I'm trying to calculate freight from mail using the Fetch JavaScript API, but it's returning the following error that I do not know how to solve.
Server was unable to process request. ---> System.Xml.XmlException: Root element is missing.
const btnCalcularFrete = document.querySelector('.calcular-frete');
const url = new URL('http://ws.correios.com.br/calculador/CalcPrecoPrazo.asmx');
const params = {
nCdServico: '04510,04014',
sCepOrigem: '86082-018',
sCepDestino: '13206-450',
nVlPeso: '2',
nCdFormato: '1',
nVlComprimento: 20,
nVlLargura: 20,
nVlAltura: 20,
nVlDiametro: '0',
sCdMaoPropria: 'n',
nVlValorDeclarado: 200,
sCdAvisoRecebimento: 'n',
}
url.search = new URLSearchParams(params);
function calcularFrete() {
fetch(url, {
method: "POST",
headers: {
"Content-Type": "text/xml; charset=utf-8",
},
})
.then(response => response.text())
.then(body => {
console.log(body);
})
}
btnCalcularFrete.addEventListener('click', calcularFrete);<button class="calcular-frete">Calcular</button>