add new broadcast server example

examples/broadcast_server/.gitignore

@@ -0,0 +1,9 @@
+CMakeCache.txt
+package-lock.json
+CMakeFiles		
+ixwebsocket_unittest	
+cmake_install.cmake	
+node_modules
+ixwebsocket
+Makefile
+build

examples/broadcast_server/CMakeLists.txt

@@ -0,0 +1,30 @@
+#
+# Author: Benjamin Sergeant
+# Copyright (c) 2018 Machine Zone, Inc. All rights reserved.
+#
+
+cmake_minimum_required (VERSION 3.4.1)
+project (broadcast_server)
+
+# There's -Weverything too for clang
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic -Wshorten-64-to-32")
+
+set (OPENSSL_PREFIX /usr/local/opt/openssl) # Homebrew openssl
+
+set (CMAKE_CXX_STANDARD 11)
+
+option(USE_TLS "Add TLS support" ON)
+
+add_subdirectory(${PROJECT_SOURCE_DIR}/../.. ixwebsocket)
+
+include_directories(broadcast_server .)
+
+add_executable(broadcast_server 
+  broadcast_server.cpp)
+
+if (APPLE AND USE_TLS)
+    target_link_libraries(broadcast_server "-framework foundation" "-framework security")
+endif()
+
+target_link_libraries(broadcast_server ixwebsocket)
+install(TARGETS broadcast_server DESTINATION bin)

examples/broadcast_server/broadcast_server.cpp

@@ -0,0 +1,73 @@
+/*
+ *  broadcast_server.cpp
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2018 Machine Zone, Inc. All rights reserved.
+ */
+
+#include <iostream>
+#include <sstream>
+#include <ixwebsocket/IXWebSocketServer.h>
+
+int main(int argc, char** argv)
+{
+    int port = 8080;
+    if (argc == 2)
+    {
+        std::stringstream ss;
+        ss << argv[1];
+        ss >> port;
+    }
+
+    ix::WebSocketServer server(port);
+
+    server.setOnConnectionCallback(
+        [&server](std::shared_ptr<ix::WebSocket> webSocket)
+        {
+            webSocket->setOnMessageCallback(
+                [webSocket, &server](ix::WebSocketMessageType messageType,
+                   const std::string& str,
+                   size_t wireSize,
+                   const ix::WebSocketErrorInfo& error,
+                   const ix::WebSocketCloseInfo& closeInfo,
+                   const ix::WebSocketHttpHeaders& headers)
+                {
+                    if (messageType == ix::WebSocket_MessageType_Open)
+                    {
+                        std::cerr << "New connection" << std::endl;
+                        std::cerr << "Headers:" << std::endl;
+                        for (auto it : headers)
+                        {
+                            std::cerr << it.first << ": " << it.second << std::endl;
+                        }
+                    }
+                    else if (messageType == ix::WebSocket_MessageType_Close)
+                    {
+                        std::cerr << "Closed connection" << std::endl;
+                    }
+                    else if (messageType == ix::WebSocket_MessageType_Message)
+                    {
+                        for (auto&& client : server.getClients())
+                        {
+                            if (client != webSocket)
+                            {
+                                client->send(str);
+                            }
+                        }
+                    }
+                }
+            );
+        }
+    );
+
+    auto res = server.listen();
+    if (!res.first)
+    {
+        std::cerr << res.second << std::endl;
+        return 1;
+    }
+
+    server.start();
+    server.wait();
+
+    return 0;
+}