[rabbitmq-discuss] accessing rabbitmq with json-rpc

[huffl...@hush.com]

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I'm trying to access my rabbitmq server using the json-rpc plugin
on my local machine using a js client (specifically, jquery).

Specifically, if I followed the examples correctly, I'm trying to
POST my requests to http://localhost:55670/rpc/rabbitmq

The problem I have is firefox blocking my request or rather turning
it into a preflight OPTIONS request, for which the corresponding
server should reply with some message allowing CORS (which rabbitmq
obviously doesn't do).

The examples in the plugin rabbitmq_jsonrpc_channel_examples don't
have this problem, since they sit on the same port, and are not
subject to CORS.

I got this problem only when I changed the contentType in my ajax
request to application/json. Apparently, this contentType requires
CORS, whereas the default application/x-www-form-urlencoded is
considered safe. Sending the data as application/x-www-form-
urlencoded doesn't get you any reply from rabbitmq.

I have no problem POSTing to rabbitmq with curl, so this is
obviously due to the limitation of the browser.

What am I doing wrong? Is it even possible to send a POST request
to rabbitmq without changing the example plugin and loading it
straight into rabbitmq? Otherwise (sorry if this sounds rude) what
is the point of json-rpc?

Maybe this is a really trivial question, but I've been looking for
an answer for the better part of the day.

Some references from what I've dug up:
https://groups.google.com/group/rabbitmq-
discuss/browse_thread/thread/5d3ad18f7c48b020?fwc=1

Thanks in advance
Jason
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[Simon MacMullen]

On 18/06/11 16:11, huffl...@hush.com wrote:
> What am I doing wrong? Is it even possible to send a POST request
> to rabbitmq without changing the example plugin and loading it
> straight into rabbitmq? Otherwise (sorry if this sounds rude) what
> is the point of json-rpc?

I assume that most people using json-rpc either:

1) Play with it in a trivial manner (i.e. serve static content with
RabbitMQ)

or

2) Use some HTTP proxying to make it seem like part of the same domain

or

3) Use it with some server-side http messaging (I think someone wrote a
PHP library which talks to JSON-RPC rather than AMQP?)

Having said that, it seems like CORS support would be a sensible thing
to add. Having said *that*, rabbitmq-jsonrpc-channel doesn't really have
a maintainer now, so I can't promise anything.

Cheers, Simon

--
Simon MacMullen
RabbitMQ, VMware