window下使用curl库下载文件

1 下载curl库：​​http://curl.haxx.se/download.html​​

2 下载后解压，进入curl-7.38.0\projects\Windows\VC6目录，使用vs 2010打开项目，选择DLL Release编译

3 新建curl测试项目，创建文件夹include和lib

3 进入目录curl-7.38.0\build\Win32\VC6\DLL Release将libcurl.dll和libcurl.lib分别拷贝到curl项目的include和lib目录下

4 curl测试项目属性—- C/C++ --- 预处理器– 预处理器定义  添加 CURL_STATICLIB

5 curl测试项目属性—- C/C++--- 常规–附加包含目录  添加include

6 curl测试项目属性—- 连接器 --- 常规 – 附加库目录 添加lib

7 将curl-7.38.0\include\下的curl目录拷贝到curl测试项目的include目录下

8 测试程序编写

#include <stdio.h>
#include <iostream>
#include <Windows.h>  
#include "curl/curl.h"  

#pragma comment(lib, "libcurl.lib")   
#pragma comment(lib, "wldap32.lib")   
#pragma comment(lib, "ws2_32.lib")   
#pragma comment(lib, "winmm.lib")   

using namespace std;

size_t write_data(char *buffer,size_t size, size_t nitems,void *outstream)
{
    int written = fwrite(buffer, size, nitems, (FILE*)outstream);
    return written;
}

int main(int argc,char* argv[])
{
    // 将note.xml写入myxml.xml文件里
    CURL *pCurl;  
    FILE* pFile = fopen( "myxml.xml", "wb" );
    pCurl = curl_easy_init();  
    curl_easy_setopt(pCurl, CURLOPT_WRITEDATA, (void*)pFile);
    curl_easy_setopt(pCurl, CURLOPT_WRITEFUNCTION, write_data);
    curl_easy_setopt(pCurl, CURLOPT_URL, "http://www.w3school.com.cn/example/xmle/note.xml");
    curl_easy_perform(pCurl);
    fclose(pFile);
    curl_easy_cleanup( pCurl );
    
    //将note.xml显示在终端上
    CURL *curl;  
    CURLcode res;  
    curl = curl_easy_init();  
    if(curl)
    {
        curl_easy_setopt(curl, CURLOPT_URL, "http://www.w3school.com.cn/example/xmle/note.xml");  
 
        res = curl_easy_perform(curl);  
        curl_easy_cleanup(curl);  
        curl_global_init(CURL_GLOBAL_ALL);  
    }
    system("pause");
}      

9 运行结果