cocos2d-x网络编程二（WebSocket）

TestWebSocketScene.h文件：

#ifndef __TestWebSocketScene_SCENE_H__
#define __TestWebSocketScene_SCENE_H__
#include "cocos2d.h"
#include "network\WebSocket.h"
USING_NS_Cc;
using namespace cocos2d::network;

//继承WebSocket::Delegate，实现四个虚拟方法
class TestWebSocket : public cocos2d::Layer,WebSocket::Delegate
{
    public:
        // there's no 'id' in cpp,so we recommend returning the class instance pointer
        static cocos2d::Scene* createScene();
        // Here's a difference. Method 'init' in cocos2d-x returns bool,instead of returning 'id' in cocos2d-iphone
        virtual bool init();

        //连接时调用
        virtual void onOpen(WebSocket *ws);
        //接收数据时调用
        virtual void onmessage(WebSocket *ws,const WebSocket::Data &data);
        //关闭连接时调用
        virtual void onClose(WebSocket *ws);
        //发送数据但没有建立连接，或是受到断开连接的信号时调用。
        virtual void onError(WebSocket *ws,const WebSocket::ErrorCode& error);

        // implement the "static create()" method manually
        CREATE_FUNC(TestWebSocket);
    private:
        WebSocket *wsText;
};

#endif // __TestWebSocketScene_SCENE_H__

TestWebSocketScene.cpp文件：

#include "TestWebSocketScene.h"


Scene* TestWebSocket::createScene()
{
    // 'scene' is an autorelease object
    auto scene = Scene::create();

    // 'layer' is an autorelease object
    auto layer = TestWebSocket::create();

    // add layer as a child to scene
    scene->addChild(layer);

    // return the scene
    return scene;
}

// on "init" you need to initialize your instance
bool TestWebSocket::init()
{
    //////////////////////////////
    // 1. super init first
    if ( !Layer::init() )
    {
        return false;
    }

    Size size = Director::geTinstance()->getWinSize();
    wsText = nullptr;//初始化为空指针

    auto menu = Menu::create();
    menu->setPosition(Vec2::ZERO);
    addChild(menu);


    //1.初始化websocket
    auto lblSendText = Label::create("init websocket text","Arial",22);
    auto menuSendText = MenuItemLabel::create(lblSendText,[=](Ref *sender){
        wsText = new WebSocket();
        //初始化请求地址
        if( !wsText->init(*this,"ws://echo.websocket.org")){
            CC_SAFE_deletE(wsText);//初始化失败：delete掉该对象，置空。
        };
    });
    menuSendText->setPosition(size/2);
    menu->addChild(menuSendText);


    //2.发送text数据
    auto lblSend = Label::create("sent text",22);
    auto menuSend = MenuItemLabel::create(lblSend,[=](Ref *sender){
        if (wsText!=nullptr)
        {
            wsText->send("Hello websocket.");
        }
    });
    menuSend->setPosition(size.width/2,size.height/2-50);
    menu->addChild(menuSend);


    //3.发送Binary数据
    auto lblSendBinary = Label::create("sent Binary",22);
    auto menuSendBinary = MenuItemLabel::create(lblSendBinary,[=](Ref *sender){
        if (wsText!=nullptr)
        {
            char buffer[] = "Hello \0 binary";
            wsText->send((unsigned char *)buffer,sizeof(buffer));//需要的是 unsigned char*要强制类型转换
        }
    });
    menuSendBinary->setPosition(size.width/2,size.height/2-100);
    menu->addChild(menuSendBinary);




    return true;
}

void TestWebSocket::onOpen(WebSocket *ws){
    log("webSocket (%p) open",ws);
    if (ws==wsText)
    {
        log("WebSocket send Text open");
    }

}

void TestWebSocket::onmessage(WebSocket *ws,const WebSocket::Data &data){
    log("webSocket (%p) receive message",ws);
    if (!data.isBinary)
    {//文本数据
        log("received message is :%s",data.bytes);
    }else//二进制数据的处理
    {
        std::String result;
        for (int i = 0; i < data.len; i++)
        {
            if (data.bytes[i]!='\0')//不等于0
            {
                result +=data.bytes[i];
            }else
            {
                result += "\'\\0\'";//转义字符 \' --> ' \\ --> \ 结果'\0'
            }
        }
        log("received binary data is: %s",result.c_str());
    }
}

void TestWebSocket::onClose(WebSocket *ws){
    log("webSocket (%p) close",ws);
    if (ws==wsText)
    {
        log("WebSocket send Text close");
    }
}

void TestWebSocket::onError(WebSocket *ws,const WebSocket::ErrorCode &error){
    log("WebSocket (%p) error",ws);
    if (ws==wsText)
    {
        log("WebSocket send Text error");
    }
}

知识点： 返回的数据使用WebSocket::Data封装，它是cocos2d定义的一个结构体 struct Data { Data():bytes(nullptr),len(0),issued(0),isBinary(false){} char* bytes; //存放的数据 ssize_t len,issued;//数据的长度 bool isBinary; //标识文本时文本数据还是二进制数据 };