Merge commit '09987d0f9d32e860f1391bb9c75b799501e2d141' as 'Subtrees/websocket'

Subtrees/websocket/examples/chat_client/chat_client_handler.cpp

@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 2011, Peter Thorson. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the WebSocket++ Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+
+#include "chat_client_handler.hpp"
+
+#include <boost/algorithm/string/replace.hpp>
+
+using websocketchat::chat_client_handler;
+using websocketpp::client;
+
+void chat_client_handler::on_fail(connection_ptr con) {
+    std::cout << "Connection failed" << std::endl;
+}
+
+void chat_client_handler::on_open(connection_ptr con) {
+    m_con = con;
+
+    std::cout << "Successfully connected" << std::endl;
+}
+
+void chat_client_handler::on_close(connection_ptr con) {
+    m_con = connection_ptr();
+
+    std::cout << "client was disconnected" << std::endl;
+}
+
+void chat_client_handler::on_message(connection_ptr con,message_ptr msg) {
+    decode_server_msg(msg->get_payload());
+}
+
+// CLIENT API
+// client api methods will be called from outside the io_service.run thread
+//  they need to be careful to not touch unsyncronized member variables.
+
+void chat_client_handler::send(const std::string &msg) {
+    if (!m_con) {
+        std::cerr << "Error: no connected session" << std::endl;
+        return;
+    }
+    
+    if (msg == "/list") {
+        std::cout << "list all participants" << std::endl;
+    } else if (msg == "/close") {
+        close();
+    } else {
+        m_con->send(msg);
+    }
+}
+
+void chat_client_handler::close() {
+    if (!m_con) {
+        std::cerr << "Error: no connected session" << std::endl;
+        return;
+    }
+    m_con->close(websocketpp::close::status::GOING_AWAY,"");
+}
+
+// END CLIENT API
+
+
+// {"type":"participants","value":[<participant>,...]}
+// {"type":"msg","sender":"<sender>","value":"<msg>" }
+void chat_client_handler::decode_server_msg(const std::string &msg) {
+    // for messages of type participants, erase and rebuild m_participants
+    // for messages of type msg, print out message
+    
+    // NOTE: The chat server was written with the intention of the client having a built in
+    // JSON parser. To keep external dependencies low for this demonstration chat client I am
+    // parsing the server messages by hand.
+    
+    std::string::size_type start = 9;
+    std::string::size_type end;
+    
+    if (msg.substr(0,start) != "{\"type\":\"") {
+        // ignore
+        std::cout << "invalid message" << std::endl;
+        return;
+    }
+    
+    
+
+    if (msg.substr(start,15) == "msg\",\"sender\":\"") {
+        // parse message
+        std::string sender;
+        std::string message;
+        
+        start += 15;
+
+        end = msg.find("\"",start);
+        while (end != std::string::npos) {
+            if (msg[end-1] == '\\') {
+                sender += msg.substr(start,end-start-1) + "\"";
+                start = end+1;
+                end = msg.find("\"",start);
+            } else {
+                sender += msg.substr(start,end-start);
+                start = end;
+                break;
+            }
+        }
+        
+        if (msg.substr(start,11) != "\",\"value\":\"") {
+            std::cout << "invalid message" << std::endl;
+            return;
+        }
+
+        start += 11;
+
+        end = msg.find("\"",start);
+        while (end != std::string::npos) {
+            if (msg[end-1] == '\\') {
+                message += msg.substr(start,end-start-1) + "\"";
+                start = end+1;
+                end = msg.find("\"",start);
+            } else {
+                message += msg.substr(start,end-start);
+                start = end;
+                break;
+            }
+        }
+
+        std::cout << "[" << sender << "] " << message << std::endl;
+    } else if (msg.substr(start,23) == "participants\",\"value\":[") {
+        // parse participants
+        std::cout << "participants message" << std::endl;
+    } else {
+        // unknown message type
+        std::cout << "unknown message" << std::endl;
+    }
+}