Question

I am calling the Flickr data feed in WinJS for a Windows 8 Metro App. When I attempt to parse the feed response with JSON.parse, I get an Invalid Character error. Here is my code:

function processPhotos(result)
{
    var photoData = JSON.parse(result.responseText);
    //bind here
    data.items.forEach(function (item) {
        list.push(item);
    });
}

function processError(error) {
    console.log(error.message);
}

WinJS.xhr({ url: "http://api.flickr.com/services/feeds/photos_public.gne?format=json" }).then(processPhotos, processError);
WinJS.Namespace.define("data", {
    items: groupedItems,
    groups: groupedItems.groups,
    getItemsFromGroup: getItemsFromGroup
});

Result.ResponseText has the expected content.

Does anyone else encounter this?

Answer 1

If you look at the data, you will notice it’s not JSON, it’s JSONP. That’s the reason why JSON.parse() can’t process it. If you want normal JSON, according to the documentation, you should use nojsoncallback=1:

http://api.flickr.com/services/feeds/photos_public.gne?format=json&nojsoncallback=1