Provided by: libcurl4-doc_7.81.0-1ubuntu1.19_all 
NAME
curl_easy_getinfo - extract information from a curl handle
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *curl, CURLINFO info, ... );
DESCRIPTION
Request internal information from the curl session with this function. The third argument
MUST 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.
AVAILABLE INFORMATION
The following information can be extracted:
CURLINFO_EFFECTIVE_METHOD
Last used HTTP method. See CURLINFO_EFFECTIVE_METHOD(3)
CURLINFO_EFFECTIVE_URL
Last used URL. See CURLINFO_EFFECTIVE_URL(3)
CURLINFO_RESPONSE_CODE
Last received response code. See CURLINFO_RESPONSE_CODE(3)
CURLINFO_REFERER
Referrer header. See CURLINFO_REFERER(3)
CURLINFO_HTTP_CONNECTCODE
Last proxy CONNECT response code. See CURLINFO_HTTP_CONNECTCODE(3)
CURLINFO_HTTP_VERSION
The http version used in the connection. See CURLINFO_HTTP_VERSION(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_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_NAMELOOKUP_TIME
Time from start until name resolving completed. See CURLINFO_NAMELOOKUP_TIME(3)
CURLINFO_NAMELOOKUP_TIME_T
Time from start until name resolving completed. See CURLINFO_NAMELOOKUP_TIME_T(3)
CURLINFO_CONNECT_TIME
Time from start until remote host or proxy completed. See CURLINFO_CONNECT_TIME(3)
CURLINFO_CONNECT_TIME_T
Time from start until remote host or proxy completed. See
CURLINFO_CONNECT_TIME_T(3)
CURLINFO_APPCONNECT_TIME
Time from start until SSL/SSH handshake completed. See CURLINFO_APPCONNECT_TIME(3)
CURLINFO_APPCONNECT_TIME_T
Time from start until SSL/SSH handshake completed. See
CURLINFO_APPCONNECT_TIME_T(3)
CURLINFO_PRETRANSFER_TIME
Time from start until just before the transfer begins. See
CURLINFO_PRETRANSFER_TIME(3)
CURLINFO_PRETRANSFER_TIME_T
Time from start until just before the transfer begins. See
CURLINFO_PRETRANSFER_TIME_T(3)
CURLINFO_STARTTRANSFER_TIME
Time from start until just when the first byte is received. See
CURLINFO_STARTTRANSFER_TIME(3)
CURLINFO_STARTTRANSFER_TIME_T
Time from start until just when the first byte is received. See
CURLINFO_STARTTRANSFER_TIME_T(3)
CURLINFO_REDIRECT_TIME
Time taken for all redirect steps before the final transfer. See
CURLINFO_REDIRECT_TIME(3)
CURLINFO_REDIRECT_TIME_T
Time taken for all redirect steps before the final transfer. See
CURLINFO_REDIRECT_TIME_T(3)
CURLINFO_REDIRECT_COUNT
Total number of redirects that were followed. See CURLINFO_REDIRECT_COUNT(3)
CURLINFO_REDIRECT_URL
URL a redirect would take you to, had you enabled redirects. See
CURLINFO_REDIRECT_URL(3)
CURLINFO_SIZE_UPLOAD
(Deprecated) Number of bytes uploaded. See CURLINFO_SIZE_UPLOAD(3)
CURLINFO_SIZE_UPLOAD_T
Number of bytes uploaded. See CURLINFO_SIZE_UPLOAD_T(3)
CURLINFO_SIZE_DOWNLOAD
(Deprecated) Number of bytes downloaded. See CURLINFO_SIZE_DOWNLOAD(3)
CURLINFO_SIZE_DOWNLOAD_T
Number of bytes downloaded. See CURLINFO_SIZE_DOWNLOAD_T(3)
CURLINFO_SPEED_DOWNLOAD
(Deprecated) Average download speed. See CURLINFO_SPEED_DOWNLOAD(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. See CURLINFO_SPEED_UPLOAD_T(3)
CURLINFO_HEADER_SIZE
Number of bytes of all headers received. See CURLINFO_HEADER_SIZE(3)
CURLINFO_REQUEST_SIZE
Number of bytes sent in the issued HTTP requests. See CURLINFO_REQUEST_SIZE(3)
CURLINFO_SSL_VERIFYRESULT
Certificate verification result. See CURLINFO_SSL_VERIFYRESULT(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_SSL_ENGINES
A list of OpenSSL crypto engines. See CURLINFO_SSL_ENGINES(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_CONTENT_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. See CURLINFO_CONTENT_TYPE(3)
CURLINFO_RETRY_AFTER
The value from the from the Retry-After header. See CURLINFO_RETRY_AFTER(3)
CURLINFO_PRIVATE
User's private data pointer. See CURLINFO_PRIVATE(3)
CURLINFO_HTTPAUTH_AVAIL
Available HTTP authentication methods. See CURLINFO_HTTPAUTH_AVAIL(3)
CURLINFO_PROXYAUTH_AVAIL
Available HTTP proxy authentication methods. See CURLINFO_PROXYAUTH_AVAIL(3)
CURLINFO_OS_ERRNO
The errno from the last failure to connect. See CURLINFO_OS_ERRNO(3)
CURLINFO_NUM_CONNECTS
Number of new successful connections used for previous transfer. See
CURLINFO_NUM_CONNECTS(3)
CURLINFO_PRIMARY_IP
IP address of the last connection. See CURLINFO_PRIMARY_IP(3)
CURLINFO_PRIMARY_PORT
Port of the last connection. See CURLINFO_PRIMARY_PORT(3)
CURLINFO_LOCAL_IP
Local-end IP address of last connection. See CURLINFO_LOCAL_IP(3)
CURLINFO_LOCAL_PORT
Local-end port of last connection. See CURLINFO_LOCAL_PORT(3)
CURLINFO_COOKIELIST
List of all known cookies. See CURLINFO_COOKIELIST(3)
CURLINFO_LASTSOCKET
Last socket used. See CURLINFO_LASTSOCKET(3)
CURLINFO_ACTIVESOCKET
The session's active socket. See CURLINFO_ACTIVESOCKET(3)
CURLINFO_FTP_ENTRY_PATH
The entry path after logging in to an FTP server. See CURLINFO_FTP_ENTRY_PATH(3)
CURLINFO_CERTINFO
Certificate chain. See CURLINFO_CERTINFO(3)
CURLINFO_TLS_SSL_PTR
TLS session info that can be used for further processing. See
CURLINFO_TLS_SSL_PTR(3)
CURLINFO_TLS_SESSION
TLS session info that can be used for further processing. See
CURLINFO_TLS_SESSION(3). Deprecated option, use CURLINFO_TLS_SSL_PTR(3) instead!
CURLINFO_CONDITION_UNMET
Whether or not a time conditional was met or 304 HTTP response. See
CURLINFO_CONDITION_UNMET(3)
CURLINFO_RTSP_SESSION_ID
RTSP session ID. See CURLINFO_RTSP_SESSION_ID(3)
CURLINFO_RTSP_CLIENT_CSEQ
RTSP CSeq that will next be used. See CURLINFO_RTSP_CLIENT_CSEQ(3)
CURLINFO_RTSP_SERVER_CSEQ
RTSP CSeq that will next be expected. See CURLINFO_RTSP_SERVER_CSEQ(3)
CURLINFO_RTSP_CSEQ_RECV
RTSP CSeq last received. See CURLINFO_RTSP_CSEQ_RECV(3)
CURLINFO_PROTOCOL
The protocol used for the connection. (Added in 7.52.0) See CURLINFO_PROTOCOL(3)
CURLINFO_SCHEME
The scheme used for the connection. (Added in 7.52.0) See CURLINFO_SCHEME(3)
TIMES
An overview of the six time values available from curl_easy_getinfo()
curl_easy_perform()
|
|--NAMELOOKUP
|--|--CONNECT
|--|--|--APPCONNECT
|--|--|--|--PRETRANSFER
|--|--|--|--|--STARTTRANSFER
|--|--|--|--|--|--TOTAL
|--|--|--|--|--|--REDIRECT
NAMELOOKUP
CURLINFO_NAMELOOKUP_TIME and CURLINFO_NAMELOOKUP_TIME_T. The time it took from the
start until the name resolving was completed.
CONNECT
CURLINFO_CONNECT_TIME and CURLINFO_CONNECT_TIME_T. The time it took from the start
until the connect to the remote host (or proxy) was completed.
APPCONNECT
CURLINFO_APPCONNECT_TIME and CURLINFO_APPCONNECT_TIME_T. 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)
PRETRANSFER
CURLINFO_PRETRANSFER_TIME and 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 negotiations that are specific to the particular protocol(s)
involved.
STARTTRANSFER
CURLINFO_STARTTRANSFER_TIME and CURLINFO_STARTTRANSFER_TIME_T. The time it took
from the start until the first byte is received by libcurl.
TOTAL CURLINFO_TOTAL_TIME and CURLINFO_TOTAL_TIME_T. Total time of the previous request.
REDIRECT
CURLINFO_REDIRECT_TIME and 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.
EXAMPLE
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);
}
AVAILABILITY
Added in 7.4.1
RETURN VALUE
If the operation was successful, CURLE_OK is returned. Otherwise an appropriate error code
will be returned.
SEE ALSO
curl_easy_setopt(3)