start work for socket.IO

basic Engine.IO implementation

src/SocketIOclient.h

@@ -0,0 +1,58 @@
+/*
+ * SocketIOclient.h
+ *
+ *  Created on: May 12, 2018
+ *      Author: links
+ */
+
+#ifndef SOCKETIOCLIENT_H_
+#define SOCKETIOCLIENT_H_
+
+#include "WebSockets.h"
+
+#define EIO_HEARTBEAT_INTERVAL 10000
+
+typedef enum {
+    eIOtype_OPEN = '0', ///< Sent from the server when a new transport is opened (recheck)
+    eIOtype_CLOSE = '1', ///< Request the close of this transport but does not shutdown the connection itself.
+    eIOtype_PING = '2', ///< Sent by the client. Server should answer with a pong packet containing the same data
+    eIOtype_PONG = '3', ///< Sent by the server to respond to ping packets.
+    eIOtype_MESSAGE = '4', ///< actual message, client and server should call their callbacks with the data
+    eIOtype_UPGRADE = '5', ///< Before engine.io switches a transport, it tests, if server and client can communicate over this transport. If this test succeed, the client sends an upgrade packets which requests the server to flush its cache on the old transport and switch to the new transport.
+    eIOtype_NOOP = '6', ///< A noop packet. Used primarily to force a poll cycle when an incoming websocket connection is received.
+} engineIOmessageType_t;
+
+
+typedef enum {
+    sIOtype_CONNECT = '0',
+    sIOtype_DISCONNECT = '1',
+    sIOtype_EVENT = '2',
+    sIOtype_ACK = '3',
+    sIOtype_ERROR = '4',
+    sIOtype_BINARY_EVENT = '5',
+    sIOtype_BINARY_ACK = '6',
+} socketIOmessageType_t;
+
+class SocketIOclient: private WebSocketsClient {
+
+    public:
+#ifdef __AVR__
+        typedef void (*SocketIOclientEvent)(WStype_t type, uint8_t * payload, size_t length);
+#else
+        typedef std::function<void (WStype_t type, uint8_t * payload, size_t length)> SocketIOclientEvent;
+#endif
+
+        SocketIOclient(void);
+        virtual ~SocketIOclient(void);
+
+        void begin(const char *host, uint16_t port, const char * url = "/socket.io/?EIO=3", const char * protocol = "arduino");
+        void begin(String host, uint16_t port, String url = "/socket.io/?EIO=3", String protocol = "arduino");
+
+
+        void loop(void);
+    private:
+        void runCbEvent(WStype_t type, uint8_t * payload, size_t length);
+        uint64_t _lastHeartbeat = 0;
+};
+
+#endif /* SOCKETIOCLIENT_H_ */