106 lines
2.7 KiB
JavaScript
106 lines
2.7 KiB
JavaScript
let files = [];
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let socket = null;
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let fileIndex = 0;
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let byteIndex = 0;
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function sendMetadata() {
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const metadata = files.map((file) => ({
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name: file.name,
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size: file.size,
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modtime: file.lastModified,
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}));
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socket.send(JSON.stringify(metadata));
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}
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function finishSending() {
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if (socket.bufferedAmount > 0) {
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window.setTimeout(finishSending, 1000);
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return;
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}
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socket.close();
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alert("done");
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}
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function sendData() {
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if (fileIndex >= files.length) {
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finishSending();
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}
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const currentFile = files[fileIndex];
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if (byteIndex < currentFile.size) {
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const endpoint = Math.min(byteIndex+8192, currentFile.size);
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const data = currentFile.slice(byteIndex, endpoint);
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socket.send(data);
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byteIndex = endpoint;
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} else {
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fileIndex += 1;
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byteIndex = 0;
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sendData();
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}
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}
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const fileInput = document.getElementById('file_input');
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const fileInputMessage = document.getElementById('file_input_message');
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const fileList = document.getElementById('file_list');
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const uploadButton = document.getElementById('upload');
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function updateButtons() {
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if (files.length === 0) {
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uploadButton.disabled = true;
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fileInputMessage.textContent = 'Select files to upload...';
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} else {
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uploadButton.disabled = false;
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fileInputMessage.textContent = 'Select more files to upload...';
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}
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}
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updateButtons();
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function addFile(newFile) {
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if (files.some((oldFile) => newFile.name === oldFile.name)) { return; }
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files.push(newFile);
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const listEntry = document.createElement('li');
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const deleteButton = document.createElement('button');
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deleteButton.textContent = 'x';
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deleteButton.addEventListener('click', () => {
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removeFile(newFile.name);
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listEntry.remove();
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updateButtons();
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});
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const entryName = document.createElement('span');
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entryName.textContent = newFile.name;
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listEntry.appendChild(deleteButton);
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listEntry.appendChild(entryName);
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fileList.appendChild(listEntry);
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}
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function removeFile(name) {
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files = files.filter((file) => file.name !== name);
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}
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fileInput.addEventListener('input', (e) => {
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for (const file of e.target.files) { addFile(file); }
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updateButtons();
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e.target.value = '';
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});
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uploadButton.addEventListener('click', (e) => {
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if (files.length === 0) { return; }
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fileInput.disabled = true;
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for (const button of document.getElementsByTagName('button')) {
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button.disabled = true;
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}
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socket = new WebSocket('ws://localhost:3000/upload');
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socket.addEventListener('open', sendMetadata);
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socket.addEventListener('message', (msg) => {
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if (msg.data === 'ack') {
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sendData();
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}
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});
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})
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