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* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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CURLINFO_HTTP_CONNECTCODE - get the CONNECT response code #include <curl/curl.h> CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HTTP_CONNECTCODE, long *p); Pass a pointer to a long to receive the last received HTTP proxy response code to a CONNECT request. The returned value will be zero if no such response code was available. HTTP

CURL *curl = curl_easy_init();
if(curl) {
 CURLcode res;
 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

 /* typically CONNECT is used to do HTTPS over HTTP proxies */
 curl_easy_setopt(curl, CURLOPT_PROXY, "http://127.0.0.1");
 res = curl_easy_perform(curl);
 if(res == CURLE_OK) {
 long code;
 res = curl_easy_getinfo(curl, CURLINFO_HTTP_CONNECTCODE, &code);
 if(!res && code)
 printf("The CONNECT response code: %03ld\\n", code);
 }
 curl_easy_cleanup(curl);
}

Added in 7.10.7 Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. CURLINFO_RESPONSE_CODE "(3), " curl_easy_getinfo "(3), " curl_easy_setopt "(3), "