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Editorial Team
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Asked: 2026-06-12T23:41:44+00:00

I have developed a mobile site which consumes a JSON service. I consume JSONP

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I have developed a mobile site which consumes a JSON service. I consume JSONP as it’s cross-domain. It was working and suddenly broke, and I cannot fathom why. Here is what I can inspect in the browser:

My Javascript Call:

$.ajax({
url: apiBaseURL + "getoperators?appKey=" + appKey,
dataType: 'jsonp',
success: function(data) {
    console.log(data);
},
    error: function(jqXHR, textStatus, errorThrown) {             }
});

When I view the response it seems correctly formed as below:

{“GetOperatorsResult”:{“Error”:””,”Results”:[{“City”:”Cape Town”,”IsPublic”:true,”Mode”:”Bus”,”Name”:”Golden Arrow”},{“City”:”Cape Town”,”IsPublic”:true,”Mode”:”Shuttle”,”Name”:”Jammie Shuttle”},{“City”:”Cape Town”,”IsPublic”:true,”Mode”:”Train”,”Name”:”Metrorail”},{“City”:”Cape Town”,”IsPublic”:true,”Mode”:”Bus”,”Name”:”MyCiti”}],”Status”:”Success”}}

Here is the Network Audit:

Request URL:http://api.wimt.co.za/v1/json/public.svc/getoperators?appKey=EB478338-73C7-483F-8AB4-B4DE2219D4DC&callback=jQuery18208015921225305647_1350479608882&_=1350479608950
Request Method:GET
Status Code:200 OK
Request Headersview source
Accept:/
Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8
Cache-Control:max-age=0
Connection:keep-alive
Host:api.wimt.co.za
Referer:http://localhost:8300/index.html
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4
Query String Parametersview URL encoded
appKey:EB478338-73C7-483F-8AB4-B4DE2219D4DC
callback:jQuery18208015921225305647_1350479608882
_:1350479608950
Response Headersview source
Content-Length:353
Content-Type:application/json; charset=utf-8
Date:Wed, 17 Oct 2012 13:13:43 GMT
Server:Microsoft-IIS/7.5
X-Powered-By:ASP.NET

We are 1 day before launch and something which was working perfectly has broken and I cannot for the life of me work out what. The error could be in the web.config, but I have all the right headers/endpoints there.

Someone please help. Thank you!

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1 Answer

  1. Editorial Team

    It seems that the remote API no longer sends JSONP but plain JSON. In a valid JSONP call the response must be wrapped in the callback name:

    jQuery18208015921225305647_1350479608882({"GetOperatorsResult":{"Error":"","Results":[{"City":"Cape Town","IsPublic":true,"Mode":"Bus","Name":"Golden Arrow"},{"City":"Cape Town","IsPublic":true,"Mode":"Shuttle","Name":"Jammie Shuttle"},{"City":"Cape Town","IsPublic":true,"Mode":"Train","Name":"Metrorail"},{"City":"Cape Town","IsPublic":true,"Mode":"Bus","Name":"MyCiti"}],"Status":"Success"}})

    You should contact the owner of the API or read the documentation in order to understand how to specify a JSONP call.

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