Ohhh, I had no idea this functionality.

I just tested and works perfectly.

Many thanks for your help and explanations!

On 20 nov, 13:05, "T.J. Crowder" <t...@crowdersoftware.com> wrote:
> Hi,
>
> > Since I work with prototypejs AJAX requests to return, I always return
> > calls as application/json parsing the JSON object in the response, so
> > I had to always use something like the following to use the object:
>
> > var json = transport.responseText.evalJSON();
>
> There's no need to do that. Just use the transport.responseJSON
> property. Prototype detects  application/json responses, automatically
> evaluating the JSON and populating that property with it. Calling
> transport.responseText.evalJSON() just duplicates that effort.
>
> > However in the documentation of prototype, to use the JSON object
> > directly, they recommend using, for example:
>
> > var json = transport.headerJSON;
>
> > To proceed in this manner is necessary to write the header X-JSON
> > object with the contents of the JSON...
>
> This is just a useful way to send *additional* data related to the
> response on top of the primary response. So for instance, you might
> respond with text/html data but include an X-JSON header to supply
> further information about it.
>
> For what you're doing (an Ajax request specifically to get the data),
> I don't see any advantage; just keep doing what you're doing server-
> side and start using the responseJSON property.
>
> HTH,
> --
> T.J. Crowder
> Independent Software Consultant
> tj / crowder software / comwww.crowdersoftware.com
>
> On Nov 19, 5:39 pm, Moisés Gramary Barbosa <moigram...@gmail.com>
> wrote:
>
> > Hello everyone, firstly thank you very much.
>
> > I have the following questions:
>
> > Since I work with prototypejs AJAX requests to return, I always return
> > calls as application/json parsing the JSON object in the response, so
> > I had to always use something like the following to use the object:
>
> > var json = transport.responseText.evalJSON();
>
> > However in the documentation of prototype, to use the JSON object
> > directly, they recommend using, for example:
>
> > var json = transport.headerJSON;
>
> > To proceed in this manner is necessary to write the header X-JSON
> > object with the contents of the JSON...
>
> > My questions are:
>
> > What improvements can I do with this method?
> > PrototypeJS could not detect the response MimeType, as application/
> > json, and interpret it the same?
> > And last ... If I refactor my script to use the X-JSON header, the
> > response of the request should be empty?
>
> > Sorry for my English

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