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examples/chat_server/chat.hpp

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+#ifndef CHAT_HPP
+#define CHAT_HPP
+
+// com.zaphoyd.websocketpp.chat protocol
+// 
+// client messages:
+// msg [UTF8 text]
+// 
+// server messages:
+// {"type":"msg","sender":"<sender>","value":"<msg>" }
+// {"type":"participants","value":[<participant>,...]}
+
+#include <boost/shared_ptr.hpp>
+
+#include <websocketpp/websocket_connection_handler.hpp>
+
+#include <set>
+#include <map>
+#include <string>
+#include <vector>
+
+namespace websocketchat {
+
+class chat_handler : public websocketpp::connection_handler {
+public:
+	chat_handler() {}
+	virtual ~chat_handler() {}
+	
+	bool validate(websocketpp::session_ptr client); 
+	
+	// add new connection to the lobby
+	void connect(session_ptr client) {
+		std::cout << "client " << client << " joined the lobby." << std::endl;
+		m_connections.insert(client);
+
+		// send user list to all clients
+		// send signon message from server to all other clients.
+
+	}
+		
+	// someone disconnected from the lobby, remove them
+	void disconnect(websocketpp::session_ptr client,const std::string &reason) {
+		std::set<session_ptr>::iterator it = m_connections.find(client);
+		
+		if (it == m_connections.end()) {
+			// this client has already disconnected, we can ignore this.
+			// this happens during certain types of disconnect where there is a
+			// deliberate "soft" disconnection preceeding the "hard" socket read
+			// fail or disconnect ack message.
+			return;
+		}
+		
+		std::cout << "client " << client << " left the lobby." << std::endl;
+		
+		m_connections.erase(it);
+
+		// send signoff message from server to all clients
+		// send user list to all remaining clients
+	}
+	
+	void message(websocketpp::session_ptr client,const std::string &msg) {
+		std::cout << "message from client " << client << ": " << msg << std::endl;
+		
+		// create JSON message to send based on msg
+
+		for (std::set<session_ptr>::iterator it = m_connections.begin();
+												it != m_connections.end(); it++) {
+			(*it)->send(msg);
+		}
+	}
+	
+	// lobby will ignore binary messages
+	void message(websocketpp::session_ptr client,
+		const std::vector<unsigned char> &data) {}
+private:
+	std::string serialize_state();
+
+	// list of outstanding connections
+	std::set<session_ptr> m_connections;
+};
+
+typedef boost::shared_ptr<chat_handler> chat_handler_ptr;
+
+}
+#endif // CHAT_HPP