[Seaside] How can I provide AJAX calls to 3er party libraries?

[Mariano Martinez Peck]

Hi Jupiter,

Thank you very much for your code. That was exactly what I was looking for
and it did work!  It looks like indeed you have worked with callbacks :)

Best regards,

On Wed, Jan 11, 2017 at 7:21 PM, Jupiter Jones <jupiter.jones at mail.com>
wrote:

> Hi Mariano,
>
> I’ve been trying to work out callbacks recently. There seems to be a
> number of ways of doing this depending on your requirements. There may be
> typos in the following but hopefully it points you in the right direction :)
>
> In the example you provided, the JSON is coming from an external server.
> I’m guessing that you want the JSON coming from your own backend via
> seaside.
>
> renderContentOn: canvas
> | start end |
> (canvas jQuery getJson
>         callback: [ :eventData |
>  start := eventData first.
> end := eventData last ]
>           value: (JSStream on: 'new Array(Math.round(e.min),Math.
> round(e.max))'));
>         text: [ :stream |
>               stream
>                 json:
>                       GRSmallDictionary new
>                         at: ’someKey' put: ’someValue';
>                         yourself ]) ];
>         onSuccess: ((JSStream on: 'chart.series[0].setData(data);')
> asFunction: #(‘data'));
>         dataType: 'jsonp').
>
> or
>
> (html jQuery ajax
> callback: [ :eventData | self doSomething: eventData ]
> json: (JSStream on: 'new Array(Math.round(e.min),Math.round(e.max))'));
>
> Then you can respond from somewhere in #doSomething:
>
> doSomething: eventData
> | start end jsonResponse |
> start := eventData first.
> end := eventData last.
> jsonResponse := GRSmallDictionary new at: ‘someKey’ put: ‘someValue’;
> yourself.
>  self requestContext
>     respond: [ :response |
>       response
>         doNotCache;
>         contentType:
>             (WAMimeType applicationJson charset: self requestContext
> handler charSet).
>       response stream json: jsonRespnose
>
> Alternatively if you need to specify a URL that the JS Library may use
> many times and pass or post query options, you can do something like:
>
> urlForCallbacksFromJSLib
>   | connectorUrl |
>   connectorUrl := self renderContext actionUrl copy
>     addField:
>         (self renderContext callbacks
>             store: (JSAjaxCallback on: [ self processCallback ]));
>     yourself.
>   self url: connectorUrl
>
> …and then you can do whatever you need in the #processCallback method...
>
> processCallback
>   | start end jsonRespnose |
> start := self requestContext request at: ‘start’.
> end := self requestContext request at: ‘end’.
>   jsonRespnose := self jsonObjectToBeReturnedToClient
>   self requestContext
>     respond: [ :response |
>       response
>         doNotCache;
>         contentType:
>             (WAMimeType applicationJson charset: self requestContext
> handler charSet).
>       response stream json: jsonRespnose ]
>
> I hope there’s something there that will help.
>
> Cheers,
>
> J
>
> On 12 Jan 2017, at 3:15 am, Mariano Martinez Peck <marianopeck at gmail.com>
> wrote:
>
> Hi guys,
>
> I know how to use AJAX but always everything inside Seaside. I know need a
> way to provide JSON responses to AJAX calls made by a 3er party lib. For
> example, in Highstocks [1], there is an example like this:
>
>
>   /**
>      * Load new data depending on the selected min and max
>      */
>     function afterSetExtremes(e) {
>
>         var chart = Highcharts.charts[0];
>
>         chart.showLoading('Loading data from server...');
>       *
> $.getJSON('https://www.highcharts.com/samples/data/from-sql.php?start=
> <https://www.highcharts.com/samples/data/from-sql.php?start=>' +
> Math.round(e.min) +*
> *                '&end=' + Math.round(e.max) + '&callback=?', function
> (data) {*
>
>             chart.series[0].setData(data);
>             chart.hideLoading();
>       *  });*
>     }
>
>
>
> So... how could I provide that at my server side?
>
>
> Above JS would be code that I write in Seaside and it is passed to the
> client. Therefore, I THINK I am able to write that JS generating a URL with
> the correct _s and _k or whatever..
>
> Thanks in advance for any lead you can give me here.
>
> --
> Mariano
> http://marianopeck.wordpress.com
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>
>
>
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>
>


-- 
Mariano
http://marianopeck.wordpress.com
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