//引入函數庫頭文件
#include <curl/curl.h>
#include <string.h>
//用#pragma comment預編譯命令，表示這個程序將使用ibcurld_imp.lib這個庫文件
#pragma comment(lib,"libcurld_imp.lib")
//復制將數據寫入文件的回調函數
size_t write_data(void *ptr, size_t size,size_t nmemb,FILE *stream) {
int written=fwrite(ptr,size,nmemb,stream);
return written;
}
//使用函數庫提供函數實現的文件下載函數
CURLcode download( char* url,
char* out)
{
CURL *curl = NULL;
FILE *fp = NULL;
CURLcode res;
//調用函數庫中的curl_easy _init()函數完成初始化
curl = curl_easy_init();
if (curl)
{
fp=fopen(out,"wb");
curl_easy_setopt(curl,CURLOPT_URL, url);
curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION, write_data);
curl_easy_setopt(curl,CURLOPT_WRITEDATA, fp);
res=curl_easy_perform(curl);
curl_easy_cleanup(curl);
//下載完成，進行最后的清理工作
fclose(fp);
return res;
}
else
{
return CURLE_FAILED_INIT;
}
}
//輔助函數，用于獲取文件名
void getfilename(char* url, char* name)
{
char* pos = strrchr(url,"/");
if (NULL!=pos)
{
strcpy(name,pos+1);
}
}
int main(int argc,char* argv[])
{
if (2!=argc)
{
puts("usage:get http://www.zg4o1577.cn/f/keil3.rar");
return -1;
}
char* url = argv[1];
char name[32];
getfilename(url,name);
CURLcode res = download(url,name);
if(CURLE_OK==res)
{
printf("great! download %s as %s succerfully.",url,name);
}
else
{
printf("sorry:cannot download %s.",url);
}
return 0;
}