Move `delete` to be method with body.

[phillip-haydon]

http://tools.ietf.org/html/rfc7231

This states:

A payload within a DELETE request message has no defined semantics;
sending a payload body on a DELETE request might cause some existing
implementations to reject the request.

So shouldn't delete be removed from:

createShortMethods('get', 'delete', 'head', 'jsonp');

And added to:

createShortMethodsWithData('post', 'put', 'patch');

(discussion doesn't include how a server may or may not handle this type of request)

This is in regards to:

http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol

In June 2014, the WG released an updated six-part specification obsoleting RFC 2616

[pkozlowski-opensource]

Well, if specs don't define precisely semantics here I guess we shouldn't be preventing people from sending DELETE requests with body. I recall several other issues being opened for this.

[awerlang]

Actually the same is stated about GET.

http://tools.ietf.org/html/rfc7231#section-4.3.1

Sometimes, when I want to perform a query and need to send a bunch of data, I end up writing a POST method for the ability to send a payload.

[rcollette]

While future behavior is being discussed, at least the documentation should reflect the current behavior. I lost a bunch of time and eventually had to debug into angular code to figure out what was going on. Not a straight forward task with digest/callbacks.

[pkozlowski-opensource]

@rcollette The delete method is currently documented as delete(url, [config]); - that is - as one without any data argument. But if you thin that more explicit mention is needed, we would love to see a PR!

[caitp]

I don't see anything in fetch or xhr that would forbid or ignore the request body for delete --- I think this was more about best practices and maybe browser compat. If it works correctly on all supported browsers, then we can talk about whether it makes sense as a best practice

[pkozlowski-opensource]

@caitp last time I looked at various specs (mostly HTTP) it wasn't clear if it is at allowed on HTTP level to have DELETE with body. It seems like some servers ignore body even if sent, some other process it.

But I agree that we should try to see if things are not exploding on XHR-level in all browsers and if not, we could move this method to the set of ones with allowed body. Unless someone finds a spec that forbids this.

[caitp]

yes, and it's arguably not a best-practice to include a body in DELETE requests because some backends discard them --- but I don't believe there's anything in the RFCs or the WHATWG specs for the clientside that enforce any of this