305 lines
7.5 KiB
JavaScript
305 lines
7.5 KiB
JavaScript
import { arrayToB64, b64ToArray, delay } from './utils';
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import { ECE_RECORD_SIZE } from './ece';
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function post(obj) {
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return {
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method: 'POST',
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headers: new Headers({
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'Content-Type': 'application/json'
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}),
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body: JSON.stringify(obj)
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};
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}
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export function parseNonce(header) {
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header = header || '';
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return header.split(' ')[1];
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}
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async function fetchWithAuth(url, params, keychain) {
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const result = {};
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params = params || {};
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const h = await keychain.authHeader();
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params.headers = new Headers({ Authorization: h });
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const response = await fetch(url, params);
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result.response = response;
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result.ok = response.ok;
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const nonce = parseNonce(response.headers.get('WWW-Authenticate'));
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result.shouldRetry = response.status === 401 && nonce !== keychain.nonce;
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keychain.nonce = nonce;
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return result;
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}
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async function fetchWithAuthAndRetry(url, params, keychain) {
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const result = await fetchWithAuth(url, params, keychain);
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if (result.shouldRetry) {
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return fetchWithAuth(url, params, keychain);
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}
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return result;
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}
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export async function del(id, owner_token) {
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const response = await fetch(`/api/delete/${id}`, post({ owner_token }));
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return response.ok;
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}
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export async function setParams(id, owner_token, params) {
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const response = await fetch(
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`/api/params/${id}`,
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post({
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owner_token,
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dlimit: params.dlimit
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})
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);
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return response.ok;
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}
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export async function fileInfo(id, owner_token) {
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const response = await fetch(`/api/info/${id}`, post({ owner_token }));
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if (response.ok) {
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const obj = await response.json();
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return obj;
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}
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throw new Error(response.status);
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}
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export async function metadata(id, keychain) {
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const result = await fetchWithAuthAndRetry(
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`/api/metadata/${id}`,
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{ method: 'GET' },
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keychain
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);
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if (result.ok) {
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const data = await result.response.json();
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const meta = await keychain.decryptMetadata(b64ToArray(data.metadata));
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return {
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size: meta.size,
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ttl: data.ttl,
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iv: meta.iv,
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name: meta.name,
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type: meta.type,
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manifest: meta.manifest
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};
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}
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throw new Error(result.response.status);
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}
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export async function setPassword(id, owner_token, keychain) {
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const auth = await keychain.authKeyB64();
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const response = await fetch(
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`/api/password/${id}`,
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post({ owner_token, auth })
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);
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return response.ok;
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}
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function asyncInitWebSocket(server) {
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return new Promise(resolve => {
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const ws = new WebSocket(server);
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ws.onopen = () => {
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resolve(ws);
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};
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});
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}
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function listenForResponse(ws, canceller) {
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return new Promise((resolve, reject) => {
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ws.addEventListener('message', function(msg) {
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try {
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const response = JSON.parse(msg.data);
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if (response.error) {
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throw new Error(response.error);
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} else {
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resolve({
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url: response.url,
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id: response.id,
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ownerToken: response.owner
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});
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}
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} catch (e) {
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ws.close();
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canceller.cancelled = true;
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canceller.error = e;
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reject(e);
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}
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});
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});
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}
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async function upload(stream, metadata, verifierB64, onprogress, canceller) {
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const host = window.location.hostname;
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const port = window.location.port;
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const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
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const endpoint =
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window.location.protocol === 'file:'
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? 'wss://send2.dev.lcip.org/api/ws'
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: `${protocol}//${host}:${port}/api/ws`;
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const ws = await asyncInitWebSocket(endpoint);
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try {
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const metadataHeader = arrayToB64(new Uint8Array(metadata));
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const fileMeta = {
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fileMetadata: metadataHeader,
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authorization: `send-v1 ${verifierB64}`
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};
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const responsePromise = listenForResponse(ws, canceller);
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ws.send(JSON.stringify(fileMeta));
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const reader = stream.getReader();
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let state = await reader.read();
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let size = 0;
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while (!state.done) {
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const buf = state.value;
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if (canceller.cancelled) {
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throw canceller.error;
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}
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ws.send(buf);
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onprogress(size);
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size += buf.length;
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state = await reader.read();
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while (ws.bufferedAmount > ECE_RECORD_SIZE * 2) {
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await delay();
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}
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}
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const footer = new Uint8Array([0]);
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ws.send(footer);
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const response = await responsePromise; //promise only fufills if response is good
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ws.close();
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return response;
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} catch (e) {
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ws.close(4000);
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throw e;
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}
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}
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export function uploadWs(encrypted, metadata, verifierB64, onprogress) {
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const canceller = { cancelled: false };
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return {
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cancel: function() {
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canceller.error = new Error(0);
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canceller.cancelled = true;
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},
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result: upload(encrypted, metadata, verifierB64, onprogress, canceller)
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};
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}
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////////////////////////
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async function downloadS(id, keychain, signal) {
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const auth = await keychain.authHeader();
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const response = await fetch(`/api/download/${id}`, {
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signal: signal,
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method: 'GET',
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headers: { Authorization: auth }
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});
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const authHeader = response.headers.get('WWW-Authenticate');
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if (authHeader) {
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keychain.nonce = parseNonce(authHeader);
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}
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if (response.status !== 200) {
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throw new Error(response.status);
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}
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//const fileSize = response.headers.get('Content-Length');
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return response.body;
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}
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async function tryDownloadStream(id, keychain, signal, tries = 1) {
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try {
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const result = await downloadS(id, keychain, signal);
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return result;
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} catch (e) {
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if (e.message === '401' && --tries > 0) {
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return tryDownloadStream(id, keychain, signal, tries);
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}
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if (e.name === 'AbortError') {
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throw new Error('0');
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}
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throw e;
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}
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}
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export function downloadStream(id, keychain) {
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const controller = new AbortController();
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function cancel() {
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controller.abort();
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}
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return {
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cancel,
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result: tryDownloadStream(id, keychain, controller.signal, 2)
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};
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}
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//////////////////
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function download(id, keychain, onprogress, canceller) {
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const xhr = new XMLHttpRequest();
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canceller.oncancel = function() {
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xhr.abort();
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};
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return new Promise(async function(resolve, reject) {
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xhr.addEventListener('loadend', function() {
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canceller.oncancel = function() {};
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const authHeader = xhr.getResponseHeader('WWW-Authenticate');
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if (authHeader) {
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keychain.nonce = parseNonce(authHeader);
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}
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if (xhr.status !== 200) {
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return reject(new Error(xhr.status));
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}
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const blob = new Blob([xhr.response]);
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resolve(blob);
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});
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xhr.addEventListener('progress', function(event) {
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if (event.lengthComputable && event.target.status === 200) {
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onprogress([event.loaded, event.total]);
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}
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});
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const auth = await keychain.authHeader();
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xhr.open('get', `/api/download/${id}`);
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xhr.setRequestHeader('Authorization', auth);
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xhr.responseType = 'blob';
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xhr.send();
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onprogress([0, 1]);
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});
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}
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async function tryDownload(id, keychain, onprogress, canceller, tries = 1) {
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try {
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const result = await download(id, keychain, onprogress, canceller);
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return result;
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} catch (e) {
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if (e.message === '401' && --tries > 0) {
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return tryDownload(id, keychain, onprogress, canceller, tries);
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}
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throw e;
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}
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}
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export function downloadFile(id, keychain, onprogress) {
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const canceller = {
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oncancel: function() {} // download() sets this
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};
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function cancel() {
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canceller.oncancel();
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}
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return {
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cancel,
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result: tryDownload(id, keychain, onprogress, canceller, 2)
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};
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}
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