private static FilterChainContext obtainProtocolChainContext(
final FilterChainContext ctx, final FilterChain completeProtocolFilterChain) {
final FilterChainContext newFilterChainContext =
completeProtocolFilterChain.obtainFilterChainContext(
ctx.getConnection(),
ctx.getStartIdx() + 1,
completeProtocolFilterChain.size(),
ctx.getFilterIdx() + 1);
newFilterChainContext.setAddressHolder(ctx.getAddressHolder());
newFilterChainContext.setMessage(ctx.getMessage());
newFilterChainContext.getInternalContext().setIoEvent(ctx.getInternalContext().getIoEvent());
ctx.getConnection().setProcessor(completeProtocolFilterChain);
return newFilterChainContext;
}
@Override
public NextAction handleWrite(FilterChainContext context) throws IOException {
Connection<?> connection = context.getConnection();
GrizzlyChannel channel = GrizzlyChannel.getOrAddChannel(connection, url, handler);
try {
UnsafeByteArrayOutputStream output = new UnsafeByteArrayOutputStream(1024); // 不需要关闭
if (!(context.getMessage() instanceof Response)) {
downstreamCodec.encode(channel, output, context.getMessage());
} else {
upstreamCodec.encode(channel, output, context.getMessage());
}
GrizzlyChannel.removeChannelIfDisconnectd(connection);
byte[] bytes = output.toByteArray();
Buffer buffer = connection.getTransport().getMemoryManager().allocate(bytes.length);
buffer.put(bytes);
buffer.flip();
buffer.allowBufferDispose(true);
context.setMessage(buffer);
} finally {
GrizzlyChannel.removeChannelIfDisconnectd(connection);
}
return context.getInvokeAction();
}
@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();
}
@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();
}
private static boolean checkHandshakeError(
final FilterChainContext ctx, final HttpTxContext httpCtx) {
Throwable t = getHandshakeError(ctx.getConnection());
if (t != null) {
httpCtx.abort(t);
return true;
}
return false;
}
@Override
public NextAction handleClose(final FilterChainContext ctx) throws IOException {
Socket tunnelSocket = tunnelSockets.get(ctx.getConnection());
if (tunnelSocket != null) {
tunnelSocket.close();
}
return ctx.getStopAction();
}
private static boolean checkProxyAuthFailure(
final FilterChainContext ctx, final HttpTxContext httpCtx) {
final Boolean failed = PROXY_AUTH_FAILURE.get(ctx.getConnection());
if (failed != null && failed) {
httpCtx.abort(new IllegalStateException("Unable to authenticate with proxy"));
return true;
}
return false;
}
@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();
}
private static FilterChainContext checkAndHandleFilterChainUpdate(
final FilterChainContext ctx, final FilterChainContext sendingCtx) {
FilterChainContext ctxLocal = sendingCtx;
SSLConnectionContext sslCtx = SSLUtils.getSslConnectionContext(ctx.getConnection());
if (sslCtx != null) {
FilterChain fc = sslCtx.getNewConnectionFilterChain();
if (fc != null) {
// Create a new FilterChain context using the new
// FilterChain.
// TODO: We need to mark this connection somehow
// as being only suitable for this type of
// request.
ctxLocal = obtainProtocolChainContext(ctx, fc);
}
}
return ctxLocal;
}
@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();
}
/**
* Per-request initialization required for the InputBuffer to function properly.
*
* @param httpHeader the header from which input will be obtained.
* @param ctx the FilterChainContext for the chain processing this request
*/
public void initialize(final HttpHeader httpHeader, final FilterChainContext ctx) {
if (ctx == null) {
throw new IllegalArgumentException("ctx cannot be null.");
}
this.httpHeader = httpHeader;
this.ctx = ctx;
connection = ctx.getConnection();
final Object message = ctx.getMessage();
if (message instanceof HttpContent) {
final HttpContent content = (HttpContent) message;
// Check if HttpContent is chunked message trailer w/ headers
checkHttpTrailer(content);
updateInputContentBuffer(content.getContent());
contentRead = content.isLast();
content.recycle();
if (LOGGER.isLoggable(LOGGER_LEVEL)) {
log("InputBuffer %s initialize with ready content: %s", this, inputContentBuffer);
}
}
}
@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 is called, when new client {@link Connection} was connected to some endpoint
*
* @param ctx the filter chain context
* @return the next action to be executed by chain
* @throws java.io.IOException
*/
@Override
public NextAction handleConnect(FilterChainContext ctx) throws IOException {
newConnection(ctx.getConnection());
return ctx.getInvokeAction();
}
/**
* Method is called, when the {@link Connection} is getting closed
*
* @param ctx the filter chain context
* @return the next action to be executed by chain
* @throws java.io.IOException
*/
@Override
public NextAction handleClose(FilterChainContext ctx) throws IOException {
activeConnectionsMap.remove(ctx.getConnection());
return ctx.getInvokeAction();
}
/**
* 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();
}
private boolean sendAsGrizzlyRequest(
final RequestInfoHolder requestInfoHolder, final FilterChainContext ctx) throws IOException {
HttpTxContext httpTxContext = requestInfoHolder.getHttpTxContext();
if (httpTxContext == null) {
httpTxContext = HttpTxContext.create(requestInfoHolder);
}
if (checkProxyAuthFailure(ctx, httpTxContext)) {
return true;
}
final Request request = httpTxContext.getRequest();
final URI uri = request.isUseRawUrl() ? request.getRawURI() : request.getURI();
boolean secure = Utils.isSecure(uri);
// If the request is secure, check to see if an error occurred during
// the handshake. We have to do this here, as the error would occur
// out of the scope of a HttpTxContext so there would be
// no good way to communicate the problem to the caller.
if (secure && checkHandshakeError(ctx, httpTxContext)) {
return true;
}
if (isUpgradeRequest(httpTxContext.getHandler())
&& isWSRequest(httpTxContext.getRequestUrl())) {
httpTxContext.setWSRequest(true);
convertToUpgradeRequest(httpTxContext);
}
HttpRequestPacket requestPacket = requestCache.poll();
if (requestPacket == null) {
requestPacket = new HttpRequestPacketImpl();
}
requestPacket.setMethod(request.getMethod());
requestPacket.setProtocol(Protocol.HTTP_1_1);
// Special handling for CONNECT.
if (Method.CONNECT.matchesMethod(request.getMethod())) {
final int port = uri.getPort();
requestPacket.setRequestURI(uri.getHost() + ':' + (port == -1 ? 443 : port));
} else {
requestPacket.setRequestURI(uri.getPath());
}
if (Utils.requestHasEntityBody(request)) {
final long contentLength = request.getContentLength();
if (contentLength >= 0) {
requestPacket.setContentLengthLong(contentLength);
requestPacket.setChunked(false);
} else {
requestPacket.setChunked(true);
}
}
if (httpTxContext.isWSRequest()) {
try {
final URI wsURI = new URI(httpTxContext.getWsRequestURI());
httpTxContext.setProtocolHandler(Version.RFC6455.createHandler(true));
httpTxContext.setHandshake(httpTxContext.getProtocolHandler().createHandShake(wsURI));
requestPacket =
(HttpRequestPacket) httpTxContext.getHandshake().composeHeaders().getHttpHeader();
} catch (URISyntaxException e) {
throw new IllegalArgumentException("Invalid WS URI: " + httpTxContext.getWsRequestURI());
}
}
requestPacket.setSecure(secure);
addQueryString(request, requestPacket);
addHostHeader(request, uri, requestPacket);
addGeneralHeaders(request, requestPacket);
addCookies(request, requestPacket);
initTransferCompletionHandler(request, httpTxContext.getHandler());
final HttpRequestPacket requestPacketLocal = requestPacket;
FilterChainContext sendingCtx = ctx;
if (secure) {
// Check to see if the ProtocolNegotiator has given
// us a different FilterChain to use. If so, we need
// use a different FilterChainContext when invoking sendRequest().
sendingCtx = checkAndHandleFilterChainUpdate(ctx, sendingCtx);
}
final Connection c = ctx.getConnection();
if (!Utils.isSpdyConnection(c)) {
HttpContext.newInstance(ctx, c, c, c);
} else {
SpdySession session = SpdySession.get(c);
final Lock lock = session.getNewClientStreamLock();
try {
lock.lock();
SpdyStream stream =
session.openStream(
requestPacketLocal,
session.getNextLocalStreamId(),
0,
0,
0,
false,
!requestPacketLocal.isExpectContent());
HttpContext.newInstance(ctx, stream, stream, stream);
} finally {
lock.unlock();
}
}
HttpTxContext.set(ctx, httpTxContext);
return sendRequest(sendingCtx, request, requestPacketLocal);
}