转自：http://www.miidoo.cn/info_detail-228.html

// 采用CURLOPT_WRITEFUNCTION 实现网页下载保存功能

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <curl/curl.h>
#include <curl/types.h>
#include <curl/easy.h>
 
FILE *fp;  //定义FILE类型指针

//这个函数是为了符合CURLOPT_WRITEFUNCTION而构造的

//完成数据保存功能
size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream)
{
    int written = fwrite(ptr, size, nmemb, (FILE *)fp);
    return written;
}

int main(int argc, char *argv[])
{
    CURL *curl;
   
    curl_global_init(CURL_GLOBAL_ALL);
    curl=curl_easy_init();
    curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
    if((fp=fopen(argv[2],"w"))==NULL)
    {
        curl_easy_cleanup(curl);
        exit(1);
    }
////CURLOPT_WRITEFUNCTION 将后继的动作交给write_data函数处理
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
    curl_easy_perform(curl);
    curl_easy_cleanup(curl);
    exit(0);
}

 


编译gcc  get_http.c  -o get_http –lcurl

./ get_http www.baidu.com