Add libhv and test http client

vendor/libhv/include/hv/WebSocketServer.h

@@ -0,0 +1,46 @@
+#ifndef HV_WEBSOCKET_SERVER_H_
+#define HV_WEBSOCKET_SERVER_H_
+
+/*
+ * @demo examples/websocket_server_test.cpp
+ */
+
+#include "HttpServer.h"
+#include "WebSocketChannel.h"
+
+#define websocket_server_t      http_server_t
+#define websocket_server_run    http_server_run
+#define websocket_server_stop   http_server_stop
+
+namespace hv {
+
+struct WebSocketService {
+    std::function<void(const WebSocketChannelPtr&, const HttpRequestPtr&)>  onopen;
+    std::function<void(const WebSocketChannelPtr&, const std::string&)>     onmessage;
+    std::function<void(const WebSocketChannelPtr&)>                         onclose;
+    int ping_interval;
+
+    WebSocketService() : ping_interval(0) {}
+
+    void setPingInterval(int ms) {
+        ping_interval = ms;
+    }
+};
+
+class WebSocketServer : public HttpServer {
+public:
+    WebSocketServer(WebSocketService* service = NULL)
+        : HttpServer()
+    {
+        this->ws = service;
+    }
+    ~WebSocketServer() { stop(); }
+
+    void registerWebSocketService(WebSocketService* service) {
+        this->ws = service;
+    }
+};
+
+}
+
+#endif // HV_WEBSOCKET_SERVER_H_