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See the License for the specific language governing permissions and limitations under the License. */ package net.dreamlu.iot.mqtt.core.server.http.core; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.tio.core.ChannelContext; import org.tio.core.Tio; import org.tio.core.TioConfig; import org.tio.core.exception.TioDecodeException; import org.tio.core.intf.Packet; import org.tio.http.common.*; import org.tio.http.common.handler.HttpRequestHandler; import org.tio.server.intf.ServerAioHandler; import org.tio.utils.hutool.StrUtil; import org.tio.websocket.common.*; import org.tio.websocket.common.util.BASE64Util; import org.tio.websocket.common.util.SHA1Util; import org.tio.websocket.server.handler.IWsMsgHandler; import java.io.UnsupportedEncodingException; import java.nio.ByteBuffer; import java.util.*; /** * websocket 和 http 共存 * * @author tanyaowu * @author L.cm */ public class MqttWebServerAioHandler implements ServerAioHandler { private static Logger log = LoggerFactory.getLogger(org.tio.websocket.server.WsServerAioHandler.class); /** * value: List */ private static final String NOT_FINAL_WEBSOCKET_PACKET_PARTS = "TIO_N_F_W_P_P"; /** * SEC_WEBSOCKET_KEY 后缀 */ private static final String SEC_WEBSOCKET_KEY_SUFFIX = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; private static final byte[] SEC_WEBSOCKET_KEY_SUFFIX_BYTES = SEC_WEBSOCKET_KEY_SUFFIX.getBytes(); /** * websocket子协议 */ private static final String SEC_WEBSOCKET_PROTOCOL = "sec-websocket-protocol"; private static final HeaderName HEADER_NAME_SEC_WEBSOCKET_PROTOCOL = HeaderName.from(SEC_WEBSOCKET_PROTOCOL); private final HttpConfig httpConfig; private final HttpRequestHandler requestHandler; private final IWsMsgHandler wsMsgHandler; public MqttWebServerAioHandler(HttpConfig httpConfig, HttpRequestHandler requestHandler, IWsMsgHandler wsMsgHandler) { this.httpConfig = httpConfig; this.requestHandler = requestHandler; this.wsMsgHandler = wsMsgHandler; } @SuppressWarnings("unchecked") @Override public Packet decode(ByteBuffer buffer, int limit, int position, int readableLength, ChannelContext channelContext) throws TioDecodeException { WsSessionContext wsSessionContext = (WsSessionContext) channelContext.get(); // 尚未握手 if (wsSessionContext == null) { HttpRequest request = HttpRequestDecoder.decode(buffer, limit, position, readableLength, channelContext, httpConfig); if (request == null) { return null; } HttpResponse httpResponse = updateWebSocketProtocol(request); // 普通 http 非 websocket if (httpResponse == null) { return request; } wsSessionContext = new WsSessionContext(); channelContext.set(wsSessionContext); wsSessionContext.setHandshakeRequest(request); wsSessionContext.setHandshakeResponse(httpResponse); WsRequest wsRequestPacket = new WsRequest(); wsRequestPacket.setHandShake(true); return wsRequestPacket; } WsRequest websocketPacket = WsServerDecoder.decode(buffer, channelContext); if (websocketPacket != null) { // 数据包尚未完成 if (!websocketPacket.isWsEof()) { List parts = (List) channelContext.get(NOT_FINAL_WEBSOCKET_PACKET_PARTS); if (parts == null) { parts = new ArrayList<>(); channelContext.set(NOT_FINAL_WEBSOCKET_PACKET_PARTS, parts); } parts.add(websocketPacket); } else { List parts = (List) channelContext.get(NOT_FINAL_WEBSOCKET_PACKET_PARTS); if (parts != null) { channelContext.set(NOT_FINAL_WEBSOCKET_PACKET_PARTS, null); parts.add(websocketPacket); WsRequest first = parts.get(0); websocketPacket.setWsOpcode(first.getWsOpcode()); int allBodyLength = 0; for (WsRequest wsRequest : parts) { allBodyLength += wsRequest.getBody().length; } byte[] allBody = new byte[allBodyLength]; int index = 0; for (WsRequest wsRequest : parts) { System.arraycopy(wsRequest.getBody(), 0, allBody, index, wsRequest.getBody().length); index += wsRequest.getBody().length; } websocketPacket.setBody(allBody); } HttpRequest handshakeRequest = wsSessionContext.getHandshakeRequest(); if (websocketPacket.getWsOpcode() != Opcode.BINARY) { byte[] bodyBs = websocketPacket.getBody(); if (bodyBs != null) { try { String text = new String(bodyBs, handshakeRequest.getCharset()); websocketPacket.setWsBodyText(text); } catch (UnsupportedEncodingException e) { log.error(e.toString(), e); } } } } } return websocketPacket; } @Override public ByteBuffer encode(Packet packet, TioConfig tioConfig, ChannelContext channelContext) { if (packet == null) { return null; } else if (packet instanceof HttpResponse) { try { return HttpResponseEncoder.encode((HttpResponse) packet, tioConfig, channelContext); } catch (UnsupportedEncodingException e) { log.error(e.toString(), e); return null; } } // 处理 websocket 子协议 WsResponse wsResponse; if (packet instanceof WsResponse) { wsResponse = (WsResponse) packet; } else { wsResponse = wsMsgHandler.encodeSubProtocol(packet, tioConfig, channelContext); Objects.requireNonNull(wsResponse, "IWsMsgHandler encodeSubProtocol WsResponse is null."); } // 握手包 if (wsResponse.isHandShake()) { WsSessionContext imSessionContext = (WsSessionContext) channelContext.get(); HttpResponse handshakeResponse = imSessionContext.getHandshakeResponse(); try { return HttpResponseEncoder.encode(handshakeResponse, tioConfig, channelContext); } catch (UnsupportedEncodingException e) { log.error(e.toString(), e); return null; } } return WsServerEncoder.encode(wsResponse, tioConfig, channelContext); } private WsResponse handlerWs(WsRequest websocketPacket, byte[] bytes, Opcode opcode, ChannelContext channelContext) throws Exception { if (opcode == Opcode.TEXT) { if (bytes == null || bytes.length == 0) { Tio.remove(channelContext, "错误的websocket包，body为空"); return null; } String text = new String(bytes, httpConfig.getCharset()); Object retObj = wsMsgHandler.onText(websocketPacket, text, channelContext); String methodName = "onText"; return processRetObj(retObj, methodName, channelContext); } else if (opcode == Opcode.BINARY) { if (bytes == null || bytes.length == 0) { Tio.remove(channelContext, "错误的websocket包，body为空"); return null; } Object retObj = wsMsgHandler.onBytes(websocketPacket, bytes, channelContext); String methodName = "onBytes"; return processRetObj(retObj, methodName, channelContext); } else if (opcode == Opcode.PING || opcode == Opcode.PONG) { log.debug("收到{}", opcode); return null; } else if (opcode == Opcode.CLOSE) { Object retObj = wsMsgHandler.onClose(websocketPacket, bytes, channelContext); String methodName = "onClose"; return processRetObj(retObj, methodName, channelContext); } else { Tio.remove(channelContext, "错误的websocket包，错误的Opcode"); return null; } } @Override public void handler(Packet packet, ChannelContext channelContext) throws Exception { if (packet instanceof HttpRequest) { HttpRequest request = (HttpRequest) packet; String ip = request.getClientIp(); if (channelContext.tioConfig.ipBlacklist.isInBlacklist(ip)) { HttpResponse httpResponse = request.httpConfig.getRespForBlackIp(); if (httpResponse != null) { Tio.send(channelContext, httpResponse); } else { Tio.remove(channelContext, ip + "在黑名单中"); } return; } HttpResponse httpResponse = requestHandler.handler(request); if (httpResponse != null) { Tio.send(channelContext, httpResponse); } else { if (log.isInfoEnabled()) { log.info("{}, {}, handler return null, request line: {}", channelContext.tioConfig.getName(), channelContext.toString(), request.getRequestLine().toString()); } request.close("handler return null"); } return; } WsRequest wsRequest = (WsRequest) packet; // 判断握手包 if (wsRequest.isHandShake()) { WsSessionContext wsSessionContext = (WsSessionContext) channelContext.get(); HttpRequest request = wsSessionContext.getHandshakeRequest(); HttpResponse httpResponse = wsSessionContext.getHandshakeResponse(); HttpResponse response = wsMsgHandler.handshake(request, httpResponse, channelContext); if (response == null) { Tio.remove(channelContext, "业务层不同意握手"); return; } wsSessionContext.setHandshakeResponse(response); WsResponse wsResponse = new WsResponse(); wsResponse.setHandShake(true); Tio.send(channelContext, wsResponse); wsSessionContext.setHandshaked(true); wsMsgHandler.onAfterHandshaked(request, httpResponse, channelContext); return; } if (!wsRequest.isWsEof()) { return; } WsResponse wsResponse = handlerWs(wsRequest, wsRequest.getBody(), wsRequest.getWsOpcode(), channelContext); if (wsResponse != null) { Tio.send(channelContext, wsResponse); } } private WsResponse processRetObj(Object obj, String methodName, ChannelContext channelContext) { if (obj == null) { return null; } else { if (obj instanceof String) { return WsResponse.fromText((String) obj, httpConfig.getCharset()); } else if (obj instanceof byte[]) { return WsResponse.fromBytes((byte[]) obj); } else if (obj instanceof WsResponse) { return (WsResponse) obj; } else if (obj instanceof ByteBuffer) { return WsResponse.fromBytes(((ByteBuffer) obj).array()); } else { log.error("{} {}.{}()方法，只允许返回byte[]、ByteBuffer、WsResponse或null，但是程序返回了{}", channelContext, this.getClass().getName(), methodName, obj.getClass().getName()); return null; } } } /** * 本方法改编自baseio: https://gitee.com/generallycloud/baseio
* 感谢开源作者的付出 * * @param request HttpRequest * @return HttpResponse * @author tanyaowu */ public HttpResponse updateWebSocketProtocol(HttpRequest request) { Map headers = request.getHeaders(); String secWebSocketKey = headers.get(HttpConst.RequestHeaderKey.Sec_WebSocket_Key); if (StrUtil.isNotBlank(secWebSocketKey)) { byte[] secWebSocketKeyBytes; try { secWebSocketKeyBytes = secWebSocketKey.getBytes(request.getCharset()); } catch (UnsupportedEncodingException e) { throw new RuntimeException(e); } byte[] allBs = new byte[secWebSocketKeyBytes.length + SEC_WEBSOCKET_KEY_SUFFIX_BYTES.length]; System.arraycopy(secWebSocketKeyBytes, 0, allBs, 0, secWebSocketKeyBytes.length); System.arraycopy(SEC_WEBSOCKET_KEY_SUFFIX_BYTES, 0, allBs, secWebSocketKeyBytes.length, SEC_WEBSOCKET_KEY_SUFFIX_BYTES.length); byte[] keyArray = SHA1Util.SHA1(allBs); String acceptKey = BASE64Util.byteArrayToBase64(keyArray); HttpResponse httpResponse = new HttpResponse(request); // 101 协议转换 httpResponse.setStatus(HttpResponseStatus.C101); Map respHeaders = new HashMap<>(); respHeaders.put(HeaderName.Connection, HeaderValue.Connection.Upgrade); respHeaders.put(HeaderName.Upgrade, HeaderValue.Upgrade.WebSocket); respHeaders.put(HeaderName.Sec_WebSocket_Accept, HeaderValue.from(acceptKey)); // websocket 子协议协商 String[] supportedSubProtocols = wsMsgHandler.getSupportedSubProtocols(); if (supportedSubProtocols != null && supportedSubProtocols.length > 0) { String requestedSubProtocols = headers.get(SEC_WEBSOCKET_PROTOCOL); String selectSubProtocol = selectSubProtocol(requestedSubProtocols, supportedSubProtocols); if (selectSubProtocol != null) { respHeaders.put(HEADER_NAME_SEC_WEBSOCKET_PROTOCOL, HeaderValue.from(selectSubProtocol)); } } httpResponse.addHeaders(respHeaders); return httpResponse; } return null; } /** * Selects the first matching supported sub protocol * * @param requestedSubProtocols 请求中的子协议 * @param subProtocols 系统支持得子协议，注意：不支持 * 通配 * @return First matching supported sub protocol. Null if not found. */ private static String selectSubProtocol(String requestedSubProtocols, String[] subProtocols) { if (requestedSubProtocols == null || subProtocols == null || subProtocols.length == 0) { return null; } String[] requestedSubProtocolArray = requestedSubProtocols.split(","); for (String p : requestedSubProtocolArray) { String requestedSubProtocol = p.trim(); for (String supportedSubProtocol : subProtocols) { if (requestedSubProtocol.equals(supportedSubProtocol)) { return requestedSubProtocol; } } } // No match found return null; } }