COCOS2D-X之使用CURL下载图片的一个简单Demo

#include"curl/curl.h"
#pragma  comment(lib,"libcurl_imp.lib")
bool HelloWorld::init()
{
 CCLayer::init();  
 CURL *pCurl;
 CURLcode nResCode;
 pCurl = curl_easy_init();//初始化CURL取得初始化成功后的CURL指针
 if (pCurl != NULL) 
 {
  FILE *pFile;
  pFile = fopen("XXX.jpg", "wb");
  curl_easy_setopt(pCurl,CURLOPT_URL,"http://ww1.sinaimg.cn/large/7f32a2c8jw1e8lyw03zpbj20c8d1ynpd.jpg");
  if(pFile != NULL)
   curl_easy_setopt(pCurl,CURLOPT_FILE,pFile);                   //指定写入的文件指针
  curl_easy_setopt(pCurl, CURLOPT_WRITEFUNCTION, pWriteCallback);//设置写数据的回调函数
  curl_easy_setopt(pCurl, CURLOPT_VERBOSE, TRUE);                //让CURL报告每一件意外的事情
  curl_easy_setopt(pCurl, CURLOPT_TIMEOUT, 60);                  //设置超时时间
  curl_easy_setopt(pCurl, CURLOPT_NOPROGRESS,0L);
  curl_easy_setopt(pCurl, CURLOPT_PROGRESSFUNCTION, HelloWorld::DownProgresss);//指定显示进度的回调函数
  nResCode = curl_easy_perform(pCurl);//执行上面设定的动作并返回状态码
  curl_easy_cleanup(pCurl);           //释放相关资源
  fclose(pFile);
   nResCode == CURLE_OK ? CCLOG("DownLoad Success") : CCLOG("CODE: %d",nResCode);
 }
 return true;
}
size_t HelloWorld::pWriteCallback(void *pData, size_t n, size_t nDataSize, FILE *stream)  
{  
 size_t nWritten = fwrite(pData,n,nDataSize,(FILE *)stream);  
 return nWritten;  
}
int HelloWorld::DownProgresss(void* clientp,double fDownLoadTotal,double fDownLoaded,double fUpTotal,double fUpLoaded)
{
 if (fDownLoaded >= 0 && fDownLoadTotal != 0)
  CCLOG("%6.2f%%\n", 100*fDownLoaded/fDownLoadTotal);//下载百分比
 return 0;
}

COCOS2D-X之使用CURL下载图片的一个简单Demo

原文：http://blog.csdn.net/yirancpp/article/details/19123815