linux c语言 curl

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

int main(void) {
  CURL *curl;
  CURLcode res;

  curl_global_init(CURL_GLOBAL_DEFAULT);
  curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
    
    // 设置回调函数处理响应数据
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
    char response[256];
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, response);

    res = curl_easy_perform(curl);
    if(res != CURLE_OK)
      fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));

    printf("Response: %s\n", response);

    curl_easy_cleanup(curl);
  }

  curl_global_cleanup();
  return 0;
}

// 回调函数
size_t write_callback(void *ptr, size_t size, size_t nmemb, void *userdata) {
  size_t realsize = size * nmemb;
  char *response = (char *)userdata;
  strcat(response, (char *)ptr);
  return realsize;
}

curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);