jakob/PairDrop
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revert zipping and unzipping files on transfer to minimize needed browser memory. Use fileQueue instead.

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This commit is contained in:
schlagmichdoch 2023-01-27 01:27:22 +01:00
parent 1278009706
commit d35c27aa91
3 changed files with 169 additions and 176 deletions
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2
README.md
View file

@ -28,8 +28,6 @@ Developed based on [Snapdrop](https://github.com/RobinLinus/snapdrop)
* Multiple files are downloaded as ZIP file
* On iOS and Android the devices share menu is opened instead of downloading the files
* Multiple files are transferred at once with an overall progress indicator
* The integrity of the files is checked on receive
* All metadata is preserved
### Share Files Directly From Share / Context Menu
* [Share files directly from context menu on Windows](/docs/how-to.md#share-files-directly-from-context-menu-on-windows)

228
public/scripts/network.js
View file

@ -197,27 +197,13 @@ class Peer {
}
async createHeader(file) {
let hashHex = await this.getHashHex(file);
return {
name: file.name,
mime: file.type,
size: file.size,
hashHex: hashHex
};
}
async getHashHex(file) {
if (!crypto.subtle) {
console.warn("PairDrops functionality to compare received with requested files works in secure contexts only (https or localhost).")
return;
}
const hashBuffer = await crypto.subtle.digest('SHA-256', await file.arrayBuffer());
// Convert hex to hash, see https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/digest#converting_a_digest_to_a_hex_string
const hashArray = Array.from(new Uint8Array(hashBuffer));
const hashHex = hashArray.map(b => b.toString(16).padStart(2, '0')).join(''); // convert bytes to hex string
return(hashHex);
}
getResizedImageDataUrl(file, width = undefined, height = undefined, quality = 0.7) {
return new Promise((resolve) => {
let image = new Image();
@ -254,58 +240,46 @@ class Peer {
}
async requestFileTransfer(files) {
Events.fire('set-progress', {peerId: this._peerId, progress: 0, status: 'prepare'})
let header = [];
let combinedSize = 0;
let totalSize = 0;
let imagesOnly = true
for (let i=0; i<files.length; i++) {
Events.fire('set-progress', {peerId: this._peerId, progress: 0.8*i/files.length, status: 'prepare'})
header.push(await this.createHeader(files[i]));
combinedSize += files[i].size;
totalSize += files[i].size;
if (files[i].type.split('/')[0] !== 'image') imagesOnly = false;
}
this._fileHeaderRequested = header;
let bytesCompleted = 0;
zipper.createNewZipWriter();
for (let i=0; i<files.length; i++) {
await zipper.addFile(files[i], {
onprogress: (progress) => {
Events.fire('set-progress', {
peerId: this._peerId,
progress: (bytesCompleted + progress) / combinedSize,
status: 'prepare'
})
}
});
bytesCompleted += files[i].size;
}
this.zipFileRequested = await zipper.getZipFile();
Events.fire('set-progress', {peerId: this._peerId, progress: 0.8, status: 'prepare'})
let dataUrl = '';
if (files[0].type.split('/')[0] === 'image') {
this.getResizedImageDataUrl(files[0], 400, null, 0.9).then(dataUrl => {
this.sendJSON({type: 'request',
header: header,
size: combinedSize,
thumbnailDataUrl: dataUrl
});
})
} else {
this.sendJSON({type: 'request',
header: header,
size: combinedSize,
});
dataUrl = await this.getResizedImageDataUrl(files[0], 400, null, 0.9);
}
Events.fire('set-progress', {peerId: this._peerId, progress: 1, status: 'prepare'})
this._filesRequested = files;
this.sendJSON({type: 'request',
header: header,
totalSize: totalSize,
imagesOnly: imagesOnly,
thumbnailDataUrl: dataUrl
});
Events.fire('set-progress', {peerId: this._peerId, progress: 0, status: 'wait'})
}
async sendFiles() {
this._filesQueue.push({zipFile: this.zipFileRequested, fileHeader: this._fileHeaderRequested});
this._fileHeaderRequested = null
for (let i=0; i<this._filesRequested.length; i++) {
this._filesQueue.push(this._filesRequested[i]);
}
this._filesRequested = null
if (this._busy) return;
this._dequeueFile();
}
_dequeueFile() {
if (!this._filesQueue.length) return;
this._busy = true;
const file = this._filesQueue.shift();
this._sendFile(file);
@ -314,10 +288,11 @@ class Peer {
async _sendFile(file) {
this.sendJSON({
type: 'header',
size: file.zipFile.size,
fileHeader: file.fileHeader
size: file.size,
name: file.name,
mime: file.type
});
this._chunker = new FileChunker(file.zipFile,
this._chunker = new FileChunker(file,
chunk => this._send(chunk),
offset => this._onPartitionEnd(offset));
this._chunker.nextPartition();
@ -384,92 +359,116 @@ class Peer {
this.sendJSON({type: 'files-transfer-response', accepted: false});
return;
}
this._requestPending = true;
if (window.iOS && request.totalSize >= 200*1024*1024) {
// iOS Safari can only put 400MB at once to memory.
// Request to send them in chunks of 200MB instead:
this.sendJSON({type: 'files-transfer-response', accepted: false, reason: 'ios-memory-limit'});
return;
}
this._requestPending = request;
Events.fire('files-transfer-request', {
request: request,
peerId: this._peerId
});
}
_respondToFileTransferRequest(header, accepted) {
this._requestPending = false;
this._acceptedHeader = header;
_respondToFileTransferRequest(accepted) {
this.sendJSON({type: 'files-transfer-response', accepted: accepted});
if (accepted) this._busy = true;
if (accepted) {
this._requestAccepted = this._requestPending;
this._totalBytesReceived = 0;
this._busy = true;
this._filesReceived = [];
}
this._requestPending = null;
}
_onFilesHeader(msg) {
if (JSON.stringify(this._acceptedHeader) === JSON.stringify(msg.fileHeader)) {
_onFilesHeader(header) {
if (this._requestAccepted?.header.length) {
this._lastProgress = 0;
this._digester = new FileDigester(msg.size, blob => this._onFileReceived(blob, msg.fileHeader));
this._acceptedHeader = null;
this._digester = new FileDigester({size: header.size, name: header.name, mime: header.mime},
this._requestAccepted.totalSize,
this._totalBytesReceived,
fileBlob => this._onFileReceived(fileBlob)
);
}
}
_abortTransfer() {
Events.fire('set-progress', {peerId: this._peerId, progress: 1, status: 'wait'});
Events.fire('notify-user', 'Files are incorrect.');
this._filesReceived = [];
this._requestAccepted = null;
this._digester = null;
throw new Error("Received files differ from requested files. Abort!");
}
_onChunkReceived(chunk) {
if(!this._digester || !(chunk.byteLength || chunk.size)) return;
this._digester.unchunk(chunk);
const progress = this._digester.progress;
if (progress > 1) {
this._abortTransfer();
}
this._onDownloadProgress(progress);
// occasionally notify sender about our progress
if (progress - this._lastProgress < 0.01) return;
if (progress - this._lastProgress < 0.005 && progress !== 1) return;
this._lastProgress = progress;
this._sendProgress(progress);
}
_onDownloadProgress(progress) {
if (this._busy) {
Events.fire('set-progress', {peerId: this._peerId, progress: progress, status: 'transfer'});
}
Events.fire('set-progress', {peerId: this._peerId, progress: progress, status: 'transfer'});
}
async _onFileReceived(zipBlob, fileHeader) {
Events.fire('set-progress', {peerId: this._peerId, progress: 0, status: 'process'});
this._busy = false;
async _onFileReceived(fileBlob) {
const acceptedHeader = this._requestAccepted.header.shift();
this._totalBytesReceived += fileBlob.size;
this.sendJSON({type: 'file-transfer-complete'});
let zipEntries = await zipper.getEntries(zipBlob);
let files = [];
for (let i=0; i<zipEntries.length; i++) {
let fileBlob = await zipper.getData(zipEntries[i]);
let hashHex = await this.getHashHex(fileBlob);
let sameHex = hashHex === fileHeader[i].hashHex;
let sameSize = fileBlob.size === fileHeader[i].size;
let sameName = zipEntries[i].filename === fileHeader[i].name
if (!sameHex || !sameSize || !sameName) {
Events.fire('notify-user', 'Files are malformed.');
Events.fire('set-progress', {peerId: this._peerId, progress: 1, status: 'wait'});
throw new Error("Received files differ from requested files. Abort!");
}
files.push(new File([fileBlob], zipEntries[i].filename, {
type: fileHeader[i].mime,
lastModified: new Date().getTime()
}));
const sameSize = fileBlob.size === acceptedHeader.size;
const sameName = fileBlob.name === acceptedHeader.name
if (!sameSize || !sameName) {
this._abortTransfer();
}
this._filesReceived.push(fileBlob);
if (!this._requestAccepted.header.length) {
this._busy = false;
Events.fire('set-progress', {peerId: this._peerId, progress: 0, status: 'process'});
Events.fire('files-received', {sender: this._peerId, files: this._filesReceived, request: this._requestAccepted});
this._filesReceived = [];
this._requestAccepted = null;
}
Events.fire('files-received', {sender: this._peerId, files: files});
}
_onFileTransferCompleted() {
this._onDownloadProgress(1);
this._digester = null;
this._busy = false;
this._dequeueFile();
Events.fire('notify-user', 'File transfer completed.');
this._chunker = null;
if (!this._filesQueue.length) {
this._busy = false;
Events.fire('notify-user', 'File transfer completed.');
} else {
this._dequeueFile();
}
}
_onFileTransferRequestResponded(message) {
if (!message.accepted) {
Events.fire('set-progress', {peerId: this._peerId, progress: 1, status: 'wait'});
this.zipFile = null;
this._filesRequested = null;
if (message.reason === 'ios-memory-limit') {
Events.fire('notify-user', "Sending files to iOS is only possible up to 200MB at once");
}
return;
}
Events.fire('file-transfer-accepted');
Events.fire('set-progress', {peerId: this._peerId, progress: 1, status: 'transfer'});
this.sendFiles();
}
@ -690,16 +689,20 @@ class PeersManager {
}
_onRespondToFileTransferRequest(detail) {
this.peers[detail.to]._respondToFileTransferRequest(detail.header, detail.accepted);
this.peers[detail.to]._respondToFileTransferRequest(detail.accepted);
}
_onFilesSelected(message) {
let inputFiles = Array.from(message.files);
delete message.files;
let files = [];
for (let i=0; i<message.files.length; i++) {
// when filename is empty guess via suffix
const file = message.files[i].type
? message.files[i]
: new File([message.files[i]], message.files[i].name, {type: mime.getMimeByFilename(message.files[i].name)});
const l = inputFiles.length;
for (let i=0; i<l; i++) {
// when filetype is empty guess via suffix
const inputFile = inputFiles.shift();
const file = inputFile.type
? inputFile
: new File([inputFile], inputFile.name, {type: mime.getMimeByFilename(inputFile.name)});
files.push(file)
}
this.peers[message.to].requestFileTransfer(files);
@ -779,30 +782,35 @@ class FileChunker {
isFileEnd() {
return this._offset >= this._file.size;
}
get progress() {
return this._offset / this._file.size;
}
}
class FileDigester {
constructor(size, callback) {
constructor(meta, totalSize, totalBytesReceived, callback) {
this._buffer = [];
this._bytesReceived = 0;
this._size = size;
this._size = meta.size;
this._name = meta.name;
this._mime = meta.mime;
this._totalSize = totalSize;
this._totalBytesReceived = totalBytesReceived;
this._callback = callback;
}
unchunk(chunk) {
this._buffer.push(chunk);
this._bytesReceived += chunk.byteLength || chunk.size;
this.progress = this._bytesReceived / this._size;
this.progress = (this._totalBytesReceived + this._bytesReceived) / this._totalSize;
if (isNaN(this.progress)) this.progress = 1
if (this._bytesReceived < this._size) return;
// we are done
this._callback(new Blob(this._buffer));
const blob = new Blob(this._buffer)
this._buffer = null;
this._callback(new File([blob], this._name, {
type: this._mime,
lastModified: new Date().getTime()
}));
}
}

115
public/scripts/ui.js
View file

@ -471,21 +471,21 @@ class ReceiveFileDialog extends ReceiveDialog {
this.$shareOrDownloadBtn = this.$el.querySelector('#shareOrDownload');
this.$receiveTitleNode = this.$el.querySelector('#receiveTitle')
Events.on('files-received', e => this._onFilesReceived(e.detail.sender, e.detail.files));
Events.on('files-received', e => this._onFilesReceived(e.detail.sender, e.detail.files, e.detail.request));
this._filesQueue = [];
}
_onFilesReceived(sender, files) {
this._nextFiles(sender, files);
_onFilesReceived(sender, files, request) {
this._nextFiles(sender, files, request);
window.blop.play();
}
_nextFiles(sender, nextFiles) {
if (nextFiles) this._filesQueue.push({peerId: sender, files: nextFiles});
_nextFiles(sender, nextFiles, nextRequest) {
if (nextFiles) this._filesQueue.push({peerId: sender, files: nextFiles, request: nextRequest});
if (this._busy) return;
this._busy = true;
const {peerId, files} = this._filesQueue.shift();
this._displayFiles(peerId, files);
const {peerId, files, request} = this._filesQueue.shift();
this._displayFiles(peerId, files, request);
}
_dequeueFile() {
@ -525,23 +525,20 @@ class ReceiveFileDialog extends ReceiveDialog {
});
}
async _displayFiles(peerId, files) {
async _displayFiles(peerId, files, request) {
if (this.continueCallback) this.$shareOrDownloadBtn.removeEventListener("click", this.continueCallback);
let url;
let title;
let filenameDownload;
let combinedSize = 0
let descriptor = "Image";
for (let i=0; i<files.length; i++) {
combinedSize += files[i].size;
if (files[i].type.split('/')[0] !== "image") descriptor = "File";
}
let descriptor = request.imagesOnly ? "Image" : "File";
let size = this._formatFileSize(combinedSize);
let size = this._formatFileSize(request.totalSize);
let description = files[0].name;
let shareInsteadOfDownload = (window.iOS || window.android) && !!navigator.share && navigator.canShare({files});
if (files.length === 1) {
url = URL.createObjectURL(files[0])
title = `PairDrop - ${descriptor} Received`
@ -551,45 +548,47 @@ class ReceiveFileDialog extends ReceiveDialog {
description += ` and ${files.length-1} other ${descriptor.toLowerCase()}`;
if(files.length>2) description += "s";
let bytesCompleted = 0;
zipper.createNewZipWriter();
for (let i=0; i<files.length; i++) {
await zipper.addFile(files[i], {
onprogress: (progress) => {
Events.fire('set-progress', {
peerId: peerId,
progress: (bytesCompleted + progress) / combinedSize,
status: 'process'
})
}
});
bytesCompleted += files[i].size;
}
url = await zipper.getBlobURL();
if(!shareInsteadOfDownload) {
let bytesCompleted = 0;
zipper.createNewZipWriter();
for (let i=0; i<files.length; i++) {
await zipper.addFile(files[i], {
onprogress: (progress) => {
Events.fire('set-progress', {
peerId: peerId,
progress: (bytesCompleted + progress) / request.totalSize,
status: 'process'
})
}
});
bytesCompleted += files[i].size;
}
url = await zipper.getBlobURL();
let now = new Date(Date.now());
let year = now.getFullYear().toString();
let month = (now.getMonth()+1).toString();
month = month.length < 2 ? "0" + month : month;
let date = now.getDate().toString();
date = date.length < 2 ? "0" + date : date;
let hours = now.getHours().toString();
hours = hours.length < 2 ? "0" + hours : hours;
let minutes = now.getMinutes().toString();
minutes = minutes.length < 2 ? "0" + minutes : minutes;
filenameDownload = `PairDrop_files_${year+month+date}_${hours+minutes}.zip`;
let now = new Date(Date.now());
let year = now.getFullYear().toString();
let month = (now.getMonth()+1).toString();
month = month.length < 2 ? "0" + month : month;
let date = now.getDate().toString();
date = date.length < 2 ? "0" + date : date;
let hours = now.getHours().toString();
hours = hours.length < 2 ? "0" + hours : hours;
let minutes = now.getMinutes().toString();
minutes = minutes.length < 2 ? "0" + minutes : minutes;
filenameDownload = `PairDrop_files_${year+month+date}_${hours+minutes}.zip`;
}
}
this.$receiveTitleNode.textContent = title;
this.$fileDescriptionNode.textContent = description;
this.$fileSizeNode.textContent = size;
if ((window.iOS || window.android) && !!navigator.share && navigator.canShare({files})) {
if (shareInsteadOfDownload) {
this.$shareOrDownloadBtn.innerText = "Share";
this.continueCallback = async _ => {
navigator.share({
files: files
}).catch(err => console.error(err));
files: files
}).catch(err => console.error(err));
}
this.$shareOrDownloadBtn.addEventListener("click", this.continueCallback);
} else {
@ -602,18 +601,14 @@ class ReceiveFileDialog extends ReceiveDialog {
document.title = `PairDrop - ${files.length} Files received`;
document.changeFavicon("images/favicon-96x96-notification.png");
this.show();
Events.fire('set-progress', {
peerId: peerId,
progress: 1,
status: 'process'
})
Events.fire('set-progress', {peerId: peerId, progress: 1, status: 'process'})
this.$shareOrDownloadBtn.click();
}).catch(r => console.error(r));
}
hide() {
this.$shareOrDownloadBtn.href = '';
this.$shareOrDownloadBtn.download = '';
this.$shareOrDownloadBtn.removeAttribute('href');
this.$shareOrDownloadBtn.removeAttribute('download');
this.$previewBox.innerHTML = '';
super.hide();
this._dequeueFile();
@ -648,16 +643,9 @@ class ReceiveRequestDialog extends ReceiveDialog {
_onRequestFileTransfer(request, peerId) {
this.correspondingPeerId = peerId;
this.requestedHeader = request.header;
const peer = $(peerId);
let imagesOnly = true;
for(let i=0; i<request.header.length; i++) {
if (request.header[i].mime.split('/')[0] !== 'image') {
imagesOnly = false;
break;
}
}
this.$requestingPeerDisplayNameNode.innerText = peer.ui._displayName();
const fileName = request.header[0].name;
const fileNameSplit = fileName.split('.');
@ -667,14 +655,14 @@ class ReceiveRequestDialog extends ReceiveDialog {
if (request.header.length >= 2) {
let fileOtherText = ` and ${request.header.length - 1} other `;
fileOtherText += imagesOnly ? 'image' : 'file';
fileOtherText += request.imagesOnly ? 'image' : 'file';
if (request.header.length > 2) fileOtherText += "s";
this.$fileOtherNode.innerText = fileOtherText;
}
this.$fileSizeNode.innerText = this._formatFileSize(request.size);
this.$fileSizeNode.innerText = this._formatFileSize(request.totalSize);
if (request.thumbnailDataUrl) {
if (request.thumbnailDataUrl?.substring(0, 22) === "data:image/jpeg;base64") {
let element = document.createElement('img');
element.src = request.thumbnailDataUrl;
element.classList.add('element-preview');
@ -690,7 +678,6 @@ class ReceiveRequestDialog extends ReceiveDialog {
_respondToFileTransferRequest(accepted) {
Events.fire('respond-to-files-transfer-request', {
to: this.correspondingPeerId,
header: this.requestedHeader,
accepted: accepted
})
if (accepted) {
@ -1114,7 +1101,7 @@ class Toast extends Dialog {
if (this.hideTimeout) clearTimeout(this.hideTimeout);
this.$el.textContent = message;
this.show();
this.hideTimeout = setTimeout(_ => this.hide(), 3000);
this.hideTimeout = setTimeout(_ => this.hide(), 5000);
}
}