[Catalyst] Re: Converting a GET request to a POST request

Ronald J Kimball rkimball at pangeamedia.com
Tue Nov 23 16:56:29 GMT 2010

On Mon, Nov 22, 2010 at 3:12 PM, Aristotle Pagaltzis <pagaltzis at gmx.de> wrote:
> This is really, really, really bad. It’s roughly like modifying
> a file system to be allow file deletion as a side effect of
> opening a file. GET is supposed to be safe, that is, it should be
> free of side effects that the user cannot be held responsible
> for. It is very, very easy to get a browser to send GET requests
> incidentally, eg. by putting the link in a `<img src>` or
> a stylesheet `<link>` and getting a user to visit. Things like
> Google Web Accelerator and other automated user agents (like
> search engines of course) also generally assume that GET is safe.
> Much web infrastructure also assumes that GET requests are
> cacheable, so if there are any proxies between the app and the
> user, sending multiple pseudo-POST requests may not actually do
> anything.

I completely understand the points you're making here.  As I said, one
of the drawbacks of this solution is that it makes me feel really

For what it's worth, the REST methods that I want to expose in this
way are for posting responses to content.  There won't be any deletes.

> The same-origin policy is not there by mistake, but to keep your
> users safe from malicious 3rd party sites they may visit.

REST principles dictate that I use POST, not GET, for these requests.
The same-origin policy forces me to use JSONP, which can only make GET
requests, not POST.  What's the solution?


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