jquery AJAX Post call to the Broker

Punit Shah

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Nov 24, 2014, 8:43:52 PM11/24/14

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I'm having a real hard time making a successful post call to the Broker. The call works when I'm using the chrome rest client. But as soon as I fire off an ajax call from javascript I get an error on the server side in the AbstractWadlGeneratorGrammarGenerator class where it can't find a bunch of grammar elements. Here's my call I'm making from my javascript class:

var postReq = {};

postReq.queryType = "topN";

postReq.dataSource = "stc";

postReq.granularity = "day";

postReq.dimension = "DIP";

postReq.threshold = "1";

postReq.metric = "Dur";

postReq.aggregations = [{"type": "doubleSum", "name": "Dur", "fieldName": "Duration"}];

postReq.intervals = ["2014-10-10/2014-10-18"];

$.ajax({

url: "http://192.168.1.8:8080/druid/v2/",

beforeSend: function(xhrObj){

xhrObj.setRequestHeader("Access-Control-Allow-Origin","*");

xhrObj.setRequestHeader("Accept","*/*");

xhrObj.setRequestHeader("Content-Type","application/json");

xhrObj.setRequestHeader("Access-Control-Allow-Headers","origin, content-type, accept, authorization");

},

type: 'post',

contentType: 'application/json',

data: JSON.stringify(postReq),

success: function (data, textStatus, jQxhr) {

alert("data = " + data);

},

error: function (jqXhr, textStatus, errorThrown) {

alert("error = " + errorThrown);

}});

Eric Tschetter

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Nov 25, 2014, 12:23:33 PM11/25/14

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Punit,

Nothing is jumping out at me about that javascript right now, could
you share the stacktrace for the server-side error?

--Eric

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Punit

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Nov 25, 2014, 1:26:02 PM11/25/14

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Eric,

Thanks for your response.

Spent quite a few hours on this. I finally had to resort to a work-around. I managed to get this working by writing a server-side proxy that acts as the intermediary between the javascript call and the broker. I initially had a similar problem with my web-app, which I created to handle this javascript. I ended up implementing a filter in the web-app to handle cross-site AJAX calls. Once this was done I could then communicate with the Broker via the intermediary web-app.

But as an FYI here is what I was seeing: