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CURLINFO_PROTOCOL(3)                libcurl               CURLINFO_PROTOCOL(3)


NAME

       CURLINFO_PROTOCOL - get the protocol used in the connection


SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PROTOCOL, long *p);


DESCRIPTION

       This option is deprecated. We strongly recommend using
       CURLINFO_SCHEME(3) instead, because this option cannot return all
       possible protocols!

       Pass a pointer to a long to receive the version used in the last http
       connection.  The returned value will be exactly one of the CURLPROTO_*
       values:

       CURLPROTO_DICT, CURLPROTO_FILE, CURLPROTO_FTP, CURLPROTO_FTPS,
       CURLPROTO_GOPHER, CURLPROTO_HTTP, CURLPROTO_HTTPS, CURLPROTO_IMAP,
       CURLPROTO_IMAPS, CURLPROTO_LDAP, CURLPROTO_LDAPS, CURLPROTO_POP3,
       CURLPROTO_POP3S, CURLPROTO_RTMP, CURLPROTO_RTMPE, CURLPROTO_RTMPS,
       CURLPROTO_RTMPT, CURLPROTO_RTMPTE, CURLPROTO_RTMPTS, CURLPROTO_RTSP,
       CURLPROTO_SCP, CURLPROTO_SFTP, CURLPROTO_SMB, CURLPROTO_SMBS, CURLPROTO_SMTP,
       CURLPROTO_SMTPS, CURLPROTO_TELNET, CURLPROTO_TFTP, CURLPROTO_MQTT


PROTOCOLS

       All


EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         CURLcode res;
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
         res = curl_easy_perform(curl);
         if(res == CURLE_OK) {
           long protocol;
           curl_easy_getinfo(curl, CURLINFO_PROTOCOL, &protocol);
         }
         curl_easy_cleanup(curl);
       }


AVAILABILITY

       Added in 7.52.0. Deprecated since 7.85.0.


RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
       if not.


SEE ALSO

       CURLINFO_RESPONSE_CODE(3),  curl_easy_getinfo(3), curl_easy_setopt(3),

ibcurl 8.1.2                    April 26, 2023            CURLINFO_PROTOCOL(3)

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