Curl

Used as an argument passed to net.Curl.Easy#getInfo to retrieve information about each request.

• EFFECTIVE_URL Pass a pointer to a char pointer to receive the last used effective URL.

• RESPONSE_CODE Pass a pointer to a long to receive the last received HTTP, FTP or SMTP response code. This option was previously known as CURLINFO_HTTP_CODE in libcurl 7.10.7 and earlier. The value 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.

• HTTP_CONNECTCODE Pass a pointer to a long to receive the last received proxy response code to a CONNECT request.

• 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 (un‐ known, the server hides it or the server doesn't support 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 informa‐ tion before the transfer is made, by using the CURLOPT_FILETIME(3) option to curl_easy_setopt(3) or you will unconditionally get a -1 back. (Added in 7.5)

• 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.

• NAMELOOKUP_TIME Pass a pointer to a double to receive the time, in seconds, it took from the start until the name resolving was completed.

• 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.

• APPCONNECT_TIME Pass a pointer to a double to receive the time, in seconds, 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 PRE‐ TRANSFER time, except for cases such as HTTP pipelining where the pretransfer time can be delayed due to waits in line for the pipeline and more. (Added in 7.19.0)

• 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. It does not involve the sending of the protocol- specific request that triggers a transfer.

• STARTTRANSFER_TIME Pass a pointer to a double to receive the time, in seconds, it took from the start until the first byte is received by libcurl. This includes CURLINFO_PRETRANSFER_TIME and also the time the server needs to calculate the result.

• 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 before final transaction was started. * REDIRECT_TIME contains the complete execution time for multiple redirections. (Added in 7.9.7)

• REDIRECT_COUNT Pass a pointer to a long to receive the total number of redirections that were actually followed. (Added in 7.9.7)

• 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(3). This can come very handy if you think using the built-in libcurl redi‐ rect 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)

• SIZE_UPLOAD Pass a pointer to a double to receive the total amount of bytes that were uploaded.

• 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. This counts actual pay‐ load data, what's also commonly called body. All meta and header data are excluded and will not be counted in this number.

• 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.

• 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.

• HEADER_SIZE Pass a pointer to a long to receive the total size of all the headers received. Measured in number of bytes.

• 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.

• SSL_VERIFYRESULT Pass a pointer to a long to receive the result of the certification verification that was requested (using the CURLOPT_SSL_VERIFYPEER(3) option to curl_easy_setopt(3)).

• 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)

• 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.

• 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.

• 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.

• 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(3) option for curl_easy_setopt(3). (Added in 7.10.8)

• PROXYAUTH_AVAIL Pass a pointer to a long to receive a bitmask indicating the authentication method(s) available for your proxy authentication. (Added in 7.10.8)

• 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_REDIRECT_COUNT you are able to know how many times libcurl successfully reused existing connection(s) or not. See the Connection Options of curl_easy_setopt(3) to see how libcurl tries to make persistent connec‐ tions to save time. (Added in 7.12.3)

• PRIMARY_IP Pass a pointer to a char pointer to receive the pointer to 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 that you 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)

• 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)

• LOCAL_IP Pass a pointer to a char pointer to receive the pointer to 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)

• 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)

• 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)

• 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(3)). 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)