.\" ************************************************************************** .\" * _ _ ____ _ .\" * Project ___| | | | _ \| | .\" * / __| | | | |_) | | .\" * | (__| |_| | _ <| |___ .\" * \___|\___/|_| \_\_____| .\" * .\" * Copyright (C) Daniel Stenberg, , et al. .\" * .\" * This software is licensed as described in the file COPYING, which .\" * you should have received as part of this distribution. The terms .\" * are also available at https://curl.se/docs/copyright.html. .\" * .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell .\" * copies of the Software, and permit persons to whom the Software is .\" * furnished to do so, under the terms of the COPYING file. .\" * .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY .\" * KIND, either express or implied. .\" * .\" * SPDX-License-Identifier: curl .\" * .\" ************************************************************************** .\" .TH curl_easy_getinfo 3 "January 02, 2023" "libcurl 7.88.1" "libcurl Manual" .SH NAME curl_easy_getinfo - extract information from a curl handle .SH SYNOPSIS .nf #include CURLcode curl_easy_getinfo(CURL *curl, CURLINFO info, ... ); .fi .SH DESCRIPTION Request internal information from the curl session with this function. The third argument \fBMUST\fP be a pointer to a long, a pointer to a char *, a pointer to a struct curl_slist * or a pointer to a double (as this documentation describes further down). The data pointed-to will be filled in accordingly and can be relied upon only if the function returns CURLE_OK. Use this function AFTER a performed transfer if you want to get transfer related data. You should not free the memory returned by this function unless it is explicitly mentioned below. .SH AVAILABLE INFORMATION The following information can be extracted: .IP CURLINFO_EFFECTIVE_METHOD Last used HTTP method. See \fICURLINFO_EFFECTIVE_METHOD(3)\fP .IP CURLINFO_EFFECTIVE_URL Last used URL. See \fICURLINFO_EFFECTIVE_URL(3)\fP .IP CURLINFO_RESPONSE_CODE Last received response code. See \fICURLINFO_RESPONSE_CODE(3)\fP .IP CURLINFO_REFERER Referrer header. See \fICURLINFO_REFERER(3)\fP .IP CURLINFO_HTTP_CONNECTCODE Last proxy CONNECT response code. See \fICURLINFO_HTTP_CONNECTCODE(3)\fP .IP CURLINFO_HTTP_VERSION The http version used in the connection. See \fICURLINFO_HTTP_VERSION(3)\fP .IP CURLINFO_FILETIME Remote time of the retrieved document. See \fICURLINFO_FILETIME(3)\fP .IP CURLINFO_FILETIME_T Remote time of the retrieved document. See \fICURLINFO_FILETIME_T(3)\fP .IP CURLINFO_TOTAL_TIME Total time of previous transfer. See \fICURLINFO_TOTAL_TIME(3)\fP .IP CURLINFO_TOTAL_TIME_T Total time of previous transfer. See \fICURLINFO_TOTAL_TIME_T(3)\fP .IP CURLINFO_NAMELOOKUP_TIME Time from start until name resolving completed. See \fICURLINFO_NAMELOOKUP_TIME(3)\fP .IP CURLINFO_NAMELOOKUP_TIME_T Time from start until name resolving completed. See \fICURLINFO_NAMELOOKUP_TIME_T(3)\fP .IP CURLINFO_CONNECT_TIME Time from start until remote host or proxy completed. See \fICURLINFO_CONNECT_TIME(3)\fP .IP CURLINFO_CONNECT_TIME_T Time from start until remote host or proxy completed. See \fICURLINFO_CONNECT_TIME_T(3)\fP .IP CURLINFO_APPCONNECT_TIME Time from start until SSL/SSH handshake completed. See \fICURLINFO_APPCONNECT_TIME(3)\fP .IP CURLINFO_APPCONNECT_TIME_T Time from start until SSL/SSH handshake completed. See \fICURLINFO_APPCONNECT_TIME_T(3)\fP .IP CURLINFO_PRETRANSFER_TIME Time from start until just before the transfer begins. See \fICURLINFO_PRETRANSFER_TIME(3)\fP .IP CURLINFO_PRETRANSFER_TIME_T Time from start until just before the transfer begins. See \fICURLINFO_PRETRANSFER_TIME_T(3)\fP .IP CURLINFO_STARTTRANSFER_TIME Time from start until just when the first byte is received. See \fICURLINFO_STARTTRANSFER_TIME(3)\fP .IP CURLINFO_STARTTRANSFER_TIME_T Time from start until just when the first byte is received. See \fICURLINFO_STARTTRANSFER_TIME_T(3)\fP .IP CURLINFO_REDIRECT_TIME Time taken for all redirect steps before the final transfer. See \fICURLINFO_REDIRECT_TIME(3)\fP .IP CURLINFO_REDIRECT_TIME_T Time taken for all redirect steps before the final transfer. See \fICURLINFO_REDIRECT_TIME_T(3)\fP .IP CURLINFO_REDIRECT_COUNT Total number of redirects that were followed. See \fICURLINFO_REDIRECT_COUNT(3)\fP .IP CURLINFO_REDIRECT_URL URL a redirect would take you to, had you enabled redirects. See \fICURLINFO_REDIRECT_URL(3)\fP .IP CURLINFO_SIZE_UPLOAD (Deprecated) Number of bytes uploaded. See \fICURLINFO_SIZE_UPLOAD(3)\fP .IP CURLINFO_SIZE_UPLOAD_T Number of bytes uploaded. See \fICURLINFO_SIZE_UPLOAD_T(3)\fP .IP CURLINFO_SIZE_DOWNLOAD (Deprecated) Number of bytes downloaded. See \fICURLINFO_SIZE_DOWNLOAD(3)\fP .IP CURLINFO_SIZE_DOWNLOAD_T Number of bytes downloaded. See \fICURLINFO_SIZE_DOWNLOAD_T(3)\fP .IP CURLINFO_SPEED_DOWNLOAD (Deprecated) Average download speed. See \fICURLINFO_SPEED_DOWNLOAD(3)\fP .IP CURLINFO_SPEED_DOWNLOAD_T Average download speed. See \fICURLINFO_SPEED_DOWNLOAD_T(3)\fP .IP CURLINFO_SPEED_UPLOAD (Deprecated) Average upload speed. See \fICURLINFO_SPEED_UPLOAD(3)\fP .IP CURLINFO_SPEED_UPLOAD_T Average upload speed. See \fICURLINFO_SPEED_UPLOAD_T(3)\fP .IP CURLINFO_HEADER_SIZE Number of bytes of all headers received. See \fICURLINFO_HEADER_SIZE(3)\fP .IP CURLINFO_REQUEST_SIZE Number of bytes sent in the issued HTTP requests. See \fICURLINFO_REQUEST_SIZE(3)\fP .IP CURLINFO_SSL_VERIFYRESULT Certificate verification result. See \fICURLINFO_SSL_VERIFYRESULT(3)\fP .IP CURLINFO_PROXY_ERROR Detailed proxy error. See \fICURLINFO_PROXY_ERROR(3)\fP .IP CURLINFO_PROXY_SSL_VERIFYRESULT Proxy certificate verification result. See \fICURLINFO_PROXY_SSL_VERIFYRESULT(3)\fP .IP CURLINFO_SSL_ENGINES A list of OpenSSL crypto engines. See \fICURLINFO_SSL_ENGINES(3)\fP .IP CURLINFO_CONTENT_LENGTH_DOWNLOAD (Deprecated) Content length from the Content-Length header. See \fICURLINFO_CONTENT_LENGTH_DOWNLOAD(3)\fP .IP CURLINFO_CONTENT_LENGTH_DOWNLOAD_T Content length from the Content-Length header. See \fICURLINFO_CONTENT_LENGTH_DOWNLOAD_T(3)\fP .IP CURLINFO_CONTENT_LENGTH_UPLOAD (Deprecated) Upload size. See \fICURLINFO_CONTENT_LENGTH_UPLOAD(3)\fP .IP CURLINFO_CONTENT_LENGTH_UPLOAD_T Upload size. See \fICURLINFO_CONTENT_LENGTH_UPLOAD_T(3)\fP .IP CURLINFO_CONTENT_TYPE Content type from the Content-Type header. See \fICURLINFO_CONTENT_TYPE(3)\fP .IP CURLINFO_RETRY_AFTER The value from the from the Retry-After header. See \fICURLINFO_RETRY_AFTER(3)\fP .IP CURLINFO_PRIVATE User's private data pointer. See \fICURLINFO_PRIVATE(3)\fP .IP CURLINFO_HTTPAUTH_AVAIL Available HTTP authentication methods. See \fICURLINFO_HTTPAUTH_AVAIL(3)\fP .IP CURLINFO_PROXYAUTH_AVAIL Available HTTP proxy authentication methods. See \fICURLINFO_PROXYAUTH_AVAIL(3)\fP .IP CURLINFO_OS_ERRNO The errno from the last failure to connect. See \fICURLINFO_OS_ERRNO(3)\fP .IP CURLINFO_NUM_CONNECTS Number of new successful connections used for previous transfer. See \fICURLINFO_NUM_CONNECTS(3)\fP .IP CURLINFO_PRIMARY_IP IP address of the last connection. See \fICURLINFO_PRIMARY_IP(3)\fP .IP CURLINFO_PRIMARY_PORT Port of the last connection. See \fICURLINFO_PRIMARY_PORT(3)\fP .IP CURLINFO_LOCAL_IP Local-end IP address of last connection. See \fICURLINFO_LOCAL_IP(3)\fP .IP CURLINFO_LOCAL_PORT Local-end port of last connection. See \fICURLINFO_LOCAL_PORT(3)\fP .IP CURLINFO_COOKIELIST List of all known cookies. See \fICURLINFO_COOKIELIST(3)\fP .IP CURLINFO_LASTSOCKET (Deprecated) Last socket used. See \fICURLINFO_LASTSOCKET(3)\fP .IP CURLINFO_ACTIVESOCKET The session's active socket. See \fICURLINFO_ACTIVESOCKET(3)\fP .IP CURLINFO_FTP_ENTRY_PATH The entry path after logging in to an FTP server. See \fICURLINFO_FTP_ENTRY_PATH(3)\fP .IP CURLINFO_CAPATH Get the default value for \fICURLOPT_CAPATH(3)\fP. See \fICURLINFO_CAPATH(3)\fP .IP CURLINFO_CAINFO Get the default value for \fICURLOPT_CAINFO(3)\fP. See \fICURLINFO_CAINFO(3)\fP .IP CURLINFO_CERTINFO Certificate chain. See \fICURLINFO_CERTINFO(3)\fP .IP CURLINFO_TLS_SSL_PTR TLS session info that can be used for further processing. See \fICURLINFO_TLS_SSL_PTR(3)\fP .IP CURLINFO_TLS_SESSION TLS session info that can be used for further processing. See \fICURLINFO_TLS_SESSION(3)\fP. Deprecated option, use \fICURLINFO_TLS_SSL_PTR(3)\fP instead! .IP CURLINFO_CONDITION_UNMET Whether or not a time conditional was met or 304 HTTP response. See \fICURLINFO_CONDITION_UNMET(3)\fP .IP CURLINFO_RTSP_SESSION_ID RTSP session ID. See \fICURLINFO_RTSP_SESSION_ID(3)\fP .IP CURLINFO_RTSP_CLIENT_CSEQ RTSP CSeq that will next be used. See \fICURLINFO_RTSP_CLIENT_CSEQ(3)\fP .IP CURLINFO_RTSP_SERVER_CSEQ RTSP CSeq that will next be expected. See \fICURLINFO_RTSP_SERVER_CSEQ(3)\fP .IP CURLINFO_RTSP_CSEQ_RECV RTSP CSeq last received. See \fICURLINFO_RTSP_CSEQ_RECV(3)\fP .IP CURLINFO_PROTOCOL (Deprecated) The protocol used for the connection. (Added in 7.52.0) See \fICURLINFO_PROTOCOL(3)\fP .IP CURLINFO_SCHEME The scheme used for the connection. (Added in 7.52.0) See \fICURLINFO_SCHEME(3)\fP .SH TIMES .nf An overview of the six time values available from curl_easy_getinfo() curl_easy_perform() | |--NAMELOOKUP |--|--CONNECT |--|--|--APPCONNECT |--|--|--|--PRETRANSFER |--|--|--|--|--STARTTRANSFER |--|--|--|--|--|--TOTAL |--|--|--|--|--|--REDIRECT .fi .IP NAMELOOKUP \fICURLINFO_NAMELOOKUP_TIME\fP and \fICURLINFO_NAMELOOKUP_TIME_T\fP. The time it took from the start until the name resolving was completed. .IP CONNECT \fICURLINFO_CONNECT_TIME\fP and \fICURLINFO_CONNECT_TIME_T\fP. The time it took from the start until the connect to the remote host (or proxy) was completed. .IP APPCONNECT \fICURLINFO_APPCONNECT_TIME\fP and \fICURLINFO_APPCONNECT_TIME_T\fP. The time it took from the start until the SSL connect/handshake with the remote host was completed. (Added in 7.19.0) The latter is the integer version (measuring microseconds). (Added in 7.60.0) .IP PRETRANSFER \fICURLINFO_PRETRANSFER_TIME\fP and \fICURLINFO_PRETRANSFER_TIME_T\fP. The time it took from the start until the file transfer is just about to begin. This includes all pre-transfer commands and negotiations that are specific to the particular protocol(s) involved. .IP STARTTRANSFER \fICURLINFO_STARTTRANSFER_TIME\fP and \fICURLINFO_STARTTRANSFER_TIME_T\fP. The time it took from the start until the first byte is received by libcurl. .IP TOTAL \fICURLINFO_TOTAL_TIME\fP and \fICURLINFO_TOTAL_TIME_T\fP. Total time of the previous request. .IP REDIRECT \fICURLINFO_REDIRECT_TIME\fP and \fICURLINFO_REDIRECT_TIME_T\fP. The time it took for all redirection steps include name lookup, connect, pretransfer and transfer before final transaction was started. So, this is zero if no redirection took place. .SH EXAMPLE .nf curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/"); res = curl_easy_perform(curl); if(CURLE_OK == res) { char *ct; /* ask for the content-type */ res = curl_easy_getinfo(curl, CURLINFO_CONTENT_TYPE, &ct); if((CURLE_OK == res) && ct) printf("We received Content-Type: %s\\n", ct); } /* always cleanup */ curl_easy_cleanup(curl); } .fi .SH AVAILABILITY Added in 7.4.1 .SH RETURN VALUE If the operation was successful, CURLE_OK is returned. Otherwise an appropriate error code will be returned. .SH "SEE ALSO" .BR curl_easy_setopt "(3)"