curl/docs/HISTORY.md

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How curl Became Like This
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=========================
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Towards the end of 1996, Daniel Stenberg was spending time writing an IRC bot
for an Amiga related channel on EFnet. He then came up with the idea to make
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currency-exchange calculations available to Internet Relay Chat (IRC)
users. All the necessary data were published on the Web; he just needed to
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automate their retrieval.
1996
----
On November 11, 1996 the Brazilian developer Rafael Sagula wrote and released
HttpGet version 0.1.
Daniel extended this existing command-line open-source tool. After a few minor
adjustments, it did just what he needed. The first release with Daniel's
additions was 0.2, released on December 17, 1996. Daniel quickly became the
new maintainer of the project.
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1997
----
HttpGet 0.3 was released in January 1997 and now it accepted HTTP URLs on the
command line.
HttpGet 1.0 was released on April 8 1997 with brand new HTTP proxy support.
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We soon found and fixed support for getting currencies over GOPHER. Once FTP
download support was added, the name of the project was changed and urlget 2.0
was released in August 1997. The http-only days were already passed.
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Version 2.2 was released on August 14 1997 and introduced support to build for
and run on Windows and Solaris.
November 24 1997: Version 3.1 added FTP upload support.
Version 3.5 added support for HTTP POST.
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1998
----
February 4: urlget 3.10
February 9: urlget 3.11
March 14: urlget 3.12 added proxy authentication.
The project slowly grew bigger. With upload capabilities, the name was once
again misleading and a second name change was made. On March 20, 1998 curl 4
was released. (The version numbering from the previous names was kept.)
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(Unrelated to this project a company called Curl Corporation registered a US
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trademark on the name "CURL" on May 18 1998. That company had then already
registered the curl.com domain back in November of the previous year. All this
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was revealed to us much later.)
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SSL support was added, powered by the SSLeay library.
August: first announcement of curl on freshmeat.net.
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October: with the curl 4.9 release and the introduction of cookie support,
curl was no longer released under the GPL license. Now we are at 4000 lines of
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code, we switched over to the MPL license to restrict the effects of
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"copyleft".
November: configure script and reported successful compiles on several
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major operating systems. The never-quite-understood -F option was added and
curl could now simulate quite a lot of a browser. TELNET support was added.
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Curl 5 was released in December 1998 and introduced the first ever curl man
page. People started making Linux RPM packages out of it.
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1999
----
January: DICT support added.
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OpenSSL took over and SSLeay was abandoned.
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May: first Debian package.
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August: LDAP:// and FILE:// support added. The curl website gets 1300 visits
weekly. Moved site to curl.haxx.nu.
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September: Released curl 6.0. 15000 lines of code.
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December 28: added the project on Sourceforge and started using its services
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for managing the project.
2000
----
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Spring: major internal overhaul to provide a suitable library interface.
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The first non-beta release was named 7.1 and arrived in August. This offered
the easy interface and turned out to be the beginning of actually getting
other software and programs to be based on and powered by libcurl. Almost
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20000 lines of code.
June: the curl site moves to "curl.haxx.se"
August, the curl website gets 4000 visits weekly.
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The PHP guys adopted libcurl already the same month, when the first ever third
party libcurl binding showed up. CURL has been a supported module in PHP since
the release of PHP 4.0.2. This would soon get followers. More than 16
different bindings exist at the time of this writing.
September: kerberos4 support was added.
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November: started the work on a test suite for curl. It was later re-written
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from scratch again. The libcurl major SONAME number was set to 1.
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2001
----
January: Daniel released curl 7.5.2 under a new license again: MIT (or
MPL). The MIT license is extremely liberal and can be combined with GPL
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in other projects. This would finally put an end to the "complaints" from
people involved in GPLed projects that previously were prohibited from using
libcurl while it was released under MPL only. (Due to the fact that MPL is
deemed "GPL incompatible".)
March 22: curl supports HTTP 1.1 starting with the release of 7.7. This
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also introduced libcurl's ability to do persistent connections. 24000 lines of
code. The libcurl major SONAME number was bumped to 2 due to this overhaul.
The first experimental ftps:// support was added.
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August: The curl website gets 8000 visits weekly. Curl Corporation contacted
Daniel to discuss "the name issue". After Daniel's reply, they have never
since got back in touch again.
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September: libcurl 7.9 introduces cookie jar and `curl_formadd()`. During the
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forthcoming 7.9.x releases, we introduced the multi interface slowly and
without many whistles.
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September 25: curl (7.7.2) is bundled in Mac OS X (10.1) for the first time. It was
already becoming more and more of a standard utility of Linux distributions
and a regular in the BSD ports collections.
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2002
----
June: the curl website gets 13000 visits weekly. curl and libcurl is
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35000 lines of code. Reported successful compiles on more than 40 combinations
of CPUs and operating systems.
To estimate the number of users of the curl tool or libcurl library is next to
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impossible. Around 5000 downloaded packages each week from the main site gives
a hint, but the packages are mirrored extensively, bundled with numerous OS
distributions and otherwise retrieved as part of other software.
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October 1: with the release of curl 7.10 it is released under the MIT license
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only.
Starting with 7.10, curl verifies SSL server certificates by default.
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2003
----
January: Started working on the distributed curl tests. The autobuilds.
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February: the curl site averages at 20000 visits weekly. At any given moment,
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there's an average of 3 people browsing the website.
Multiple new authentication schemes are supported: Digest (May), NTLM (June)
and Negotiate (June).
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November: curl 7.10.8 is released. 45000 lines of code. ~55000 unique visitors
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to the website. Five official web mirrors.
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December: full-fledged SSL for FTP is supported.
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2004
----
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January: curl 7.11.0 introduced large file support.
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June: curl 7.12.0 introduced IDN support. 10 official web mirrors.
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This release bumped the major SONAME to 3 due to the removal of the
`curl_formparse()` function
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August: Curl and libcurl 7.12.1
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Public curl release number: 82
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Releases counted from the beginning: 109
Available command line options: 96
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Available curl_easy_setopt() options: 120
Number of public functions in libcurl: 36
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Amount of public website mirrors: 12
Number of known libcurl bindings: 26
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2005
----
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April: GnuTLS can now optionally be used for the secure layer when curl is
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built.
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April: Added the multi_socket() API
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September: TFTP support was added.
More than 100,000 unique visitors of the curl website. 25 mirrors.
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December: security vulnerability: libcurl URL Buffer Overflow
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2006
----
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January: We dropped support for Gopher. We found bugs in the implementation
that turned out to have been introduced years ago, so with the conclusion that
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nobody had found out in all this time we removed it instead of fixing it.
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March: security vulnerability: libcurl TFTP Packet Buffer Overflow
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September: The major SONAME number for libcurl was bumped to 4 due to the
removal of ftp third party transfer support.
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November: Added SCP and SFTP support
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2007
----
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February: Added support for the Mozilla NSS library to do the SSL/TLS stuff
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July: security vulnerability: libcurl GnuTLS insufficient cert verification
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2008
----
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November:
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Command line options: 128
curl_easy_setopt() options: 158
Public functions in libcurl: 58
Known libcurl bindings: 37
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Contributors: 683
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145,000 unique visitors. >100 GB downloaded.
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2009
----
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March: security vulnerability: libcurl Arbitrary File Access
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April: added CMake support
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August: security vulnerability: libcurl embedded zero in cert name
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December: Added support for IMAP, POP3 and SMTP
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2010
----
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January: Added support for RTSP
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February: security vulnerability: libcurl data callback excessive length
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March: The project switched over to use git (hosted by GitHub) instead of CVS
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for source code control
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May: Added support for RTMP
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Added support for PolarSSL to do the SSL/TLS stuff
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August:
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Public curl releases: 117
Command line options: 138
curl_easy_setopt() options: 180
Public functions in libcurl: 58
Known libcurl bindings: 39
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Contributors: 808
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Gopher support added (re-added actually, see January 2006)
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2011
----
February: added support for the axTLS backend
April: added the cyassl backend (later renamed to WolfSSL)
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2012
----
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July: Added support for Schannel (native Windows TLS backend) and Darwin SSL
(Native Mac OS X and iOS TLS backend).
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Supports Metalink
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October: SSH-agent support.
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2013
----
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February: Cleaned up internals to always uses the "multi" non-blocking
approach internally and only expose the blocking API with a wrapper.
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September: First small steps on supporting HTTP/2 with nghttp2.
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October: Removed krb4 support.
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December: Happy eyeballs.
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2014
----
March: first real release supporting HTTP/2
September: Website had 245,000 unique visitors and served 236GB data
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SMB and SMBS support
2015
----
June: support for multiplexing with HTTP/2
August: support for HTTP/2 server push
December: Public Suffix List
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2016
----
January: the curl tool defaults to HTTP/2 for HTTPS URLs
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December: curl 7.52.0 introduced support for HTTPS-proxy!
First TLS 1.3 support
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2017
----
July: OSS-Fuzz started fuzzing libcurl
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September: Added Multi-SSL support
The website serves 3100 GB/month
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Public curl releases: 169
Command line options: 211
curl_easy_setopt() options: 249
Public functions in libcurl: 74
Contributors: 1609
October: SSLKEYLOGFILE support, new MIME API
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October: Daniel received the Polhem Prize for his work on curl
November: brotli
2018
----
January: new SSH backend powered by libssh
March: starting with the 1803 release of Windows 10, curl is shipped bundled
with Microsoft's operating system.
July: curl shows headers using bold type face
October: added DNS-over-HTTPS (DoH) and the URL API
MesaLink is a new supported TLS backend
libcurl now does HTTP/2 (and multiplexing) by default on HTTPS URLs
curl and libcurl are installed in an estimated 5 *billion* instances
world-wide.
October 31: Curl and libcurl 7.62.0
Public curl releases: 177
Command line options: 219
curl_easy_setopt() options: 261
Public functions in libcurl: 80
Contributors: 1808
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December: removed axTLS support
2019
----
March: added experimental alt-svc support
August: the first HTTP/3 requests with curl.
September: 7.66.0 is released and the tool offers parallel downloads
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2020
----
curl and libcurl are installed in an estimated 10 *billion* instances
world-wide.
January: added BearSSL support
March: removed support for PolarSSL, added wolfSSH support
April: experimental MQTT support
August: zstd support
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November: the website moves to curl.se. The website serves 10TB data monthly.
December: alt-svc support
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2021
----
February 3: curl 7.75.0 ships with support for Hyper as an HTTP backend
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March 31: curl 7.76.0 ships with support for rustls
July: HSTS is supported
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2022
----
March: added --json, removed mesalink support
Public curl releases: 206
Command line options: 245
curl_easy_setopt() options: 295
Public functions in libcurl: 86
Contributors: 2601
The curl.se website serves 16,500 GB/month over 462M requests, the
official docker image has been pulled 4,098,015,431 times.