是否可以使用libcurl禁用HTTP Keep-Alive？

Question

I am implementing HTTP client for third-party private API. This API requires to not use HTTP Keep-Alive. Can libcurl disable Keep-Alive? Even when I set CURLOPT_FORBID_REUSE , it still sends Connection: Keep-Alive header and confuses server. It even sends this header if I manually set Connection: close header. In such situation libcurl sends both Connection: Keep-Alive and Connection: close HTTP headers. Does anyone know how to force libcurl to never reuse connections and send Connection: close header to notify server that it doesn't use connection, or Connection: Keep-Alive is hardcoded in libcurl and can not be altered?

Answer 1

This can be achieved with CURLOPT_HTTPHEADER :

#include <curl/curl.h>

int main(void) {
    CURL *curl = curl_easy_init();
    struct curl_slist *list = NULL;
    if(curl) {
        curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
        list = curl_slist_append(list, "Connection: close");
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, list);
        curl_easy_perform(curl);
        curl_slist_free_all(list);
        curl_easy_cleanup(curl);
    }
}

At least it works on my Linux.