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const inputStream = new ReadableStream({
start(controller) {
interval = setInterval(() => {
let string = "Hello World!";
// Add the string to the stream
controller.enqueue(string);
// show it on the screen
let listItem = document.createElement('li');
listItem.textContent = string;
sent.appendChild(listItem);
}, 10000);
stopButton.addEventListener('click', function() {
clearInterval(interval);
controller.close();
})
},
pull(controller) {
// We don't really need a pull in this example
},
cancel() {
// This is called if the reader cancels,
// so we should stop generating strings
clearInterval(interval);
}
});
fetch("/echo", {method: 'POST', body: inputStream})
.then(response => {
const reader = response.body.getReader();
const decoder = new TextDecoder("utf-8");
function push() {
reader.read().then(({done, value}) => {
console.log("done:", done, "value:", value);
const string = decoder.decode(value);
// show it on the screen
let listItem = document.createElement('li');
if (done)
listItem.textContent = "<EOF>"
else
listItem.textContent = string;
received.appendChild(listItem);
if (done) return;
else push();
});
};
push();
});
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