separated file into upload and download files, changed single quotes to double quotes, added progress indicator
This commit is contained in:
Abhinav Adduri
parent
aad54b34b9
commit
c25c97fbaa
6 changed files with 212 additions and 177 deletions
40
app.js
40
app.js
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@ -1,40 +1,40 @@
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const express = require('express')
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var busboy = require('connect-busboy'); //middleware for form/file upload
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var path = require('path'); //used for file path
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var fs = require('fs-extra'); //File System - for file manipulation
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const express = require("express")
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var busboy = require("connect-busboy"); //middleware for form/file upload
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var path = require("path"); //used for file path
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var fs = require("fs-extra"); //File System - for file manipulation
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const app = express()
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var redis = require("redis"),
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client = redis.createClient();
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client.on('error', function(err) {
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client.on("error", function(err) {
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console.log(err);
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})
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app.use(busboy());
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app.use(express.static(path.join(__dirname, 'public')));
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app.use(express.static(path.join(__dirname, "public")));
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app.get('/', function (req, res) {
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res.send('Hello World!')
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app.get("/", function (req, res) {
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res.send("Hello World!")
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})
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app.get('/download/:id', function(req, res) {
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res.sendFile(path.join(__dirname + '/public/download.html'));
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app.get("/download/:id", function(req, res) {
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res.sendFile(path.join(__dirname + "/public/download.html"));
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});
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app.get('/assets/download/:id', function(req, res) {
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app.get("/assets/download/:id", function(req, res) {
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let id = req.params.id;
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client.hget(id, "filename", function(err, reply) { // maybe some expiration logic too
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if (!reply) {
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res.sendStatus(404);
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} else {
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res.setHeader('Content-Disposition', 'attachment; filename=' + reply);
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res.setHeader('Content-Type', 'application/octet-stream');
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res.setHeader("Content-Disposition", "attachment; filename=" + reply);
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res.setHeader("Content-Type", "application/octet-stream");
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res.download(__dirname + '/static/' + id, reply, function(err) {
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res.download(__dirname + "/static/" + id, reply, function(err) {
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if (!err) {
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client.del(id);
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fs.unlinkSync(__dirname + '/static/' + id);
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fs.unlinkSync(__dirname + "/static/" + id);
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}
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});
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}
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@ -42,18 +42,18 @@ app.get('/assets/download/:id', function(req, res) {
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});
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app.route('/upload/:id')
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app.route("/upload/:id")
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.post(function (req, res, next) {
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var fstream;
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req.pipe(req.busboy);
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req.busboy.on('file', function (fieldname, file, filename) {
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req.busboy.on("file", function (fieldname, file, filename) {
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console.log("Uploading: " + filename);
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//Path where image will be uploaded
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fstream = fs.createWriteStream(__dirname + '/static/' + req.params.id);
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fstream = fs.createWriteStream(__dirname + "/static/" + req.params.id);
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file.pipe(fstream);
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fstream.on('close', function () {
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fstream.on("close", function () {
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let id = req.params.id;
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client.hset(id, "filename", filename, redis.print);
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client.hset(id, "expiration", 0, redis.print);
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@ -67,6 +67,6 @@ app.route('/upload/:id')
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app.listen(3000, function () {
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console.log('Portal app listening on port 3000!')
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console.log("Portal app listening on port 3000!")
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})
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@ -2,11 +2,12 @@
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<html>
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<head>
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<title>Download your file</title>
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<script type="text/javascript" src="/file.js"></script>
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<script type="text/javascript" src="/download.js"></script>
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</head>
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<body>
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<button onclick="download()">DOWNLOAD</button>
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<p id="downloadProgress"></p>
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</body>
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</html>
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96
public/download.js
Normal file
96
public/download.js
Normal file
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@ -0,0 +1,96 @@
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function download() {
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var xhr = new XMLHttpRequest();
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xhr.open("get", "/assets" + location.pathname.slice(0, -1), true);
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xhr.responseType = "blob";
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xhr.addEventListener("progress", updateProgress);
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xhr.onload = function(e) {
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if (this.status == 200) {
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let self = this;
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var blob = new Blob([this.response]);
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var arrayBuffer;
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var fileReader = new FileReader();
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fileReader.onload = function() {
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arrayBuffer = this.result;
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var array = new Uint8Array(arrayBuffer);
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salt = strToIv(location.pathname.slice(10, -1));
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window.crypto.subtle.importKey(
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"jwk",
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{
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kty: "oct",
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k: location.hash.slice(1),
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alg: "A128CBC",
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ext: true,
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},
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{
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name: "AES-CBC",
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},
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true,
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["encrypt", "decrypt"])
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.then(function(key){
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window.crypto.subtle.decrypt(
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{
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name: "AES-CBC",
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iv: salt,
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},
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key,
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array)
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.then(function(decrypted){
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var dataView = new DataView(decrypted);
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var blob = new Blob([dataView]);
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var downloadUrl = URL.createObjectURL(blob);
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var a = document.createElement("a");
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a.href = downloadUrl;
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a.download = xhr.getResponseHeader("Content-Disposition").match(/filename="(.+)"/)[1];
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console.log(xhr.getResponseHeader("Content-Disposition"));
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document.body.appendChild(a);
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a.click();
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})
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.catch(function(err){
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alert("This link is either invalid or has expired.");
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console.error(err);
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});
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})
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.catch(function(err){
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console.error(err);
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});
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};
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fileReader.readAsArrayBuffer(blob);
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} else {
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alert("Unable to download excel.")
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}
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};
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xhr.send();
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}
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function ivToStr(iv) {
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let hexStr = "";
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for (var i in iv) {
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if (iv[i] < 16) {
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hexStr += "0" + iv[i].toString(16);
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} else {
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hexStr += iv[i].toString(16);
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}
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}
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window.hexStr = hexStr;
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return hexStr;
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}
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function strToIv(str) {
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var iv = new Uint8Array(16);
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for (var i = 0; i < str.length; i += 2) {
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iv[i/2] = parseInt((str.charAt(i) + str.charAt(i + 1)), 16);
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}
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return iv;
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}
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function updateProgress(e) {
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if (e.lengthComputable) {
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var percentComplete = Math.floor((e.loaded / e.total) * 100);
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document.getElementById("downloadProgress").innerHTML = "Progress: " + percentComplete + "%";
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}
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}
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149
public/file.js
149
public/file.js
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@ -1,149 +0,0 @@
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function download() {
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var xhr = new XMLHttpRequest();
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xhr.open('get', '/assets' + location.pathname.slice(0, -1), true);
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xhr.responseType = 'blob';
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xhr.onload = function(e) {
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if (this.status == 200) {
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let self = this;
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var blob = new Blob([this.response]);
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var arrayBuffer;
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var fileReader = new FileReader();
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fileReader.onload = function() {
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arrayBuffer = this.result;
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var array = new Uint8Array(arrayBuffer);
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salt = strToIv(location.pathname.slice(10, -1));
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window.crypto.subtle.importKey(
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"jwk",
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{
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kty: "oct",
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k: location.hash.slice(1),
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alg: "A128CBC",
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ext: true,
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},
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{
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name: "AES-CBC",
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},
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true,
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["encrypt", "decrypt"]
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)
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.then(function(key){
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window.crypto.subtle.decrypt(
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{
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name: "AES-CBC",
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iv: salt,
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},
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key,
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array
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)
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.then(function(decrypted){
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var dataView = new DataView(decrypted);
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var blob = new Blob([dataView]);
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var downloadUrl = URL.createObjectURL(blob);
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var a = document.createElement("a");
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a.href = downloadUrl;
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a.download = xhr.getResponseHeader('Content-Disposition').match(/filename="(.+)"/)[1];
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console.log(xhr.getResponseHeader('Content-Disposition'));
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document.body.appendChild(a);
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a.click();
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})
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.catch(function(err){
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alert('This link is either invalid or has expired.');
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console.error(err);
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});
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})
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.catch(function(err){
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console.error(err);
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});
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};
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fileReader.readAsArrayBuffer(blob);
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} else {
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alert('Unable to download excel.')
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}
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};
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xhr.send();
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}
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function onChange(event) {
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var file = event.target.files[0];
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var reader = new FileReader();
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reader.onload = function(event) {
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let self = this;
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window.crypto.subtle.generateKey({
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name: "AES-CBC",
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length: 128
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},
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true,
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["encrypt", "decrypt"])
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.then(function(key){
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var arrayBuffer = self.result;
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var array = new Uint8Array(arrayBuffer);
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var random_iv = window.crypto.getRandomValues(new Uint8Array(16));
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window.crypto.subtle.encrypt({
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name: "AES-CBC",
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iv: random_iv },
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key,
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array)
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.then(function(encrypted){
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console.log('Send this salt to a friend: [' + random_iv.toString() + ']');
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var dataView = new DataView(encrypted);
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var blob = new Blob([dataView], { type: file.type });
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var fd = new FormData();
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fd.append('fname', file.name);
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fd.append('data', blob, file.name);
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var xhr = new XMLHttpRequest();
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var hex = ivToStr(random_iv);
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xhr.open('post', '/upload/' + hex, true);
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xhr.onreadystatechange = function() {
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if (xhr.readyState == XMLHttpRequest.DONE) {
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window.crypto.subtle.exportKey("jwk", key).then(function(keydata){
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console.log('Go to this URL: http://localhost:3000/download/' + hex + '/#' + keydata.k);
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alert('Go to this URL: http://localhost:3000/download/' + hex + '/#' + keydata.k);
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})
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}
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};
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xhr.send(fd);
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})
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.catch(function(err){
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console.error(err);
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});
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})
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.catch(function(err){
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console.error(err);
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});
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};
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reader.readAsArrayBuffer(file);
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}
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function ivToStr(iv) {
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let hexStr = '';
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for (var i in iv) {
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if (iv[i] < 16) {
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hexStr += '0' + iv[i].toString(16);
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} else {
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hexStr += iv[i].toString(16);
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}
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}
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window.hexStr = hexStr;
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return hexStr;
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}
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function strToIv(str) {
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var iv = new Uint8Array(16);
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for (var i = 0; i < str.length; i += 2) {
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iv[i/2] = parseInt((str.charAt(i) + str.charAt(i + 1)), 16);
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}
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return iv;
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}
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@ -2,17 +2,16 @@
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<html>
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<head>
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<title>Firefox Fileshare</title>
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<script src="file.js"></script>
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<script src="upload.js"></script>
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</head>
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<body>
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<form method='post' action='upload' enctype="multipart/form-data">
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<input type='file' onchange="onChange(event)" name='fileUploaded' />
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<form method="post" action="upload" enctype="multipart/form-data">
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<input type="file" onchange="onChange(event)" name="fileUploaded" />
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</form>
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<p id="downloadProgress"></p>
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</body>
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</html>
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88
public/upload.js
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88
public/upload.js
Normal file
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@ -0,0 +1,88 @@
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function onChange(event) {
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var file = event.target.files[0];
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var reader = new FileReader();
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reader.onload = function(event) {
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let self = this;
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window.crypto.subtle.generateKey({
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name: "AES-CBC",
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length: 128
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},
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true,
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["encrypt", "decrypt"])
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.then(function(key){
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var arrayBuffer = self.result;
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var array = new Uint8Array(arrayBuffer);
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var random_iv = window.crypto.getRandomValues(new Uint8Array(16));
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window.crypto.subtle.encrypt({
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name: "AES-CBC",
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iv: random_iv },
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key,
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array)
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.then(function(encrypted){
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var dataView = new DataView(encrypted);
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var blob = new Blob([dataView], { type: file.type });
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var fd = new FormData();
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fd.append("fname", file.name);
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fd.append("data", blob, file.name);
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var xhr = new XMLHttpRequest();
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var hex = ivToStr(random_iv);
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xhr.open("post", "/upload/" + hex, true);
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xhr.addEventListener("progress", updateProgress);
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xhr.upload.addEventListener("progress", updateProgress);
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xhr.onreadystatechange = function() {
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if (xhr.readyState == XMLHttpRequest.DONE) {
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window.crypto.subtle.exportKey("jwk", key).then(function(keydata) {
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console.log("Share this link with a friend: http://localhost:3000/download/" + hex + "/#" + keydata.k);
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alert("Share this link with a friend: http://localhost:3000/download/" + hex + "/#" + keydata.k);
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})
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}
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};
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xhr.send(fd);
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})
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.catch(function(err){
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console.error(err);
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});
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})
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.catch(function(err){
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console.error(err);
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});
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};
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reader.readAsArrayBuffer(file);
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}
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function ivToStr(iv) {
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let hexStr = "";
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for (var i in iv) {
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if (iv[i] < 16) {
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hexStr += "0" + iv[i].toString(16);
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} else {
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hexStr += iv[i].toString(16);
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}
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}
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window.hexStr = hexStr;
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return hexStr;
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}
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function strToIv(str) {
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var iv = new Uint8Array(16);
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for (var i = 0; i < str.length; i += 2) {
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iv[i/2] = parseInt((str.charAt(i) + str.charAt(i + 1)), 16);
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}
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return iv;
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}
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function updateProgress(e) {
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if (e.lengthComputable) {
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var percentComplete = Math.floor((e.loaded / e.total) * 100);
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document.getElementById("downloadProgress").innerHTML = "Progress: " + percentComplete + "%";
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}
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}
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