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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>HTML Test</title>
</head>
<body>
<h1>Open the Console! ===></h1>
</body>
<script>
async function fetchFromTestServer() {
try {
const res = await fetch('http://localhost:4000/'); //Will return CORS error
console.log(res);
} catch (err) {
console.log(err);
}
}
async function fetchFromProxyServerToTestServer(
method,
testServerRequest,
data
) {
const requestUri = encodeURIComponent(testServerRequest);
try {
if (data) {
const res = await fetch(`http://localhost:3000/${requestUri}`, {
method,
headers: {
'Content-type': 'application/json; charset=UTF-8'
},
body: JSON.stringify(data)
}); //Will not return CORS error
const responseData = await res.json();
console.log(responseData);
return;
}
const res = await fetch(`http://localhost:3000/${requestUri}`, {
method
}); //Will not return CORS error
const responseData = await res.json();
console.log(responseData);
} catch (err) {
console.log(err);
}
}
fetchFromTestServer();
// fetchFromProxyServerToTestServer('GET', 'https://pokeapi.co/api/v2/pokemon/?limit=150');
const data = {
name: 'Luiz',
email: 'luizfverissimo@mail.com'
};
// fetchFromProxyServerToTestServer('POST', 'http://localhost:4000/', data);
fetchFromProxyServerToTestServer('DELETE', 'http://localhost:4000/user/10');
</script>
</html>