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Supporting browser-based PUT & DELETE
=====================================
> "There are two noncontroversial uses for overloaded POST. The first is to *simulate* HTTP's uniform interface for clients like web browsers that don't support PUT or DELETE" - [RESTful Web Services](1), Leonard Richardson & Sam Ruby.
This is the same strategy as is used in [Ruby on Rails](2).
Overloading the HTTP method
---------------------------
For example, given the following form:
<form action="/news-items/5" method="POST">
<input type="hidden" name="_method" value="DELETE">
</form>
`request.method` would return `"DELETE"`.
Overloading the HTTP content type
---------------------------------
Browser-based submission of content types other than form are supported by using form fields named `_content` and `_content_type`:
For example, given the following form:
<form action="/news-items/5" method="PUT">
<input type="hidden" name="_content_type" value="application/json">
<input name="_content" value="{'count': 1}">
</form>
`request.content_type` would return `"application/json"`, and `request.content` would return `"{'count': 1}"`
Why not just use Javascript?
============================
**[TODO]**
Doesn't HTML5 support PUT and DELETE forms?
===========================================
Nope. It was at one point intended to support `PUT` and `DELETE` forms, but was later [dropped from the spec](3). There remains [ongoing discussion](4) about adding support for `PUT` and `DELETE`, as well as how to support content-types other than form-encoded data.
[1]: http://www.amazon.com/Restful-Web-Services-Leonard-Richardson/dp/0596529260
[2]: http://guides.rubyonrails.org/form_helpers.html#how-do-forms-with-put-or-delete-methods-work
[3]: http://www.w3.org/TR/html5-diff/#changes-2010-06-24
[4]: http://amundsen.com/examples/put-delete-forms/
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