resolve short url

short_url_resolve.c

#include <stdio.h>
#include <curl/curl.h>

int main(void)
{
    CURL *curl;
    CURLcode ret;
    char* resolved_url = NULL;
    curl = curl_easy_init();
    if(curl)
    {
        curl_easy_setopt(curl,CURLOPT_URL,"http://t.cn/zOHA0h2");
        curl_easy_setopt(curl,CURLOPT_FOLLOWLOCATION,1);
        curl_easy_setopt(curl,CURLOPT_HEADER,1);
        curl_easy_setopt(curl,CURLOPT_NOBODY,1);
        curl_easy_setopt(curl,CURLOPT_TIMEOUT,5);
        //curl_easy_setopt(curl,CURLOPT_PROXY,"127.0.0.1:8087");
        ret = curl_easy_perform(curl);

        if(ret == 0 )
        {
           ret = curl_easy_getinfo(curl,CURLINFO_EFFECTIVE_URL,&resolved_url); 
           printf("resolve success\n");
           printf("resolved_url is %s",resolved_url);
        }
        else
        {
            printf("resolve failed, error code is %d\n",ret);
        }
        curl_easy_cleanup(curl);
    }
    return 0;	
}