curl_easy_getinfo(3) Library Functions Manual curl_easy_getinfo(3)
NAME
curl_easy_getinfo - extract information from a curl handle
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *curl, CURLINFO info, ... );
DESCRIPTION
Get the info kept in the curl handle. The third argument MUST be point-
ing to the specific type of the used option which is documented in each
man page of the info option. The data is stored accordingly and can be
relied upon only if this 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.
OPTIONS
The following information can be extracted:
CURLINFO_ACTIVESOCKET
The session's active socket. See CURLINFO_ACTIVESOCKET(3)
CURLINFO_APPCONNECT_TIME
The time it took from the start until the SSL connect/handshake
with the remote host was completed as a double in number of sec-
onds. (Added in 7.19.0)
CURLINFO_APPCONNECT_TIME_T
The time it took from the start until the SSL connect/handshake
with the remote host was completed in number of microseconds.
(Added in 7.60.0) See CURLINFO_APPCONNECT_TIME_T(3)
CURLINFO_CAINFO
Get the default value for CURLOPT_CAINFO(3). See
CURLINFO_CAINFO(3)
CURLINFO_CAPATH
Get the default value for CURLOPT_CAPATH(3). See CURLINFO_CAP-
ATH(3)
CURLINFO_CERTINFO
Certificate chain. See CURLINFO_CERTINFO(3)
CURLINFO_CONDITION_UNMET
Whether or not a time conditional was met or 304 HTTP response.
See CURLINFO_CONDITION_UNMET(3)
CURLINFO_CONNECT_TIME
The time it took from the start until the connect to the remote
host (or proxy) was completed. As a double. See CURLINFO_CON-
NECT_TIME(3)
CURLINFO_CONNECT_TIME_T
The time it took from the start until the connect to the remote
host (or proxy) was completed. In microseconds. See CURLINFO_CON-
NECT_TIME_T(3).
CURLINFO_CONN_ID
The ID of the last connection used by the transfer. (Added in
8.2.0) See CURLINFO_CONN_ID(3)
CURLINFO_CONTENT_LENGTH_DOWNLOAD
(Deprecated) Content length from the Content-Length header. See
CURLINFO_CONTENT_LENGTH_DOWNLOAD(3)
CURLINFO_CONTENT_LENGTH_DOWNLOAD_T
Content length from the Content-Length header. See CURLINFO_CON-
TENT_LENGTH_DOWNLOAD_T(3)
CURLINFO_CONTENT_LENGTH_UPLOAD
(Deprecated) Upload size. See CURLINFO_CONTENT_LENGTH_UPLOAD(3)
CURLINFO_CONTENT_LENGTH_UPLOAD_T
Upload size. See CURLINFO_CONTENT_LENGTH_UPLOAD_T(3)
CURLINFO_CONTENT_TYPE
Content type from the Content-Type: header. We recommend using
curl_easy_header(3) instead. See CURLINFO_CONTENT_TYPE(3)
CURLINFO_COOKIELIST
List of all known cookies. See CURLINFO_COOKIELIST(3)
CURLINFO_EARLYDATA_SENT_T
Amount of TLS early data sent (in number of bytes) when CURLSS-
LOPT_EARLYDATA is enabled.
CURLINFO_EFFECTIVE_METHOD
Last used HTTP method. See CURLINFO_EFFECTIVE_METHOD(3)
CURLINFO_EFFECTIVE_URL
Last used URL. See CURLINFO_EFFECTIVE_URL(3)
CURLINFO_FILETIME
Remote time of the retrieved document. See CURLINFO_FILETIME(3)
CURLINFO_FILETIME_T
Remote time of the retrieved document. See CURLINFO_FILETIME_T(3)
CURLINFO_FTP_ENTRY_PATH
The entry path after logging in to an FTP server. See
CURLINFO_FTP_ENTRY_PATH(3)
CURLINFO_HEADER_SIZE
Number of bytes of all headers received. See
CURLINFO_HEADER_SIZE(3)
CURLINFO_HTTPAUTH_AVAIL
Available HTTP authentication methods. See
CURLINFO_HTTPAUTH_AVAIL(3)
CURLINFO_HTTPAUTH_USED
Used HTTP authentication method. See CURLINFO_HTTPAUTH_USED(3)
CURLINFO_HTTP_CONNECTCODE
Last proxy CONNECT response code. See CURLINFO_HTTP_CONNECT-
CODE(3)
CURLINFO_HTTP_VERSION
The http version used in the connection. See CURLINFO_HTTP_VER-
SION(3)
CURLINFO_LASTSOCKET
(Deprecated) Last socket used. See CURLINFO_LASTSOCKET(3)
CURLINFO_LOCAL_IP
Source IP address of the last connection. See CURLINFO_LO-
CAL_IP(3)
CURLINFO_LOCAL_PORT
Source port number of the last connection. See CURLINFO_LO-
CAL_PORT(3)
CURLINFO_NAMELOOKUP_TIME
Time from start until name resolving completed as a double. See
CURLINFO_NAMELOOKUP_TIME(3)
CURLINFO_NAMELOOKUP_TIME_T
Time from start until name resolving completed in number of mi-
croseconds. See CURLINFO_NAMELOOKUP_TIME_T(3)
CURLINFO_NUM_CONNECTS
Number of new successful connections used for previous transfer.
See CURLINFO_NUM_CONNECTS(3)
CURLINFO_OS_ERRNO
The errno from the last failure to connect. See CURLINFO_OS_ER-
RNO(3)
CURLINFO_POSTTRANSFER_TIME_T
The time it took from the start until the last byte is sent by
libcurl. In microseconds. (Added in 8.10.0) See CURLINFO_POST-
TRANSFER_TIME_T(3)
CURLINFO_PRETRANSFER_TIME
The time it took from the start until the file transfer is just
about to begin. This includes all pre-transfer commands and nego-
tiations that are specific to the particular protocol(s) in-
volved. See CURLINFO_PRETRANSFER_TIME(3)
CURLINFO_PRETRANSFER_TIME_T
The time it took from the start until the file transfer is just
about to begin. This includes all pre-transfer commands and nego-
tiations that are specific to the particular protocol(s) in-
volved. In microseconds. See CURLINFO_PRETRANSFER_TIME_T(3)
CURLINFO_PRIMARY_IP
Destination IP address of the last connection. See CURLINFO_PRI-
MARY_IP(3)
CURLINFO_PRIMARY_PORT
Destination port of the last connection. See CURLINFO_PRI-
MARY_PORT(3)
CURLINFO_PRIVATE
User's private data pointer. See CURLINFO_PRIVATE(3)
CURLINFO_PROTOCOL
(Deprecated) The protocol used for the connection. (Added in
7.52.0) See CURLINFO_PROTOCOL(3)
CURLINFO_PROXYAUTH_AVAIL
Available HTTP proxy authentication methods. See CURLINFO_PROX-
YAUTH_AVAIL(3)
CURLINFO_PROXYAUTH_USED
Used HTTP proxy authentication methods. See CURLINFO_PROX-
YAUTH_USED(3)
CURLINFO_PROXY_ERROR
Detailed proxy error. See CURLINFO_PROXY_ERROR(3)
CURLINFO_PROXY_SSL_VERIFYRESULT
Proxy certificate verification result. See
CURLINFO_PROXY_SSL_VERIFYRESULT(3)
CURLINFO_QUEUE_TIME_T
The time during which the transfer was held in a waiting queue
before it could start for real in number of microseconds. (Added
in 8.6.0) See CURLINFO_QUEUE_TIME_T(3)
CURLINFO_REDIRECT_COUNT
Total number of redirects that were followed. See CURLINFO_REDI-
RECT_COUNT(3)
CURLINFO_REDIRECT_TIME
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. As a dou-
ble. See CURLINFO_REDIRECT_TIME(3)
CURLINFO_REDIRECT_TIME_T
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. In number
of microseconds. See CURLINFO_REDIRECT_TIME_T(3)
CURLINFO_REDIRECT_URL
URL a redirect would take you to, had you enabled redirects. See
CURLINFO_REDIRECT_URL(3)
CURLINFO_REFERER
Referrer header. See CURLINFO_REFERER(3)
CURLINFO_REQUEST_SIZE
Number of bytes sent in the issued HTTP requests. See
CURLINFO_REQUEST_SIZE(3)
CURLINFO_RESPONSE_CODE
Last received response code. See CURLINFO_RESPONSE_CODE(3)
CURLINFO_RETRY_AFTER
The value from the Retry-After header. See CURLINFO_RETRY_AF-
TER(3)
CURLINFO_RTSP_CLIENT_CSEQ
The RTSP client CSeq that is expected next. See
CURLINFO_RTSP_CLIENT_CSEQ(3)
CURLINFO_RTSP_CSEQ_RECV
RTSP CSeq last received. See CURLINFO_RTSP_CSEQ_RECV(3)
CURLINFO_RTSP_SERVER_CSEQ
The RTSP server CSeq that is expected next. See
CURLINFO_RTSP_SERVER_CSEQ(3)
CURLINFO_RTSP_SESSION_ID
RTSP session ID. See CURLINFO_RTSP_SESSION_ID(3)
CURLINFO_SCHEME
The scheme used for the connection. (Added in 7.52.0) See
CURLINFO_SCHEME(3)
CURLINFO_SIZE_DOWNLOAD
(Deprecated) Number of bytes downloaded. See CURLINFO_SIZE_DOWN-
LOAD(3)
CURLINFO_SIZE_DOWNLOAD_T
Number of bytes downloaded. See CURLINFO_SIZE_DOWNLOAD_T(3)
CURLINFO_SIZE_UPLOAD
(Deprecated) Number of bytes uploaded. See CURLINFO_SIZE_UP-
LOAD(3)
CURLINFO_SIZE_UPLOAD_T
Number of bytes uploaded. See CURLINFO_SIZE_UPLOAD_T(3)
CURLINFO_SPEED_DOWNLOAD
(Deprecated) Average download speed. See CURLINFO_SPEED_DOWN-
LOAD(3)
CURLINFO_SPEED_DOWNLOAD_T
Average download speed. See CURLINFO_SPEED_DOWNLOAD_T(3)
CURLINFO_SPEED_UPLOAD
(Deprecated) Average upload speed. See CURLINFO_SPEED_UPLOAD(3)
CURLINFO_SPEED_UPLOAD_T
Average upload speed in number of bytes per second. See
CURLINFO_SPEED_UPLOAD_T(3)
CURLINFO_SSL_ENGINES
A list of OpenSSL crypto engines. See CURLINFO_SSL_ENGINES(3)
CURLINFO_SSL_VERIFYRESULT
Certificate verification result. See CURLINFO_SSL_VERIFYRESULT(3)
CURLINFO_STARTTRANSFER_TIME
The time it took from the start until the first byte is received
by libcurl. As a double. See CURLINFO_STARTTRANSFER_TIME(3)
CURLINFO_STARTTRANSFER_TIME_T
The time it took from the start until the first byte is received
by libcurl. In microseconds. See CURLINFO_STARTTRANS-
FER_TIME_T(3)
CURLINFO_TLS_SESSION
(Deprecated) TLS session info that can be used for further pro-
cessing. See CURLINFO_TLS_SESSION(3). Use CURLINFO_TLS_SSL_PTR(3)
instead.
CURLINFO_TLS_SSL_PTR
TLS session info that can be used for further processing. See
CURLINFO_TLS_SSL_PTR(3)
CURLINFO_TOTAL_TIME
Total time of previous transfer. See CURLINFO_TOTAL_TIME(3)
CURLINFO_TOTAL_TIME_T
Total time of previous transfer. See CURLINFO_TOTAL_TIME_T(3)
CURLINFO_USED_PROXY
Whether the proxy was used (Added in 8.7.0). See
CURLINFO_USED_PROXY(3)
CURLINFO_XFER_ID
The ID of the transfer. (Added in 8.2.0) See CURLINFO_XFER_ID(3)
TIMES
An overview of the time values available from curl_easy_getinfo(3)
curl_easy_perform()
|
|--QUEUE
|--|--NAMELOOKUP
|--|--|--CONNECT
|--|--|--|--APPCONNECT
|--|--|--|--|--PRETRANSFER
|--|--|--|--|--|--POSTTRANSFER
|--|--|--|--|--|--|--STARTTRANSFER
|--|--|--|--|--|--|--|--TOTAL
|--|--|--|--|--|--|--|--REDIRECT
CURLINFO_QUEUE_TIME_T(3), CURLINFO_NAMELOOKUP_TIME_T(3),
CURLINFO_CONNECT_TIME_T(3), CURLINFO_APPCONNECT_TIME_T(3),
CURLINFO_PRETRANSFER_TIME_T(3), CURLINFO_POSTTRANSFER_TIME_T(3),
CURLINFO_STARTTRANSFER_TIME_T(3), CURLINFO_TOTAL_TIME_T(3),
CURLINFO_REDIRECT_TIME_T(3)
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://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);
}
}
AVAILABILITY
Added in curl 7.4.1
RETURN VALUE
This function returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred,
see libcurl-errors(3). If CURLOPT_ERRORBUFFER(3) was set with
curl_easy_setopt(3) there can be an error message stored in the error
buffer when non-zero is returned.
SEE ALSO
curl_easy_setopt(3)
libcurl 2026-07-12 curl_easy_getinfo(3)
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