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  #include "stdafx.h"
  #include "curl/curl.h"
  #pragma comment(lib, "libcurl.lib")
  static size_t write_buff_data(char *buffer, size_t size, size_t nitems, void *outstream)
  {
    memcpy(outstream, buffer, nitems*size);
    return nitems*size;
  }

  int GetUrlHTTP(char *url, char *buff)
  {
    CURL *curl;
    CURLcode res;
    curl = curl_easy_init();
    if (curl)
    {
      curl_easy_setopt(curl, CURLOPT_PROXY,"http://1.1.1.1:10000");
      curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*)buff);
      curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_buff_data);
      curl_easy_setopt(curl, CURLOPT_URL, url);
      curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, 10L);
      curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 50L);
      curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, 2000000L);

      res = curl_easy_perform(curl);
      curl_easy_cleanup(curl);
      if (res == CURLE_OK){
        return res;
      }else {
        printf("%d\n", res);
      }
    }
    return res;
  }

  int GetUrlSocks5(char *url, char *buff)
  {
    CURL *curl;
    CURLcode res;
    curl = curl_easy_init();
    if (curl)
    {
      curl_easy_setopt(curl, CURLOPT_PROXY, "socks5://1.1.1.1:10000");
      curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*)buff);
      curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_buff_data);
      curl_easy_setopt(curl, CURLOPT_URL, url);
      curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, 10L);
      curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 50L);
      curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, 2000000L);
      res = curl_easy_perform(curl);
      curl_easy_cleanup(curl);
      if (res == CURLE_OK) {
        return res;
      }
      else {
        printf("%d\n", res);
      }
    }
    return res;
  }

  int main()
  {
    char *buff=(char*)malloc(1024*1024);
    memset(buff, 0, 1024 * 1024);
    GetUrlHTTP("http://ipinfo.io", buff);
    printf(" %s\n", buff);
    memset(buff, 0,1024 * 1024);
    GetUrlSocks5("http://ipinfo.io", buff);
    printf("%s\n", buff);
    free(buff);
    Sleep(10 * 1000);
      return 0;
  }