Are there languages/software that implements http status code 418?

Question

I know that status code 418 was defined as a April Fools' joke, and "is not expected to be implemented by actual HTTP servers" as is stated on Wikipedia.

But I would be interested if any of you knew of a language/webserver/IDE that supports it.

I was trying on Apache (via php), and obviously it got me an internal error (500). I just like the humor behind it (am not trying to troll here) and would like to know if more than just Emacs implements this.

More precisely: It could be emulated in php for example by doing something like ...

header("HTTP/1.1 418 Whatever text I'd like");

... but do any of you know any actual server software, or language in particular, that implements it natively, where something like the following would not throw a 500, but actually work:

http_response_code(418);

Mine does. It returns 418 if you try to access a feature you haven't unlocked yet, and encourages you to [have some tea and relax](http://q.pokefarm.org/418.php). — Niet the Dark Absol, Jun 03 '14 at 14:45
If you call the page directly, then sure. Just like if you go to any site's `404` page directly, you'll get a `200 OK` of the error document. But if you try to access a feature that you haven't unlocked on my site, it will respond with [a "proper" 418 error code](http://i.imgur.com/mHWrQds.png). — Niet the Dark Absol, Jun 03 '14 at 14:54
@Niet: Nice :-) But it is not actually the server supporting this correct? Meaning: You do put it in the header of the response, and not just set it to a 418, which the server knows by itself, is that right? I mean, it works too, but yeah ^^ (still nice way, to use this) — Levite, Jun 03 '14 at 15:03
Right, it is a manual setting to 418. This is because servers aren't teapots, and therefore cannot correctly implement 418 natively. Now, if one were to have a teapot that could be controlled by HTTP, then you could reasonably implement 418 as an appropriate response to `GET /coffee HTCPCP/1.0` or something :p — Niet the Dark Absol, Jun 03 '14 at 15:06
Well the problem is, that it would have to be @OlegS. 's comment that got the answer to this question. Seems like `node.js` does support 418 natively and his `res.send(418)` sends a proper `I am a teapot` message to go with it! (Which was what I was really looking for) Your answers are great examples none the less, but having server *software* (apache, nginx, etc.) support this natively is just awesome / what I wanted. Sry for being ambiguous in my question (not a native speaker). But thx for reminding, I will write an answer with that. If Oleg also answers, I will delete mine and accept his! — Levite, Feb 25 '15 at 07:51

score 37 · Answer 1 · answered Nov 20 '14 at 05:19

37

Google does it.

Try clicking on the teapot, or tilting your mobile device.

www.google.com/teapot

answered Nov 20 '14 at 05:19

Buttle Butkus

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7

Surely google.com/brewcoffee would be more appropriate for them to use?! – Mark Ireland Dec 16 '15 at 15:57
`curl -H "Accept-Additions: Chocolate" -X BREW coffee://google.com/breville` – activedecay Oct 12 '18 at 18:42

Levite · Accepted Answer · 2020-03-17T00:36:59.877

Websites that have implemented it

Google - www.google.com/teapot - (Details from @ButtleButkus)
Stackoverflow on CSRF violations - Meta question about it - (Details from @ImmortalBlue)
A teapot - joereddington.com/projects/418.. - (Details from @MegaTom)
Snarked - www.snarked.org/coffee - (Details from @MR.X)

Languages that support it natively

Node.js

res.send(418)

Sends following HTTP header:

HTTP/1.1 418 I'm a teapot
Date: Wed, 25 Feb 2015 07:08:27 GMT
Connection: keep-alive
Transfer-Encoding: chunked

The actual node.js code used to get this response was:

require('http').createServer(function(q,s) {
    s.writeHead(418);
    s.end();
}).listen(80);

Golang

http.Error(w, http.StatusText(418), 418)

Python

Within native libraries, starting from Python 3.9 (Details @Ross)

score 4 · Answer 3 · edited Oct 07 '21 at 05:57

4

Yes, it is implemented (by a teapot).

This error code is an impotent part of HTCPCP(Hyper Text Coffee Pot Control Protocol).

edited Oct 07 '21 at 05:57

Community

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answered Nov 21 '14 at 18:55

MegaTom

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score 4 · Answer 4 · answered Mar 16 '20 at 18:41

4

Python 3.9 will support HTTP 418 from its next (fifth) alpha release. I opened a pull request for this to be supported which was merged last weekend.

answered Mar 16 '20 at 18:41

Ross

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score 2 · Answer 5 · edited Mar 20 '17 at 10:29

2

Stack overflow implements it:

https://meta.stackexchange.com/questions/185426/stack-overflow-returning-http-error-code-418-im-a-teapot

albeit, a little creative, when dealing with CSRF violations.

edited Mar 20 '17 at 10:29

Community

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answered Mar 30 '15 at 09:20

Immortal Blue

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score 2 · Answer 6 · answered Dec 13 '15 at 04:00

2

Go lang's net/http package codifies HTTP 418 Status as a constant: StatusTeapot.

answered Dec 13 '15 at 04:00

Mike Atlas

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Awesome! Thanks ... added to the list. – Levite Dec 14 '15 at 10:51

score 1 · Answer 7 · answered Mar 22 '15 at 23:33

My server, www.snarked.org, does it if the pathname begins "/coffee" or "/pot-" followed by a digit, or methods BREW or WHEN, or a scheme equating to "coffee:" (actually, the regex pattern "^[CK][AO]FF?[EIO]E?$" which covers most western-European languages). After 60 seconds, it rolls over to Google's top hit for teapots.