Module: Curl¶

Simple support for many network protocols with libcurl

This module provides support for libcurl, enabling Chapel programs to work with many network protocols.

The curl homepage describes libcurl thus:

libcurl is a free and easy-to-use client-side URL transfer library, supporting
DICT, FILE, FTP, FTPS, Gopher, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, POP3,
POP3S, RTMP, RTSP, SCP, SFTP, SMTP, SMTPS, Telnet and TFTP.  libcurl supports
SSL certificates, HTTP POST, HTTP PUT, FTP uploading, HTTP form based upload,
proxies, cookies, user+password authentication (Basic, Digest, NTLM,
Negotiate, Kerberos), file transfer resume, http proxy tunneling and more!

Dependencies¶

The Curl functionality in Chapel is dependent on libcurl. For information on how to install libcurl, see the curl installation instructions

The environment variables CHPL_AUXIO_INCLUDE and CHPL_AUXIO_LIBS must be set to point to the include and lib directories for libcurl respectively. More information on these variables can be found in auxIO.rst

Note

If libcurl is installed system-wide you should not need to set these variables.

Enabling Curl Support¶

Once you have ensured that libcurl is installed, and have the two variables above defined, set the environment variable CHPL_AUX_FILESYS to ‘curl’ to enable Curl support:

export CHPL_AUX_FILESYS=curl

Then, rebuild Chapel by executing ‘make’ from $CHPL_HOME:

make

Note

If Curl support is not enabled (which is the default), all features described below will compile successfully but will result in an error at runtime, saying: “No Curl Support”.

For information on how to enable and use Curl while also using other auxiliary IO extensions, as well as how to setup the CHPL_AUXIO_INCLUDE and CHPL_AUXIO_LIBS environment variables see doc/technotes/auxIO.rst in a Chapel release.

Using Curl Support in Chapel¶

Chapel support for libcurl exposes two interfaces:

A standard file I/O interface
Bindings to libcurl’s curl_easy_setopt and curl_easy_perform

Interface 1:

Since we do not support multiple readers on the same Curl handle, it is recommended that Chapel programs use openreader and openwriter in order to open up channels on a URL. Examples of how openreader and openwriter work can be found below. You may also open up a curl handle on a URL via open (url=..., mode=...), and then open up channels, or use the second interface described below to set options on that handle before opening up a channel on the handle. Note that in this last case, Chapel programs must not open multiple channels for the same file backed by a curl handle.

Note

The URL is the last parameter to open. Therefore when you are opening a URL if you are not using all of the parameters for open() or openreader/openwriter, you MUST specify all arguments by name, e.g.:

open(url="http://example.com", iomode.r);

will result in a compile time error. You would, instead, need to use:

open(url="http://example.com", mode=iomode.r).

Interface 2:

Many times when we are connecting to a URL (FTP, IMAP, SMTP, HTTP) we have to give extra information to the Curl handle. This is done via the setopt() interface. Documentation on the various options, as well as the functions that are referenced below can be found here

Types:

slist

Methods:

slist.append

slist.free

file.setopt

file.perform

Calling close on the file will disconnect the underlying Curl handle.

Here are some simple code snippets demonstrating these two interfaces:

Example 1¶

// This example uses the first interface

var writer = openwriter("out.txt");
// Open a URL and get a reader on a section of the site
var reader = openreader(url="http://example.com");

var str:string;

// While we can read a line from example.com, write it to 'out.txt'
while(reader.readline(str)) do
  writer.write(str);

Example 2¶

// This example uses the first interface
var str:string;
var reader = openreader(url="http://example.com");
reader.readstring(str);
reader.close();

// Write out to a URL via Curl
var writer = openwriter("http://127.0.0.1:1080");
writer.write(str);
writer.close();

Example 3¶

// Open a file on our local file system
var f = openwriter("out.txt");
// Now get a curl handle
var c = openreader(url="http://example.com");
var str:string;

// Read from example.com and write it out to out.txt
c.readstring(str);
f.write(str);

// Disconnect and free the curl handle and channel, and close the local file and
// channel
c.close();
f.close();

Example 4¶

// This example uses the second interface

// Open a file with a curl handle as the internal file
var c = open(url="http://example.com", mode=iomode.r);
// do a standard perform operation on the underlying curl handle
c.perform(); // This will print to stdout
// disconnect and free the curl handle
c.close();

Example 5¶

// This example uses the second interface + the first interface

var c = open(url="http://example.com", mode=iomode.r);
var str:string;
// Set verbose output from curl
c.setopt(curlopt_verbose, true);

// now read into the string
var reader = c.reader();
reader.readstring(str);
writeln(str);
reader.close();
c.close();

Example 6¶

// Connect to an IMAP site, and fetch mail from the inbox
config const username = "user";
config const password = "xxxx";
config const imapSite = "your_imap_site_here";

var handle = open(url=imapSite+"/INBOX/;UID=1", mode=iomode.r);
var reader = handle.reader();
var str:string;

handle.setopt((curlopt_username, username),
              (curlopt_password, password));

//Calling this would give the same output
// handle.perform();

reader.readstring(str);
write(str);

reader.close();
handle.close();

Example 7¶

// This example shows a more complex example of how the two interfaces can work
// together: We use the second (setopt) interface to set the various options we
// need on a given curl handle, and then open a writer on that handle to write
// out via curl.

config const url      = "smtp goes here";

config const from     = "<some-email>";
config const to       = "<some-email>";
config const cc       = "<some-email>";

config const username = "username";
config const password = "password";

config const subject  = "Testing Curl in Chapel (SMTP)";
config const message  = "Hello! This is a message sent via Chapel!";


var handle = open(url=url, mode=iomode.cw);

var recipients:slist;
recipients.append(to);
recipients.append(cc);

var arr = "To: " + to + "\r\n" +
          "From: " + from + "\r\n" +
          "Cc: " + cc + "\r\n" +
          "Subject: " + subject + "\r\n" + "\r\n" + message;


handle.setopt((curlopt_username       , username),
              (curlopt_password       , password),
              (curlopt_mail_from      , from),
              (curlopt_use_ssl        , 3),
              (curlopt_ssl_verifypeer , false),
              (curlopt_ssl_verifyhost , false),
              (curlopt_mail_rcpt      , recipients.list),
              (curlopt_verbose        , true));

// Create a writer on the curl handle.
var writer = handle.writer();

// Now write out to Curl to send the email
writer.write(arr);

// recipients.free(); // BAD: This will free the data while it is in use!
writer.close();
// Note here how we free the slist AFTER we close the writer. This way we can
// ensure that we do not free data that is currently in use by curl.
recipients.free();
handle.close();

Curl Support Types and Functions¶

proc file.setopt(opt: c_int, arg): bool¶

This function is the equivalent to the curl_easy_setopt function in libcurl. It sets information on the curl file handle that can change libcurl’s behavior.

Arguments:	opt – the curl option to set. This file makes available lower case versions of these curl options (e.g. use curlopt_url instead of CURLOPT_URL in your Chapel program) arg : int, string, bool, or slist – the value to set the curl option specified by opt.

proc file.setopt(args ...?k)

Set curl options on a curl file. It is equivalent to the curl_setopt_array you might find in PHP.

For example, you might do:

curlfile.setopt((curlopt_username, username),
                (curlopt_password, password));

Arguments:	args – any number of tuples of the form (curl_option, value). For each curl_option, this function will setopt it to its value.

proc file.perform(): bool¶

Perform any blocking file transfer operations on the curl file. This function calls curl_easy_perform.

Corresponds to curl_easy_perform where the file has been opened up by specifying that url=<some url>.

Returns:	true on success. This version halts if an error is encountered, but future versions will support returning an error code instead of halting.

record slist¶: A linked list of strings used in many curl setopt calls. This type corresponds to the libcurl type curl_slist.

Note

The slist type is not reference counted. Therefore the user is responsible for freeing the slist when they are done with it with slist.free.

proc slist.append(str: string)¶

Append the string argument to an slist. This function is the same as calling curl_slist_append

This function halts if an error is encountered. Future versions will support returning an error code instead of halting.

Arguments:	str – a string argument to append

proc slist.free()¶: Free an slist. Chapel programs must call this function after using an slist. Programs must ensure that there are no ongoing connections using this slist when it is freed. For an example, see Example 7.

const curlopt_file: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_WRITEDATA.html

const curlopt_url: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_URL.html

const curlopt_port: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PORT.html

const curlopt_proxy: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PROXY.html

const curlopt_userpwd: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_USERPWD.html

const curlopt_proxyuserpwd: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PROXYUSERPWD.html

const curlopt_range: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_RANGE.html

const curlopt_infile: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_READDATA.html

const curlopt_errorbuffer: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_ERRORBUFFER.html

const curlopt_writefunction: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_WRITEFUNCTION.html

const curlopt_readfunction: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_READFUNCTION.html

const curlopt_timeout: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_TIMEOUT.html

const curlopt_infilesize: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_INFILESIZE.html

const curlopt_postfields: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_POSTFIELDS.html

const curlopt_referer: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_REFERER.html

const curlopt_ftpport: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FTPPORT.html

const curlopt_useragent: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_USERAGENT.html

const curlopt_low_speed_limit: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_LOW_SPEED_LIMIT.html

const curlopt_low_speed_time: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_LOW_SPEED_TIME.html

const curlopt_resume_from: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_RESUME_FROM.html

const curlopt_cookie: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_COOKIE.html

const curlopt_httpheader: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_HTTPHEADER.html

const curlopt_httppost: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_HTTPPOST.html

const curlopt_sslcert: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSLCERT.html

const curlopt_keypasswd: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_KEYPASSWD.html

const curlopt_crlf: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_CRLF.html

const curlopt_quote: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_QUOTE.html

const curlopt_writeheader: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_HEADERDATA.html

const curlopt_cookiefile: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_COOKIEFILE.html

const curlopt_sslversion: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSLVERSION.html

const curlopt_timecondition: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_TIMECONDITION.html

const curlopt_timevalue: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_TIMEVALUE.html

const curlopt_customrequest: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_CUSTOMREQUEST.html

const curlopt_stderr: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_STDERR.html

const curlopt_postquote: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_POSTQUOTE.html

const curlopt_writeinfo: c_int¶: This curlopt setting is deprecated

const curlopt_verbose: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_VERBOSE.html

const curlopt_header: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_HEADER.html

const curlopt_noprogress: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_NOPROGRESS.html

const curlopt_nobody: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_NOBODY.html

const curlopt_failonerror: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FAILONERROR.html

const curlopt_upload: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_UPLOAD.html

const curlopt_post: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_POST.html

const curlopt_dirlistonly: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_DIRLISTONLY.html

const curlopt_append: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_APPEND.html

const curlopt_netrc: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_NETRC.html

const curlopt_followlocation: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FOLLOWLOCATION.html

const curlopt_transfertext: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_TRANSFERTEXT.html

const curlopt_put: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PUT.html

const curlopt_progressfunction: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PROGRESSFUNCTION.html

const curlopt_progressdata: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PROGRESSDATA.html

const curlopt_autoreferer: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_AUTOREFERER.html

const curlopt_proxyport: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PROXYPORT.html

const curlopt_postfieldsize: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_POSTFIELDSIZE.html

const curlopt_httpproxytunnel: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_HTTPPROXYTUNNEL.html

const curlopt_interface: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_INTERFACE.html

const curlopt_krblevel: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_KRBLEVEL.html

const curlopt_ssl_verifypeer: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSL_VERIFYPEER.html

const curlopt_cainfo: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_CAINFO.html

const curlopt_maxredirs: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_MAXREDIRS.html

const curlopt_filetime: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FILETIME.html

const curlopt_telnetoptions: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_TELNETOPTIONS.html

const curlopt_maxconnects: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_MAXCONNECTS.html

const curlopt_closepolicy: c_int¶: This option is deprecated

const curlopt_fresh_connect: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FRESH_CONNECT.html

const curlopt_forbid_reuse: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FORBID_REUSE.html

const curlopt_random_file: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_RANDOM_FILE.html

const curlopt_egdsocket: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_EGDSOCKET.html

const curlopt_connecttimeout: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_CONNECTTIMEOUT.html

const curlopt_headerfunction: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_HEADERFUNCTION.html

const curlopt_httpget: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_HTTPGET.html

const curlopt_ssl_verifyhost: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSL_VERIFYHOST.html

const curlopt_cookiejar: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_COOKIEJAR.html

const curlopt_ssl_cipher_list: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSL_CIPHER_LIST.html

const curlopt_http_version: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_HTTP_VERSION.html

const curlopt_ftp_use_epsv: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FTP_USE_EPSV.html

const curlopt_sslcerttype: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSLCERTTYPE.html

const curlopt_sslkey: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSLKEY.html

const curlopt_sslkeytype: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSLKEYTYPE.html

const curlopt_sslengine: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSLENGINE.html

const curlopt_sslengine_default: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSLENGINE_DEFAULT.html

const curlopt_dns_use_global_cache: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_DNS_USE_GLOBAL_CACHE.html

const curlopt_dns_cache_timeout: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_DNS_CACHE_TIMEOUT.html

const curlopt_prequote: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PREQUOTE.html

const curlopt_debugfunction: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_DEBUGFUNCTION.html

const curlopt_debugdata: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_DEBUGDATA.html

const curlopt_cookiesession: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_COOKIESESSION.html

const curlopt_capath: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_CAPATH.html

const curlopt_buffersize: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_BUFFERSIZE.html

const curlopt_nosignal: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_NOSIGNAL.html

const curlopt_share: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SHARE.html

const curlopt_proxytype: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PROXYTYPE.html

const curlopt_encoding: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_ACCEPT_ENCODING.html

const curlopt_private: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PRIVATE.html

const curlopt_http200aliases: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_HTTP200ALIASES.html

const curlopt_unrestricted_auth: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_UNRESTRICTED_AUTH.html

const curlopt_ftp_use_eprt: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FTP_USE_EPRT.html

const curlopt_httpauth: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_HTTPAUTH.html

const curlopt_ssl_ctx_function: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSL_CTX_FUNCTION.html

const curlopt_ssl_ctx_data: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSL_CTX_DATA.html

const curlopt_ftp_create_missing_dirs: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FTP_CREATE_MISSING_DIRS.html

const curlopt_proxyauth: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PROXYAUTH.html

const curlopt_ftp_response_timeout: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FTP_RESPONSE_TIMEOUT.html

const curlopt_ipresolve: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_IPRESOLVE.html

const curlopt_maxfilesize: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_MAXFILESIZE.html

const curlopt_infilesize_large: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_INFILESIZE_LARGE.html

const curlopt_resume_from_large: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_RESUME_FROM_LARGE.html

const curlopt_maxfilesize_large: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_MAXFILESIZE_LARGE.html

const curlopt_netrc_file: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_NETRC_FILE.html

const curlopt_use_ssl: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_USE_SSL.html

const curlopt_postfieldsize_large: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_POSTFIELDSIZE_LARGE.html

const curlopt_tcp_nodelay: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_TCP_NODELAY.html

const curlopt_ftpsslauth: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FTPSSLAUTH.html

const curlopt_ioctlfunction: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_IOCTLFUNCTION.html

const curlopt_ioctldata: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_IOCTLDATA.html

const curlopt_ftp_account: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FTP_ACCOUNT.html

const curlopt_cookielist: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_COOKIELIST.html

const curlopt_ignore_content_length: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_IGNORE_CONTENT_LENGTH.html

const curlopt_ftp_skip_pasv_ip: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FTP_SKIP_PASV_IP.html

const curlopt_ftp_filemethod: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FTP_FILEMETHOD.html

const curlopt_localport: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_LOCALPORT.html

const curlopt_localportrange: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_LOCALPORTRANGE.html

const curlopt_connect_only: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_CONNECT_ONLY.html

const curlopt_conv_from_network_function: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_CONV_FROM_NETWORK_FUNCTION.html

const curlopt_conv_to_network_function: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_CONV_TO_NETWORK_FUNCTION.html

const curlopt_conv_from_utf8_function: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_CONV_FROM_UTF8_FUNCTION.html

const curlopt_max_send_speed_large: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_MAX_SEND_SPEED_LARGE.html

const curlopt_max_recv_speed_large: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_MAX_RECV_SPEED_LARGE.html

const curlopt_ftp_alternative_to_user: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FTP_ALTERNATIVE_TO_USER.html

const curlopt_sockoptfunction: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SOCKOPTFUNCTION.html

const curlopt_sockoptdata: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SOCKOPTDATA.html

const curlopt_ssl_sessionid_cache: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSL_SESSIONID_CACHE.html

const curlopt_ssh_auth_types: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSH_AUTH_TYPES.html

const curlopt_ssh_public_keyfile: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSH_PUBLIC_KEYFILE.html

const curlopt_ssh_private_keyfile: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSH_PRIVATE_KEYFILE.html

const curlopt_ftp_ssl_ccc: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_FTP_SSL_CCC.html

const curlopt_timeout_ms: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_TIMEOUT_MS.html

const curlopt_connecttimeout_ms: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_CONNECTTIMEOUT_MS.html

const curlopt_http_transfer_decoding: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_HTTP_TRANSFER_DECODING.html

const curlopt_http_content_decoding: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_HTTP_CONTENT_DECODING.html

const curlopt_new_file_perms: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_NEW_FILE_PERMS.html

const curlopt_new_directory_perms: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_NEW_DIRECTORY_PERMS.html

const curlopt_postredir: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_POSTREDIR.html

const curlopt_ssh_host_public_key_md5: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SSH_HOST_PUBLIC_KEY_MD5.html

const curlopt_opensocketfunction: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_OPENSOCKETFUNCTION.html

const curlopt_opensocketdata: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_OPENSOCKETDATA.html

const curlopt_copypostfields: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_COPYPOSTFIELDS.html

const curlopt_proxy_transfer_mode: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PROXY_TRANSFER_MODE.html

const curlopt_seekfunction: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SEEKFUNCTION.html

const curlopt_seekdata: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SEEKDATA.html

const curlopt_crlfile: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_CRLFILE.html

const curlopt_issuercert: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_ISSUERCERT.html

const curlopt_address_scope: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_ADDRESS_SCOPE.html

const curlopt_certinfo: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_CERTINFO.html

const curlopt_username: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_USERNAME.html

const curlopt_password: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PASSWORD.html

const curlopt_proxyusername: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PROXYUSERNAME.html

const curlopt_proxypassword: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PROXYPASSWORD.html

const curlopt_noproxy: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_NOPROXY.html

const curlopt_tftp_blksize: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_TFTP_BLKSIZE.html

const curlopt_socks5_gssapi_service: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SOCKS5_GSSAPI_SERVICE.html

const curlopt_socks5_gssapi_nec: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_SOCKS5_GSSAPI_NEC.html

const curlopt_protocols: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_PROTOCOLS.html

const curlopt_redir_protocols: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_REDIR_PROTOCOLS.html

const curlopt_lastentry: c_int¶: All other curlopt values will be less than this one

const curlopt_mail_from: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_MAIL_FROM.html

const curlopt_mail_rcpt: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_MAIL_RCPT.html

const curlopt_mail_auth: c_int¶: See http://curl.haxx.se/libcurl/c/CURLOPT_MAIL_AUTH.html