, limit - offset); // 将bytes缓存转成InputStream，不需要关闭
Object msg = upstreamCodec.decode(channel, input); // 调用Codec接口，解码数据
if (msg == Codec.NEED_MORE_INPUT) { // 如果Codec觉得数据不够，不足以解码成一个对象
if (readable == 0) { // 如果没有更多可读数据
channel.setAttribute(
BUFFER_KEY, new Object[] {bytes, offset, limit}); // 放入通道属性中，等待下一个Buffer的到来
return context.getStopAction();
} else { // 扩充或挪出空闲区，并循环，直到可读数据都加载到bytes缓存
if (offset == 0) { // 如果bytes缓存全部没有被使用，如果这时数据还不够
bytes = Bytes.copyOf(bytes, bytes.length << 1); // 将bytes缓存扩大一倍
} else { // 如果bytes缓存有一段数据已被使用
int len = limit - offset; // 计算有效数据长度
System.arraycopy(
bytes, offset, bytes, 0, len); // 将数据向前移到，压缩到已使用的部分，这样limit后面就会多出一些空闲，可以放数据
offset = 0; // 移到后，bytes缓存没有数据被使用
limit = len; // 移到后，有效数据都在bytes缓存最前面
}
}
} else { // 如果解析出一个结果
int position = input.position(); // 记录InputStream用了多少
if (position == offset) { // 如果InputStream没有被读过，就返回了数据，直接报错，否则InputStream永远读不完，会死递归
throw new IOException("Decode without read data.");
}
offset = position; // 记录已读数据
context.setMessage(msg); // 将消息改为解码后的对象，以便被后面的Filter使用。
if (limit - offset > 0 || readable > 0) { // 如果有效数据没有被读完，或者Buffer区还有未读数据
return context.getInvokeAction(
new Object[] {
buffer, readable, bytes, offset, limit
}); // 正常执行完Filter，并重新发起一轮Filter，继续读
} else { // 否则所有数据读完
return context.getInvokeAction(); // 正常执行完Filter
}
}
}
}
@Override
public NextAction handleRead(final FilterChainContext ctx) throws IOException {
final HttpContent httpContent = ctx.getMessage();
if (httpContent.isLast()) {
// Perform the cleanup logic if it's the last chunk of the payload
final HttpResponsePacket response = (HttpResponsePacket) httpContent.getHttpHeader();
recycleRequestResponsePackets(ctx.getConnection(), response);
return ctx.getStopAction();
}
return ctx.getInvokeAction();
}
@Override
public NextAction handleWrite(final FilterChainContext ctx) throws IOException {
Object message = ctx.getMessage();
if (message instanceof RequestInfoHolder) {
ctx.setMessage(null);
if (!sendAsGrizzlyRequest((RequestInfoHolder) message, ctx)) {
return ctx.getSuspendAction();
}
} else if (message instanceof Buffer) {
return ctx.getInvokeAction();
}
return ctx.getStopAction();
}
@Override
public NextAction handleRead(FilterChainContext ctx) throws IOException {
HttpContent c = (HttpContent) ctx.getMessage();
Buffer b = c.getContent();
if (b.hasRemaining()) {
sb.append(b.toStringContent());
}
// Last content from the server, set the future result so
// the client can display the result and gracefully exit.
if (c.isLast()) {
future.result(sb.toString());
}
return ctx.getStopAction(); // discontinue filter chain execution
}
@SuppressWarnings("unchecked")
@Override
public NextAction handleEvent(final FilterChainContext ctx, final FilterChainEvent event)
throws IOException {
final Object type = event.type();
if (type == ContinueEvent.class) {
final ContinueEvent continueEvent = (ContinueEvent) event;
((ExpectHandler) continueEvent.getContext().getBodyHandler()).finish(ctx);
} else if (type == TunnelRequestEvent.class) {
// Disable SSL for the time being...
ctx.notifyDownstream(new SSLSwitchingEvent(false, ctx.getConnection()));
ctx.suspend();
TunnelRequestEvent tunnelRequestEvent = (TunnelRequestEvent) event;
final ProxyServer proxyServer = tunnelRequestEvent.getProxyServer();
final URI requestUri = tunnelRequestEvent.getUri();
RequestBuilder builder = new RequestBuilder();
builder.setMethod(Method.CONNECT.getMethodString());
builder.setUrl("http://" + getAuthority(requestUri));
Request request = builder.build();
AsyncHandler handler =
new AsyncCompletionHandler() {
@Override
public Object onCompleted(Response response) throws Exception {
if (response.getStatusCode() != 200) {
PROXY_AUTH_FAILURE.set(ctx.getConnection(), Boolean.TRUE);
}
ctx.notifyDownstream(new SSLSwitchingEvent(true, ctx.getConnection()));
ctx.notifyDownstream(event);
return response;
}
};
final GrizzlyResponseFuture future =
new GrizzlyResponseFuture(grizzlyAsyncHttpProvider, request, handler, proxyServer);
future.setDelegate(SafeFutureImpl.create());
grizzlyAsyncHttpProvider.execute(
ctx.getConnection(), request, handler, future, HttpTxContext.get(ctx));
return ctx.getSuspendAction();
}
return ctx.getStopAction();
}
@Override
public NextAction handleRead(FilterChainContext context) throws IOException {
Object message = context.getMessage();
Connection<?> connection = context.getConnection();
Channel channel = GrizzlyChannel.getOrAddChannel(connection, url, handler);
try {
if (message instanceof Buffer) { // 收到新的数据包
Buffer buffer = (Buffer) message; // 缓存
int readable = buffer.capacity(); // 本次可读取新数据的大小
if (readable == 0) {
return context.getStopAction();
}
byte[] bytes; // byte[]缓存区，将Buffer转成byte[]，再转成UnsafeByteArrayInputStream
int offset; // 指向已用数据的偏移量，off之前的数据都是已用过的
int limit; // 有效长度，limit之后的长度是空白或无效数据，off到limit之间的数据是准备使用的有效数据
Object[] remainder = (Object[]) channel.getAttribute(BUFFER_KEY); // 上次序列化剩下的数据
channel.removeAttribute(BUFFER_KEY);
if (remainder == null) { // 如果没有，创建新的bytes缓存
bytes = new byte[bufferSize];
offset = 0;
limit = 0;
} else { // 如果有，使用剩下的bytes缓存
bytes = (byte[]) remainder[0];
offset = (Integer) remainder[1];
limit = (Integer) remainder[2];
}
return receive(context, channel, buffer, readable, bytes, offset, limit);
} else if (message instanceof Object[]) { // 同一Buffer多轮Filter，即：一个Buffer里有多个请求
Object[] remainder = (Object[]) message;
Buffer buffer = (Buffer) remainder[0];
int readable = (Integer) remainder[1];
byte[] bytes = (byte[]) remainder[2];
int offset = (Integer) remainder[3];
int limit = (Integer) remainder[4];
return receive(context, channel, buffer, readable, bytes, offset, limit);
} else { // 其它事件直接往下传
return context.getInvokeAction();
}
} finally {
GrizzlyChannel.removeChannelIfDisconnectd(connection);
}
}
@Override
public NextAction handleRead(FilterChainContext ctx) throws IOException {
final Object message = ctx.getMessage();
if (_logger.isDebugEnabled()) {
_logger.debug(String.format("%s: Got [%s] from [%s].", this, message, ctx.getAddress()));
}
String responseXML = _coreCommandProcessor.processCommand((String) message);
if (_logger.isDebugEnabled()) {
_logger.debug(
String.format("%s: Returning [%s] to [%s].", this, responseXML, ctx.getAddress()));
}
ctx.write(ctx.getAddress(), responseXML, null);
// Close the connection
ctx.getConnection().closeSilently();
return ctx.getStopAction();
}
@SuppressWarnings({"unchecked"})
@Override
public NextAction handleConnect(FilterChainContext ctx) throws IOException {
System.out.println("\nClient connected!\n");
HttpRequestPacket request = createRequest();
System.out.println("Writing request:\n");
System.out.println(request.toString());
ctx.write(request); // write the request
// for each of the content parts in CONTENT, wrap in a Buffer,
// create the HttpContent to wrap the buffer and write the
// content.
MemoryManager mm = ctx.getMemoryManager();
for (int i = 0, len = CONTENT.length; i < len; i++) {
HttpContent.Builder contentBuilder = request.httpContentBuilder();
Buffer b = Buffers.wrap(mm, CONTENT[i]);
contentBuilder.content(b);
HttpContent content = contentBuilder.build();
System.out.printf("(Client writing: %s)\n", b.toStringContent());
ctx.write(content);
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
// since the request created by createRequest() is chunked,
// we need to write the trailer to signify the end of the
// POST data
ctx.write(request.httpTrailerBuilder().build());
System.out.println("\n");
return ctx.getStopAction(); // discontinue filter chain execution
}
@Override
public NextAction handleRead(FilterChainContext ctx) throws IOException {
// Get the parsed HttpContent (we assume prev. filter was HTTP)
HttpContent message = ctx.getMessage();
Socket tunnelSocket = tunnelSockets.get(ctx.getConnection());
if (tunnelSocket == null) {
// handle connection procedure
return GrizzlyModProxy.this.handleConnect(ctx, message);
}
if (message.getContent().hasRemaining()) {
// relay the content to the tunnel connection
Buffer buffer = message.getContent();
message.recycle();
tunnelSocket
.getOutputStream()
.write(buffer.array(), buffer.arrayOffset(), buffer.remaining());
}
return ctx.getStopAction();
}
/**
* Method invoked when a first massage (Assumed to be HTTP) is received. Normally this would be
* HTTP CONNECT and this method processes it and opens a connection to the destination (the server
* that the client wants to access).
*
* <p>This method can be overridden to provide a test-specific handling of the CONNECT method.
*/
protected NextAction handleConnect(FilterChainContext ctx, HttpContent content) {
System.out.println("Handle CONNECT start . . .");
HttpHeader httpHeader = content.getHttpHeader();
HttpRequestPacket requestPacket = (HttpRequestPacket) httpHeader.getHttpHeader();
if (!requestPacket.getMethod().matchesMethod("CONNECT")) {
System.out.println("Received method is not CONNECT");
writeHttpResponse(ctx, 400);
return ctx.getStopAction();
}
String destinationUri = requestPacket.getRequestURI();
// We expect URI in form host:port, this is not flexible, but we use it only to test our clients
int colonIdx = destinationUri.indexOf(':');
if (colonIdx == -1) {
System.out.println("Destination URI not in host:port format: " + destinationUri);
writeHttpResponse(ctx, 400);
return ctx.getStopAction();
}
String hostName = destinationUri.substring(0, colonIdx);
String portStr = destinationUri.substring(colonIdx + 1);
int port;
try {
port = Integer.parseInt(portStr);
} catch (Throwable t) {
System.out.println("Could not parse destination port: " + portStr);
writeHttpResponse(ctx, 400);
return ctx.getStopAction();
}
try {
Socket tunnelSocket = new Socket(hostName, port);
Connection grizzlyConnection = ctx.getConnection();
tunnelSockets.set(grizzlyConnection, tunnelSocket);
TunnelSocketReader tunnelSocketReader =
new TunnelSocketReader(tunnelSocket, grizzlyConnection);
executorService.submit(tunnelSocketReader::read);
} catch (IOException e) {
writeHttpResponse(ctx, 400);
return ctx.getStopAction();
}
// Grizzly does not like CONNECT method and sets "keep alive" to false, if it is present
// This hacks Grizzly, so it will keep the connection open
HttpRequestPacket request = getHttpRequest(ctx);
request.getResponse().getProcessingState().setKeepAlive(true);
request.getResponse().setContentLength(0);
request.setMethod("GET");
// end of hack
writeHttpResponse(ctx, 200);
System.out.println("Connection to proxy established.");
return ctx.getStopAction();
}
/**
* Initiates asynchronous data receiving.
*
* <p>This is service method, usually users don't have to call it explicitly.
*/
public void initiateAsyncronousDataReceiving() {
// fork the FilterChainContext execution
// keep the current FilterChainContext suspended, but make a copy and resume it
ctx.fork(ctx.getStopAction());
}
