libcurl Manual curl_easy_getinfo(3)
NAME
curl_easy_getinfo - extract information from a curl handle
SYNOPSIS
#include
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, apointer to a char *, a pointer to a struct curl_slist * or a
pointer to a double (as this documentation describes furtherdown). The data pointed-to will be filled in accordingly
and can be relied upon only if the function returnsCURLE_OK. Use this function AFTER a performed transfer if
you want to get transfer- oriented 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_URL
Pass a pointer to a char pointer to receive the last used effective URL.CURLINFO_RESPONSE_CODE
Pass a pointer to a long to receive the last received HTTP or FTP code. This option was known asCURLINFO_HTTP_CODE in libcurl 7.10.7 and earlier. This
will be zero if no server response code has been received. Note that a proxy's CONNECT response shouldbe read with CURLINFO_HTTP_CONNECTCODE and not this.
CURLINFO_HTTP_CONNECTCODE
Pass a pointer to a long to receive the last received proxy response code to a CONNECT request.CURLINFO_FILETIME
Pass a pointer to a long to receive the remote time of the retrieved document (in number of seconds since 1jan 1970 in the GMT/UTC time zone). If you get -1, it
can be because of many reasons (unknown, the server hides it or the server doesn't support the command that tells document time etc) and the time of the documentis unknown. Note that you must tell the server to col-
lect this information before the transfer is made, byusing the CURLOPT_FILETIME option to
curl_easy_setopt(3) or you will unconditionally get a
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-1 back. (Added in 7.5)
CURLINFO_TOTAL_TIME
Pass a pointer to a double to receive the total time in seconds for the previous transfer, including name resolving, TCP connect etc.CURLINFO_NAMELOOKUP_TIME
Pass a pointer to a double to receive the time, inseconds, it took from the start until the name resolv-
ing was completed.CURLINFO_CONNECT_TIME
Pass a pointer to a double to receive the time, in seconds, it took from the start until the connect to the remote host (or proxy) was completed.CURLINFO_APPCONNECT_TIME
Pass a pointer to a double to receive the time, inseconds, it took from the start until the SSL/SSH connect/handshake to the remote host was completed. This time is most often very near to the PRETRANSFER time, except for cases such as HTTP pippelining where the pretransfer time can be delayed due to waits in line for the pipeline and more. (Added in 7.19.0)
CURLINFO_PRETRANSFER_TIME
Pass a pointer to a double to receive the time, in seconds, it took from the start until the file transferis just about to begin. This includes all pre-transfer
commands and negotiations that are specific to the par-
ticular protocol(s) involved.CURLINFO_STARTTRANSFER_TIME
Pass a pointer to a double to receive the time, in seconds, it took from the start until the first byte is just about to be transferred. This includesCURLINFO_PRETRANSFER_TIME and also the time the server
needs to calculate the result.CURLINFO_REDIRECT_TIME
Pass a pointer to a double to receive the total time, in seconds, it took for all redirection steps include name lookup, connect, pretransfer and transfer beforefinal transaction was started. CURLINFO_REDIRECT_TIME
contains the complete execution time for multiple redirections. (Added in 7.9.7)CURLINFO_REDIRECT_COUNT
Pass a pointer to a long to receive the total number of redirections that were actually followed. (Added in 7.9.7) libcurl 7.19.4 Last change: 11 Feb 2009 2libcurl Manual curl_easy_getinfo(3)
CURLINFO_REDIRECT_URL
Pass a pointer to a char pointer to receive the URL a redirect would take you to if you would enableCURLOPT_FOLLOWLOCATION. This can come very handy if you
think using the built-in libcurl redirect logic isn't
good enough for you but you would still prefer to avoid implementing all the magic of figuring out the new URL. (Added in 7.18.2)CURLINFO_SIZE_UPLOAD
Pass a pointer to a double to receive the total amount of bytes that were uploaded.CURLINFO_SIZE_DOWNLOAD
Pass a pointer to a double to receive the total amount of bytes that were downloaded. The amount is only for the latest transfer and will be reset again for each new transfer.CURLINFO_SPEED_DOWNLOAD
Pass a pointer to a double to receive the average down-
load speed that curl measured for the complete down-
load. Measured in bytes/second.CURLINFO_SPEED_UPLOAD
Pass a pointer to a double to receive the average upload speed that curl measured for the complete upload. Measured in bytes/second.CURLINFO_HEADER_SIZE
Pass a pointer to a long to receive the total size of all the headers received. Measured in number of bytes.CURLINFO_REQUEST_SIZE
Pass a pointer to a long to receive the total size of the issued requests. This is so far only for HTTP requests. Note that this may be more than one request if FOLLOWLOCATION is true.CURLINFO_SSL_VERIFYRESULT
Pass a pointer to a long to receive the result of the certification verification that was requested (usingthe CURLOPT_SSL_VERIFYPEER option to
curl_easy_setopt(3)).
CURLINFO_SSL_ENGINES
Pass the address of a 'struct curl_slist *' to receive
a linked-list of OpenSSL crypto-engines supported. Note
that engines are normally implemented in separate dynamic libraries. Hence not all the returned enginesmay be available at run-time. NOTE: you must call
curl_slist_free_all(3) on the list pointer once you're
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done with it, as libcurl will not free the data for you. (Added in 7.12.3)CURLINFO_CONTENT_LENGTH_DOWNLOAD
Pass a pointer to a double to receive the content-
length of the download. This is the value read from theContent-Length: field. Since 7.19.4, this returns -1 if
the size isn't known.CURLINFO_CONTENT_LENGTH_UPLOAD
Pass a pointer to a double to receive the specifiedsize of the upload. Since 7.19.4, this returns -1 if
the size isn't known.CURLINFO_CONTENT_TYPE
Pass a pointer to a char pointer to receive thecontent-type of the downloaded object. This is the
value read from the Content-Type: field. If you get
NULL, it means that the server didn't send a validContent-Type header or that the protocol used doesn't
support this.CURLINFO_PRIVATE
Pass a pointer to a char pointer to receive the pointer to the private data associated with the curl handle(set with the CURLOPT_PRIVATE option to
curl_easy_setopt(3)). Please note that for internal
reasons, the value is returned as a char pointer, although effectively being a 'void *'. (Added in 7.10.3)CURLINFO_HTTPAUTH_AVAIL
Pass a pointer to a long to receive a bitmask indicat-
ing the authentication method(s) available. The meaningof the bits is explained in the CURLOPT_HTTPAUTH option
for curl_easy_setopt(3). (Added in 7.10.8)
CURLINFO_PROXYAUTH_AVAIL
Pass a pointer to a long to receive a bitmask indicat-
ing the authentication method(s) available for your proxy authentication. (Added in 7.10.8)CURLINFO_OS_ERRNO
Pass a pointer to a long to receive the errno variable from a connect failure. Note that the value is only set on failure, it is not reset upon a successfull operation. (Added in 7.12.2)CURLINFO_NUM_CONNECTS
Pass a pointer to a long to receive how many new con-
nections libcurl had to create to achieve the previous transfer (only the successful connects are counted). libcurl 7.19.4 Last change: 11 Feb 2009 4libcurl Manual curl_easy_getinfo(3)
Combined with CURLINFO_REDIRECT_COUNT you are able to
know how many times libcurl successfully reused exist-
ing connection(s) or not. See the Connection Optionsof curl_easy_setopt(3) to see how libcurl tries to make
persistent connections to save time. (Added in 7.12.3)CURLINFO_PRIMARY_IP
Pass a pointer to a char pointer to receive the pointerto a zero-terminated string holding the IP address of
the most recent connection done with this curl handle. This string may be IPv6 if that's enabled. Note thatyou get a pointer to a memory area that will be re-used
at next request so you need to copy the string if you want to keep the information. (Added in 7.19.0)CURLINFO_PRIMARY_PORT
Pass a pointer to a long to receive the destination port of the most recent connection done with this curl handle. (Added in 7.21.0)CURLINFO_LOCAL_IP
Pass a pointer to a char pointer to receive the pointerto a zero-terminated string holding the local (source)
IP address of the most recent connection done with this curl handle. This string may be IPv6 if that's enabled.The same restrictions apply as to CURLINFO_PRIMARY_IP.
(Added in 7.21.0)CURLINFO_LOCAL_PORT
Pass a pointer to a long to receive the local (source) port of the most recent connection done with this curl handle. (Added in 7.21.0)CURLINFO_COOKIELIST
Pass a pointer to a 'struct curl_slist *' to receive a
linked-list of all cookies cURL knows (expired ones,
too). Don't forget to curl_slist_free_all(3) the list
after it has been used. If there are no cookies (cook-
ies for the handle have not been enabled or simply nonehave been received) 'struct curl_slist *' will be set
to point to NULL. (Added in 7.14.1)CURLINFO_LASTSOCKET
Pass a pointer to a long to receive the last socket used by this curl session. If the socket is no longervalid, -1 is returned. When you finish working with the
socket, you must call curl_easy_cleanup() as usual and
let libcurl close the socket and cleanup other resources associated with the handle. This is typicallyused in combination with CURLOPT_CONNECT_ONLY. (Added
in 7.15.2) libcurl 7.19.4 Last change: 11 Feb 2009 5libcurl Manual curl_easy_getinfo(3)
NOTE: this API is not really working on win64, since the SOCKET type on win64 is 64 bit large while its 'long' is only 32 bits.CURLINFO_FTP_ENTRY_PATH
Pass a pointer to a char pointer to receive a pointer to a string holding the path of the entry path. That is the initial path libcurl ended up in when logging on to the remote FTP server. This stores a NULL as pointer if something is wrong. (Added in 7.15.4)CURLINFO_CERTINFO
Pass a pointer to a 'struct curl_certinfo *' and you'll
get it set to point to struct that holds a number of linked lists with info about the certificate chain,assuming you had CURLOPT_CERTINFO enabled when the pre-
vious request was done. The struct reports how many certs it found and then you can extract info for each of those certs by following the linked lists. The info chain is provided in a series of data in the format "name:content" where the content is for the specific named data. See also the certinfo.c example. NOTE: this option is only available in libcurl built with OpenSSL support. (Added in 7.19.1)CURLINFO_CONDITION_UNMET
Pass a pointer to a long to receive the number 1 if the condition provided in the previous request didn't match(see CURLOPT_TIMECONDITION). Alas, if this returns a 1
you know that the reason you didn't get data in return is because it didn't fulfill the condition. The long ths argument points to will get a zero stored if the condition instead was met. (Added in 7.19.4)CURLINFO_RTSP_SESSION_ID
Pass a pointer to a char pointer to receive a pointer to a string holding the most recent RTSP Session ID. Applications wishing to resume an RTSP session on another connection should retreive this info before closing the active connection.CURLINFO_RTSP_CLIENT_CSEQ
Pass a pointer to a long to receive the next CSeq that will be used by the application.CURLINFO_RTSP_SERVER_CSEQ
Pass a pointer to a long to receive the next server CSeq that will be expected by the application. (NOTE: listening for server initiated requests is currently unimplemented). libcurl 7.19.4 Last change: 11 Feb 2009 6libcurl Manual curl_easy_getinfo(3)
Applications wishing to resume an RTSP session on another connection should retreive this info before closing the active connection.CURLINFO_RTSP_CSEQ_RECV
Pass a pointer to a long to receive the most recently received CSeq from the server. If your applicationencounters a CURLE_RTSP_CSEQ_ERROR then you may wish to
troubleshoot and/or fix the CSeq mismatch by peeking at this value. TIMESAn 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. The time it took from the
start until the name resolving was completed. CONNECTCURLINFO_CONNECT_TIME. The time it took from the start
until the connect to the remote host (or proxy) was completed. APPCONNECTCURLINFO_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) PRETRANSFERCURLINFO_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 negotia-
tions that are specific to the particular protocol(s) involved. STARTTRANSFERCURLINFO_STARTTRANSFER_TIME. The time it took from the
start until the first byte is just about to be transferred. TOTALCURLINFO_TOTAL_TIME. Total time of the previous
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request. REDIRECTCURLINFO_REDIRECT_TIME. The time it took for all
redirection steps include name lookup, connect, pre-
transfer and transfer before final transaction was started. So, this is zero if no redirection took place. RETURN VALUEIf the operation was successful, CURLE_OK is returned. Oth-
erwise an appropriate error code will be returned.SEE ALSO
curl_easy_setopt(3)
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:_______________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE|
|____________________|__________________|_
| Availability | web/curl ||____________________|__________________|_
| Interface Stability| Uncommitted ||____________________|_________________|
NOTESSource for C-URL is available on http://opensolaris.org.
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