# Perl6 LibCurl [![Build Status](https://travis-ci.org/CurtTilmes/perl6-libcurl.svg)](https://travis-ci.org/CurtTilmes/perl6-libcurl) [Simple Examples](#simple-examples) [Options](#options) [Header Options](#header-options) [Special Options](#special-options) [Errors](#errors) [Info](#info) [Received headers](#received-header-fields) [Content](#content) [Proxies](#proxies) [Multi](#multi) A [Perl 6](https://perl6.org/) interface to [libcurl](https://curl.haxx.se/libcurl/). 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! libcurl is highly portable, it builds and works identically on numerous platforms, including Solaris, NetBSD, FreeBSD, OpenBSD, Darwin, HPUX, IRIX, AIX, Tru64, Linux, UnixWare, HURD, Windows, Amiga, OS/2, BeOs, Mac OS X, Ultrix, QNX, OpenVMS, RISC OS, Novell NetWare, DOS and more... libcurl is free, thread-safe, IPv6 compatible, feature rich, well supported, fast, thoroughly documented and is already used by many known, big and successful companies and numerous applications. ## Simple Examples use LibCurl::Easy; # GET print LibCurl::Easy.new(URL => 'http://example.com').perform.content; # GET (download a file) LibCurl::Easy.new(URL => 'http://example.com/somefile', download => 'somefile').perform; # HEAD say LibCurl::Easy.new(:nobody, URL => 'http://example.com') .perform.response-code; # PUT (upload a file) LibCurl::Easy.new(URL => 'http://example.com/somefile', upload => 'somefile').perform; # PUT (content from a string) LibCurl::Easy.new(URL => 'http://example.com/somefile', send => 'My Content').perform; # DELETE LibCurl::Easy.new(URL => 'http://example.com/file-to-delete', customrequest => 'DELETE').perform; # POST LibCurl::Easy.new(URL => 'http://example.com/form.html', postfields => 'name=foo&opt=value').perform; ## LibCurl::HTTP If even those aren't easy enough, there is a tiny sub-class **LibCurl::HTTP** that adds aliases for the common HTTP methods: use LibCurl::HTTP; my $http = LibCurl::HTTP.new; say $http.GET('http://example.com').perform.content; say $http.GET('http://example.com', 'myfile').perform.response-code; say $http.HEAD('http://example.com').perform.response-code; $http.DELETE('http://example.com').perform; $http.PUT('http://example.com', 'myfile').perform; $http.POST('http://example.com/form.html', 'name=foo&opt=value').perform; LibCurl::HTTP methods also enable `failonerror` by default, so any HTTP response >= 400 will throw an error. You can even import very simple subroutines ala [WWW](https://github.com/zoffixznet/perl6-WWW): use LibCurl::HTTP :subs; # Just GET content (will return Failure on failure): say get 'https://httpbin.org/get?foo=42&bar=x'; # GET and decode received data as JSON: say jget('https://httpbin.org/get?foo=42&bar=x'); # POST content (query args are OK; pass form as named args) say post 'https://httpbin.org/post?foo=42&bar=x', :some
, :42args; # And if you need headers, pass them inside a positional Hash: say post 'https://httpbin.org/post?foo=42&bar=x', %(:Some), :some, :42args; # Same POST as above + decode response as JSON say jpost('https://httpbin.org/post', :some); ## Fancier Example my $curl = LibCurl::Easy.new(:verbose, :followlocation); $curl.setopt(URL => 'http://example.com', download => './myfile.html'); $curl.perform; say $curl.success; say $curl.Content-Type; say $curl.Content-Length; say $curl.Date; say $curl.response-code; say $curl.statusline; Of course the full power of [libcurl](https://curl.haxx.se/libcurl) is available, so you aren't limited to HTTP URLs, you can use FTP, SMTP, TFTP, SCP, SFTP, and many, many more. ## Options Many of the libcurl [options](https://curl.haxx.se/libcurl/c/curl_easy_setopt.html) are available, mostly just skip the ```CURLOPT_```, lowercase, and use '-' instead of '_'. For example, instead of ```CURLOPT_ACCEPT_ENCODING```, use ```accept-encoding```. When the options are really boolean (set to 1 to enable and 0 to disable), you can treat them like Perl booleans if you want, ```:option``` to enable, and ```:!option``` to disable. Just like libcurl, the primary option is [URL](https://curl.haxx.se/libcurl/c/CURLOPT_URL.html), and can take many forms depending on the desired protocol. Options can be set on a handle either on initial creation with ```new()```, or later with ```.setopt()```. As a convenience, you can also just treat them like normal object methods. These are all equivalent: my $curl = LibCurl::Easy.new(:verbose, :followlocation, URL => 'http://example.com'); $curl.setopt(:verbose, followlocation => 1); $curl.setopt(URL => 'http://example.com'); $curl.verbose(1); $curl.followlocation(1); $curl.URL('http://example.com'); ```postfields``` is actually [CURLOPT_COPYPOSTFIELDS](https://curl.haxx.se/libcurl/c/CURLOPT_COPYPOSTFIELDS.html) so it will always copy the fields. Some of the normal options have **_LARGE** versions. LibCurl always maps the option to the **_LARGE** option where they exist, so you don't have to worry about overflows. These are the current options (If you want one not in this list, let me know): [CAinfo](https://curl.haxx.se/libcurl/c/CURLOPT_CAINFO.html) [CApath](https://curl.haxx.se/libcurl/c/CURLOPT_CAPATH.html) [URL](https://curl.haxx.se/libcurl/c/CURLOPT_URL.html) [accepttimeout-ms](https://curl.haxx.se/libcurl/c/CURLOPT_ACCEPTTIMEOUT_MS.html) [accept-encoding](https://curl.haxx.se/libcurl/c/CURLOPT_ACCEPT_ENCODING.html) [address-scope](https://curl.haxx.se/libcurl/c/CURLOPT_ADDRESS_SCOPE.html) [append](https://curl.haxx.se/libcurl/c/CURLOPT_APPEND.html) [autoreferer](https://curl.haxx.se/libcurl/c/CURLOPT_AUTOREFERER.html) [buffersize](https://curl.haxx.se/libcurl/c/CURLOPT_BUFFERSIZE.html) [certinfo](https://curl.haxx.se/libcurl/c/CURLOPT_CERTINFO.html) [cookie](https://curl.haxx.se/libcurl/c/CURLOPT_COOKIE.html) [cookiefile](https://curl.haxx.se/libcurl/c/CURLOPT_COOKIEFILE.html) [cookiejar](https://curl.haxx.se/libcurl/c/CURLOPT_COOKIEJAR.html) [cookielist](https://curl.haxx.se/libcurl/c/CURLOPT_COOKIELIST.html) [customrequest](https://curl.haxx.se/libcurl/c/CURLOPT_CUSTOMREQUEST.html) [default-protocol](https://curl.haxx.se/libcurl/c/CURLOPT_DEFAULT_PROTOCOL.html) [dirlistonly](https://curl.haxx.se/libcurl/c/CURLOPT_DIRLISTONLY.html) [failonerror](https://curl.haxx.se/libcurl/c/CURLOPT_FAILONERROR.html) [followlocation](https://curl.haxx.se/libcurl/c/CURLOPT_FOLLOWLOCATION.html) [forbid-reuse](https://curl.haxx.se/libcurl/c/CURLOPT_FORBID_REUSE.html) [fresh-connect](https://curl.haxx.se/libcurl/c/CURLOPT_FRESH_CONNECT.html) [ftp-skip-pasv-ip](https://curl.haxx.se/libcurl/c/CURLOPT_FTP_SKIP_PASV_IP.html) [ftp-use-eprt](https://curl.haxx.se/libcurl/c/CURLOPT_FTP_USE_EPRT.html) [ftp-use-epsv](https://curl.haxx.se/libcurl/c/CURLOPT_FTP_USE_EPSV.html) [ftpport](https://curl.haxx.se/libcurl/c/CURLOPT_FTPPORT.html) [header](https://curl.haxx.se/libcurl/c/CURLOPT_HEADER.html) [http-version](https://curl.haxx.se/libcurl/c/CURLOPT_HTTP_VERSION.html) [httpauth](https://curl.haxx.se/libcurl/c/CURLOPT_HTTPAUTH.html) [httpget](https://curl.haxx.se/libcurl/c/CURLOPT_HTTPGET.html) [httpproxytunnel](https://curl.haxx.se/libcurl/c/CURLOPT_HTTPPROXYTUNNEL.html) [ignore-content-length)](https://curl.haxx.se/libcurl/c/CURLOPT_IGNORE_CONTENT_LENGTH.html) [infilesize](https://curl.haxx.se/libcurl/c/CURLOPT_INFILESIZE_LARGE.html) [low-speed-limit](https://curl.haxx.se/libcurl/c/CURLOPT_LOW_SPEED_LIMIT.html) [low-speed-time](https://curl.haxx.se/libcurl/c/CURLOPT_LOW_SPEED_TIME.html) [maxconnects](https://curl.haxx.se/libcurl/c/CURLOPT_MAXCONNECTS.html) [maxfilesize](https://curl.haxx.se/libcurl/c/CURLOPT_MAXFILESIZE_LARGE.html) [maxredirs](https://curl.haxx.se/libcurl/c/CURLOPT_MAXREDIRS.html) [max-send-speed](https://curl.haxx.se/libcurl/c/CURLOPT_MAX_SEND_SPEED_LARGE.html) [max-recv-speed](https://curl.haxx.se/libcurl/c/CURLOPT_MAX_RECV_SPEED_LARGE.html) [netrc](https://curl.haxx.se/libcurl/c/CURLOPT_NETRC.html) [nobody](https://curl.haxx.se/libcurl/c/CURLOPT_NOBODY.html) [noprogress](https://curl.haxx.se/libcurl/c/CURLOPT_NOPROGRESS.html) [nosignal](https://curl.haxx.se/libcurl/c/CURLOPT_NOSIGNAL.html) [password](https://curl.haxx.se/libcurl/c/CURLOPT_PASSWORD.html) [post](https://curl.haxx.se/libcurl/c/CURLOPT_POST.html) [postfields](https://curl.haxx.se/libcurl/c/CURLOPT_COPYPOSTFIELDS.html) [postfieldsize](https://curl.haxx.se/libcurl/c/CURLOPT_POSTFIELDSIZE_LARGE.html) [protocols](https://curl.haxx.se/libcurl/c/CURLOPT_PROTOCOLS.html) [proxy](https://curl.haxx.se/libcurl/c/CURLOPT_PROXY.html) [proxyauth](https://curl.haxx.se/libcurl/c/CURLOPT_PROXYAUTH.html) [proxyport](https://curl.haxx.se/libcurl/c/CURLOPT_PROXYPORT.html) [proxytype](https://curl.haxx.se/libcurl/c/CURLOPT_PROXYTYPE.html) [proxyuserpwd](https://curl.haxx.se/libcurl/c/CURLOPT_PROXYUSERPWD.html) [range](https://curl.haxx.se/libcurl/c/CURLOPT_RANGE.html) [redir-protocols](https://curl.haxx.se/libcurl/c/CURLOPT_REDIR_PROTOCOLS.html) [referer](https://curl.haxx.se/libcurl/c/CURLOPT_REFERER.html) [resume-from](https://curl.haxx.se/libcurl/c/CURLOPT_RESUME_FROM_LARGE.html) [ssl-verifyhost](https://curl.haxx.se/libcurl/c/CURLOPT_SSL_VERIFYHOST.html) [ssl-verifypeer](https://curl.haxx.se/libcurl/c/CURLOPT_SSL_VERIFYPEER.html) [timecondition](https://curl.haxx.se/libcurl/c/CURLOPT_TIMECONDITION.html) [timeout](https://curl.haxx.se/libcurl/c/CURLOPT_TIMEOUT.html) [timeout-ms](https://curl.haxx.se/libcurl/c/CURLOPT_TIMEOUT_MS.html) [timevalue](https://curl.haxx.se/libcurl/c/CURLOPT_TIMEVALUE.html) [unix-socket-path](https://curl.haxx.se/libcurl/c/CURLOPT_UNIX_SOCKET_PATH.html) [unrestricted-auth](https://curl.haxx.se/libcurl/c/CURLOPT_UNRESTRICTED_AUTH.html) [use-ssl](https://curl.haxx.se/libcurl/c/CURLOPT_USE_SSL.html) [useragent](https://curl.haxx.se/libcurl/c/CURLOPT_USERAGENT.html) [username](https://curl.haxx.se/libcurl/c/CURLOPT_USERNAME.html) [userpwd](https://curl.haxx.se/libcurl/c/CURLOPT_USERPWD.html) [verbose](https://curl.haxx.se/libcurl/c/CURLOPT_VERBOSE.html) [wildcardmatch](https://curl.haxx.se/libcurl/c/CURLOPT_WILDCARDMATCH.html) ## Header Options In addition to the normal libcurl special options that set headers ([useragent](https://curl.haxx.se/libcurl/c/CURLOPT_USERAGENT.html), [referer](https://curl.haxx.se/libcurl/c/CURLOPT_REFERER.html), [cookie](https://curl.haxx.se/libcurl/c/CURLOPT_COOKIE.html)), there are some extra options for headers: `Content-MD5`, `Content-Type`, `Content-Length`, `Host`, `Accept`, `Expect`, `Transfer-Encoding`. $curl.Host('somewhere.com'); # or $curl.setopt(Host => 'somewhere.com') $curl.Content-MD5('...'); # or $curl.setopt(Content-MD5 => '...') You can also add any other headers you like: $curl.set-header(X-My-Header => 'something', X-something => 'foo'); You can clear a standard header by setting the header to '', or send a header without content by setting the content to ';' $curl.set-header(Accept => ''); # Don't send normal Accept header $curl.set-header(Something => ';'); # Send empty header If you are reusing the handle, you can also clear the set headers: $curl.clear-header(); This only clears the 'extra' headers, not useragent/referer/cookie. ## Special Options In addition to the normal libcurl options, Perl6 LibCurl uses options for some special Perl functionality. ```debugfunction``` replaces the libcurl [CURLOPT_DEBUGFUNCTION](https://curl.haxx.se/libcurl/c/CURLOPT_DEBUGFUNCTION.html) callback, with one that looks like this: sub debug(LibCurl::Easy $easy, CURL-INFO-TYPE $type, Buf $buf) {...} $curl.setopt(debugfunction => &debug); ```xferinfo``` replaces the libcurl [CURLOPT_XFERINFOFUNCTION](https://curl.haxx.se/libcurl/c/CURLOPT_XFERINFOFUNCTION.html) (and [CURLOPT_PROGRESSFUNCTION](https://curl.haxx.se/libcurl/c/CURLOPT_PROGRESSFUNCTION.html)) with one that looks like this: sub xferinfo(LibCurl::Easy $easy, $dltotal, $dlnow, $ultotal, $ulnow) {...} $curl.setopt(xferinfofunction => &xferinfo); ```download``` specifies a filename to download into. ```upload``` specifies a filename to upload from. ```send``` specifies a Perl `Str` or a Perl `Buf` to send content from. Finally there is a ```private``` option which replaces CURLOPT_PRIVATE, and you can safely store any Perl object in it. ## Errors In most circumstances, errors from libcurl functions will result in a thrown X::LibCurl exception. You can catch these with CATCH. You can see the string error, or cast to Int to see the [libcurl error code](https://curl.haxx.se/libcurl/c/libcurl-errors.html). For HTTP transfers, you can access the response code with `getinfo('response-code')` or just `.response-code`. You can also check that the response code is in the 2xx range with `.success`. You might find the [failonerror](https://curl.haxx.se/libcurl/c/CURLOPT_FAILONERROR.html) option useful to force an error if the HTTP code is equal to or larger than 400. That will cause an exception in those cases. On an error, you may find [extra human readable error messages](https://curl.haxx.se/libcurl/c/CURLOPT_ERRORBUFFER.html) with the ```.error``` method. $curl.perform; CATCH { say "Caught!"; when X::LibCurl { say "$_.Int() : $_"; say $curl.response-code; say $curl.error; } } ## Info After a transfer, you can retrieve internal information about the curl session with the [.getinfo](https://curl.haxx.se/libcurl/c/curl_easy_getinfo.html) method. You can explicitly request a single field, or a list of fields to get a hash, or just get all the fields as a hash. As in the options, there are also convenience methods for each info field. say $curl.getinfo('effective-url'); say $curl.getinfo('response-code'); say $curl.getinfo(); # Hash with those keys say $curl.getinfo; # Hash of all info fields say $curl.effective-url; say $curl.response-code; Fields currently defined are: [appconnect_time](https://curl.haxx.se/libcurl/c/CURLINFO_APPCONNECT_TIME.html) [certinfo](https://curl.haxx.se/libcurl/c/CURLINFO_CERTINFO.html) [condition-unmet](https://curl.haxx.se/libcurl/c/CURLINFO_CONDITION_UNMET.html) [connect-time](https://curl.haxx.se/libcurl/c/CURLINFO_CONNECT_TIME.html) [content-type](https://curl.haxx.se/libcurl/c/CURLINFO_CONTENT_TYPE.html) [cookielist](https://curl.haxx.se/libcurl/c/CURLINFO_COOKIELIST.html) [effective-url](https://curl.haxx.se/libcurl/c/CURLINFO_EFFECTIVE_URL.html) [ftp-entry-path](https://curl.haxx.se/libcurl/c/CURLINFO_FTP_ENTRY_PATH.html) [header-size](https://curl.haxx.se/libcurl/c/CURLINFO_HEADER_SIZE.html) [http-connectcode](https://curl.haxx.se/libcurl/c/CURLINFO_HTTP_CONNECTCODE.html) [httpauth-avail](https://curl.haxx.se/libcurl/c/CURLINFO_HTTPAUTH_AVAIL.html) [lastsocket](https://curl.haxx.se/libcurl/c/CURLINFO_LASTSOCKET.html) [local-ip](https://curl.haxx.se/libcurl/c/CURLINFO_LOCAL_IP.html) [local-port](https://curl.haxx.se/libcurl/c/CURLINFO_LOCAL_PORT.html) [namelookup-time](https://curl.haxx.se/libcurl/c/CURLINFO_NAMELOOKUP_TIME.html) [num-connects](https://curl.haxx.se/libcurl/c/CURLINFO_NUM_CONNECTS.html) [os-errno](https://curl.haxx.se/libcurl/c/CURLINFO_OS_ERRNO.html) [pretransfer-time](https://curl.haxx.se/libcurl/c/CURLINFO_PRETRANSFER_TIME.html) [primary-ip](https://curl.haxx.se/libcurl/c/CURLINFO_PRIMARY_IP.html) [primary-port](https://curl.haxx.se/libcurl/c/CURLINFO_PRIMARY_PORT.html) [proxyauth-avail](https://curl.haxx.se/libcurl/c/CURLINFO_PROXYAUTH_AVAIL.html) [redirect-url](https://curl.haxx.se/libcurl/c/CURLINFO_REDIRECT_URL.html) [request-size](https://curl.haxx.se/libcurl/c/CURLINFO_REQUEST_SIZE.html) [response-code](https://curl.haxx.se/libcurl/c/CURLINFO_RESPONSE_CODE.html) [rtsp-client-cseq](https://curl.haxx.se/libcurl/c/CURLINFO_RTSP_CLIENT_CSEQ.html) [rtsp-cseq-recv](https://curl.haxx.se/libcurl/c/CURLINFO_RTSP_CSEQ_RECV.html) [rtsp-server-cseq](https://curl.haxx.se/libcurl/c/CURLINFO_RTSP_SERVER_CSEQ.html) [rtsp-session-id](https://curl.haxx.se/libcurl/c/CURLINFO_RTSP_SESSION_ID.html) [size-download](https://curl.haxx.se/libcurl/c/CURLINFO_SIZE_DOWNLOAD.html) [size-upload](https://curl.haxx.se/libcurl/c/CURLINFO_SIZE_UPLOAD.html) [speed-download](https://curl.haxx.se/libcurl/c/CURLINFO_SPEED_DOWNLOAD.html) [speed-upload](https://curl.haxx.se/libcurl/c/CURLINFO_SPEED_UPLOAD.html) [ssl-engines](https://curl.haxx.se/libcurl/c/CURLINFO_SSL_ENGINES.html) [total-time](https://curl.haxx.se/libcurl/c/CURLINFO_TOTAL_TIME.html) ## Received header fields You can retrieve the header fields in several ways as well. say $curl.receiveheaders; # Hash of all headers say $curl.get-header('Content-Length'); say $curl.Content-Length; ## Content If you did not specify the ```download``` option to download content into a file, the content will be stashed in memory in a Buf object you can access with the `.buf()` method. If you understand that the content is decodable as a string, you can call the ```.content($encoding = 'utf-8')``` method which will decode the content into a `Str`, by default with the **utf-8** encoding if not specified. say "Got content", $curl.content; ## Multi-part forms There is a special POST option for multipart/formdata. my $curl = LibCurl::Easy.new(URL => 'http://...'); # normal field $curl.formadd(name => 'fieldname', contents => 'something'); # upload a file from disk, give optional filename or contenttype $curl.formadd(name => 'fieldname', file => 'afile.txt', filename => 'alternate.name.txt', contenttype => 'image/jpeg'); # Send a Blob of contents, but as a file with a filename $curl.formadd(name => 'fieldname', buffer => 'some.file.name.txt', bufferptr => "something".encode); $curl.perform; This will automatically cause LibCurl to POST the data. The options are described in more detail [here](https://curl.haxx.se/libcurl/c/curl_formadd.html). The fields implemented are: [name](https://curl.haxx.se/libcurl/c/curl_formadd.html#CURLFORMCOPYNAME) [contents](https://curl.haxx.se/libcurl/c/curl_formadd.html#CURLFORMCOPYCONTENTS) [filecontent](https://curl.haxx.se/libcurl/c/curl_formadd.html#CURLFORMFILECONTENT) [file](https://curl.haxx.se/libcurl/c/curl_formadd.html#CURLFORMFILE) [contenttype](https://curl.haxx.se/libcurl/c/curl_formadd.html#CURLFORMCONTENTTYPE) [filename](https://curl.haxx.se/libcurl/c/curl_formadd.html#CURLFORMFILENAME) [buffer](https://curl.haxx.se/libcurl/c/curl_formadd.html#CURLFORMBUFFER) [bufferptr](https://curl.haxx.se/libcurl/c/curl_formadd.html#CURLFORMBUFFERPTR) ## Proxies [libcurl](https://curl.haxx.se/libcurl) has great proxy support, and you should be able to specify anything needed as options to LibCurl to use them. The easiest for most common cases is to just set the [proxy](https://curl.haxx.se/libcurl/c/CURLOPT_PROXY.html) option. By default, libcurl will also respect the environment variables **http_proxy**, **ftp_proxy**, **all_proxy**, etc. if any of those are set. Setting the `proxy` string to `""` (an empty string) will explicitly disable the use of a proxy, even if there is an environment variable set for it. A proxy host string can also include protocol scheme (`http://`) and embedded user + password. ## Unix sockets `LibCurl` can be used to communicate with a unix socket by setting the `unix-socket-path` option. You must still specify a host, but it is ignored. For example, you could use the [docker REST API](https://docs.docker.com/engine/api/latest) like this: use LibCurl::Easy; use JSON::Fast; my $docker = LibCurl::Easy.new(unix-socket-path => '/var/run/docker.sock'); my $info = from-json($docker.URL("http://localhost/info").perform.content); say $info; say $info; ## Multi Perl6 LibCurl also supports the libcurl [multi](https://curl.haxx.se/libcurl/c/libcurl-multi.html) interface. You still have to construct `LibCurl::Easy` (or `LibCurl::HTTP`) handles for each transfer, but instead of calling `.perform`, just add the handle to a `LibCurl::Multi`. use LibCurl::Easy; use LibCurl::Multi; my $curl1 = LibCurl::Easy.new(:verbose, :followlocation, URL => 'http://example.com', download => './myfile1.html'); my $curl2 = LibCurl::Easy.new(:verbose, :followlocation, URL => 'http://example.com', download => './myfile2.html'); my $multi = LibCurl:Multi.new; $multi.add-handle($curl1); $multi.add-handle($curl2); $multi.perform; say $curl1.statusline; say $curl2.statusline; You can also use an asynchronous callback to get a notification when an individual transfer has completed. The callback takes place in the same thread with all the transfers, so it should complete quickly (or start a new thread for heavy lifting as needed). You can add additional handles to the `LibCurl::Multi` at any time, even re-using completed LibCurl::Easy handles (after setting `URL`, etc. as needed). use LibCurl::Easy; use LibCurl::Multi; my $curl1 = LibCurl::Easy.new(:followlocation, URL => 'http://example.com', download => 'myfile1.html'); my $curl2 = LibCurl::Easy.new(:followlocation, URL => 'http://example.com', download => 'myfile2.html'); sub callback(LibCurl::Easy $easy, Exception $e) { die $e if $e; say $easy.response-code; say $easy.statusline; } my $multi = LibCurl::Multi.new(callback => &callback); $multi.add-handle($curl1, $curl2); $multi.perform; ## INSTALL `LibCurl` depends on [libcurl](https://curl.haxx.se/download.html), so you must install that prior to installing this module. ## SEE ALSO There is another Perl 6 interface to libcurl [Net::Curl](https://github.com/azawawi/perl6-net-curl) developed by Ahmad M. Zawawi. If you already use it and it works well for you, great, keep using it. Ahmad did a nice job developing it. I would encourage you to also take a look at this module. LibCurl provides a more 'perlish' OO interface to libcurl than Net::Curl, and wraps things in a manner to make using it a little easier (IMHO). ## LICENSE Copyright © 2017 United States Government as represented by the Administrator of the National Aeronautics and Space Administration. No copyright is claimed in the United States under Title 17, U.S.Code. All Other Rights Reserved. See [NASA Open Source Agreement](../master/NASA_Open_Source_Agreement_1.3%20GSC-17847.pdf) for more details.