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com.alibaba.arthas.tunnel.server.TunnelSocketFrameHandler Maven / Gradle / Ivy
package com.alibaba.arthas.tunnel.server;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URLDecoder;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.TimeUnit;
import org.apache.commons.lang3.RandomStringUtils;
import org.apache.tomcat.util.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.MultiValueMap;
import org.springframework.web.util.UriComponentsBuilder;
import com.alibaba.arthas.tunnel.common.MethodConstants;
import com.alibaba.arthas.tunnel.common.SimpleHttpResponse;
import com.alibaba.arthas.tunnel.common.URIConstans;
import com.alibaba.arthas.tunnel.server.utils.HttpUtils;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.QueryStringDecoder;
import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import io.netty.handler.codec.http.websocketx.WebSocketFrame;
import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler.HandshakeComplete;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.FutureListener;
import io.netty.util.concurrent.GenericFutureListener;
import io.netty.util.concurrent.GlobalEventExecutor;
import io.netty.util.concurrent.Promise;
/**
*
* @author hengyunabc 2019-08-27
*
*/
public class TunnelSocketFrameHandler extends SimpleChannelInboundHandler {
private final static Logger logger = LoggerFactory.getLogger(TunnelSocketFrameHandler.class);
private TunnelServer tunnelServer;
public TunnelSocketFrameHandler(TunnelServer tunnelServer) {
this.tunnelServer = tunnelServer;
}
@Override
public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
if (evt instanceof HandshakeComplete) {
HandshakeComplete handshake = (HandshakeComplete) evt;
// http request uri
String uri = handshake.requestUri();
logger.info("websocket handshake complete, uri: {}", uri);
MultiValueMap parameters = UriComponentsBuilder.fromUriString(uri).build().getQueryParams();
String method = parameters.getFirst(URIConstans.METHOD);
if (MethodConstants.CONNECT_ARTHAS.equals(method)) { // form browser
connectArthas(ctx, parameters);
} else if (MethodConstants.AGENT_REGISTER.equals(method)) { // form arthas agent, register
agentRegister(ctx, handshake, uri);
}
if (MethodConstants.OPEN_TUNNEL.equals(method)) { // from arthas agent open tunnel
String clientConnectionId = parameters.getFirst(URIConstans.CLIENT_CONNECTION_ID);
openTunnel(ctx, clientConnectionId);
}
} else {
ctx.fireUserEventTriggered(evt);
}
}
@Override
protected void channelRead0(ChannelHandlerContext ctx, WebSocketFrame frame) throws Exception {
// 只有 arthas agent register建立的 channel 才可能有数据到这里
if (frame instanceof TextWebSocketFrame) {
TextWebSocketFrame textFrame = (TextWebSocketFrame) frame;
String text = textFrame.text();
MultiValueMap parameters = UriComponentsBuilder.fromUriString(text).build()
.getQueryParams();
String method = parameters.getFirst(URIConstans.METHOD);
/**
*
* 1. 之前http proxy请求已发送到 tunnel cleint，这里接收到 tunnel client的结果，并解析出SimpleHttpResponse
* 2. 需要据 URIConstans.PROXY_REQUEST_ID 取出当时的 Promise，再设置SimpleHttpResponse进去
*
*/
if (MethodConstants.HTTP_PROXY.equals(method)) {
String requestId = URLDecoder.decode(parameters.getFirst(URIConstans.PROXY_REQUEST_ID), "utf-8");
if (requestId == null) {
logger.error("error, need {}, text: {}", URIConstans.PROXY_REQUEST_ID, text);
return;
}
logger.info("received http proxy response, requestId: {}", requestId);
Promise promise = tunnelServer.findProxyRequestPromise(requestId);
String data = URLDecoder.decode(parameters.getFirst(URIConstans.PROXY_RESPONSE_DATA), "utf-8");
byte[] bytes = Base64.decodeBase64(data);
SimpleHttpResponse simpleHttpResponse = SimpleHttpResponse.fromBytes(bytes);
promise.setSuccess(simpleHttpResponse);
}
}
}
private void connectArthas(ChannelHandlerContext tunnelSocketCtx, MultiValueMap parameters)
throws URISyntaxException {
List agentId = parameters.getOrDefault("id", Collections.emptyList());
if (agentId.isEmpty()) {
logger.error("arthas agent id can not be null, parameters: {}", parameters);
throw new IllegalArgumentException("arthas agent id can not be null");
}
logger.info("try to connect to arthas agent, id: " + agentId.get(0));
Optional findAgent = tunnelServer.findAgent(agentId.get(0));
if (findAgent.isPresent()) {
ChannelHandlerContext agentCtx = findAgent.get().getChannelHandlerContext();
String clientConnectionId = RandomStringUtils.random(20, true, true).toUpperCase();
logger.info("random clientConnectionId: " + clientConnectionId);
// URI uri = new URI("response", null, "/",
// "method=" + MethodConstants.START_TUNNEL + "&id=" + agentId.get(0) + "&clientConnectionId=" + clientConnectionId, null);
URI uri = UriComponentsBuilder.newInstance().scheme(URIConstans.RESPONSE).path("/")
.queryParam(URIConstans.METHOD, MethodConstants.START_TUNNEL).queryParam(URIConstans.ID, agentId)
.queryParam(URIConstans.CLIENT_CONNECTION_ID, clientConnectionId).build().toUri();
logger.info("startTunnel response: " + uri);
ClientConnectionInfo clientConnectionInfo = new ClientConnectionInfo();
SocketAddress remoteAddress = tunnelSocketCtx.channel().remoteAddress();
if (remoteAddress instanceof InetSocketAddress) {
InetSocketAddress inetSocketAddress = (InetSocketAddress) remoteAddress;
clientConnectionInfo.setHost(inetSocketAddress.getHostString());
clientConnectionInfo.setPort(inetSocketAddress.getPort());
}
clientConnectionInfo.setChannelHandlerContext(tunnelSocketCtx);
// when the agent open tunnel success, will set result into the promise
Promise promise = GlobalEventExecutor.INSTANCE.newPromise();
promise.addListener(new FutureListener() {
@Override
public void operationComplete(final Future future) throws Exception {
final Channel outboundChannel = future.getNow();
if (future.isSuccess()) {
tunnelSocketCtx.pipeline().remove(TunnelSocketFrameHandler.this);
// outboundChannel is form arthas agent
outboundChannel.pipeline().removeLast();
outboundChannel.pipeline().addLast(new RelayHandler(tunnelSocketCtx.channel()));
tunnelSocketCtx.pipeline().addLast(new RelayHandler(outboundChannel));
} else {
logger.error("wait for agent connect error. agentId: {}, clientConnectionId: {}", agentId,
clientConnectionId);
ChannelUtils.closeOnFlush(agentCtx.channel());
}
}
});
clientConnectionInfo.setPromise(promise);
this.tunnelServer.addClientConnectionInfo(clientConnectionId, clientConnectionInfo);
tunnelSocketCtx.channel().closeFuture().addListener(new GenericFutureListener>() {
@Override
public void operationComplete(Future future) throws Exception {
tunnelServer.removeClientConnectionInfo(clientConnectionId);
}
});
agentCtx.channel().writeAndFlush(new TextWebSocketFrame(uri.toString()));
logger.info("browser connect waitting for arthas agent open tunnel");
boolean watiResult = promise.awaitUninterruptibly(20, TimeUnit.SECONDS);
if (watiResult) {
logger.info(
"browser connect wait for arthas agent open tunnel success, agentId: {}, clientConnectionId: {}",
agentId, clientConnectionId);
} else {
logger.error(
"browser connect wait for arthas agent open tunnel timeout, agentId: {}, clientConnectionId: {}",
agentId, clientConnectionId);
tunnelSocketCtx.close();
}
} else {
tunnelSocketCtx.channel().writeAndFlush(new CloseWebSocketFrame(2000, "Can not find arthas agent by id: "+ agentId));
logger.error("Can not find arthas agent by id: {}", agentId);
throw new IllegalArgumentException("Can not find arthas agent by id: " + agentId);
}
}
private void agentRegister(ChannelHandlerContext ctx, HandshakeComplete handshake, String requestUri) throws URISyntaxException {
QueryStringDecoder queryDecoder = new QueryStringDecoder(requestUri);
Map> parameters = queryDecoder.parameters();
String appName = null;
List appNameList = parameters.get(URIConstans.APP_NAME);
if (appNameList != null && !appNameList.isEmpty()) {
appName = appNameList.get(0);
}
// generate a random agent id
String id = null;
if (appName != null) {
// 如果有传 app name，则生成带 app name前缀的id，方便管理
id = appName + "_" + RandomStringUtils.random(20, true, true).toUpperCase();
} else {
id = RandomStringUtils.random(20, true, true).toUpperCase();
}
// agent传过来，则优先用 agent的
List idList = parameters.get(URIConstans.ID);
if (idList != null && !idList.isEmpty()) {
id = idList.get(0);
}
String arthasVersion = null;
List arthasVersionList = parameters.get(URIConstans.ARTHAS_VERSION);
if (arthasVersionList != null && !arthasVersionList.isEmpty()) {
arthasVersion = arthasVersionList.get(0);
}
final String finalId = id;
// URI responseUri = new URI("response", null, "/", "method=" + MethodConstants.AGENT_REGISTER + "&id=" + id, null);
URI responseUri = UriComponentsBuilder.newInstance().scheme(URIConstans.RESPONSE).path("/")
.queryParam(URIConstans.METHOD, MethodConstants.AGENT_REGISTER).queryParam(URIConstans.ID, id).build()
.encode().toUri();
AgentInfo info = new AgentInfo();
// 前面可能有nginx代理
HttpHeaders headers = handshake.requestHeaders();
String host = HttpUtils.findClientIP(headers);
if (host == null) {
SocketAddress remoteAddress = ctx.channel().remoteAddress();
if (remoteAddress instanceof InetSocketAddress) {
InetSocketAddress inetSocketAddress = (InetSocketAddress) remoteAddress;
info.setHost(inetSocketAddress.getHostString());
info.setPort(inetSocketAddress.getPort());
}
} else {
info.setHost(host);
Integer port = HttpUtils.findClientPort(headers);
if (port != null) {
info.setPort(port);
}
}
info.setChannelHandlerContext(ctx);
if (arthasVersion != null) {
info.setArthasVersion(arthasVersion);
}
tunnelServer.addAgent(id, info);
ctx.channel().closeFuture().addListener(new GenericFutureListener>() {
@Override
public void operationComplete(Future future) throws Exception {
tunnelServer.removeAgent(finalId);
}
});
ctx.channel().writeAndFlush(new TextWebSocketFrame(responseUri.toString()));
}
private void openTunnel(ChannelHandlerContext ctx, String clientConnectionId) {
Optional infoOptional = this.tunnelServer.findClientConnection(clientConnectionId);
if (infoOptional.isPresent()) {
ClientConnectionInfo info = infoOptional.get();
logger.info("openTunnel clientConnectionId:" + clientConnectionId);
Promise promise = info.getPromise();
promise.setSuccess(ctx.channel());
} else {
logger.error("Can not find client connection by id: {}", clientConnectionId);
}
}
}
