CURLINFO_PROTOCOL explained
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 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 is set to 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
This functionality affects all supported protocols
Example
int main(void) { 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); } }
Deprecated
Deprecated since 7.85.0.
Availability
Added in curl 7.52.0
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)
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