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saves stream to file

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This commit is contained in:
Emily 2018-07-06 15:49:50 -07:00
parent 62ed0a411f
commit f98bc0878c
14 changed files with 136 additions and 201 deletions
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19
app/api.js
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@ -1,5 +1,5 @@
import { arrayToB64, b64ToArray, delay } from './utils';
import { ReadableStream as PolyRS} from 'web-streams-polyfill';
import { ReadableStream as PolyRS } from 'web-streams-polyfill';
import { createReadableStreamWrapper } from '@mattiasbuelens/web-streams-adapter';
const RS = createReadableStreamWrapper(PolyRS);
@ -202,9 +202,10 @@ export function uploadWs(encrypted, info, metadata, verifierB64, onprogress) {
////////////////////////
async function downloadS(id, keychain, onprogress, signal) {
async function downloadS(id, keychain, signal) {
const auth = await keychain.authHeader();
//this will be already funneled through serviceworker
const response = await fetch(`/api/download/${id}`, {
signal: signal,
method: 'GET',
@ -223,22 +224,20 @@ async function downloadS(id, keychain, onprogress, signal) {
const fileSize = response.headers.get('Content-Length');
//right now only chrome allows obtaining a stream from fetch
//for other browsers we fetch as a blob and convert to polyfill stream later
//for other browsers we fetch as a blob and convert to polyfill stream later
if (response.body) {
console.log("STREAM")
return RS(response.body);
}
return response.blob();
}
async function tryDownloadStream(id, keychain, onprogress, signal, tries = 1) {
async function tryDownloadStream(id, keychain, signal, tries = 1) {
try {
const result = await downloadS(id, keychain, onprogress, signal);
const result = await downloadS(id, keychain, signal);
return result;
} catch (e) {
if (e.message === '401' && --tries > 0) {
return tryDownloadStream(id, keychain, onprogress, signal, tries);
return tryDownloadStream(id, keychain, signal, tries);
}
if (e.name === 'AbortError') {
throw new Error('0');
@ -247,14 +246,14 @@ async function tryDownloadStream(id, keychain, onprogress, signal, tries = 1) {
}
}
export function downloadStream(id, keychain, onprogress) {
export function downloadStream(id, keychain) {
const controller = new AbortController();
function cancel() {
controller.abort();
}
return {
cancel,
result: tryDownloadStream(id, keychain, onprogress, controller.signal, 2)
result: tryDownloadStream(id, keychain, controller.signal, 2)
};
}