fox-send/app/fileSender.js

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import Nanobus from 'nanobus';
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import OwnedFile from './ownedFile';
import Keychain from './keychain';
import { arrayToB64, bytes } from './utils';
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import { uploadWs } from './api';
import { encryptedSize } from './utils';
export default class FileSender extends Nanobus {
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constructor() {
super('FileSender');
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this.keychain = new Keychain();
this.reset();
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}
get progressRatio() {
return this.progress[0] / this.progress[1];
}
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get progressIndefinite() {
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return (
['fileSizeProgress', 'notifyUploadEncryptDone'].indexOf(this.msg) === -1
);
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}
get sizes() {
return {
partialSize: bytes(this.progress[0]),
totalSize: bytes(this.progress[1])
};
}
reset() {
this.uploadRequest = null;
this.msg = 'importingFile';
this.progress = [0, 1];
this.cancelled = false;
}
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cancel() {
this.cancelled = true;
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if (this.uploadRequest) {
this.uploadRequest.cancel();
}
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}
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async upload(archive, bearerToken) {
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const start = Date.now();
if (this.cancelled) {
throw new Error(0);
}
this.msg = 'encryptingFile';
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this.emit('encrypting');
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const totalSize = encryptedSize(archive.size);
const encStream = await this.keychain.encryptStream(archive.stream);
const metadata = await this.keychain.encryptMetadata(archive);
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const authKeyB64 = await this.keychain.authKeyB64();
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this.uploadRequest = uploadWs(
encStream,
metadata,
authKeyB64,
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archive.timeLimit,
archive.dlimit,
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bearerToken,
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p => {
this.progress = [p, totalSize];
this.emit('progress');
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}
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);
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if (this.cancelled) {
throw new Error(0);
}
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this.msg = 'fileSizeProgress';
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this.emit('progress'); // HACK to kick MS Edge
try {
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const result = await this.uploadRequest.result;
const time = Date.now() - start;
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this.msg = 'notifyUploadEncryptDone';
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this.uploadRequest = null;
this.progress = [1, 1];
const secretKey = arrayToB64(this.keychain.rawSecret);
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const ownedFile = new OwnedFile({
id: result.id,
url: `${result.url}#${secretKey}`,
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name: archive.name,
size: archive.size,
manifest: archive.manifest,
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time: time,
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speed: archive.size / (time / 1000),
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createdAt: Date.now(),
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expiresAt: Date.now() + archive.timeLimit * 1000,
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secretKey: secretKey,
nonce: this.keychain.nonce,
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ownerToken: result.ownerToken,
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dlimit: archive.dlimit,
timeLimit: archive.timeLimit
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});
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return ownedFile;
} catch (e) {
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this.msg = 'errorPageHeader';
this.uploadRequest = null;
throw e;
}
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}
}