(原创) cocos2dx使用Curl连接网络(客户端)

0. 环境:

winxpsp3, vs2010, cocos2dx@2.1.4

1. 新建一个Helloworld工程

2. HelloworldScene.h里面重写virtual bool ccTouchBegan( cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent );

3. .cpp看代码:

　　关注点在write_callback() 和 ccTouchBegan()的重写　　

4. c盘创建个空文件C:\baidu.html

5. 实现的功能就是点一下屏幕发出一次http get request, 然后在指定的文件里面填充上服务器返回的网页.

#include "HelloWorldScene.h"
#include "cocos-ext.h"
#include "curlcurl.h"
#include <string>


using namespace std;

USING_NS_CC;
USING_NS_CC_EXT;



////////////////////////////////////
CCScene* HelloWorld::scene()
{
    // 'scene' is an autorelease object
    CCScene *scene = CCScene::create();
    
    // 'layer' is an autorelease object
    HelloWorld *layer = HelloWorld::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 HelloWorld::init()  
{  
    if ( !CCLayer::init() )  
    {  
        return false;  
    }  

    pLabel = CCLabelTTF::create("Hello World", "airal", 34);  
    CCSize size = CCDirector::sharedDirector()->getWinSize();  
    pLabel->setPosition( ccp(size.width / 2, size.height - 20) );  
    this->addChild(pLabel, 1);  
   
   
    setTouchMode(kCCTouchesOneByOne);
    setTouchEnabled(true);
    return true;  
} 


void HelloWorld::menuCloseCallback(CCObject* pSender)
{
    CCDirector::sharedDirector()->end();

#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
    exit(0);
#endif
}

size_t write_callback(void *ptr, size_t size, size_t nmemb, FILE *stream)  
{  
    size_t written = fwrite(ptr, size, nmemb, (FILE *)stream);  
    return written;  
}  

bool HelloWorld::ccTouchBegan( CCTouch *pTouch, CCEvent *pEvent )
{
    CCLog("go into ccTouchBegan");
    CURL *curl;
    CURLcode res;
    char buffer[10];

    curl = curl_easy_init();
    if (curl) 
    {
        FILE *outfile;  
        outfile = fopen("C:\baidu.html", "wb");

        //curl_easy_setopt(curl, CURLOPT_URL, "blog.csdn.net");
        curl_easy_setopt(curl, CURLOPT_URL, "http://127.0.0.1:8080/wuziqi?name=1715");

        if(outfile)  
        {  
            //指定写入的文件指针。  
            curl_easy_setopt(curl, CURLOPT_FILE, outfile);  
        }  

        //设置写数据的回调函数。  
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);  

        res = curl_easy_perform(curl);
        /* always cleanup */
        curl_easy_cleanup(curl);

        fclose(outfile);  

        if (res == 0)
        {
            pLabel->setString("0 response");
        }
        else
        {
            sprintf(buffer,"code: %i",res);
            pLabel->setString(buffer);
        }
    } 
    else 
    {
        pLabel->setString("no curl");
    } 


    ///////////////////////////////////////////////////////////


    return true;
}

/*size_t HelloWorld::funcCallback( void* ptr,size_t size,size_t number,void *stream )
{
    CCString* a = CCString::createWithFormat("%s",ptr);  
    this->pLabel->setString(a->getCString());  
    CCLog(a->getCString());
    CCLog("go into writehtml");
    return size*number;//这里一定要返回实际返回的字节数    
}*/