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Source code for jsonlint.com
http://www.jsonlint.com/
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JSON Validation only works if cut and paste data in? #12

Closed ergweb closed 12 years ago

ergweb commented 12 years ago

Our JSON only validates when pasted into the validators directly, for some reason providing this direct URL fails on your site:

http://api.erg.kcl.ac.uk/AirQuality/Json

If I cut n paste the data from the url above into these sites the JSON is valid?

http://jsonlint.com/

http://jslint.com/

http://jsonformatter.curiousconcept.com

The url is returning the correct content type in the response headers

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

Any ideas?

Thanks

ergweb commented 12 years ago

the raw JSON is below:

{"LAs":{"@ttl":"59","la":[{"@laname":"Barking and Dagenham","@laid":"1","@LaCentreLatitude":"51.538435","@LaCentreLongitude":"0.11467","@wgs84x":"12765.0060093","@wgs84y":"6717095.01808","site":[{"@sitename":"Barking and Dagenham - Rush Green","@sitecode":"BG1","@sitetype":"Suburban","@latitude":"51.563752","@longitude":"0.177891","@ttl":"59","@wgs84x":"19802.7355367","@wgs84y":"6721627.34498","species":[{"@speciesname":"Nitrogen Dioxide","@speciescode":"NO2","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"Sulphur Dioxide","@speciescode":"SO2","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]},{"@sitename":"Barking and Dagenham - Scrattons Farm","@sitecode":"BG2","@sitetype":"Suburban","@latitude":"51.529389","@longitude":"0.132857","@ttl":"59","@wgs84x":"14789.5735883","@wgs84y":"6715476.18683","species":[{"@speciesname":"Nitrogen Dioxide","@speciescode":"NO2","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"3","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]}]},{"@laname":"Barnet","@laid":"2","@LaCentreLatitude":"51.652929","@LaCentreLongitude":"-0.199606","@wgs84x":"-22220.038279","@wgs84y":"6737612.214325","site":[{"@sitename":"Barnet - Tally Ho Corner","@sitecode":"BN1","@sitetype":"Kerbside","@latitude":"51.614675","@longitude":"-0.176607","@ttl":"59","@wgs84x":"-19659.8013105","@wgs84y":"6730751.38494","species":[{"@speciesname":"Nitrogen Dioxide","@speciescode":"NO2","@aqindex":"2","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"3","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]},{"@sitename":"Barnet - Finchley","@sitecode":"BN2","@sitetype":"Urban Background","@latitude":"51.591901","@longitude":"-0.205992","@ttl":"59","@wgs84x":"-22930.9245475","@wgs84y":"6726669.62886","species":[{"@speciesname":"Nitrogen Dioxide","@speciescode":"NO2","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"3","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]}]},{"@laname":"Bexley","@laid":"3","@LaCentreLatitude":"51.441355","@LaCentreLongitude":"0.14861","@wgs84x":"16543.189527","@wgs84y":"6699738.789844","site":[{"@sitename":"Bexley - Manor Road West Gravimetric","@sitecode":"BQ5","@sitetype":"Industrial","@latitude":"51.478205","@longitude":"0.187462","@ttl":"59","@wgs84x":"20868.1743831","@wgs84y":"6706322.58301","species":{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"0","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}},{"@sitename":"Bexley - Manor Road East Gravimetric","@sitecode":"BQ6","@sitetype":"Industrial","@latitude":"51.477663155816","@longitude":"0.190763852438156","@ttl":"59","@wgs84x":"20619.592703","@wgs84y":"6706369.57357","species":{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"0","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}},{"@sitename":"Bexley - Belvedere West","@sitecode":"BQ7","@sitetype":"Urban Background","@latitude":"51.4947386340801","@longitude":"0.13431553018175","@ttl":"59","@wgs84x":"14951.9364255","@wgs84y":"6709278.28804","species":[{"@speciesname":"Nitrogen Dioxide","@speciescode":"NO2","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"Ozone","@speciescode":"O3","@aqindex":"0","@IndexSource":"Measurement","@dataend":"Thu, 01 Mar 2012 18:00:00 GMT"},{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"2","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM2.5 Particulate","@speciescode":"PM25","@aqindex":"2","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]},{"@sitename":"Bexley - Belvedere West FDMS","@sitecode":"BQ8","@sitetype":"Urban Background","@latitude":"51.4947386340801","@longitude":"0.13431553018175","@ttl":"59","@wgs84x":"14951.9364255","@wgs84y":"6709278.28804","species":{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"3","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}},{"@sitename":"Bexley - Belvedere FDMS","@sitecode":"BX0","@sitetype":"Suburban","@latitude":"51.490646","@longitude":"0.158882","@ttl":"59","@wgs84x":"17686.6633362","@wgs84y":"6708546.55118","species":{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"3","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}},{"@sitename":"Bexley - Slade Green","@sitecode":"BX1","@sitetype":"Suburban","@latitude":"51.465992795828","@longitude":"0.1848487862912","@ttl":"59","@wgs84x":"20577.2727637","@wgs84y":"6704140.10457","species":[{"@speciesname":"Nitrogen Dioxide","@speciescode":"NO2","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"Ozone","@speciescode":"O3","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"3","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"Sulphur Dioxide","@speciescode":"SO2","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]},{"@sitename":"Bexley - Belvedere","@sitecode":"BX2","@sitetype":"Suburban","@latitude":"51.490646","@longitude":"0.158882","@ttl":"59","@wgs84x":"17686.6633362","@wgs84y":"6708546.55118","species":[{"@speciesname":"Nitrogen Dioxide","@speciescode":"NO2","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"2","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM2.5 Particulate","@speciescode":"PM25","@aqindex":"1","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]},{"@sitename":"Bexley - Erith","@sitecode":"BX4","@sitetype":"Industrial","@latitude":"51.47769","@longitude":"0.190792","@ttl":"59","@wgs84x":"21238.8682874","@wgs84y":"6706230.53407","species":[{"@speciesname":"Nitrogen Dioxide","@speciescode":"NO2","@aqindex":"0","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"4","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM2.5 Particulate","@speciescode":"PM25","@aqindex":"3","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]},{"@sitename":"Greenwich and Bexley - Falconwood FDMS","@sitecode":"GB0","@sitetype":"Roadside","@latitude":"51.4563","@longitude":"0.085606","@ttl":"59","@wgs84x":"9529.61632885","@wgs84y":"6702408.29265","species":[{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"5","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM2.5 Particulate","@speciescode":"PM25","@aqindex":"5","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]},{"@sitename":"Greenwich and Bexley - Falconwood","@sitecode":"GB6","@sitetype":"Roadside","@latitude":"51.4563","@longitude":"0.085606","@ttl":"59","@wgs84x":"9529.61632885","@wgs84y":"6702408.29265","species":[{"@speciesname":"Nitrogen Dioxide","@speciescode":"NO2","@aqindex":"2","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"Ozone","@speciescode":"O3","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]}]},{"@laname":"Brent","@laid":"4","@LaCentreLatitude":"51.552255","@LaCentreLongitude":"-0.30262","@wgs84x":"-33687.504304","@wgs84y":"6719568.804179","site":[{"@sitename":"Brent - Ikea","@sitecode":"BT4","@sitetype":"Roadside","@latitude":"51.552476","@longitude":"-0.258089","@ttl":"59","@wgs84x":"-28730.3360593","@wgs84y":"6719608.36938","species":[{"@speciesname":"Nitrogen Dioxide","@speciescode":"NO2","@aqindex":"2","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"Ozone","@speciescode":"O3","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"6","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM2.5 Particulate","@speciescode":"PM25","@aqindex":"2","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]},{"@sitename":"Brent - Neasden Lane","@sitecode":"BT5","@sitetype":"Industrial","@latitude":"51.552656","@longitude":"-0.248774","@ttl":"59","@wgs84x":"-27693.3950026","@wgs84y":"6719640.59457","species":[{"@speciesname":"Nitrogen Dioxide","@speciescode":"NO2","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"4","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]},{"@sitename":"Brent - 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Horseferry Road","@sitecode":"WM0","@sitetype":"Urban Background","@latitude":"51.494681","@longitude":"-0.131938","@ttl":"59","@wgs84x":"-14687.2709763","@wgs84y":"6709267.98298","species":[{"@speciesname":"Nitrogen Dioxide","@speciescode":"NO2","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"Ozone","@speciescode":"O3","@aqindex":"1","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"4","@IndexSource":"Trigger","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"},{"@speciesname":"Sulphur Dioxide","@speciescode":"SO2","@aqindex":"0","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}]},{"@sitename":"Westminster - Oxford St","@sitecode":"WM6","@sitetype":"Kerbside","@latitude":"51.5139287404213","@longitude":"-0.152792701881935","@ttl":"59","@wgs84x":"-17008.8057704","@wgs84y":"6712710.23315","species":{"@speciesname":"PM10 Particulate","@speciescode":"PM10","@aqindex":"0","@IndexSource":"Measurement","@dataend":"Fri, 02 Mar 2012 13:00:00 GMT"}}]}]}}
umbrae commented 12 years ago

So I've figured this out, sort of.

It appears there's a zero-width nonbreaking space as the first character when we fetch your content. The (tricky) way you can see this is: Try to fetch your content using jsonlint, then go into the javascript console for the page and paste:

$('#json_input').val().charCodeAt(0)

And you'll get back:

65279

Which is the character code for a zero width nonbreaking space. I can verify this with python:

>>> import requests
>>> r = requests.get('http://api.erg.kcl.ac.uk/AirQuality/Json')
>>> r.content[:100]
'\xef\xbb\xbf{"LAs":{"@ttl":"59","la":[{"@laname":"Barking and Dagenham","@laid":"1","@LaCentreLatitude":"51.5'

Remove those and you should be good to go!

ergweb commented 12 years ago

Thank you so much for your time!

Ill try to fix this - the REST service is WCF .NET which has had some problems.

Ill let you know how I get on.

Reply to this email directly or view it on GitHub: https://github.com/umbrae/jsonlintdotcom/issues/12#issuecomment-4287055

ergweb commented 12 years ago

Changing this seemed to fix it - encoding UTF8 to encoding default

Creates 65279

return WebOperationContext.Current.CreateTextResponse(JSONResource.jsonElement, "application/json; charset=utf-8", Encoding.UTF8

Removes 65279

return WebOperationContext.Current.CreateTextResponse(JSONResource.jsonElement, "application/json; charset=utf-8", Encoding.Default

    // Test JSON
    // return Message object with Json string, json content type and default encoding (Gets an encoding for the operating system's current ANSI code page.)
    public Message GetJSON()
    {
        return WebOperationContext.Current.CreateTextResponse(JSONResource.jsonElement, "application/json; charset=utf-8", Encoding.Default);
    }