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Let me tell you about curl
This document provides an overview of curl, an open source command line tool and library for transferring data with Internet protocols. It discusses curl's history starting in 1998, its widespread usage across operating systems, CPU architectures, and planets. It also outlines curl's many supported features and protocols, large number of contributors and commits, extensive testing, and commitment to security and open development. The future of curl is discussed in the context of the growing Internet of Things and connectivity of everyday devices and appliances.
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Let me tell you about curl
- 1. Let me tellyou about... March 24, 2022
- 2.
- 3.
- 4.
- 5. An open sourceproject that makes a command line tool and a library for transferring data using Internet protocols @bagder curl.se
- 6. Once upon thetime... @bagder
- 7.
- 8. @bagder … while Iwas writing this IRC bot...
- 9. Let’s put itonline... as open source @bagder
- 10. … became curl1998 HTTP Gopher FTP @bagder
- 11. … and timepassed... @bagder
- 12. … and timepassed... @bagder
- 13. … and timepassed... @bagder
- 14. … and timepassed... @bagder
- 15. Features! DICT, FILE, FTP,FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET and TFTP TLS certificates, HTTP POST, HTTP PUT, FTP uploading, HTTP form based upload, HTTP/HTTPS/SOCKS proxy, cookies, authentication (Basic, Digest, NTLM, Negotiate, Kerberos), HTTP/2, HTTP/3, alt-svc:, happy eyeballs, file transfer resume, proxy tunneling, DNS-over-HTTPS, HTTP compression and much more @bagder
- 16.
- 17. Web sites onthe Internet 1996: 250,000 2022: 2,000,000,000 (multiplied 8,000 times) @bagder
- 18. @bagder curl runs inall your devices
- 19.
- 20.
- 21. bindings: 60 application Falcon D C++ Requests ScriptBasi c Ferite Delphi Chcurl curlpp Gambas Eiffel BBHTTP (Cocoa) curlcppglib/GTK+ Euphoria Curlhandl e (Cocoa) go-curl Object- Pascal Lua-cURL Java Guile O’Caml Mono Julia Harbour Pascal .NET Common Lisp Haskell WWW::Curl (perl) node.js luacurl perl6-net- curl PHP/CURL Rexx PostgreSQ L Ring pycURL RPG Tclcurl Q Visual Foxpro Visual Basic vXWidgets S-Lang Xojo XBLite Smalltalk SP- Forth Scilab Scheme curl- rust SPL Ada95 Curb (Ruby) Clojure R Kapito (Erlang) PureBasic Net::Curl (perl) Nim @bagder
- 22. third party deps:35 I/O layer URL parser libidn2 winidn HTTP TLS OpenSSL Mesalink gskit mbedTLS wolfSSL Schannel Secure Transport GnuTLS NSS boringssl libressl AmiSSL SFTP SCP LDAP WinLDAP OpenLDAP RTMP librtmp Name resolver c-ares compression libz brotl i cookies libpsl IMAP SMTP POP3 HTTP/2 nghttp2 authentication winsspi Heimdal MIT kerberos HTTP/3 quiche ngtcp2 HTTP/1 SSH wolfSSH libssh2 libssh @bagder BearSSL nghttp3 zstd FTP Hyper FTPS IMAPS POP3S SMBS SMTPS GOPHERS HTTPS LDAPS RTMPS libgsasl rustls
- 23. operating systems: 86 @bagder SyllableOS TPF Tizen Symbian Tru64 SunOS tvOS ucLinux Genode Hurd iOS Integrity Illumos HP-UX HardenedBS D Haiku z/OS Nintendo Switch NonStop OS NetWare MorphOS MPE/iX MS-DOS NCR MP-RAS NetBSD RISC OS Redox ReactOS Sailfish OS SCO Unix Serenity SINIX-Z Qubes OS UnixWare WebOS vxWorks VMS Windows UNICOS Windows CE Wii System Software AmigaOS Blackberry 10 BeOS Android Blackberry Tablet OS AIX Cell OS Aros IRIX LineageOS Mbed Micrium macOS Mac OS 9 Linux Lua RTOS eCOS FreeRTOS FreeBSD FreeDOS Fuchsia DragonFly BSD Cygwin Cisco IOS OpenBSD OS/2 OS/400 Ultrix ipadOS NuttX Solaris Xbox System ChromeOS MINIX Garmin OS QNX PlayStation Portable Plan 9 OS21 OpenStep Orbis OS z/TPF z/VM z/VSE Operating systems known to have run curl Atari FreeMiNT
- 24. CPU architectures: 22 @bagder x86 MIPS ARM PowerPC SPARCPOWER m68k s390 HP-PA SH4 Nios RISC-V OpenRISC ARC Cell Itanium VAX MicroBlaze Alpha Xtensa x86-64 AVR32 CPU architectures known to have run curl
- 25. Planets: 2 @bagder Earth Mars Planetsknown to have run curl
- 26.
- 27. Hi Daniel, I’m themarketing director for Dice.com and I wanted to reach out to you to thank you for spotting our billboard error on the 101. We are deeply embarrassed by this mistake to say the least. In a classic coding scenario, our QA failed us. Unfortunately for us, we bought this spot long-term and we are trying to figure out how quickly we can replace the content. @bagder
- 28. Subject: Multimedya isc-v:85 Ihave toyota corola with multimedya system that you have its copyright. I need a advice to know how to use the gps. Master of many things @bagder
- 29. Cisco Small BusinessRouters, March 2019 @bagder
- 30.
- 31. Why use libcurl? Stablewell-documented API – examples from 2000 still work Same API everywhere – 86 OSs, 22 CPU archs... Open source – free and immortal Rock solid – battle proven, furiously maintained, secure Customizable – use what you want, disable what you don’t Internet hardened – speaks protocols the way they should Multiple protocols – 50% of users use more than two! Keeps up – TLS 1.3, HTTP/2, HTTP/3, ... @bagder
- 32. Why Open Source? Therewas never any alternative to me Wanted to contribute back Would never even come close unless No, I would not be rich otherwise @bagder
- 33.
- 34. 0821 0822 08500854 0959 0974 1035 1081 1123 1225 1350 1425 1427 1436 1460 1510 1635 1639 1651 1653 1725 1730 1734 1738 1777 1808 1867 1869 1870 1884 1928 1939 1945 1950 1951 1952 1959 1964 2045 2046 2047 2048 2049 2060 2061 2068 2095 2104 2109 2133 2145 2183 2184 2192 2195 2222 2228 2229 2231 2246 2255 2326 2373 2384 2388 2389 2396 2428 2449 2459 2478 2487 2518 2553 2554 2577 2595 2616 2617 2640 2718 2732 2817 2818 2821 2831 2854 2936 2964 2965 3207 3280 3490 3493 3501 3513 3617 3659 3961 3986 4120 4121 4178 4217 4248 4346 4366 4422 4511 4516 4559 4616 4954 4959 5034 5092 5321 5322 5335 5336 5849 5890 6531 6532 6749 7230 7231 7232 7233 7234 7235 7238 7540 7541 7628 7838 8314 8446 8484 8999 9000 9001 9002 143 Relevant RFCs (280,000 lines) libcurl @bagder
- 35.
- 36. Contributors 2,600 in total 50-70per release Increasing Small core team Volunteers @bagder
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- 39.
- 40. a selected few havepush rights @bagder https: github.com/curl
- 41.
- 42. Official curl sponsorsMarch 2022 @bagder
- 43. Secure enough forthe billions? Reviews (at 111 CVEs and counting) Code audit Code style Fuzzing Docs Static code analyzers Valgrind and sanitizers Many tests @bagder CI like crazy
- 44. curl CI 2022 >100build + test “rounds” per commit Tests code style, indenting etc Thousands of tests per build Builds and tests on tens of platforms 25 hours of CI per commit @bagder
- 45. Code and testpolicies Fix all warnings (oh well...) No defects left Use the most picky compiler options As many tests as possible Fix security issues asap @bagder
- 46.
- 47. Let's make itpersonal This is the lead developer of this project @bagder
- 48. … and timepassed... @bagder
- 49. Security issues Release management Website admin Mailing list admin Patch reviewing User support Blogging about it What’s maintaining? Debugging Patch merging Feature development Write documentation Event planning Getting stickers Doing talks @bagder
- 50.
- 51. I still leadthe development Two hours spare time per day Every day, every week, every year, since 1998 Part time paid since 2014 Full time since early 2019 Yes, I totally mix and blur spare time and work! @bagder @bagder
- 52. “The created economicvalue cannot be overstated.” @bagder @bagder
- 53. Where does theroad lead from here? @bagder
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- 55. Everything will benetworked If it isn’t powered now, it will be soon If it is powered, it will be networked If it is networked, it needs Internet access If it needs Internet access, curl can help @bagder @bagder
- 56. sewing machine, microwave,advertisement sign, kitchen scale, electric razor, kitchen oven, fan, dog collar, bicycle computer, power plug, piano, child monitor, radiator, vacuum cleaner, escooter, lawn mower, air conditioner, printer, projector, kettle, bluray player, settop box, computer monitor, alarm clock, clothes iron, powertool, exercise equipment, mouse, wifi router, car, headphones, electric toothbrush, bluetooth speaker, air purifier, doorbell, watch, game console, keychain fob, flashlight, ebook-tablet, washing machine, stereo equipment, ebikes, tv, toaster, thermostat, door lock, drilling machine, fridge and freezer, lamp switch, clothing, bathroom scale, camera, smart phone, garage door opener, medical device, bus-stop sign, stove, blender, light bulb, tablet Everything will be networked @bagder @bagder
- 57. All network technologies Bluetooth5, Wifi 6, 5G/6G, TbE etc drive more networking More networking means more curl @bagder @bagder
- 58. All platforms curl runson 80 operating systems, 20 CPU architectures and 2 planets … and your next platform @bagder @bagder
- 59. HTTP APIs everywhere everyoneoffers HTTP APIs curl is the universal API consumer and debugger @bagder @bagder
- 60. A defacto standardAPI stable and solid API since twenty years secure and fast transfers all the protocols you need @bagder @bagder
- 61. Unparalleled Commercial support Rock solid StableAPI Open Source @bagder @bagder
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- 63. Future No, it trulynever gets done Protocols keep evolving Open source code survives No slow-down in sight You can help! @bagder
- 64.
- 65. Done over thelast 4 years GOPHERS HTTP/3 MQTT zstd --alt-svc --hsts --aws-sigv4 --remove-on-error --retry-all-errors --tls13-ciphers --proxy-tls13-ciphers --disallow-username-in-url w: %header{} %{errormsg} %{exitcode} %{header_json} %{json} %{method} %{num_headers} %{onerror} %{urlnum} %{url} --json --no-clobber --parallel --doh-url --etag-compare --fail-with-body --haproxy-protocol @bagder
- 66. Done over thelast 4 years --alt-svc --hsts --aws-sigv4 --remove-on-error --retry-all-errors --tls13-ciphers --proxy-tls13-ciphers --disallow-username-in-url w: %header{} %{errormsg} %{exitcode} %{header_json} %{json} %{method} %{num_headers} %{onerror} %{urlnum} %{url} --json --no-clobber --parallel --doh-url --etag-compare --fail-with-body --haproxy-protocol @bagder JSON!
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- 69.
- 70. License This presentation andits contents are licensed under the Creative Commons Attribution 4.0 license: http://creativecommons.org/licenses/by/4.0/ @bagder