Rails 3 and application/json

I have a rails 2 app that I am upgrading to rails 3.

I am exposing a web service to a phone app. When I make a request
from the phone application the CONTENT_TYPE is application/json

In rails 2 my controller recognizes this as json, but in rails 3 my
controller recognizes it as html.

  respond_to do |format|
    format.html {  }
    format.json { }
  end

Any ideas why the format isn’t being set to json in rails 3? Do i
have to do something to enable json routing?

On 08 Jun 2011, at 09:17, pipplo wrote:

   format.json { }
 end

Any ideas why the format isn’t being set to json in rails 3? Do i
have to do something to enable json routing?

This might be useful:
http://ryandaigle.com/articles/2009/8/10/what-s-new-in-edge-rails-default-restful-rendering

Best regards

Peter De Berdt

I replied to this earlier but I think I may have accidentally clicked
discard instead of send. Sorry if this is a duplicate:

I tried that method (using respond_with). Even then the requests gets
processed as HTML.

So on my Rails 2 setup just setting CONTENT_TYPE = ‘application/json’
causes the request to be processed as a json format.

On Rails 3 that isn’t working so everything gets set as HTML. Do I
need to set HTTP_ACCEPT instead of CONTENT_TYPE? I get the feeling
Rails 3 uses CONTENT_TYPE for the incoming parsing (since the incoming
json is parsed correctly) and I need to set some other type to force a
JSON response. It isn’t clear where that should be set though.

Thanks

Joe

On 08 Jun 2011, at 22:02, pipplo wrote:

need to set HTTP_ACCEPT instead of CONTENT_TYPE? I get the feeling
Rails 3 uses CONTENT_TYPE for the incoming parsing (since the incoming
json is parsed correctly) and I need to set some other type to force a
JSON response. It isn’t clear where that should be set though.

Can you verify that the following headers are present, the accept
header might actually be what you’re missing out on:

Accept: application/json
Content-Type: application/json

If everything goes well, you should get back a response with this in
the header:

Content-Type: application/json; charset=utf-8

For XML that would be:

Accept: application/xml
Content-Type: application/xml

Best regards

Peter De Berdt

I will try to set HTTP_ACCEPT when I get home. I know it’s not being
set
now, but I wasn’t sure if it was required or not.

Something must have changed from 2.3.4 to 3 or I set some configuration
in
2.3.4 that I dont remember…

Thanks. Just in case anyone is curious adding the Accept headers worked
perfect!

On 08 Jun 2011, at 22:22, Joe Koston wrote:

I will try to set HTTP_ACCEPT when I get home. I know it’s not
being set now, but I wasn’t sure if it was required or not.

Something must have changed from 2.3.4 to 3 or I set some
configuration in 2.3.4 that I dont remember…

Well, the Accept header is what tells the server what response you
accept, while the Content-Type header tells the server what type of
data the posted data is, as you can read at
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html

Rails 2 might have been more forgiving or you might have just
appended .json to the url, but Rails 3 has the correct behaviour.

Best regards

Peter De Berdt

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