Add libhv and test http client

vendor/libhv/include/hv/WebSocketClient.h

@@ -0,0 +1,71 @@
+#ifndef HV_WEBSOCKET_CLIENT_H_
+#define HV_WEBSOCKET_CLIENT_H_
+
+/*
+ * @demo examples/websocket_client_test.cpp
+ */
+
+#include "hexport.h"
+
+#include "TcpClient.h"
+#include "WebSocketChannel.h"
+
+#include "HttpParser.h"
+#include "WebSocketParser.h"
+
+namespace hv {
+
+class HV_EXPORT WebSocketClient : public TcpClientTmpl<WebSocketChannel> {
+public:
+    std::string           url;
+    std::function<void()> onopen;
+    std::function<void()> onclose;
+    std::function<void(const std::string& msg)> onmessage;
+    // PATCH: onmessage not given opcode
+    enum ws_opcode opcode() { return channel ? channel->opcode : WS_OPCODE_CLOSE; }
+
+    WebSocketClient(EventLoopPtr loop = NULL);
+    virtual ~WebSocketClient();
+
+    // url = ws://ip:port/path
+    // url = wss://ip:port/path
+    int open(const char* url, const http_headers& headers = DefaultHeaders);
+    int close();
+    int send(const std::string& msg);
+    int send(const char* buf, int len, enum ws_opcode opcode = WS_OPCODE_BINARY);
+
+    // setConnectTimeout / setPingInterval / setReconnect
+    void setPingInterval(int ms) {
+        ping_interval = ms;
+    }
+
+    // NOTE: call before open
+    void setHttpRequest(const HttpRequestPtr& req) {
+        http_req_ = req;
+    }
+
+    // NOTE: call when onopen
+    const HttpResponsePtr& getHttpResponse() {
+        return http_resp_;
+    }
+
+private:
+    enum State {
+        CONNECTING,
+        CONNECTED,
+        WS_UPGRADING,
+        WS_OPENED,
+        WS_CLOSED,
+    } state;
+    HttpParserPtr       http_parser_;
+    HttpRequestPtr      http_req_;
+    HttpResponsePtr     http_resp_;
+    WebSocketParserPtr  ws_parser_;
+    // ping/pong
+    int                 ping_interval;
+    int                 ping_cnt;
+};
+
+}
+
+#endif // HV_WEBSOCKET_CLIENT_H_