curl_easy_getinfo - extract information from a curl handle
CURLcode curl_easy_getinfo(CURL *curl, CURLINFO info, ... );
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.
The following information can be extracted:
Last used URL. See CURLINFO_EFFECTIVE_URL
Last received response code. See CURLINFO_RESPONSE_CODE
Last proxy CONNECT response code. See CURLINFO_HTTP_CONNECTCODE
The http version used in the connection. See CURLINFO_HTTP_VERSION
Remote time of the retrieved document. See CURLINFO_FILETIME
Total time of previous transfer. See CURLINFO_TOTAL_TIME
Time from start until name resolving completed. See CURLINFO_NAMELOOKUP_TIME
Time from start until remote host or proxy completed. See CURLINFO_CONNECT_TIME
Time from start until SSL/SSH handshake completed. See CURLINFO_APPCONNECT_TIME
Time from start until just before the transfer begins. See CURLINFO_PRETRANSFER_TIME
Time from start until just when the first byte is received. See CURLINFO_STARTTRANSFER_TIME
Time taken for all redirect steps before the final transfer. See CURLINFO_REDIRECT_TIME
Total number of redirects that were followed. See CURLINFO_REDIRECT_COUNT
URL a redirect would take you to, had you enabled redirects. See CURLINFO_REDIRECT_URL
Number of bytes uploaded. See CURLINFO_SIZE_UPLOAD
Number of bytes downloaded. See CURLINFO_SIZE_DOWNLOAD
Average download speed. See CURLINFO_SPEED_DOWNLOAD
Average upload speed. See CURLINFO_SPEED_UPLOAD
Number of bytes of all headers received. See CURLINFO_HEADER_SIZE
Number of bytes sent in the issued HTTP requests. See CURLINFO_REQUEST_SIZE
Certificate verification result. See CURLINFO_SSL_VERIFYRESULT
A list of OpenSSL crypto engines. See CURLINFO_SSL_ENGINES
Content length from the Content-Length header. See CURLINFO_CONTENT_LENGTH_DOWNLOAD
Upload size. See CURLINFO_CONTENT_LENGTH_UPLOAD
Content type from the Content-Type header. See CURLINFO_CONTENT_TYPE
User's private data pointer. See CURLINFO_PRIVATE
Available HTTP authentication methods. See CURLINFO_HTTPAUTH_AVAIL
Available HTTP proxy authentication methods. See CURLINFO_PROXYAUTH_AVAIL
The errno from the last failure to connect. See CURLINFO_OS_ERRNO
Number of new successful connections used for previous transfer. See CURLINFO_NUM_CONNECTS
IP address of the last connection. See CURLINFO_PRIMARY_IP
Port of the last connection. See CURLINFO_PRIMARY_PORT
Local-end IP address of last connection. See CURLINFO_LOCAL_IP
Local-end port of last connection. See CURLINFO_LOCAL_PORT
List of all known cookies. See CURLINFO_COOKIELIST
Last socket used. See CURLINFO_LASTSOCKET
The session's active socket. See CURLINFO_ACTIVESOCKET
The entry path after logging in to an FTP server. See CURLINFO_FTP_ENTRY_PATH
Certificate chain. See CURLINFO_CERTINFO
TLS session info that can be used for further processing. See CURLINFO_TLS_SSL_PTR
Whether or not a time conditional was met. See CURLINFO_CONDITION_UNMET
RTSP session ID. See CURLINFO_RTSP_SESSION_ID
RTSP CSeq that will next be used. See CURLINFO_RTSP_CLIENT_CSEQ
RTSP CSeq that will next be expected. See CURLINFO_RTSP_SERVER_CSEQ
RTSP CSeq last received. See CURLINFO_RTSP_CSEQ_RECV
An overview of the six time values available from curl_easy_getinfo() curl_easy_perform() | |--NAMELOOKUP |--|--CONNECT |--|--|--APPCONNECT |--|--|--|--PRETRANSFER |--|--|--|--|--STARTTRANSFER |--|--|--|--|--|--TOTAL |--|--|--|--|--|--REDIRECT
CURLINFO_NAMELOOKUP_TIME. The time it took from the start until the name resolving was completed.
CURLINFO_CONNECT_TIME. The time it took from the start until the connect to the remote host (or proxy) was completed.
CURLINFO_APPCONNECT_TIME. The time it took from the start until the SSL connect/handshake with the remote host was completed. (Added in in 7.19.0)
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 negotiations that are specific to the particular protocol(s) involved.
CURLINFO_STARTTRANSFER_TIME. The time it took from the start until the first byte is received by libcurl.
CURLINFO_TOTAL_TIME. Total time of the previous request.
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.
If the operation was successful, CURLE_OK is returned. Otherwise an appropriate error code will be returned.
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