jsonp.js
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/**
* JSONP client (Browser).
*/
import Promise from '../../promise';
export default function (request) {
return new Promise(resolve => {
var name = request.jsonp || 'callback', callback = request.jsonpCallback || '_jsonp' + Math.random().toString(36).substr(2), body = null, handler, script;
handler = ({type}) => {
var status = 0;
if (type === 'load' && body !== null) {
status = 200;
} else if (type === 'error') {
status = 500;
}
if (status && window[callback]) {
delete window[callback];
document.body.removeChild(script);
}
resolve(request.respondWith(body, {status}));
};
window[callback] = result => {
body = JSON.stringify(result);
};
request.abort = () => {
handler({type: 'abort'});
};
request.params[name] = callback;
if (request.timeout) {
setTimeout(request.abort, request.timeout);
}
script = document.createElement('script');
script.src = request.getUrl();
script.type = 'text/javascript';
script.async = true;
script.onload = handler;
script.onerror = handler;
document.body.appendChild(script);
});
}