curl_easy_getinfo
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- 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 effec-
tive URL.
CURLINFO_RESPONSE_CODE
Pass a pointer to a long to receive the last received HTTP or
FTP code. This option was known as CURLINFO_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 should
be 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 1 jan 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 sup-
port the command that tells document time etc) and the time of
the document is unknown. Note that you must tell the server to
collect this information before the transfer is made, by using
the CURLOPT_FILETIME option to curl_easy_setopt(3) or you will
unconditionally get a -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
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 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
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 includes CURLINFO_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 sec-
onds, it took for all redirection steps include name lookup,
connect, pretransfer and transfer before final 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 redirec-
tions that were actually followed. (Added in 7.9.7)
CURLINFO_REDIRECT_URL
Pass a pointer to a char pointer to receive the URL a redirect
would take you to if you would enable CURLOPT_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 download speed
that curl measured for the complete download. 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.
IFYPEER 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 engines may be available at run-time. NOTE: you
must call curl_slist_free_all(3) on the list pointer once you're
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 the Content-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 specified size 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 the content-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 valid Content-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 CUR-
LOPT_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 indicating the
authentication method(s) available. The meaning of 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 indicating the
authentication method(s) available for your proxy authentica-
tion. (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 connections
libcurl had to create to achieve the previous transfer (only the
successful connects are counted). Combined with CURLINFO_REDI-
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 (cookies for the handle have not been
enabled or simply none have 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 longer valid, -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
typically used in combination with CURLOPT_CONNECT_ONLY. (Added
in 7.15.2)
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_CERT-
INFO enabled when the previous 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:con-
tent" 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 condi-
tion provided in the previous request didn't match (see CUR-
LOPT_TIMECONDITION). Alas, if this returns a 1 you know that the
reason you didn't get data in return is because it didn't ful-
fill the condition. The long ths argument points to will get a
zero stored if the condition instead was met. (Added in 7.19.4)
TIMES
An overview of the six time values available from curl_easy_getinfo()
curl_easy_perform()
|
|--NAMELOOKUP
|--|--CONNECT
|--|--|--APPCONNECT
|--|--|--|--PRETRANSFER
APPCONNECT
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)
PRETRANSFER
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 par-
ticular protocol(s) involved.
STARTTRANSFER
CURLINFO_STARTTRANSFER_TIME. The time it took from the start
until the first byte is just about to be transferred.
TOTAL CURLINFO_TOTAL_TIME. Total time of the previous request.
REDIRECT
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 re-
direction took place.
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)
libcurl 7.19.4 11 Feb 2009 curl_easy_getinfo(3)
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