curl_easy_perform close 关闭方法

如果一个连接服务器不断开，则curl_easy_perform会一直阻塞。这个时候就需要关闭或断开连接的方法。

常用的方法是设置连接超时，或者总超时，本处使用原始socket close

CURLINFO_ACTIVESOCKET - get the active socket

Example

CURL *curl = curl_easy_init();
if(curl) {
  curl_socket_t sockfd;
  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
  /* Do not do the transfer - only connect to host */
  curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1L);
  res = curl_easy_perform(curl);
 
  /* Extract the socket from the curl handle */
  res = curl_easy_getinfo(curl, CURLINFO_ACTIVESOCKET, &sockfd);
 
  if(res != CURLE_OK) {
    printf("Error: %s\n", curl_easy_strerror(res));
    return 1;
  }
}

另一个获取sock的方法

curl_easy_setopt(curl, CURLOPT_OPENSOCKETFUNCTION, my_opensocketfunc);

curl_socket_t my_opensocketfunc(void *clientp,curlsocktype purpose,struct curl_sockaddr *address)
{
    curl_socket_t sock=socket(address->family, address->socktype, address->protocol);
    printf("my_opensocketfunc sock = %d\n", sock);
    return  sock;
}

超时的配置见
CURLOPT_CONNECTTIMEOUT

Timeout for the connection phase. See CURLOPT_CONNECTTIMEOUT

CURLOPT_CONNECTTIMEOUT_MS

Millisecond timeout for the connection phase. See CURLOPT_CONNECTTIMEOUT_MS

CURLOPT_TIMEOUT

Timeout for the entire request. See CURLOPT_TIMEOUT

本文链接地址：https://const.net.cn/620.html