D Programming Language
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# etc.c.curl

This is an interface to the libcurl library.

Converted to D from curl headers by htod and cleaned up by Jonas Drewsen (jdrewsen)

Windows x86 note: A DMD compatible libcurl static library can be downloaded from the dlang.org download page.

Copyright (C) 1998 - 2010, Daniel Stenberg, <daniel@haxx.se>, et al.

This software is licensed as described in the file COPYING, which you should have received as part of this distribution. The terms are also available at http://curl.haxx.se/docs/copyright.html.

You may opt to use, copy, modify, merge, publish, distribute and/or sell copies of the Software, and permit persons to whom the Software is furnished to do so, under the terms of the COPYING file.

This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.

string LIBCURL_COPYRIGHT;
  This is the global package copyright

string LIBCURL_VERSION;
  This is the version number of the libcurl package from which this header file origins:

int LIBCURL_VERSION_MAJOR;
int LIBCURL_VERSION_MINOR;
int LIBCURL_VERSION_PATCH;
  The numeric version number is also available "in parts" by using these constants

int LIBCURL_VERSION_NUM;
  This is the numeric version of the libcurl version number, meant for easier parsing and comparions by programs. The LIBCURL_VERSION_NUM define will always follow this syntax:

  0xXXYYZZ

  Where XX, YY and ZZ are the main version, release and patch numbers in hexadecimal (using 8 bits each). All three numbers are always represented using two digits. 1.2 would appear as "0x010200" while version 9.11.7 appears as "0x090b07".

  This 6-digit (24 bits) hexadecimal number does not show pre-release number, and it is always a greater number in a more recent release. It makes comparisons with greater than and less than work.

string LIBCURL_TIMESTAMP;
  This is the date and time when the full source package was created. The timestamp is not stored in git, as the timestamp is properly set in the tarballs by the maketgz script.

  The format of the date should follow this template:

  "Mon Feb 12 11:35:33 UTC 2007"

alias curl_off_t = long;
  Data type definition of curl_off_t.

  jdrewsen - Always 64bit signed and that is what long is in D.

  Comment below is from curlbuild.h:

  NOTE 2:

  For any given platform/compiler curl_off_t must be typedef'ed to a 64-bit wide signed integral data type. The width of this data type must remain constant and independent of any possible large file support settings.

  As an exception to the above, curl_off_t shall be typedef'ed to a 32-bit wide signed integral data type if there is no 64-bit type.

alias CURL = void;

alias curl_socket_t = std.socket.socket_t;
  jdrewsen - Get socket alias from std.socket

struct curl_httppost;

  curl_httppost* next;
    next entry in the list

  char* name;
    pointer to allocated name

  c_long namelength;
    length of name length

  char* contents;
    pointer to allocated data contents

  c_long contentslength;
    length of contents field

  char* buffer;
    pointer to allocated buffer contents

  c_long bufferlength;
    length of buffer field

  char* contenttype;
    Content-Type

  curl_slist* contentheader;
    list of extra headers for this form

  curl_httppost* more;
    if one field name has more than one file, this link should link to following files

  c_long flags;
    as defined below

  char* showfilename;
    The file name to show. If not set, the actual file name will be used (if this is a file part)

  void* userp;
    custom pointer used for HTTPPOST_CALLBACK posts

int HTTPPOST_FILENAME;
  specified content is a file name

int HTTPPOST_READFILE;
  specified content is a file name

int HTTPPOST_PTRNAME;
  name is only stored pointer do not free in formfree

int HTTPPOST_PTRCONTENTS;
  contents is only stored pointer do not free in formfree

int HTTPPOST_BUFFER;
  upload file from buffer

int HTTPPOST_PTRBUFFER;
  upload file from pointer contents

int HTTPPOST_CALLBACK;
  upload file contents by using the regular read callback to get the data and pass the given pointer as custom pointer

alias curl_progress_callback = int function(void* clientp, double dltotal, double dlnow, double ultotal, double ulnow);

int CURL_MAX_WRITE_SIZE;
  Tests have proven that 20K is a very bad buffer size for uploads on Windows, while 16K for some odd reason performed a lot better. We do the ifndef check to allow this value to easier be changed at build time for those who feel adventurous. The practical minimum is about 400 bytes since libcurl uses a buffer of this size as a scratch area (unrelated to network send operations).

int CURL_MAX_HTTP_HEADER;
  The only reason to have a max limit for this is to avoid the risk of a bad server feeding libcurl with a never-ending header that will cause reallocs infinitely

int CURL_WRITEFUNC_PAUSE;
  This is a magic return code for the write callback that, when returned, will signal libcurl to pause receiving on the current transfer.

alias curl_write_callback = uint function(char* buffer, uint size, uint nitems, void* outstream);

enum CurlFileType: int;
  enumeration of file types

  file

  directory

  symlink

  device_block

  device_char

  namedpipe

  socket

  door

  unknown
    is possible only on Sun Solaris now

alias curlfiletype = int;

enum CurlFInfoFlagKnown: int;

  filename

  filetype

  time

  perm

  uid

  gid

  size

  hlinkcount

struct _N2;
  Content of this structure depends on information which is known and is achievable (e.g. by FTP LIST parsing). Please see the url_easy_setopt(3) man page for callbacks returning this structure -- some fields are mandatory, some others are optional. The FLAG field has special meaning.

  If some of these fields is not NULL, it is a pointer to b_data.

  char* time;

  char* perm;

  char* user;

  char* group;

  char* target;
    pointer to the target filename of a symlink

struct curl_fileinfo;
  Content of this structure depends on information which is known and is achievable (e.g. by FTP LIST parsing). Please see the url_easy_setopt(3) man page for callbacks returning this structure -- some fields are mandatory, some others are optional. The FLAG field has special meaning.

  char* filename;

  curlfiletype filetype;

  time_t time;

  uint perm;

  int uid;

  int gid;

  curl_off_t size;

  c_long hardlinks;

  _N2 strings;

  uint flags;

  char* b_data;

  size_t b_size;

  size_t b_used;

enum CurlChunkBgnFunc: int;
  return codes for CURLOPT_CHUNK_BGN_FUNCTION

  ok

  fail
    tell the lib to end the task

  skip
    skip this chunk over

alias curl_chunk_bgn_callback = int function(void* transfer_info, void* ptr, int remains);
  if splitting of data transfer is enabled, this callback is called before download of an individual chunk started. Note that parameter "remains" works only for FTP wildcard downloading (for now), otherwise is not used

enum CurlChunkEndFunc: int;
  return codes for CURLOPT_CHUNK_END_FUNCTION

  ok

  fail

alias curl_chunk_end_callback = int function(void* ptr);
  If splitting of data transfer is enabled this callback is called after download of an individual chunk finished. Note! After this callback was set then it have to be called FOR ALL chunks. Even if downloading of this chunk was skipped in CHUNK_BGN_FUNC. This is the reason why we don't need "transfer_info" parameter in this callback and we are not interested in "remains" parameter too.

enum CurlFnMAtchFunc: int;
  return codes for FNMATCHFUNCTION

  match

  nomatch

  fail

alias curl_fnmatch_callback = int function(void* ptr, char* pattern, char* string);
  callback type for wildcard downloading pattern matching. If the string matches the pattern, return CURL_FNMATCHFUNC_MATCH value, etc.

enum CurlSeekPos: int;
  seek whence...

  set

  current

  end

enum CurlSeek: int;
  These are the return codes for the seek callbacks

  ok

  fail
    fail the entire transfer

  cantseek
    tell libcurl seeking can't be done, so libcurl might try other means instead

alias curl_seek_callback = int function(void* instream, long offset, int origin);

enum CurlReadFunc: int;

  abort
    This is a return code for the read callback that, when returned, will signal libcurl to immediately abort the current transfer.

  pause
    This is a return code for the read callback that, when returned, will const signal libcurl to pause sending data on the current transfer.

alias curl_read_callback = uint function(char* buffer, uint size, uint nitems, void* instream);

enum CurlSockType: int;

  ipcxn
    socket created for a specific IP connection

  last
    never use

alias curlsocktype = int;

alias curl_sockopt_callback = int function(void* clientp, socket_t curlfd, int purpose);

struct curl_sockaddr;
  addrlen was a socklen_t type before 7.18.0 but it turned really ugly and painful on the systems that lack this type

  int family;

  int socktype;

  int protocol;

  uint addrlen;
    addrlen was a socklen_t type before 7.18.0 but it turned really ugly and painful on the systems that lack this type

  sockaddr addr;

alias curl_opensocket_callback = socket_t function(void* clientp, int purpose, curl_sockaddr* address);

enum CurlIoError: int;

  ok
    I/O operation successful

  unknowncmd
    command was unknown to callback

  failrestart
    failed to restart the read

  last
    never use

alias curlioerr = int;

enum CurlIoCmd: int;

  nop
    command was unknown to callback

  restartread
    failed to restart the read

  last
    never use

alias curliocmd = int;

alias curl_ioctl_callback = int function(void* handle, int cmd, void* clientp);

alias curl_malloc_callback = void* function(uint size);
alias curl_free_callback = void function(void* ptr);
alias curl_realloc_callback = void* function(void* ptr, uint size);
alias curl_strdup_callback = char* function(char* str);
alias curl_calloc_callback = void* function(uint nmemb, uint size);
  The following typedef's are signatures of malloc, free, realloc, strdup and calloc respectively. Function pointers of these types can be passed to the curl_global_init_mem() function to set user defined memory management callback routines.

enum CurlCallbackInfo: int;
  the kind of data that is passed to information_callback

  text

  header_in

  header_out

  data_in

  data_out

  ssl_data_in

  ssl_data_out

  end

alias curl_infotype = int;

alias curl_debug_callback = int function(void* handle, int type, char* data, uint size, void* userptr);

enum CurlError: int;
  All possible error codes from all sorts of curl functions. Future versions may return other values, stay prepared.

  Always add new return codes last. Never *EVER* remove any. The return codes must remain the same!

  ok

  unsupported_protocol
    1

  failed_init
    2

  url_malformat
    3

  obsolete4
    4 - NOT USED

  couldnt_resolve_proxy
    5

  couldnt_resolve_host
    6

  couldnt_connect
    7

  ftp_weird_server_reply
    8

  remote_access_denied
    9 a service was denied by the server due to lack of access - when login fails this is not returned.

  obsolete10
    10 - NOT USED

  ftp_weird_pass_reply
    11

  obsolete12
    12 - NOT USED

  ftp_weird_pasv_reply
    13

  ftp_weird_227_format
    14

  ftp_cant_get_host
    15

  obsolete16
    16 - NOT USED

  ftp_couldnt_set_type
    17

  partial_file
    18

  ftp_couldnt_retr_file
    19

  obsolete20
    20 - NOT USED

  quote_error
    21 - quote command failure

  http_returned_error
    22

  write_error
    23

  obsolete24
    24 - NOT USED

  upload_failed
    25 - failed upload "command"

  read_error
    26 - couldn't open/read from file

  out_of_memory
    27

  operation_timedout
    Note:
    CURLE_OUT_OF_MEMORY may sometimes indicate a conversion error instead of a memory allocation error if CURL_DOES_CONVERSIONS is defined

    28 - the timeout time was reached

  obsolete29
    29 - NOT USED

  ftp_port_failed
    30 - FTP PORT operation failed

  ftp_couldnt_use_rest
    31 - the REST command failed

  obsolete32
    32 - NOT USED

  range_error
    33 - RANGE "command" didn't work

  http_post_error
    34

  ssl_connect_error
    35 - wrong when connecting with SSL

  bad_download_resume
    36 - couldn't resume download

  file_couldnt_read_file
    37

  ldap_cannot_bind
    38

  ldap_search_failed
    39

  obsolete40
    40 - NOT USED

  function_not_found
    41

  aborted_by_callback
    42

  bad_function_argument
    43

  obsolete44
    44 - NOT USED

  interface_failed
    45 - CURLOPT_INTERFACE failed

  obsolete46
    46 - NOT USED

  too_many_redirects
    47 - catch endless re-direct loops

  unknown_telnet_option
    48 - User specified an unknown option

  telnet_option_syntax
    49 - Malformed telnet option

  obsolete50
    50 - NOT USED

  peer_failed_verification
    51 - peer's certificate or fingerprint wasn't verified fine

  got_nothing
    52 - when this is a specific error

  ssl_engine_notfound
    53 - SSL crypto engine not found

  ssl_engine_setfailed
    54 - can not set SSL crypto engine as default

  send_error
    55 - failed sending network data

  recv_error
    56 - failure in receiving network data

  obsolete57
    57 - NOT IN USE

  ssl_certproblem
    58 - problem with the local certificate

  ssl_cipher
    59 - couldn't use specified cipher

  ssl_cacert
    60 - problem with the CA cert (path?)

  bad_content_encoding
    61 - Unrecognized transfer encoding

  ldap_invalid_url
    62 - Invalid LDAP URL

  filesize_exceeded
    63 - Maximum file size exceeded

  use_ssl_failed
    64 - Requested FTP SSL level failed

  send_fail_rewind
    65 - Sending the data requires a rewind that failed

  ssl_engine_initfailed
    66 - failed to initialise ENGINE

  login_denied
    67 - user, password or similar was not accepted and we failed to login

  tftp_notfound
    68 - file not found on server

  tftp_perm
    69 - permission problem on server

  remote_disk_full
    70 - out of disk space on server

  tftp_illegal
    71 - Illegal TFTP operation

  tftp_unknownid
    72 - Unknown transfer ID

  remote_file_exists
    73 - File already exists

  tftp_nosuchuser
    74 - No such user

  conv_failed
    75 - conversion failed

  conv_reqd
    76 - caller must register conversion callbacks using curl_easy_setopt options CURLOPT_CONV_FROM_NETWORK_FUNCTION, CURLOPT_CONV_TO_NETWORK_FUNCTION, and CURLOPT_CONV_FROM_UTF8_FUNCTION

  ssl_cacert_badfile
    77 - could not load CACERT file, missing or wrong format

  remote_file_not_found
    78 - remote file not found

  ssh
    79 - error from the SSH layer, somewhat generic so the error message will be of interest when this has happened

  ssl_shutdown_failed
    80 - Failed to shut down the SSL connection

  again
    81 - socket is not ready for send/recv, wait till it's ready and try again (Added in 7.18.2)

  ssl_crl_badfile
    82 - could not load CRL file, missing or wrong format (Added in 7.19.0)

  ssl_issuer_error
    83 - Issuer check failed. (Added in 7.19.0)

  ftp_pret_failed
    84 - a PRET command failed

  rtsp_cseq_error
    85 - mismatch of RTSP CSeq numbers

  rtsp_session_error
    86 - mismatch of RTSP Session Identifiers

  ftp_bad_file_list
    87 - unable to parse FTP file list

  chunk_failed
    88 - chunk callback reported error

  curl_last
    never use!

alias CURLcode = int;

alias curl_conv_callback = int function(char* buffer, uint length);
  This prototype applies to all conversion callbacks

alias curl_ssl_ctx_callback = int function(void* curl, void* ssl_ctx, void* userptr);
  actually an OpenSSL SSL_CTX

enum CurlProxy: int;

  http
    added in 7.10, new in 7.19.4 default is to use CONNECT HTTP/1.1

  http_1_0
    added in 7.19.4, force to use CONNECT HTTP/1.0

  socks4
    support added in 7.15.2, enum existed already in 7.10

  socks5
    added in 7.10

  socks4a
    added in 7.18.0

  socks5_hostname
    Use the SOCKS5 protocol but pass along the host name rather than the IP address. added in 7.18.0

alias curl_proxytype = int;

enum CurlAuth: long;

  basic
    Basic (default)

  digest
    Digest

  gssnegotiate
    GSS-Negotiate

  ntlm
    NTLM

  digest_ie
    Digest with IE flavour

  only
    used together with a single other type to force no auth or just that single type

  any
    all fine types set

  anysafe

enum CurlSshAuth: int;

  any
    all types supported by the server

  none
    none allowed, silly but complete

  publickey
    public/private key files

  password
    password

  host
    host key files

  keyboard
    keyboard interactive

int CURL_ERROR_SIZE;

enum CurlKHType: int;
  points to a zero-terminated string encoded with base64 if len is zero, otherwise to the "raw" data

  unknown

  rsa1

  rsa

  dss

struct curl_khkey;

  char* key;
    points to a zero-terminated string encoded with base64 if len is zero, otherwise to the "raw" data

  size_t len;

  CurlKHType keytype;

enum CurlKHStat: int;
  this is the set of return values expected from the curl_sshkeycallback callback

  fine_add_to_file

  fine

  reject
    reject the connection, return an error

  defer
    do not accept it, but we can't answer right now so this causes a CURLE_DEFER error but otherwise the connection will be left intact etc

  last
    not for use, only a marker for last-in-list

enum CurlKHMatch: int;
  this is the set of status codes pass in to the callback

  ok
    match

  mismatch
    host found, key mismatch!

  missing
    no matching host/key found

  last
    not for use, only a marker for last-in-list

alias curl_sshkeycallback = int function(void* easy, curl_khkey* knownkey, curl_khkey* foundkey, CurlKHMatch m, void* clientp);

enum CurlUseSSL: int;
  parameter for the CURLOPT_USE_SSL option

  none
    do not attempt to use SSL

  tryssl
    try using SSL, proceed anyway otherwise

  control
    SSL for the control connection or fail

  all
    SSL for all communication or fail

  last
    not an option, never use

alias curl_usessl = int;

enum CurlFtpSSL: int;
  parameter for the CURLOPT_FTP_SSL_CCC option

  ccc_none
    do not send CCC

  ccc_passive
    Let the server initiate the shutdown

  ccc_active
    Initiate the shutdown

  ccc_last
    not an option, never use

alias curl_ftpccc = int;

enum CurlFtpAuth: int;
  parameter for the CURLOPT_FTPSSLAUTH option

  defaultauth
    let libcurl decide

  ssl
    use "AUTH SSL"

  tls
    use "AUTH TLS"

  last
    not an option, never use

alias curl_ftpauth = int;

enum CurlFtp: int;
  parameter for the CURLOPT_FTP_CREATE_MISSING_DIRS option

  create_dir_none
    do NOT create missing dirs!

  create_dir
    (FTP/SFTP) if CWD fails, try MKD and then CWD again if MKD succeeded, for SFTP this does similar magic

  create_dir_retry
    (FTP only) if CWD fails, try MKD and then CWD again even if MKD failed!

  create_dir_last
    not an option, never use

alias curl_ftpcreatedir = int;

enum CurlFtpMethod: int;
  parameter for the CURLOPT_FTP_FILEMETHOD option

  defaultmethod
    let libcurl pick

  multicwd
    single CWD operation for each path part

  nocwd
    no CWD at all

  singlecwd
    one CWD to full dir, then work on file

  last
    not an option, never use

alias curl_ftpmethod = int;

enum CurlProto: int;
  CURLPROTO_ defines are for the CURLOPT_*PROTOCOLS options

  http

  https

  ftp

  ftps

  scp

  sftp

  telnet

  ldap

  ldaps

  dict

  file

  tftp

  imap

  imaps

  pop3

  pop3s

  smtp

  smtps

  rtsp

  rtmp

  rtmpt

  rtmpe

  rtmpte

  rtmps

  rtmpts

  gopher

  all
    enable everything

int CURLOPTTYPE_LONG;
int CURLOPTTYPE_OBJECTPOINT;
int CURLOPTTYPE_FUNCTIONPOINT;
int CURLOPTTYPE_OFF_T;
  long may be 32 or 64 bits, but we should never depend on anything else but 32

alias LONG = CURLOPTTYPE_LONG;
alias OBJECTPOINT = CURLOPTTYPE_OBJECTPOINT;
alias FUNCTIONPOINT = CURLOPTTYPE_FUNCTIONPOINT;
alias OFF_T = CURLOPTTYPE_OFF_T;
  name is uppercase CURLOPT_, type is one of the defined CURLOPTTYPE_ number is unique identifier

  The macro "##" is ISO C, we assume pre-ISO C doesn't support it.

enum CurlOption: int;

  file
    This is the FILE * or void * the regular output should be written to.

  url
    The full URL to get/put

  port
    Port number to connect to, if other than default.

  proxy
    Name of proxy to use.

  userpwd
    "name:password" to use when fetching.

  proxyuserpwd
    "name:password" to use with proxy.

  range
    Range to get, specified as an ASCII string.

  infile
    not used

    Specified file stream to upload from (use as input):

  errorbuffer
    Buffer to receive error messages in, must be at least CURL_ERROR_SIZE bytes big. If this is not used, error messages go to stderr instead:

  writefunction
    Function that will be called to store the output (instead of fwrite). The parameters will use fwrite() syntax, make sure to follow them.

  readfunction
    Function that will be called to read the input (instead of fread). The parameters will use fread() syntax, make sure to follow them.

  timeout
    Time-out the read operation after this amount of seconds

  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.

  postfields
    POST static input fields.

  referer
    Set the referrer page (needed by some CGIs)

  ftpport
    Set the FTP PORT string (interface name, named or numerical IP address) Use i.e '-' to use default address.

  useragent
    Set the User-Agent string (examined by some CGIs)

  low_speed_limit
    If the download receives less than "low speed limit" bytes/second during "low speed time" seconds, the operations is aborted. You could i.e if you have a pretty high speed connection, abort if it is less than 2000 bytes/sec during 20 seconds.

    Set the "low speed limit"

  low_speed_time
    Set the "low speed time"

  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.

  cookie
    Set cookie in request:

  httpheader
    This points to a linked list of headers, struct curl_slist kind

  httppost
    This points to a linked list of post entries, struct curl_httppost

  sslcert
    name of the file keeping your private SSL-certificate

  keypasswd
    password for the SSL or SSH private key

  crlf
    send TYPE parameter?

  quote
    send linked-list of QUOTE commands

  writeheader
    send FILE * or void * to store headers to, if you use a callback it is simply passed to the callback unmodified

  cookiefile
    point to a file to read the initial cookies from, also enables "cookie awareness"

  sslversion
    What version to specifically try to use. See CURL_SSLVERSION defines below.

  timecondition
    What kind of HTTP time condition to use, see defines

  timevalue
    Time to use with the above condition. Specified in number of seconds since 1 Jan 1970

  customrequest
    35 = OBSOLETE

    Custom request, for customizing the get command like

    HTTP:
    DELETE, TRACE and others

    FTP:
    to use a different list command

  stderr
    HTTP request, for odd commands like DELETE, TRACE and others

  postquote
    38 is not used

    send linked-list of post-transfer QUOTE commands

  writeinfo
    Pass a pointer to string of the output using full variable-replacement as described elsewhere.

  verbose
    talk a lot

  header
    throw the header out too

  noprogress
    shut off the progress meter

  nobody
    use HEAD to get http document

  failonerror
    no output on http error codes >= 300

  upload
    this is an upload

  post
    HTTP POST method

  dirlistonly
    return bare names when listing directories

  append
    Append instead of overwrite on upload!

  netrc
    Specify whether to read the user+password from the .netrc or the URL. This must be one of the CURL_NETRC_* enums below.

  followlocation
    use Location: Luke!

  transfertext
    transfer data in text/ASCII format

  put
    HTTP PUT

  progressfunction
    55 = OBSOLETE

    Function that will be called instead of the internal progress display function. This function should be defined as the curl_progress_callback prototype defines.

  progressdata
    Data passed to the progress callback

  autoreferer
    We want the referrer field set automatically when following locations

  proxyport
    Port of the proxy, can be set in the proxy string as well with: "[host]:[port]"

  postfieldsize
    size of the POST input data, if strlen() is not good to use

  httpproxytunnel
    tunnel non-http operations through a HTTP proxy

  intrface
    Set the interface string to use as outgoing network interface

  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.

  ssl_verifypeer
    Set if we should verify the peer in ssl handshake, set 1 to verify.

  cainfo
    The CApath or CAfile used to validate the peer certificate this option is used only if SSL_VERIFYPEER is true

  maxredirs
    66 = OBSOLETE

    67 = OBSOLETE

    Maximum number of http redirects to follow

  filetime
    Pass a long set to 1 to get the date of the requested document (if possible)! Pass a zero to shut it off.

  telnetoptions
    This points to a linked list of telnet options

  maxconnects
    Max amount of cached alive connections

  closepolicy
    What policy to use when closing connections when the cache is filled up

  fresh_connect
    73 = OBSOLETE

    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.

  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.

  random_file
    Set to a file name that contains random data for libcurl to use to seed the random engine when doing SSL connects.

  egdsocket
    Set to the Entropy Gathering Daemon socket pathname

  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. [Only works on unix-style/SIGALRM operating systems]

  headerfunction
    Function that will be called to store headers (instead of fwrite). The parameters will use fwrite() syntax, make sure to follow them.

  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.

  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.

  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.

  ssl_cipher_list
    Specify which SSL ciphers to use

  http_version
    Specify which HTTP version to use! This must be set to one of the CURL_HTTP_VERSION* enums set below.

  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.

  sslcerttype
    type of the file keeping your SSL-certificate ("DER", "PEM", "ENG")

  sslkey
    name of the file keeping your private SSL-key

  sslkeytype
    type of the file keeping your private SSL-key ("DER", "PEM", "ENG")

  sslengine
    crypto engine for the SSL-sub system

  sslengine_default
    set the crypto engine for the SSL-sub system as default the param has no meaning...

  dns_use_global_cache
    Non-zero value means to use the global dns cache

  dns_cache_timeout
    DNS cache timeout

  prequote
    send linked-list of pre-transfer QUOTE commands

  debugfunction
    set the debug function

  debugdata
    set the data for the debug function

  cookiesession
    mark this as start of a cookie session

  capath
    The CApath directory used to validate the peer certificate this option is used only if SSL_VERIFYPEER is true

  buffersize
    Instruct libcurl to use a smaller receive buffer

  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.

  share
    Provide a CURLShare for mutexing non-ts data

  proxytype
    indicates type of proxy. accepted values are CURLPROXY_HTTP (default), CURLPROXY_SOCKS4, CURLPROXY_SOCKS4A and CURLPROXY_SOCKS5.

  encoding
    Set the Accept-Encoding string. Use this to tell a server you would like the response to be compressed.

  private_opt
    Set pointer to private data

  http200aliases
    Set aliases for HTTP 200 in the HTTP Response header

  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.

  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.

  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.

  ssl_ctx_function
    Set the ssl context callback function, currently only for OpenSSL ssl_ctx in second argument. The function must be matching the curl_ssl_ctx_callback proto.

  ssl_ctx_data
    Set the userdata for the ssl context callback function's third argument

  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.

  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.

  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.

  ipresolve
    Set this option to one of the CURL_IPRESOLVE_* defines (see below) to tell libcurl to resolve names to those IP versions only. This only has affect on systems with support for more than one, i.e IPv4 and_ IPv6.

  maxfilesize
    Set this option to limit the size of a file that will be downloaded from an HTTP or FTP server.

    Note there is also LARGE version which adds large file support for platforms which have larger off_t sizes. See MAXFILESIZE_LARGE below.

  infilesize_large
    See the comment for INFILESIZE above, but in short, specifies the size of the file being uploaded. -1 means unknown.

  resume_from_large
    Sets the continuation offset. There is also a LONG version of this; look above for RESUME_FROM.

  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.

  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.

  use_ssl
    Enable SSL/TLS for FTP, pick one of: CURLFTPSSL_TRY - try using SSL, proceed anyway otherwise CURLFTPSSL_CONTROL - SSL for the control connection or fail CURLFTPSSL_ALL - SSL for all communication or fail

  postfieldsize_large
    The LARGE version of the standard POSTFIELDSIZE option

  tcp_nodelay
    Enable/disable the TCP Nagle algorithm

  ftpsslauth
    122 OBSOLETE, used in 7.12.3. Gone in 7.13.0

    123 OBSOLETE. Gone in 7.16.0

    124 OBSOLETE, used in 7.12.3. Gone in 7.13.0

    125 OBSOLETE, used in 7.12.3. Gone in 7.13.0

    126 OBSOLETE, used in 7.12.3. Gone in 7.13.0

    127 OBSOLETE. Gone in 7.16.0

    128 OBSOLETE. Gone in 7.16.0

    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

  ioctlfunction

  ioctldata

  ftp_account
    132 OBSOLETE. Gone in 7.16.0

    133 OBSOLETE. Gone in 7.16.0

    zero terminated string for pass on to the FTP server when asked for "account" info

  cookielist
    feed cookies into cookie engine

  ignore_content_length
    ignore Content-Length

  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.

  ftp_filemethod
    Select "file method" to use when doing FTP, see the curl_ftpmethod above.

  localport
    Local port number to bind the socket to

  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.

  connect_only
    no transfer, set up connection and let application use the socket by extracting it with CURLINFO_LASTSOCKET

  conv_from_network_function
    Function that will be called to convert from the network encoding (instead of using the iconv calls in libcurl)

  conv_to_network_function
    Function that will be called to convert to the network encoding (instead of using the iconv calls in libcurl)

  conv_from_utf8_function
    Function that will be called to convert from UTF8 (instead of using the iconv calls in libcurl) Note that this is used only for SSL certificate processing

  max_send_speed_large
  max_recv_speed_large
    if the connection proceeds too quickly then need to slow it down

    limit-rate: maximum number of bytes per second to send or receive

  ftp_alternative_to_user
    Pointer to command string to send if USER/PASS fails.

  sockoptfunction
    callback function for setting socket options

  ssl_sessionid_cache
    set to 0 to disable session ID re-use for this transfer, default is enabled (== 1)

  ssh_auth_types
    allowed SSH authentication methods

  ssh_public_keyfile
    Used by scp/sftp to do public/private key authentication

  ftp_ssl_ccc
    Send CCC (Clear Command Channel) after authentication

  timeout_ms
    Same as TIMEOUT and CONNECTTIMEOUT, but with ms resolution

  http_transfer_decoding
  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

  new_file_perms
  new_directory_perms
    Permission used when creating new files and directories on the remote server for protocols that support it, SFTP/SCP/FILE

  postredir
    Set the behaviour of POST when redirecting. Values must be set to one of CURL_REDIR* defines below. This used to be called CURLOPT_POST301

  ssh_host_public_key_md5
    used by scp/sftp to verify the host's public key

  opensocketfunction
  opensocketdata
    Callback function for opening socket (instead of socket(2)). Optionally, callback is able change the address or refuse to connect returning CURL_SOCKET_BAD. The callback should have type curl_opensocket_callback

  copypostfields
    POST volatile input fields.

  proxy_transfer_mode
    set transfer mode (;type=) when doing FTP via an HTTP proxy

  seekfunction
  seekdata
    Callback function for seeking in the input stream

  crlfile
    CRL file

  issuercert
    Issuer certificate

  address_scope
    (IPv6) Address scope

  certinfo
    Collect certificate chain info and allow it to get retrievable with CURLINFO_CERTINFO after the transfer is complete. (Unfortunately) only working with OpenSSL-powered builds.

  username
  password
    "name" and "pwd" to use when fetching.

  proxyusername
  proxypassword
    "name" and "pwd" to use with Proxy when fetching.

  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.

  tftp_blksize
    block size for TFTP transfers

  socks5_gssapi_service
    Socks Service

  socks5_gssapi_nec
    Socks Service

  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.

  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. Defaults to all protocols except FILE and SCP.

  ssh_knownhosts
    set the SSH knownhost file name to use

  ssh_keyfunction
    set the SSH host key callback, must point to a curl_sshkeycallback function

  ssh_keydata
    set the SSH host key callback custom pointer

  mail_from
    set the SMTP mail originator

  mail_rcpt
    set the SMTP mail receiver(s)

  ftp_use_pret
    FTP:
    send PRET before PASV

  rtsp_request
    RTSP request method (OPTIONS, SETUP, PLAY, etc...)

  rtsp_session_id
    The RTSP session identifier

  rtsp_stream_uri
    The RTSP stream URI

  rtsp_transport
    The Transport: header to use in RTSP requests

  rtsp_client_cseq
    Manually initialize the client RTSP CSeq for this handle

  rtsp_server_cseq
    Manually initialize the server RTSP CSeq for this handle

  interleavedata
    The stream to pass to INTERLEAVEFUNCTION.

  interleavefunction
    Let the application define a custom write method for RTP data

  wildcardmatch
    Turn on wildcard matching

  chunk_bgn_function
    Directory matching callback called before downloading of an individual file (chunk) started

  chunk_end_function
    Directory matching callback called after the file (chunk) was downloaded, or skipped

  fnmatch_function
    Change match (fnmatch-like) callback for wildcard matching

  chunk_data
    Let the application define custom chunk data pointer

  fnmatch_data
    FNMATCH_FUNCTION user pointer

  resolve
    send linked-list of name:port:address sets

  tlsauth_username
    Set a username for authenticated TLS

  tlsauth_password
    Set a password for authenticated TLS

  tlsauth_type
    Set authentication type for authenticated TLS

  lastentry
    the last unused

alias CURLoption = int;

CurlOption CURLOPT_SERVER_RESPONSE_TIMEOUT;

enum CurlIpResolve: int;
  Below here follows defines for the CURLOPT_IPRESOLVE option. If a host name resolves addresses using more than one IP protocol version, this option might be handy to force libcurl to use a specific IP version.

  whatever
    default, resolves addresses to all IP versions that your system allows

  v4
    resolve to ipv4 addresses

  v6
    resolve to ipv6 addresses

CurlOption CURLOPT_WRITEDATA;
CurlOption CURLOPT_READDATA;
CurlOption CURLOPT_HEADERDATA;
CurlOption CURLOPT_RTSPHEADER;
  three convenient "aliases" that follow the name scheme better

enum CurlHttpVersion: int;
  These enums are for use with the CURLOPT_HTTP_VERSION option.

  none
    setting this means we don't care, and that we'd like the library to choose the best possible for us!

  v1_0
    please use HTTP 1.0 in the request

  v1_1
    please use HTTP 1.1 in the request

  last
    *ILLEGAL* http version

enum CurlRtspReq: int;
  Public API enums for RTSP requests

  none

  options

  describe

  announce

  setup

  play

  pause

  teardown

  get_parameter

  set_parameter

  record

  receive

  last

enum CurlNetRcOption: int;
  These enums are for use with the CURLOPT_NETRC option.

  ignored
    The .netrc will never be read. This is the default.

  optional
    A user:password in the URL will be preferred to one in the .netrc.

  required
    A user:password in the URL will be ignored. Unless one is set programmatically, the .netrc will be queried.

  last

enum CurlSslVersion: int;

  default_version

  tlsv1

  sslv2

  sslv3

  last
    never use

enum CurlTlsAuth: int;

  none

  srp

  last
    never use

enum CurlRedir: int;
  symbols to use with CURLOPT_POSTREDIR. CURL_REDIR_POST_301 and CURL_REDIR_POST_302 can be bitwise ORed so that CURL_REDIR_POST_301 | CURL_REDIR_POST_302 == CURL_REDIR_POST_ALL

  get_all

  post_301

  post_302

  post_all

enum CurlTimeCond: int;

  none

  ifmodsince

  ifunmodsince

  lastmod

  last

alias curl_TimeCond = int;

int curl_strequal(char* s1, char* s2);
  curl_strequal() and curl_strnequal() are subject for removal in a future libcurl, see lib/README.curlx for details

int curl_strnequal(char* s1, char* s2, size_t n);
  ditto

  curl_strequal() and curl_strnequal() are subject for removal in a future libcurl, see lib/README.curlx for details

struct curl_forms;
  structure to be used as parameter for CURLFORM_ARRAY

  CURLformoption option;

  char* value;

enum CurlFormAdd: int;
  use this for multipart formpost building

  Returns code for curl_formadd()

  Returns:
  CURL_FORMADD_OK on success CURL_FORMADD_MEMORY if the FormInfo allocation fails CURL_FORMADD_OPTION_TWICE if one option is given twice for one Form CURL_FORMADD_NULL if a null pointer was given for a char CURL_FORMADD_MEMORY if the allocation of a FormInfo struct failed CURL_FORMADD_UNKNOWN_OPTION if an unknown option was used CURL_FORMADD_INCOMPLETE if the some FormInfo is not complete (or error) CURL_FORMADD_MEMORY if a curl_httppost struct cannot be allocated CURL_FORMADD_MEMORY if some allocation for string copying failed. CURL_FORMADD_ILLEGAL_ARRAY if an illegal option is used in an array

  ok
    first, no error

  memory

  option_twice

  null_ptr

  unknown_option

  incomplete

  illegal_array

  disabled
    libcurl was built with this disabled

  last

alias CURLFORMcode = int;

CURLFORMcode curl_formadd(curl_httppost** httppost, curl_httppost** last_post, ...);
  Name:
  curl_formadd()

  Description:
  Pretty advanced function for building multi-part formposts. Each invoke adds one part that together construct a full post. Then use CURLOPT_HTTPPOST to send it off to libcurl.

alias curl_formget_callback = extern (C) uint function(void* arg, char* buf, uint len);
  callback function for curl_formget() The void *arg pointer will be the one passed as second argument to curl_formget(). The character buffer passed to it must not be freed. Should return the buffer length passed to it as the argument "len" on success.

int curl_formget(curl_httppost* form, void* arg, curl_formget_callback append);
  Name:
  curl_formget()

  Description:
  Serialize a curl_httppost struct built with curl_formadd(). Accepts a void pointer as second argument which will be passed to the curl_formget_callback function. Returns 0 on success.

void curl_formfree(curl_httppost* form);
  Name:
  curl_formfree()

  Description:
  Free a multipart formpost previously built with curl_formadd().

char* curl_getenv(char* variable);
  Name:
  curl_getenv()

  Description:
  Returns a malloc()'ed string that MUST be curl_free()ed after usage is complete. DEPRECATED - see lib/README.curlx

char* curl_version();
  Name:
  curl_version()

  Description:
  Returns a static ascii string of the libcurl version.

char* curl_easy_escape(CURL* handle, char* string, int length);
  Name:
  curl_easy_escape()

  Description:
  Escapes URL strings (converts all letters consider illegal in URLs to their %XX versions). This function returns a new allocated string or NULL if an error occurred.

char* curl_escape(char* string, int length);
  the previous version:

char* curl_easy_unescape(CURL* handle, char* string, int length, int* outlength);
  Name:
  curl_easy_unescape()

  Description:
  Unescapes URL encoding in strings (converts all %XX codes to their 8bit versions). This function returns a new allocated string or NULL if an error occurred. Conversion Note: On non-ASCII platforms the ASCII %XX codes are converted into the host encoding.

char* curl_unescape(char* string, int length);
  the previous version

void curl_free(void* p);
  Name:
  curl_free()

  Description:
  Provided for de-allocation in the same translation unit that did the allocation. Added in libcurl 7.10

CURLcode curl_global_init(c_long flags);
  Name:
  curl_global_init()

  Description:
  curl_global_init() should be invoked exactly once for each application that uses libcurl and before any call of other libcurl functions.

  This function is not thread-safe!

CURLcode curl_global_init_mem(c_long flags, curl_malloc_callback m, curl_free_callback f, curl_realloc_callback r, curl_strdup_callback s, curl_calloc_callback c);
  Name:
  curl_global_init_mem()

  Description:
  curl_global_init() or curl_global_init_mem() should be invoked exactly once for each application that uses libcurl. This function can be used to initialize libcurl and set user defined memory management callback functions. Users can implement memory management routines to check for memory leaks, check for mis-use of the curl library etc. User registered callback routines with be invoked by this library instead of the system memory management routines like malloc, free etc.

void curl_global_cleanup();
  Name:
  curl_global_cleanup()

  Description:
  curl_global_cleanup() should be invoked exactly once for each application that uses libcurl

struct curl_slist;
  linked-list structure for the CURLOPT_QUOTE option (and other)

curl_slist* curl_slist_append(curl_slist*, char*);
  Name:
  curl_slist_append()

  Description:
  Appends a string to a linked list. If no list exists, it will be created first. Returns the new list, after appending.

  linked-list structure for the CURLOPT_QUOTE option (and other)

void curl_slist_free_all(curl_slist*);
  Name:
  curl_slist_free_all()

  Description:
  free a previously built curl_slist.

  linked-list structure for the CURLOPT_QUOTE option (and other)

time_t curl_getdate(char* p, time_t* unused);
  Name:
  curl_getdate()

  Description:
  Returns the time, in seconds since 1 Jan 1970 of the time string given in the first argument. The time argument in the second parameter is unused and should be set to NULL.

  linked-list structure for the CURLOPT_QUOTE option (and other)

struct curl_certinfo;
  info about the certificate chain, only for OpenSSL builds. Asked for with CURLOPT_CERTINFO / CURLINFO_CERTINFO

  linked-list structure for the CURLOPT_QUOTE option (and other)

  int num_of_certs;
    number of certificates with information

  curl_slist** certinfo;
    for each index in this array, there's a linked list with textual information in the format "name: value"

int CURLINFO_STRING;

int CURLINFO_LONG;

int CURLINFO_DOUBLE;

int CURLINFO_SLIST;

int CURLINFO_MASK;

int CURLINFO_TYPEMASK;

enum CurlInfo: int;

  none

  effective_url

  response_code

  total_time

  namelookup_time

  connect_time

  pretransfer_time

  size_upload

  size_download

  speed_download

  speed_upload

  header_size

  request_size

  ssl_verifyresult

  filetime

  content_length_download

  content_length_upload

  starttransfer_time

  content_type

  redirect_time

  redirect_count

  private_info

  http_connectcode

  httpauth_avail

  proxyauth_avail

  os_errno

  num_connects

  ssl_engines

  cookielist

  lastsocket

  ftp_entry_path

  redirect_url

  primary_ip

  appconnect_time

  certinfo

  condition_unmet

  rtsp_session_id

  rtsp_client_cseq

  rtsp_server_cseq

  rtsp_cseq_recv

  primary_port

  local_ip

  local_port

  lastone
    Fill in new entries below here!

alias CURLINFO = int;

CurlInfo CURLINFO_HTTP_CODE;
  CURLINFO_RESPONSE_CODE is the new name for the option previously known as CURLINFO_HTTP_CODE

enum CurlClosePolicy: int;

  none

  oldest

  least_recently_used

  least_traffic

  slowest

  callback

  last

alias curl_closepolicy = int;

enum CurlGlobal: int;

  ssl

  win32

  all

  nothing

  default_
    all

enum CurlLockData: int;
  Setup defines, protos etc for the sharing stuff.

  Different data locks for a single share

  none

  share
    CURL_LOCK_DATA_SHARE is used internally to say that the locking is just made to change the internal state of the share itself.

  cookie

  dns

  ssl_session

  connect

  last

alias curl_lock_data = int;

enum CurlLockAccess: int;
  Different lock access types

  none
    unspecified action

  shared_access
    for read perhaps

  single
    for write perhaps

  last
    never use

alias curl_lock_access = int;

alias curl_lock_function = void function(void* handle, int data, int locktype, void* userptr);

alias curl_unlock_function = void function(void* handle, int data, void* userptr);

alias CURLSH = void;

enum CurlShError: int;

  ok
    all is fine

  bad_option
    1

  in_use
    2

  invalid
    3

  nomem
    out of memory

  last
    never use

alias CURLSHcode = int;

enum CurlShOption: int;
  pass in a user data pointer used in the lock/unlock callback functions

  none
    don't use

  share
    specify a data type to share

  unshare
    specify which data type to stop sharing

  lockfunc
    pass in a 'curl_lock_function' pointer

  unlockfunc
    pass in a 'curl_unlock_function' pointer

  userdata
    pass in a user data pointer used in the lock/unlock callback functions

  last
    never use

alias CURLSHoption = int;

CURLSH* curl_share_init();

CURLSHcode curl_share_setopt(CURLSH*, CURLSHoption option, ...);

CURLSHcode curl_share_cleanup(CURLSH*);

enum CurlVer: int;
  Structures for querying information about the curl library at runtime.

  first

  second

  third

  fourth

  last

alias CURLversion = int;

CurlVer CURLVERSION_NOW;
  The 'CURLVERSION_NOW' is the symbolic name meant to be used by basically all programs ever that want to get version information. It is meant to be a built-in version number for what kind of struct the caller expects. If the struct ever changes, we redefine the NOW to another enum from above.

struct _N28;

  CURLversion age;
    age of the returned struct

  char* version_;
    LIBCURL_VERSION

  uint version_num;
    LIBCURL_VERSION_NUM

  char* host;
    OS/host/cpu/machine when configured

  int features;
    bitmask, see defines below

  char* ssl_version;
    human readable string

  c_long ssl_version_num;
    not used anymore, always 0

  char* libz_version;
    human readable string

  char** protocols;
    protocols is terminated by an entry with a NULL protoname

  char* ares;
    The fields below this were added in CURLVERSION_SECOND

  char* libidn;
    This field was added in CURLVERSION_THIRD

  int iconv_ver_num;
    These field were added in CURLVERSION_FOURTH

    Same as 'libiconv_version' if built with HAVE_ICONV

  char* libssh_version;
    human readable string

alias curl_version_info_data = _N28;

enum CurlVersion: int;

  ipv6
    IPv6-enabled

  kerberos4
    kerberos auth is supported

  ssl
    SSL options are present

  libz
    libz features are present

  ntlm
    NTLM auth is supported

  gssnegotiate
    Negotiate auth support

  dbg
    built with debug capabilities

  asynchdns
    asynchronous dns resolves

  spnego
    SPNEGO auth

  largefile
    supports files bigger than 2GB

  idn
    International Domain Names support

  sspi
    SSPI is supported

  conv
    character conversions supported

  curldebug
    debug memory tracking supported

  tlsauth_srp
    TLS-SRP auth is supported

curl_version_info_data* curl_version_info(CURLversion);
  Name:
  curl_version_info()

  Description:
  This function returns a pointer to a static copy of the version info struct. See above.

char* curl_easy_strerror(CURLcode);
  Name:
  curl_easy_strerror()

  Description:
  The curl_easy_strerror function may be used to turn a CURLcode value into the equivalent human readable error string. This is useful for printing meaningful error messages.

char* curl_share_strerror(CURLSHcode);
  Name:
  curl_share_strerror()

  Description:
  The curl_share_strerror function may be used to turn a CURLSHcode value into the equivalent human readable error string. This is useful for printing meaningful error messages.

CURLcode curl_easy_pause(CURL* handle, int bitmask);
  Name:
  curl_easy_pause()

  Description:
  The curl_easy_pause function pauses or unpauses transfers. Select the new state by setting the bitmask, use the convenience defines below.

enum CurlPause: int;

  recv

  recv_cont

  send

  send_cont

  all

  cont

CURL* curl_easy_init();

CURLcode curl_easy_setopt(CURL* curl, CURLoption option, ...);

CURLcode curl_easy_perform(CURL* curl);

void curl_easy_cleanup(CURL* curl);

CURLcode curl_easy_getinfo(CURL* curl, CURLINFO info, ...);
  Name:
  curl_easy_getinfo()

  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 * or a pointer to a double (as the documentation describes elsewhere). The data pointed to will be filled in accordingly and can be relied upon only if the function returns CURLE_OK. This function is intended to get used *AFTER* a performed transfer, all results from this function are undefined until the transfer is completed.

CURL* curl_easy_duphandle(CURL* curl);
  Name:
  curl_easy_duphandle()

  Description:
  Creates a new curl session handle with the same options set for the handle passed in. Duplicating a handle could only be a matter of cloning data and options, internal state info and things like persistant connections cannot be transfered. It is useful in multithreaded applications when you can run curl_easy_duphandle() for each new thread to avoid a series of identical curl_easy_setopt() invokes in every thread.

void curl_easy_reset(CURL* curl);
  Name:
  curl_easy_reset()

  Description:
  Re-initializes a CURL handle to the default values. This puts back the handle to the same state as it was in when it was just created.

  It does keep: live connections, the Session ID cache, the DNS cache and the cookies.

CURLcode curl_easy_recv(CURL* curl, void* buffer, size_t buflen, size_t* n);
  Name:
  curl_easy_recv()

  Description:
  Receives data from the connected socket. Use after successful curl_easy_perform() with CURLOPT_CONNECT_ONLY option.

CURLcode curl_easy_send(CURL* curl, void* buffer, size_t buflen, size_t* n);
  Name:
  curl_easy_send()

  Description:
  Sends data over the connected socket. Use after successful curl_easy_perform() with CURLOPT_CONNECT_ONLY option.

alias CURLM = void;

enum CurlM: int;

  call_multi_perform
    please call curl_multi_perform() or curl_multi_socket*() soon

  ok

  bad_handle
    the passed-in handle is not a valid CURLM handle

  bad_easy_handle
    an easy handle was not good/valid

  out_of_memory
    if you ever get this, you're in deep sh*t

  internal_error
    this is a libcurl bug

  bad_socket
    the passed in socket argument did not match

  unknown_option
    curl_multi_setopt() with unsupported option

  last

alias CURLMcode = int;

CurlM CURLM_CALL_MULTI_SOCKET;
  just to make code nicer when using curl_multi_socket() you can now check for CURLM_CALL_MULTI_SOCKET too in the same style it works for curl_multi_perform() and CURLM_CALL_MULTI_PERFORM

enum CurlMsg: int;

  none

  done
    This easy handle has completed. 'result' contains the CURLcode of the transfer

  last
    no used

alias CURLMSG = int;

union _N31;

  void* whatever;
    message-specific data

  CURLcode result;
    return code for transfer

struct CURLMsg;

  CURLMSG msg;
    what this message means

  CURL* easy_handle;
    the handle it concerns

  _N31 data;

CURLM* curl_multi_init();
  Name:
  curl_multi_init()

  Desc:
  inititalize multi-style curl usage

  Returns:
  a new CURLM handle to use in all 'curl_multi' functions.

CURLMcode curl_multi_add_handle(CURLM* multi_handle, CURL* curl_handle);
  Name:
  curl_multi_add_handle()

  Desc:
  add a standard curl handle to the multi stack

  Returns:
  CURLMcode type, general multi error code.

CURLMcode curl_multi_remove_handle(CURLM* multi_handle, CURL* curl_handle);
  Name:
  curl_multi_remove_handle()

  Desc:
  removes a curl handle from the multi stack again

  Returns:
  CURLMcode type, general multi error code.

alias fd_set = int;
  Name:
  curl_multi_fdset()

  Desc:
  Ask curl for its fd_set sets. The app can use these to select() or poll() on. We want curl_multi_perform() called as soon as one of them are ready.

  Returns:
  CURLMcode type, general multi error code.

  tmp decl

CURLMcode curl_multi_fdset(CURLM* multi_handle, fd_set* read_fd_set, fd_set* write_fd_set, fd_set* exc_fd_set, int* max_fd);

CURLMcode curl_multi_perform(CURLM* multi_handle, int* running_handles);
  Name:
  curl_multi_perform()

  Desc:
  When the app thinks there's data available for curl it calls this function to read/write whatever there is right now. This returns as soon as the reads and writes are done. This function does not require that there actually is data available for reading or that data can be written, it can be called just in case. It returns the number of handles that still transfer data in the second argument's integer-pointer.

  Returns:
  CURLMcode type, general multi error code. *NOTE* that this only returns errors etc regarding the whole multi stack. There might still have occurred problems on invidual transfers even when this returns OK.

CURLMcode curl_multi_cleanup(CURLM* multi_handle);
  Name:
  curl_multi_cleanup()

  Desc:
  Cleans up and removes a whole multi stack. It does not free or touch any individual easy handles in any way. We need to define in what state those handles will be if this function is called in the middle of a transfer.

  Returns:
  CURLMcode type, general multi error code.

CURLMsg* curl_multi_info_read(CURLM* multi_handle, int* msgs_in_queue);
  Name:
  curl_multi_info_read()

  Desc:
  Ask the multi handle if there's any messages/informationals from the individual transfers. Messages include informationals such as error code from the transfer or just the fact that a transfer is completed. More details on these should be written down as well.

  Repeated calls to this function will return a new struct each time, until a special "end of msgs" struct is returned as a signal that there is no more to get at this point.

  The data the returned pointer points to will not survive calling curl_multi_cleanup().

  The 'CURLMsg' struct is meant to be very simple and only contain very basic informations. If more involved information is wanted, we will provide the particular "transfer handle" in that struct and that should/could/would be used in subsequent curl_easy_getinfo() calls (or similar). The point being that we must never expose complex structs to applications, as then we'll undoubtably get backwards compatibility problems in the future.

  Returns:
  A pointer to a filled-in struct, or NULL if it failed or ran out of structs. It also writes the number of messages left in the queue (after this read) in the integer the second argument points to.

char* curl_multi_strerror(CURLMcode);
  Name:
  curl_multi_strerror()

  Desc:
  The curl_multi_strerror function may be used to turn a CURLMcode value into the equivalent human readable error string. This is useful for printing meaningful error messages.

  Returns:
  A pointer to a zero-terminated error message.

enum CurlPoll: int;
  Name:
  curl_multi_socket() and curl_multi_socket_all()

  Desc:
  An alternative version of curl_multi_perform() that allows the application to pass in one of the file descriptors that have been detected to have "action" on them and let libcurl perform. See man page for details.

  none_
    jdrewsen - underscored in order not to clash with reserved D symbols

  in_

  out_

  inout_

  remove_

alias CURL_SOCKET_TIMEOUT = CURL_SOCKET_BAD;

enum CurlCSelect: int;

  in_
    jdrewsen - underscored in order not to clash with reserved D symbols

  out_

  err_

alias curl_socket_callback = extern (C) int function(void* easy, socket_t s, int what, void* userp, void* socketp);
  private socket pointer

alias curl_multi_timer_callback = extern (C) int function(void* multi, int timeout_ms, void* userp);
  private callback pointer

  Name:
  curl_multi_timer_callback

  Desc:
  Called by libcurl whenever the library detects a change in the maximum number of milliseconds the app is allowed to wait before curl_multi_socket() or curl_multi_perform() must be called (to allow libcurl's timed events to take place).

  Returns:
  The callback should return zero.

  private callback pointer

CURLMcode curl_multi_socket(CURLM* multi_handle, curl_socket_t s, int* running_handles);
  ditto

  Name:
  curl_multi_timer_callback

  Desc:
  Called by libcurl whenever the library detects a change in the maximum number of milliseconds the app is allowed to wait before curl_multi_socket() or curl_multi_perform() must be called (to allow libcurl's timed events to take place).

  Returns:
  The callback should return zero.

  private callback pointer

CURLMcode curl_multi_socket_action(CURLM* multi_handle, curl_socket_t s, int ev_bitmask, int* running_handles);
  ditto

  Name:
  curl_multi_timer_callback

  Desc:
  Called by libcurl whenever the library detects a change in the maximum number of milliseconds the app is allowed to wait before curl_multi_socket() or curl_multi_perform() must be called (to allow libcurl's timed events to take place).

  Returns:
  The callback should return zero.

  private callback pointer

CURLMcode curl_multi_socket_all(CURLM* multi_handle, int* running_handles);
  ditto

  Name:
  curl_multi_timer_callback

  Desc:
  Called by libcurl whenever the library detects a change in the maximum number of milliseconds the app is allowed to wait before curl_multi_socket() or curl_multi_perform() must be called (to allow libcurl's timed events to take place).

  Returns:
  The callback should return zero.

  private callback pointer

CURLMcode curl_multi_timeout(CURLM* multi_handle, c_long* milliseconds);
  This macro below was added in 7.16.3 to push users who recompile to use the new curl_multi_socket_action() instead of the old curl_multi_socket()

  Name:
  curl_multi_timeout()

  Desc:
  Returns the maximum number of milliseconds the app is allowed to wait before curl_multi_socket() or curl_multi_perform() must be called (to allow libcurl's timed events to take place).

  Returns:
  CURLM error code.

enum CurlMOption: int;

  socketfunction
    This is the socket callback function pointer

  socketdata
    This is the argument passed to the socket callback

  pipelining
    set to 1 to enable pipelining for this multi handle

  timerfunction
    This is the timer callback function pointer

  timerdata
    This is the argument passed to the timer callback

  maxconnects
    maximum number of entries in the connection cache

  lastentry

alias CURLMoption = int;

CURLMcode curl_multi_setopt(CURLM* multi_handle, CURLMoption option, ...);
  Name:
  curl_multi_setopt()

  Desc:
  Sets options for the multi handle.

  Returns:
  CURLM error code.

CURLMcode curl_multi_assign(CURLM* multi_handle, curl_socket_t sockfd, void* sockp);
  Name:
  curl_multi_assign()

  Desc:
  This function sets an association in the multi handle between the given socket and a private pointer of the application. This is (only) useful for curl_multi_socket uses.

  Returns:
  CURLM error code.

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