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
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)