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Función xhr para hacer llamadas ajax
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//funcion para hacer las llamadas ajax | |
function xhr (method, url, data, form, callback){ | |
var arr | |
var x = new XMLHttpRequest() | |
function buildQuery(url, data){ | |
var ret = []; | |
for (var d in data) ret.push(encodeURIComponent(d) + "=" + encodeURIComponent(data[d])); | |
var query = ret.join("&") | |
return (query) ? url + '?' + query : url; | |
} | |
if (method == 'get' || method == 'GET') { | |
arr = new FormData() | |
url = buildQuery(url, data); | |
}else{ | |
if (form) arr = new FormData(form); | |
//Agrega los campos al request | |
for (d in data) arr.append(d, data[d]); | |
} | |
//Abre el request | |
x.open(method, url, true) | |
//Coloca el tipo de respuesta que se espera recibir | |
x.responseType = "json" | |
//Envia el request con los campos | |
x.send(arr) | |
//Se espera la respuesta | |
x.onreadystatechange = function(){ | |
//Si no esta en un estado 4 no pasa (4 == DONE) | |
if (x.readyState != 4) { | |
// console.log('Esperando...', x.response, x.readyState, x.status) | |
return; | |
} | |
//Cuando termina si no devuelve un estado 200 o 201 hay algún error | |
status = true | |
if (x.status === 200 || x.status === 201){ | |
//callback(error, respuesta) | |
status = false | |
} | |
if (typeof callback == 'function') { | |
callback.call(status, x.response) | |
} | |
} | |
} |
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