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curl

Properties


curl.version
The libcurl version.

Functions


curl.time(date_string: string)
Returns the number of seconds since the Epoch, January 1st 1970 00:00:00 in the UTC time zone, for the date and time that the date_string parameter specifies.

PARSING DATES AND TIMES

A “date” is a string containing several items separated by whitespace. The order of the items is immaterial. A date string may contain many flavors of items:

  • Calendar date Can be specified several ways. Month names can only be three-letter english abbreviations, numbers can be zero-prefixed and the year may use 2 or 4 digits.

    Examples: 06 Nov 1994, 06-Nov-94 and Nov-94 6.

  • Time of the day This string specifies the time on a given day. You must specify it with 6 digits with two colons: HH:MM:SS. To not include the time in a date string, will make the function assume 00:00:00.

    Example: 18:19:21.

  • Time zone Specifies international time zone. There are a few acronyms supported, but in general you should instead use the specific relative time compared to UTC. Supported formats include: -1200, MST, +0100.

  • Day of the week items Specifies a day of the week. Days of the week may be spelled out in full (using english): Sunday, Monday, etc or they may be abbreviated to their first three letters. This is usually not info that adds anything.

  • Pure numbers If a decimal number of the form YYYYMMDD appears, then YYYY is read as the year, MM as the month number and DD as the day of the month, for the specified calendar date.

EXAMPLES

Sun, 06 Nov 1994 08:49:37 GMT
Sunday, 06-Nov-94 08:49:37 GMT
Sun Nov  6 08:49:37 1994
06 Nov 1994 08:49:37 GMT
06-Nov-94 08:49:37 GMT
Nov  6 08:49:37 1994
06 Nov 1994 08:49:37
06-Nov-94 08:49:37
1994 Nov 6 08:49:37
GMT 08:49:37 06-Nov-94 Sunday
94 6 Nov 08:49:37
1994 Nov 6
06-Nov-94
Sun Nov 6 94
1994.Nov.6
Sun/Nov/6/94/GMT
Sun, 06 Nov 1994 08:49:37 CET
06 Nov 1994 08:49:37 EST
Sun, 12 Sep 2004 15:05:58 -0700
Sat, 11 Sep 2004 21:32:11 +0200
20040912 15:05:58 -0700
20040911 +0200

STANDARDS

This parser was written to handle date formats specified in RFC 822 (including the update in RFC 1123) using time zone name or time zone delta and RFC 850 (obsoleted by RFC 1036) and ANSI C’s asctime() format. These formats are the only ones RFC 7231 says HTTP applications may use.

return number
static

Classes


class Info


cURL request and response informations for get_info()

class Info properties


static Info.EFFECTIVE_URL
Gets the last used effective URL. If follow redirects is enabled, it may very well not be the same value you set in the original request.
static
static Info.RESPONSE_CODE
The last received HTTP, FTP or SMTP response code. The value will be zero if no server response code has been received.
static
  • A proxy’s CONNECT response should be read with HTTP_CONNECTCODE and not this.
static Info.TOTAL_TIME
The total time in seconds for the previous transfer, including name resolving, TCP connect etc. The value represents the time in seconds, including fractions.
static
  • When a redirect is followed, the time from each request is added together.
static Info.NAMELOOKUP_TIME
The total time in seconds from the start until the name resolving was completed.
static
  • When a redirect is followed, the time from each request is added together.
static Info.CONNECT_TIME
The total time in seconds from the start until the connection to the remote host (or proxy) was completed.
static
  • When a redirect is followed, the time from each request is added together.
static Info.PRETRANSFER_TIME
The time, in seconds, it took from the start until a file transfer is just about to begin.

This time-stamp includes all pre-transfer commands and negotiations that are specific to the particular protocol(s) involved. It includes the sending of the protocol- specific protocol instructions that triggers a transfer.

static
  • When a redirect is followed, the time from each request is added together.
static Info.SIZE_UPLOAD
The total amount of bytes that were uploaded.
static
  • SIZE_UPLOAD_T might return a more sensible data.
static Info.SIZE_UPLOAD_T
The total amount of bytes that were uploaded.
static
static Info.SIZE_DOWNLOAD
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 payload data, what’s also commonly called body. All meta and header data are excluded and will not be counted in this number.
static
  • SIZE_DOWNLOAD_T might return a more sensible data.
static Info.SIZE_DOWNLOAD_T
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 payload data, what’s also commonly called body. All meta and header data are excluded and will not be counted in this number.
static Info.SPEED_DOWNLOAD
The average download speed that curl measured for the complete download. Measured in bytes/second.
static
  • SPEED_DOWNLOAD_T might return a more sensible data.
static Info.SPEED_DOWNLOAD_T
The average download speed that curl measured for the complete download. Measured in bytes/second.
static Info.SPEED_UPLOAD
The average upload speed that curl measured for the complete upload. Measured in bytes/second.
static
  • CURLINFO_SPEED_UPLOAD_T might return a more sensible data.
static Info.SPEED_UPLOAD_T
The average upload speed that curl measured for the complete upload. Measured in bytes/second.
static
static Info.HEADER_SIZE
The total size of all the headers received. Measured in number of bytes.
static
static Info.REQUEST_SIZE
The total size of the issued requests. This is so far only for HTTP requests.
static
  • This may be more than one request if Options.FOLLOWLOCATION is enabled.
static Info.SSL_VERIFYRESULT
The result of the server SSL certificate verification that was requested (using the Options.SSL_VERIFYPEER option).
static
  • 0 is a positive result. Non-zero is an error.
static Info.FILETIME
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 (it might be unknown, the server might hide it or the server doesn’t support the command that tells document time etc) and the time of the document is unknown.

You MUST to collect this information before the transfer is made, by using the Options.FILETIME option to set_option() or you will unconditionally get a -1 back.

static

Consider using FILETIME_T to be able to extract dates beyond the year 2038 on systems using 32 bit longs.

static Info.FILETIME_T
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 (it might be unknown, the server might hide it or the server doesn’t support the command that tells document time etc) and the time of the document is unknown.

You MUST to collect this information before the transfer is made, by using the Options.FILETIME option to set_option() or you will unconditionally get a -1 back.

static

This option is an alternative to FILETIME to allow systems with 32 bit long variables to extract dates outside of the 32bit timestamp range.

static Info.CONTENT_LENGTH_DOWNLOAD
The content-length of the download. This is the value read from the Content-Length: field. It is -1 if the size isn’t known.
static
  • CONTENT_LENGTH_DOWNLOAD_T might return a more sensible data.
static Info.CONTENT_LENGTH_DOWNLOAD_T
The content-length of the download. This is the value read from the Content-Length: field. It is -1 if the size isn’t known.
static
static Info.CONTENT_LENGTH_UPLOAD
The content-length of the upload. It is -1 if the size isn’t known.
static
  • CONTENT_LENGTH_UPLOAD_T might return a more sensible data.
static Info.CONTENT_LENGTH_UPLOAD_T
The content-length of the upload. It is -1 if the size isn’t known.
static
static Info.STARTTRANSFER_TIME
The time, in seconds, it took from the start until the first byte is received by curl. This includes PRETRANSFER_TIME and also the time the server needs to calculate the result.
static
  • When a redirect is followed, the time from each request is added together.
static Info.CONTENT_TYPE
The content-type of the downloaded object. This is the value read from the Content-Type: field. If you get nil, it means that the server didn’t send a valid Content-Type header or that the protocol used doesn’t support this.
static
static Info.REDIRECT_TIME
The total time, in seconds, it took for all redirection steps include name lookup, connect, pretransfer and transfer before final transaction was started.
static
  • It contains the complete execution time for multiple redirections.
static Info.REDIRECT_COUNT
The total number of redirections that were actually followed.
static
static Info.HTTP_CONNECTCODE
The last received HTTP proxy response code to a CONNECT request. The returned value will be zero if no such response code was available.
static
static Info.HTTPAUTH_AVAIL
A bitmask indicating the authentication method(s) available according to the previous response.
static
static Info.PROXYAUTH_AVAIL
A bitmask indicating the authentication method(s) available according to the previous response.
static
static Info.OS_ERRNO
The errno variable from a connect failure. Note that the value is only set on failure, it is not reset upon a successful operation. The number is OS and system specific.
static
static Info.NUM_CONNECTS
How many new connections curl had to create to achieve the previous transfer (only the successful connects are counted). Combined with REDIRECT_COUNT you are able to know how many times curl successfully reused existing connection(s) or not.
static
static Info.COOKIELIST
A list of all cookies curl knows (expired ones, too). If there are no cookies, an empty list is returned.
static

Cookies that were imported in the Set-Cookie format without a domain name may not exported by this option.

static Info.FTP_ENTRY_PATH
A string holding the path of the entry path. That is the initial path curl ended up in when logging on to the remote FTP server. This value is nil if something is wrong.
static
static Info.REDIRECT_URL
The URL a redirect would take you to if you would enable FOLLOWLOCATION. This can come very handy if you think using the built-in curl 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.
static
static Info.PRIMARY_IP
A string holding the IP address of the most recent connection done with this curl handle.
static
  • This string may be IPv6 when that is enabled.
static Info.APPCONNECT_TIME
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 PRETRANSFER_TIME 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.
static
  • When a redirect is followed, the time from each request is added together.
static Info.CERTINFO
Lists with info about the certificate chain, assuming you had Options.CERTINFO enabled when the request was made. Information in each entry of the list is provided in a series of data in the format “name:content” where the content is for the specific named data.
static
static Info.CONDITION_UNMET
The number 1 if the condition provided in the previous request didn’t match (see Options.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. This value will be zero if the condition was met. This can also return 1 if the server responded with a 304 HTTP status code, for example after sending a custom “If-Match-*” header.
static
static Info.RTSP_SESSION_ID
A string holding the most recent RTSP Session ID.
static

Applications wishing to resume an RTSP session on another connection should retrieve this info before closing the active connection.

static Info.RTSP_CLIENT_CSEQ
The next CSeq that will be used by the application.
static
static Info.RTSP_SERVER_CSEQ
The next CSeq that is expected by the application.
static

Applications wishing to resume an RTSP session on another connection should retrieve this info before closing the active connection.

static Info.RTSP_CSEQ_RECV
The most recently received CSeq from the server.
static
static Info.PRIMARY_PORT
The destination port of the most recent connection done with the curl instance.
static
static Info.LOCAL_IP
A string holding the IP address of the local end of most recent connection done with the curl instance.
static
  • This string may be IPv6 when that is enabled.
static Info.LOCAL_PORT
The local port number of the most recent connection done with the curl instance.
static
static Info.HTTP_VERSION
The HTTP version used in the last http connection.
static
static Info.PROXY_SSL_VERIFYRESULT
The result of the certificate verification that was requested (using the Options.PROXY_SSL_VERIFYPEER option.
static
  • This is only used for HTTPS proxies.
static Info.PROTOCOL
The protocol used in the last request.
static
static Info.SCHEME
A string holding the URL scheme used for the most recent connection done with this curl instance.
static
static Info.TOTAL_TIME_T
The total time in microseconds for the previous transfer, including name resolving, TCP connect etc.
static
  • When a redirect is followed, the time from each request is added together.
static Info.NAMELOOKUP_TIME_T
The total time in microseconds from the start until the name resolving was completed.
static
  • When a redirect is followed, the time from each request is added together.
static Info.CONNECT_TIME_T
The total time in microseconds from the start until the connection to the remote host (or proxy) was completed.
static
  • When a redirect is followed, the time from each request is added together.
static Info.PRETRANSFER_TIME_T
The total time in microseconds 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.
static
  • When a redirect is followed, the time from each request is added together.
static Info.STARTTRANSFER_TIME_T
The total time in microseconds from the start until the first byte is received by curl. This includes PRETRANSFER_TIME_T and also the time the server needs to calculate the result.
static
  • When a redirect is followed, the time from each request is added together.
static Info.REDIRECT_TIME_T
The total time in microseconds it took for all redirection steps include name lookup, connect, pretransfer and transfer before final transaction was started. It contains the complete execution time for multiple redirections.
static
  • When a redirect is followed, the time from each request is added together.
static Info.APPCONNECT_TIME_T
The total time in microseconds 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_T 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.
static
  • When a redirect is followed, the time from each request is added together.
static Info.RETRY_AFTER
The number of seconds the HTTP server suggests the client should wait until the next request is issued.
static
  • The information from the “Retry-After:” header.

While the HTTP header might contain a fixed date string, the RETRY_AFTER will always return number of seconds to wait - or zero if there was no header or the header couldn’t be parsed.

class CurlMime


cURL Mime object for multipart-data forms and POST requests.

class CurlMime methods


add(name: string, value: any)
Adds a new mime part with the given name and value.
add_file(name: string, file: string)
Adds a new mime part with the given name and file.
get_pointer()
Returns the raw pointer object to the underlying libcurl mime implementation.

class CurlList


cURL list interface.

class CurlList methods


CurlList(items: list)
constrctor
close()
Close and disposes the pointer to the list
get_pointer()
Returns the raw pointer object to the underlying libcurl list implementation.

class Curl


cURL class

class Curl methods


Curl()
constructor
set_option(option: Option, value: any)
This function is used to tell curl how to behave. By setting the appropriate options, the application can change curl’s behavior.
All options are set with an option followed by a parameter. That parameter can be a number, boolean, string, or an object pointer, depending on what the specific option expects. Read this cURL manual carefully as bad input values may cause curl to behave badly! You can only set one option in each function call. A typical application uses many set_option() calls in the setup phase.

Options set with this function call are valid for all forthcoming transfers performed using this instance. The options are not in any way reset between transfers, so if you want subsequent transfers with different options, you must change them between the transfers. You can optionally reset all options back to internal default with reset().

  • Strings passed to curl as arguments, must not exceed 8MB in size.
  • The order in which the options are set does not matter.
return boolean
get_info(info: Info)
Requests internal information from the curl session with this function. Use this function AFTER performing a transfer if you want to get transfer related data.
return string | number | list
escape(str: string)
This function converts the given input string to a URL encoded string and returns that as a new allocated string. All input characters that are not a-z, A-Z, 0-9, ‘-‘, ‘.’, ‘_’ or ‘~’ are converted to their “URL escaped” version (%NN where NN is a two-digit hexadecimal number).
return string
  • This function does not accept a strings longer than 8 MB.
unescape(str: string)
This function converts the given URL encoded input string to a “plain string” and returns that in an allocated memory area. All input characters that are URL encoded (%XX where XX is a two-digit hexadecimal number) are converted to their decoded versions.
return string
send()
Performs the entire request in a blocking manner and returns when done, or if it failed. It returns a dictionary containing the headers and body key.
return dict

You must never call this function simultaneously from two places using the same instance. Let the function return first before invoking it another time.

reset()
Re-initializes the instace to the default values. This puts back the instance to the same state as it was in when it was just created.

It keeps live connections, the Session ID cache, the DNS cache, the cookies , the shares or the alt-svc cache.

close()
Closes the current Curl instance.

This might close all connections this instance has used and possibly has kept open until now - unless it was attached to a multi handle while doing the transfers. Don’t call this function if you intend to transfer more files, re-using Curl instances is a key to good performance.

  • Calling a function on the instance after this function has been called is illegal
get_pointer()
Returns the raw pointer object to the underlying libcurl.

class Auth


Auth values for Options.HTTPAUTH and Options.PROXYAUTH

class Auth properties


static Auth.NONE
No HTTP authentication
static
static Auth.BASIC
HTTP Basic authentication (default)
static
static Auth.DIGEST
HTTP Digest authentication
static
static Auth.NEGOTIATE
HTTP Negotiate (SPNEGO) authentication
static
static Auth.GSSNEGOTIATE
Alias for CURLAUTH_NEGOTIATE (deprecated)
static
static Auth.NTLM
HTTP NTLM authentication
static
static Auth.DIGEST_IE
HTTP Digest authentication with IE flavour
static
static Auth.NTLM_WB
HTTP NTLM authentication delegated to winbind helper
static
static Auth.BEARER
HTTP Bearer token authentication
static
static Auth.ONLY
Use together with a single other type to force no authentication or just that single type.
static
static Auth.ANY
All fine types set
static
static Auth.ANYSAFE
All fine types except Basic
static
static Auth.SSH_ANY
All types of SSH authentication supported by the server
static
static Auth.SSH_NONE
No SSH allowed
static
static Auth.SSH_PUBLICKEY
Public/private key files for SSH authentication.
static
static Auth.SSH_PASSWORD
Password for SSH authentication.
static
static Auth.SSH_HOST
Host key files for SSH authentication.
static
static Auth.SSH_KEYBOARD
Keyboard interactive SSH authentication.
static
static Auth.SSH_AGENT
Agent (ssh-agent, pageant, etc.) for SSH authentication.
static
static Auth.SSH_GSSAPI
gssapi (kerberos, etc.) for SSH authentication.
static
static Auth.SSH_DEFAULT
The default SSH authentication (same as ANY).
static

class FileType


cURL file types

class FileType properties


static FileType.FILE
File
static
static FileType.DIRECTORY
Directory
static
Symbolic Link
static
static FileType.DEVICE_CHAR
static
static FileType.NAMEDPIPE
Named Pipe
static
static FileType.SOCKET
Socket
static
static FileType.DOOR
Door. This is only possible on Sun Solaris now
static

class Option


cURL request options for set_option()

class Option properties


static Option.URL
The full URL to get/put
static
static Option.PORT
Port number to connect to, if other than default.
static
static Option.PROXY
Name of proxy to use.
static
static Option.USERPWD
“user:password;options” to use when fetching.
static
static Option.PROXYUSERPWD
“user:password” to use with proxy.
static
static Option.RANGE
Range to get, specified as an ASCII string.
static
static Option.ERRORBUFFER
Buffer to receive error messages in, must be at least CURL_ERROR_SIZE bytes big.
static
static Option.TIMEOUT
Time-out the read operation after this amount of seconds
static
static Option.INFILESIZE
If the CURLOPT_INFILE is used, this can be used to inform libcurl about how large the file being sent really is. That allows better error checking and better verifies that the upload was successful. -1 means unknown size.

For large file support, there is also a _LARGE version of the key which takes an off_t type, allowing platforms with larger off_t sizes to handle larger files. See below for INFILESIZE_LARGE.

static
static Option.POSTFIELDS
POST static input fields.
static
static Option.REFERER
Set the referrer page (needed by some CGIs)
static
static Option.FTPPORT
Set the FTP PORT string (interface name, named or numerical IP address) Use i.e ‘-‘ to use default address. <div class="cite">static </div>
static Option.USERAGENT
Set the User-Agent string (examined by some CGIs)
static
static Option.LOW_SPEED_LIMIT
Set the “low speed limit”
static
static Option.LOW_SPEED_TIME
Set the “low speed time”
static
static Option.RESUME_FROM
Set the continuation offset.

Note there is also a _LARGE version of this key which uses off_t types, allowing for large file offsets on platforms which use larger-than-32-bit off_t’s. Look below for RESUME_FROM_LARGE.

static
Set cookie in request:
static
static Option.HTTPHEADER
This points to a linked list of headers, struct curl_slist kind. This list is also used for RTSP (in spite of its name)
static
static Option.HTTPPOST
This points to a linked list of post entries, struct curl_httppost
static
static Option.SSLCERT
name of the file keeping your private SSL-certificate
static
static Option.KEYPASSWD
password for the SSL or SSH private key
static
static Option.CRLF
send TYPE parameter?
static
static Option.QUOTE
send linked-list of QUOTE commands
static
static Option.COOKIEFILE
point to a file to read the initial cookies from, also enables “cookie awareness”
static
static Option.SSLVERSION
What version to specifically try to use. See CURL_SSLVERSION defines below.
static
static Option.TIMECONDITION
What kind of HTTP time condition to use, see defines
static
static Option.TIMEVALUE
Time to use with the above condition. Specified in number of seconds since 1 Jan 1970
static
static Option.CUSTOMREQUEST
Custom request, for customizing the get command like HTTP: DELETE, TRACE and others FTP: to use a different list command
static
static Option.STDERR
FILE handle to use instead of stderr
static
static Option.POSTQUOTE
send linked-list of post-transfer QUOTE commands
static
static Option.VERBOSE
talk a lot
static
static Option.HEADER
throw the header out too
static
static Option.NOPROGRESS
shut off the progress meter
static
static Option.NOBODY
use HEAD to get http document
static
static Option.FAILONERROR
no output on http error codes >= 400
static
static Option.UPLOAD
this is an upload
static
static Option.POST
HTTP POST method
static
static Option.DIRLISTONLY
bare names when listing directories
static
static Option.APPEND
Append instead of overwrite on upload!
static
static Option.NETRC
Specify whether to read the user+password from the .netrc or the URL. This must be one of the CURL_NETRC_* enums below.
static
static Option.FOLLOWLOCATION
use Location: Luke!
static
static Option.TRANSFERTEXT
transfer data in text/ASCII format
static
static Option.PUT
HTTP PUT
static
static Option.AUTOREFERER
We want the referrer field set automatically when following locations
static
static Option.PROXYPORT
Port of the proxy, can be set in the proxy string as well with: “[host]:[port]”
static
static Option.POSTFIELDSIZE
size of the POST input data, if strlen() is not good to use
static
static Option.HTTPPROXYTUNNEL
tunnel non-http operations through a HTTP proxy
static
static Option.INTERFACE
Set the interface string to use as outgoing network interface
static
static Option.KRBLEVEL
Set the krb4/5 security level, this also enables krb4/5 awareness. This is a string, ‘clear’, ‘safe’, ‘confidential’ or ‘private’. If the string is set but doesn’t match one of these, ‘private’ will be used.
static
static Option.SSL_VERIFYPEER
Set if we should verify the peer in ssl handshake, set 1 to verify.
static
static Option.CAINFO
The CApath or CAfile used to validate the peer certificate this option is used only if SSL_VERIFYPEER is true
static
static Option.MAXREDIRS
Maximum number of http redirects to follow
static
static Option.FILETIME
Pass a long set to 1 to get the date of the requested document (if possible)! Pass a zero to shut it off.
static
static Option.TELNETOPTIONS
This points to a linked list of telnet options
static
static Option.MAXCONNECTS
Max amount of cached alive connections
static
static Option.FRESH_CONNECT
Set to explicitly use a new connection for the upcoming transfer. Do not use this unless you’re absolutely sure of this, as it makes the operation slower and is less friendly for the network.
static
static Option.FORBID_REUSE
Set to explicitly forbid the upcoming transfer’s connection to be re-used when done. Do not use this unless you’re absolutely sure of this, as it makes the operation slower and is less friendly for the network.
static
static Option.RANDOM_FILE
Set to a file name that contains random data for libcurl to use to seed the random engine when doing SSL connects.
static
static Option.EGDSOCKET
Set to the Entropy Gathering Daemon socket pathname
static
static Option.CONNECTTIMEOUT
Time-out connect operations after this amount of seconds, if connects are OK within this time, then fine… This only aborts the connect phase.
static
static Option.HTTPGET
Set this to force the HTTP request to get back to GET. Only really usable if POST, PUT or a custom request have been used first.
static
static Option.SSL_VERIFYHOST
Set if we should verify the Common name from the peer certificate in ssl handshake, set 1 to check existence, 2 to ensure that it matches the provided hostname.
static
static Option.COOKIEJAR
Specify which file name to write all known cookies in after completed operation. Set file name to “-“ (dash) to make it go to stdout.
static
static Option.SSL_CIPHER_LIST
Specify which SSL ciphers to use
static
static Option.HTTP_VERSION
Specify which HTTP version to use! This must be set to one of the CURL_HTTP_VERSION* enums set below.
static
static Option.FTP_USE_EPSV
Specifically switch on or off the FTP engine’s use of the EPSV command. By default, that one will always be attempted before the more traditional PASV command.
static
static Option.SSLCERTTYPE
type of the file keeping your SSL-certificate (“DER”, “PEM”, “ENG”)
static
static Option.SSLKEY
name of the file keeping your private SSL-key
static
static Option.SSLKEYTYPE
type of the file keeping your private SSL-key (“DER”, “PEM”, “ENG”)
static
static Option.SSLENGINE
crypto engine for the SSL-sub system
static
static Option.SSLENGINE_DEFAULT
set the crypto engine for the SSL-sub system as default the param has no meaning…
static
static Option.DNS_USE_GLOBAL_CACHE
DEPRECATED, do not use!
static
static Option.DNS_CACHE_TIMEOUT
DNS cache timeout
static
static Option.PREQUOTE
send linked-list of pre-transfer QUOTE commands
static
static Option.COOKIESESSION
mark this as start of a cookie session
static
static Option.CAPATH
The CApath directory used to validate the peer certificate this option is used only if SSL_VERIFYPEER is true
static
static Option.BUFFERSIZE
Instruct libcurl to use a smaller receive buffer
static
static Option.NOSIGNAL
Instruct libcurl to not use any signal/alarm handlers, even when using timeouts. This option is useful for multi-threaded applications. See libcurl-the-guide for more background information.
static
static Option.SHARE
Provide a CURLShare for mutexing non-ts data
static
static Option.PROXYTYPE
indicates type of proxy. accepted values are CURLPROXY_HTTP (default), CURLPROXY_HTTPS, CURLPROXY_SOCKS4, CURLPROXY_SOCKS4A and CURLPROXY_SOCKS5.
static
static Option.ACCEPT_ENCODING
Set the Accept-Encoding string. Use this to tell a server you would like the response to be compressed. Before 7.21.6, this was known as CURLOPT_ENCODING
static
static Option.PRIVATE
Set pointer to private data
static
static Option.HTTP200ALIASES
Set aliases for HTTP 200 in the HTTP Response header
static
static Option.UNRESTRICTED_AUTH
Continue to send authentication (user+password) when following locations, even when hostname changed. This can potentially send off the name and password to whatever host the server decides.
static
static Option.FTP_USE_EPRT
Specifically switch on or off the FTP engine’s use of the EPRT command ( it also disables the LPRT attempt). By default, those ones will always be attempted before the good old traditional PORT command.
static
static Option.HTTPAUTH
Set this to a bitmask value to enable the particular authentications methods you like. Use this in combination with CURLOPT_USERPWD. Note that setting multiple bits may cause extra network round-trips.
static
static Option.FTP_CREATE_MISSING_DIRS
FTP Option that causes missing dirs to be created on the remote server. In 7.19.4 we introduced the convenience enums for this option using the CURLFTP_CREATE_DIR prefix.
static
static Option.PROXYAUTH
Set this to a bitmask value to enable the particular authentications methods you like. Use this in combination with CURLOPT_PROXYUSERPWD. Note that setting multiple bits may cause extra network round-trips.
static
static Option.FTP_RESPONSE_TIMEOUT
FTP option that changes the timeout, in seconds, associated with getting a response. This is different from transfer timeout time and essentially places a demand on the FTP server to acknowledge commands in a timely manner.
static
static Option.SERVER_RESPONSE_TIMEOUT
This option that changes the timeout, in seconds, associated with getting a response from a server.
static
static Option.IPRESOLVE
Set this option to one of the CURL_IPRESOLVE_* defines (see below) to tell libcurl to use those IP versions only. This only has effect on systems with support for more than one, i.e IPv4 and IPv6.
static
static Option.MAXFILESIZE
Set this option to limit the size of a file that will be downloaded from an HTTP or FTP server.

There is also _LARGE version which adds large file support for platforms which have larger off_t sizes. See MAXFILESIZE_LARGE below.

static
static Option.INFILESIZE_LARGE
See the comment for INFILESIZE above, but in short, specifies the size of the file being uploaded. -1 means unknown.
static
static Option.RESUME_FROM_LARGE
Sets the continuation offset. There is also a CURLOPTTYPE_LONG version of this; look above for RESUME_FROM.
static
static Option.MAXFILESIZE_LARGE
Sets the maximum size of data that will be downloaded from an HTTP or FTP server. See MAXFILESIZE above for the LONG version.
static
static Option.NETRC_FILE
Set this option to the file name of your .netrc file you want libcurl to parse (using the CURLOPT_NETRC option). If not set, libcurl will do a poor attempt to find the user’s home directory and check for a .netrc file in there.
static
static Option.USE_SSL
Enable SSL/TLS for FTP, pick one of: CURLUSESSL_TRY - try using SSL, proceed anyway otherwise CURLUSESSL_CONTROL - SSL for the control connection or fail CURLUSESSL_ALL - SSL for all communication or fail
static
static Option.POSTFIELDSIZE_LARGE
The _LARGE version of the standard POSTFIELDSIZE option
static
static Option.TCP_NODELAY
Enable/disable the TCP Nagle algorithm
static
static Option.FTPSSLAUTH
When FTP over SSL/TLS is selected (with CURLOPT_USE_SSL), this option can be used to change libcurl’s default action which is to first try “AUTH SSL” and then “AUTH TLS” in this order, and proceed when a OK response has been received.

Available parameters are: CURLFTPAUTH_DEFAULT - let libcurl decide CURLFTPAUTH_SSL - try “AUTH SSL” first, then TLS CURLFTPAUTH_TLS - try “AUTH TLS” first, then SSL

static
static Option.FTP_ACCOUNT
null-terminated string for pass on to the FTP server when asked for “account” info
static
static Option.COOKIELIST
feed cookie into cookie engine
static
static Option.IGNORE_CONTENT_LENGTH
ignore Content-Length
static
static Option.FTP_SKIP_PASV_IP
Set to non-zero to skip the IP address received in a 227 PASV FTP server response. Typically used for FTP-SSL purposes but is not restricted to that. libcurl will then instead use the same IP address it used for the control connection.
static
static Option.FTP_FILEMETHOD
Select “file method” to use when doing FTP, see the curl_ftpmethod above.
static
static Option.LOCALPORT
Local port number to bind the socket to
static
static Option.LOCALPORTRANGE
Number of ports to try, including the first one set with LOCALPORT. Thus, setting it to 1 will make no additional attempts but the first.
static
static Option.CONNECT_ONLY
no transfer, set up connection and let application use the socket by extracting it with CURLINFO_LASTSOCKET
static
static Option.MAX_SEND_SPEED_LARGE
limit-rate: maximum number of bytes per second to send
static
static Option.MAX_RECV_SPEED_LARGE
limit-rate: maximum number of bytes per second to receive
static
static Option.FTP_ALTERNATIVE_TO_USER
Pointer to command string to send if USER/PASS fails.
static
static Option.SSL_SESSIONID_CACHE
set to 0 to disable session ID re-use for this transfer, default is enabled (== 1)
static
static Option.SSH_AUTH_TYPES
allowed SSH authentication methods
static
static Option.SSH_PUBLIC_KEYFILE
Used by scp/sftp to do public key authentication
static
static Option.SSH_PRIVATE_KEYFILE
Used by scp/sftp to do private key authentication
static
static Option.FTP_SSL_CCC
Send CCC (Clear Command Channel) after authentication
static
static Option.TIMEOUT_MS
Same as TIMEOUT, but with ms resolution
static
static Option.CONNECTTIMEOUT_MS
Same as CONNECTTIMEOUT, but with ms resolution
static
static Option.HTTP_TRANSFER_DECODING
set to zero to disable the libcurl’s decoding and thus pass the raw body data to the application even when it is encoded/compressed via transfter encoding
static
static Option.HTTP_CONTENT_DECODING
set to zero to disable the libcurl’s decoding and thus pass the raw body data to the application even when it is encoded/compressed via content encoding
static
static Option.NEW_FILE_PERMS
Permission used when creating new files on the remote server for protocols that support it, SFTP/SCP/FILE
static
static Option.NEW_DIRECTORY_PERMS
Permission used when creating new directories on the remote server for protocols that support it, SFTP/SCP/FILE
static
static Option.POSTREDIR
Set the behavior of POST when redirecting. Values must be set to one of CURL_REDIR* defines below. This used to be called CURLOPT_POST301
static
static Option.SSH_HOST_PUBLIC_KEY_MD5
used by scp/sftp to verify the host’s public key
static
static Option.COPYPOSTFIELDS
POST volatile input fields.
static
static Option.PROXY_TRANSFER_MODE
set transfer mode (;type=<a|i>) when doing FTP via an HTTP proxy
static
static Option.CRLFILE
CRL file
static
static Option.ISSUERCERT
Issuer certificate
static
static Option.ADDRESS_SCOPE
(IPv6) Address scope
static
static Option.CERTINFO
Collect certificate chain info and allow it to get retrievable with CURLINFO_CERTINFO after the transfer is complete.
static
static Option.USERNAME
“name” (username) to use when fetching.
static
static Option.PASSWORD
“pwd” (password) to use when fetching.
static
static Option.PROXYUSERNAME
“name” (username) to use with Proxy when fetching.
static
static Option.PROXYPASSWORD
“pwd” (password) to use with Proxy when fetching.
static
static Option.NOPROXY
Comma separated list of hostnames defining no-proxy zones. These should match both hostnames directly, and hostnames within a domain. For example, local.com will match local.com and www.local.com, but NOT notlocal.com or www.notlocal.com. For compatibility with other implementations of this, .local.com will be considered to be the same as local.com. A single * is the only valid wildcard, and effectively disables the use of proxy.
static
static Option.TFTP_BLKSIZE
block size for TFTP transfers
static
static Option.SOCKS5_GSSAPI_NEC
Socks Service
static
static Option.PROTOCOLS
set the bitmask for the protocols that are allowed to be used for the transfer, which thus helps the app which takes URLs from users or other external inputs and want to restrict what protocol(s) to deal with. Defaults to CURLPROTO_ALL.
static
static Option.REDIR_PROTOCOLS
set the bitmask for the protocols that libcurl is allowed to follow to, as a subset of the CURLOPT_PROTOCOLS ones. That means the protocol needs to be set in both bitmasks to be allowed to get redirected to.
static
static Option.SSH_KNOWNHOSTS
set the SSH knownhost file name to use
static
static Option.MAIL_FROM
set the SMTP mail originator
static
static Option.MAIL_RCPT
set the list of SMTP mail receiver(s)
static
static Option.FTP_USE_PRET
FTP: send PRET before PASV
static
static Option.RTSP_REQUEST
RTSP request method (OPTIONS, SETUP, PLAY, etc…)
static
static Option.RTSP_SESSION_ID
The RTSP session identifier
static
static Option.RTSP_STREAM_URI
The RTSP stream URI
static
static Option.RTSP_TRANSPORT
The Transport: header to use in RTSP requests
static
static Option.RTSP_CLIENT_CSEQ
Manually initialize the client RTSP CSeq for this handle
static
static Option.RTSP_SERVER_CSEQ
Manually initialize the server RTSP CSeq for this handle
static
static Option.WILDCARDMATCH
Turn on wildcard matching
static
static Option.RESOLVE
send linked-list of name:port:address sets
static
static Option.TLSAUTH_USERNAME
Set a username for authenticated TLS
static
static Option.TLSAUTH_PASSWORD
Set a password for authenticated TLS
static
static Option.TLSAUTH_TYPE
Set authentication type for authenticated TLS
static
static Option.TRANSFER_ENCODING
Set to 1 to enable the “TE:” header in HTTP requests to ask for compressed transfer-encoded responses. Set to 0 to disable the use of TE: in outgoing requests. The current default is 0, but it might change in a future libcurl release.

libcurl will ask for the compressed methods it knows of, and if that isn’t any, it will not ask for transfer-encoding at all even if this option is set to 1.

static
static Option.GSSAPI_DELEGATION
allow GSSAPI credential delegation
static
static Option.DNS_SERVERS
Set the name servers to use for DNS resolution
static
static Option.ACCEPTTIMEOUT_MS
Time-out accept operations (currently for FTP only) after this amount of milliseconds.
static
static Option.TCP_KEEPALIVE
Set TCP keepalive
static
static Option.TCP_KEEPIDLE
non-universal keepalive idle time (Linux, AIX, HP-UX, more)
static
static Option.TCP_KEEPINTVL
non-universal keepalive interval (Linux, AIX, HP-UX, more)
static
static Option.SSL_OPTIONS
Enable/disable specific SSL features with a bitmask, see CURLSSLOPT_*
static
static Option.MAIL_AUTH
Set the SMTP auth originator
static
static Option.SASL_IR
Enable/disable SASL initial response
static
static Option.XOAUTH2_BEARER
The XOAUTH2 bearer token
static
static Option.DNS_INTERFACE
Set the interface string to use as outgoing network interface for DNS requests. Only supported by the c-ares DNS backend
static
static Option.DNS_LOCAL_IP4
Set the local IPv4 address to use for outgoing DNS requests. Only supported by the c-ares DNS backend
static
static Option.DNS_LOCAL_IP6
Set the local IPv6 address to use for outgoing DNS requests. Only supported by the c-ares DNS backend
static
static Option.LOGIN_OPTIONS
Set authentication options directly
static
static Option.SSL_ENABLE_NPN
Enable/disable TLS NPN extension (http2 over ssl might fail without)
static
static Option.SSL_ENABLE_ALPN
Enable/disable TLS ALPN extension (http2 over ssl might fail without)
static
static Option.EXPECT_100_TIMEOUT_MS
Time to wait for a response to a HTTP request containing an Expect: 100-continue header before sending the data anyway.
static
static Option.PROXYHEADER
This points to a linked list of headers used for proxy requests only, struct curl_slist kind
static
static Option.HEADEROPT
Pass in a bitmask of “header options”
static
static Option.PINNEDPUBLICKEY
The public key in DER form used to validate the peer public key this option is used only if SSL_VERIFYPEER is true <div class="cite">static </div>
static Option.UNIX_SOCKET_PATH
Path to Unix domain socket
static
static Option.SSL_VERIFYSTATUS
Set if we should verify the certificate status.
static
static Option.SSL_FALSESTART
Set if we should enable TLS false start.
static
static Option.PATH_AS_IS
Do not squash dot-dot sequences
static
static Option.PROXY_SERVICE_NAME
Proxy Service Name
static
static Option.SERVICE_NAME
Service Name
static
static Option.PIPEWAIT
Wait/don’t wait for pipe/mutex to clarify
static
static Option.DEFAULT_PROTOCOL
Set the protocol used when curl is given a URL without a protocol
static
static Option.STREAM_WEIGHT
Set stream weight, 1 - 256 (default is 16)
static
static Option.STREAM_DEPENDS
Set stream dependency on another CURL handle
static
static Option.STREAM_DEPENDS_E
Set E-xclusive stream dependency on another CURL handle
static
static Option.TFTP_NO_OPTIONS
Do not send any tftp option requests to the server
static
static Option.CONNECT_TO
Linked-list of host:port:connect-to-host:connect-to-port, overrides the URL’s host:port (only for the network layer) <div class="cite">static </div>
static Option.TCP_FASTOPEN
Set TCP Fast Open
static
static Option.KEEP_SENDING_ON_ERROR
Continue to send data if the server responds early with an HTTP status code >= 300
static
static Option.PROXY_CAINFO
The CApath or CAfile used to validate the proxy certificate this option is used only if PROXY_SSL_VERIFYPEER is true
static
static Option.PROXY_CAPATH
The CApath directory used to validate the proxy certificate this option is used only if PROXY_SSL_VERIFYPEER is true
static
static Option.PROXY_SSL_VERIFYPEER
Set if we should verify the proxy in ssl handshake, set 1 to verify.
static
static Option.PROXY_SSL_VERIFYHOST
Set if we should verify the Common name from the proxy certificate in ssl handshake, set 1 to check existence, 2 to ensure that it matches the provided hostname.
static
static Option.PROXY_SSLVERSION
What version to specifically try to use for proxy. See CURL_SSLVERSION defines below.
static
static Option.PROXY_TLSAUTH_USERNAME
Set a username for authenticated TLS for proxy
static
static Option.PROXY_TLSAUTH_PASSWORD
Set a password for authenticated TLS for proxy
static
static Option.PROXY_TLSAUTH_TYPE
Set authentication type for authenticated TLS for proxy
static
static Option.PROXY_SSLCERT
name of the file keeping your private SSL-certificate for proxy
static
static Option.PROXY_SSLCERTTYPE
type of the file keeping your SSL-certificate (“DER”, “PEM”, “ENG”) for proxy
static
static Option.PROXY_SSLKEY
name of the file keeping your private SSL-key for proxy
static
static Option.PROXY_SSLKEYTYPE
type of the file keeping your private SSL-key (“DER”, “PEM”, “ENG”) for proxy
static
static Option.PROXY_KEYPASSWD
password for the SSL private key for proxy
static
static Option.PROXY_SSL_CIPHER_LIST
Specify which SSL ciphers to use for proxy
static
static Option.PROXY_CRLFILE
CRL file for proxy
static
static Option.PROXY_SSL_OPTIONS
Enable/disable specific SSL features with a bitmask for proxy, see CURLSSLOPT_*
static
static Option.PRE_PROXY
Name of pre proxy to use.
static
static Option.PROXY_PINNEDPUBLICKEY
The public key in DER form used to validate the proxy public key this option is used only if PROXY_SSL_VERIFYPEER is true
static
static Option.ABSTRACT_UNIX_SOCKET
Path to an abstract Unix domain socket
static
static Option.SUPPRESS_CONNECT_HEADERS
Suppress proxy CONNECT response headers from user callbacks
static
static Option.REQUEST_TARGET
The request target, instead of extracted from the URL
static
static Option.SOCKS5_AUTH
bitmask of allowed auth methods for connections to SOCKS5 proxies
static
static Option.SSH_COMPRESSION
Enable/disable SSH compression
static
static Option.MIMEPOST
Post MIME data.
static
static Option.TIMEVALUE_LARGE
Time to use with the CURLOPT_TIMECONDITION. Specified in number of seconds since 1 Jan 1970.
static
static Option.HAPPY_EYEBALLS_TIMEOUT_MS
Head start in milliseconds to give happy eyeballs.
static
static Option.HAPROXYPROTOCOL
send HAProxy PROXY protocol header?
static
static Option.DNS_SHUFFLE_ADDRESSES
shuffle addresses before use when DNS returns multiple
static
static Option.TLS13_CIPHERS
Specify which TLS 1.3 ciphers suites to use
static
static Option.PROXY_TLS13_CIPHERS
Specify which TLS 1.3 ciphers suites to use with a proxy
static
static Option.DISALLOW_USERNAME_IN_URL
Disallow specifying username/login in URL.
static
static Option.DOH_URL
DNS-over-HTTPS URL
static
static Option.UPLOAD_BUFFERSIZE
Preferred buffer size to use for uploads
static
static Option.UPKEEP_INTERVAL_MS
Time in ms between connection upkeep calls for long-lived connections.
static
static Option.CURLU
Specify URL using CURL URL API.
static
static Option.HTTP09_ALLOWED
set this to 1L to allow HTTP/0.9 responses or 0L to disallow
static
static Option.ALTSVC_CTRL
alt-svc control bitmask
static
static Option.ALTSVC
alt-svc cache file name to possibly read from/write to
static
static Option.MAXAGE_CONN
maximum age of a connection to consider it for reuse (in seconds)
static
static Option.SASL_AUTHZID
SASL authorisation identity
static

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Copyright © 2021 Ore Richard Muyiwa. Distributed under the MIT license.