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separated file into upload and download files, changed single quotes to double quotes, added progress indicator

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This commit is contained in:
Abhinav Adduri 2017-05-31 11:19:59 -07:00
parent aad54b34b9
commit c25c97fbaa
6 changed files with 212 additions and 177 deletions
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40
app.js
View file

@ -1,40 +1,40 @@
const express = require('express') const express = require("express")
var busboy = require('connect-busboy'); //middleware for form/file upload var busboy = require("connect-busboy"); //middleware for form/file upload
var path = require('path'); //used for file path var path = require("path"); //used for file path
var fs = require('fs-extra'); //File System - for file manipulation var fs = require("fs-extra"); //File System - for file manipulation
const app = express() const app = express()
var redis = require("redis"), var redis = require("redis"),
client = redis.createClient(); client = redis.createClient();
client.on('error', function(err) { client.on("error", function(err) {
console.log(err); console.log(err);
}) })
app.use(busboy()); app.use(busboy());
app.use(express.static(path.join(__dirname, 'public'))); app.use(express.static(path.join(__dirname, "public")));
app.get('/', function (req, res) { app.get("/", function (req, res) {
res.send('Hello World!') res.send("Hello World!")
}) })
app.get('/download/:id', function(req, res) { app.get("/download/:id", function(req, res) {
res.sendFile(path.join(__dirname + '/public/download.html')); res.sendFile(path.join(__dirname + "/public/download.html"));
}); });
app.get('/assets/download/:id', function(req, res) { app.get("/assets/download/:id", function(req, res) {
let id = req.params.id; let id = req.params.id;
client.hget(id, "filename", function(err, reply) { // maybe some expiration logic too client.hget(id, "filename", function(err, reply) { // maybe some expiration logic too
if (!reply) { if (!reply) {
res.sendStatus(404); res.sendStatus(404);
} else { } else {
res.setHeader('Content-Disposition', 'attachment; filename=' + reply); res.setHeader("Content-Disposition", "attachment; filename=" + reply);
res.setHeader('Content-Type', 'application/octet-stream'); res.setHeader("Content-Type", "application/octet-stream");
res.download(__dirname + '/static/' + id, reply, function(err) { res.download(__dirname + "/static/" + id, reply, function(err) {
if (!err) { if (!err) {
client.del(id); client.del(id);
fs.unlinkSync(__dirname + '/static/' + id); fs.unlinkSync(__dirname + "/static/" + id);
} }
}); });
} }
@ -42,18 +42,18 @@ app.get('/assets/download/:id', function(req, res) {
}); });
app.route('/upload/:id') app.route("/upload/:id")
.post(function (req, res, next) { .post(function (req, res, next) {
var fstream; var fstream;
req.pipe(req.busboy); req.pipe(req.busboy);
req.busboy.on('file', function (fieldname, file, filename) { req.busboy.on("file", function (fieldname, file, filename) {
console.log("Uploading: " + filename); console.log("Uploading: " + filename);
//Path where image will be uploaded //Path where image will be uploaded
fstream = fs.createWriteStream(__dirname + '/static/' + req.params.id); fstream = fs.createWriteStream(__dirname + "/static/" + req.params.id);
file.pipe(fstream); file.pipe(fstream);
fstream.on('close', function () { fstream.on("close", function () {
let id = req.params.id; let id = req.params.id;
client.hset(id, "filename", filename, redis.print); client.hset(id, "filename", filename, redis.print);
client.hset(id, "expiration", 0, redis.print); client.hset(id, "expiration", 0, redis.print);
@ -67,6 +67,6 @@ app.route('/upload/:id')
app.listen(3000, function () { app.listen(3000, function () {
console.log('Portal app listening on port 3000!') console.log("Portal app listening on port 3000!")
}) })

5
public/download.html
View file

@ -2,11 +2,12 @@
<html> <html>
<head> <head>
<title>Download your file</title> <title>Download your file</title>
<script type="text/javascript" src="/file.js"></script> <script type="text/javascript" src="/download.js"></script>
</head> </head>
<body> <body>
<button onclick="download()">DOWNLOAD</button> <button onclick="download()">DOWNLOAD</button>
<p id="downloadProgress"></p>
</body> </body>
</html> </html>

96
public/download.js Normal file
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@ -0,0 +1,96 @@
function download() {
var xhr = new XMLHttpRequest();
xhr.open("get", "/assets" + location.pathname.slice(0, -1), true);
xhr.responseType = "blob";
xhr.addEventListener("progress", updateProgress);
xhr.onload = function(e) {
if (this.status == 200) {
let self = this;
var blob = new Blob([this.response]);
var arrayBuffer;
var fileReader = new FileReader();
fileReader.onload = function() {
arrayBuffer = this.result;
var array = new Uint8Array(arrayBuffer);
salt = strToIv(location.pathname.slice(10, -1));
window.crypto.subtle.importKey(
"jwk",
{
kty: "oct",
k: location.hash.slice(1),
alg: "A128CBC",
ext: true,
},
{
name: "AES-CBC",
},
true,
["encrypt", "decrypt"])
.then(function(key){
window.crypto.subtle.decrypt(
{
name: "AES-CBC",
iv: salt,
},
key,
array)
.then(function(decrypted){
var dataView = new DataView(decrypted);
var blob = new Blob([dataView]);
var downloadUrl = URL.createObjectURL(blob);
var a = document.createElement("a");
a.href = downloadUrl;
a.download = xhr.getResponseHeader("Content-Disposition").match(/filename="(.+)"/)[1];
console.log(xhr.getResponseHeader("Content-Disposition"));
document.body.appendChild(a);
a.click();
})
.catch(function(err){
alert("This link is either invalid or has expired.");
console.error(err);
});
})
.catch(function(err){
console.error(err);
});
};
fileReader.readAsArrayBuffer(blob);
} else {
alert("Unable to download excel.")
}
};
xhr.send();
}
function ivToStr(iv) {
let hexStr = "";
for (var i in iv) {
if (iv[i] < 16) {
hexStr += "0" + iv[i].toString(16);
} else {
hexStr += iv[i].toString(16);
}
}
window.hexStr = hexStr;
return hexStr;
}
function strToIv(str) {
var iv = new Uint8Array(16);
for (var i = 0; i < str.length; i += 2) {
iv[i/2] = parseInt((str.charAt(i) + str.charAt(i + 1)), 16);
}
return iv;
}
function updateProgress(e) {
if (e.lengthComputable) {
var percentComplete = Math.floor((e.loaded / e.total) * 100);
document.getElementById("downloadProgress").innerHTML = "Progress: " + percentComplete + "%";
}
}

149
public/file.js
View file

@ -1,149 +0,0 @@
function download() {
var xhr = new XMLHttpRequest();
xhr.open('get', '/assets' + location.pathname.slice(0, -1), true);
xhr.responseType = 'blob';
xhr.onload = function(e) {
if (this.status == 200) {
let self = this;
var blob = new Blob([this.response]);
var arrayBuffer;
var fileReader = new FileReader();
fileReader.onload = function() {
arrayBuffer = this.result;
var array = new Uint8Array(arrayBuffer);
salt = strToIv(location.pathname.slice(10, -1));
window.crypto.subtle.importKey(
"jwk",
{
kty: "oct",
k: location.hash.slice(1),
alg: "A128CBC",
ext: true,
},
{
name: "AES-CBC",
},
true,
["encrypt", "decrypt"]
)
.then(function(key){
window.crypto.subtle.decrypt(
{
name: "AES-CBC",
iv: salt,
},
key,
array
)
.then(function(decrypted){
var dataView = new DataView(decrypted);
var blob = new Blob([dataView]);
var downloadUrl = URL.createObjectURL(blob);
var a = document.createElement("a");
a.href = downloadUrl;
a.download = xhr.getResponseHeader('Content-Disposition').match(/filename="(.+)"/)[1];
console.log(xhr.getResponseHeader('Content-Disposition'));
document.body.appendChild(a);
a.click();
})
.catch(function(err){
alert('This link is either invalid or has expired.');
console.error(err);
});
})
.catch(function(err){
console.error(err);
});
};
fileReader.readAsArrayBuffer(blob);
} else {
alert('Unable to download excel.')
}
};
xhr.send();
}
function onChange(event) {
var file = event.target.files[0];
var reader = new FileReader();
reader.onload = function(event) {
let self = this;
window.crypto.subtle.generateKey({
name: "AES-CBC",
length: 128
},
true,
["encrypt", "decrypt"])
.then(function(key){
var arrayBuffer = self.result;
var array = new Uint8Array(arrayBuffer);
var random_iv = window.crypto.getRandomValues(new Uint8Array(16));
window.crypto.subtle.encrypt({
name: "AES-CBC",
iv: random_iv },
key,
array)
.then(function(encrypted){
console.log('Send this salt to a friend: [' + random_iv.toString() + ']');
var dataView = new DataView(encrypted);
var blob = new Blob([dataView], { type: file.type });
var fd = new FormData();
fd.append('fname', file.name);
fd.append('data', blob, file.name);
var xhr = new XMLHttpRequest();
var hex = ivToStr(random_iv);
xhr.open('post', '/upload/' + hex, true);
xhr.onreadystatechange = function() {
if (xhr.readyState == XMLHttpRequest.DONE) {
window.crypto.subtle.exportKey("jwk", key).then(function(keydata){
console.log('Go to this URL: http://localhost:3000/download/' + hex + '/#' + keydata.k);
alert('Go to this URL: http://localhost:3000/download/' + hex + '/#' + keydata.k);
})
}
};
xhr.send(fd);
})
.catch(function(err){
console.error(err);
});
})
.catch(function(err){
console.error(err);
});
};
reader.readAsArrayBuffer(file);
}
function ivToStr(iv) {
let hexStr = '';
for (var i in iv) {
if (iv[i] < 16) {
hexStr += '0' + iv[i].toString(16);
} else {
hexStr += iv[i].toString(16);
}
}
window.hexStr = hexStr;
return hexStr;
}
function strToIv(str) {
var iv = new Uint8Array(16);
for (var i = 0; i < str.length; i += 2) {
iv[i/2] = parseInt((str.charAt(i) + str.charAt(i + 1)), 16);
}
return iv;
}

11
public/index.html
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@ -2,17 +2,16 @@
<html> <html>
<head> <head>
<title>Firefox Fileshare</title> <title>Firefox Fileshare</title>
<script src="file.js"></script> <script src="upload.js"></script>
</head> </head>
<body> <body>
<form method='post' action='upload' enctype="multipart/form-data"> <form method="post" action="upload" enctype="multipart/form-data">
<input type='file' onchange="onChange(event)" name='fileUploaded' /> <input type="file" onchange="onChange(event)" name="fileUploaded" />
</form> </form>
<p id="downloadProgress"></p>
</body> </body>
</html> </html>

88
public/upload.js Normal file
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@ -0,0 +1,88 @@
function onChange(event) {
var file = event.target.files[0];
var reader = new FileReader();
reader.onload = function(event) {
let self = this;
window.crypto.subtle.generateKey({
name: "AES-CBC",
length: 128
},
true,
["encrypt", "decrypt"])
.then(function(key){
var arrayBuffer = self.result;
var array = new Uint8Array(arrayBuffer);
var random_iv = window.crypto.getRandomValues(new Uint8Array(16));
window.crypto.subtle.encrypt({
name: "AES-CBC",
iv: random_iv },
key,
array)
.then(function(encrypted){
var dataView = new DataView(encrypted);
var blob = new Blob([dataView], { type: file.type });
var fd = new FormData();
fd.append("fname", file.name);
fd.append("data", blob, file.name);
var xhr = new XMLHttpRequest();
var hex = ivToStr(random_iv);
xhr.open("post", "/upload/" + hex, true);
xhr.addEventListener("progress", updateProgress);
xhr.upload.addEventListener("progress", updateProgress);
xhr.onreadystatechange = function() {
if (xhr.readyState == XMLHttpRequest.DONE) {
window.crypto.subtle.exportKey("jwk", key).then(function(keydata) {
console.log("Share this link with a friend: http://localhost:3000/download/" + hex + "/#" + keydata.k);
alert("Share this link with a friend: http://localhost:3000/download/" + hex + "/#" + keydata.k);
})
}
};
xhr.send(fd);
})
.catch(function(err){
console.error(err);
});
})
.catch(function(err){
console.error(err);
});
};
reader.readAsArrayBuffer(file);
}
function ivToStr(iv) {
let hexStr = "";
for (var i in iv) {
if (iv[i] < 16) {
hexStr += "0" + iv[i].toString(16);
} else {
hexStr += iv[i].toString(16);
}
}
window.hexStr = hexStr;
return hexStr;
}
function strToIv(str) {
var iv = new Uint8Array(16);
for (var i = 0; i < str.length; i += 2) {
iv[i/2] = parseInt((str.charAt(i) + str.charAt(i + 1)), 16);
}
return iv;
}
function updateProgress(e) {
if (e.lengthComputable) {
var percentComplete = Math.floor((e.loaded / e.total) * 100);
document.getElementById("downloadProgress").innerHTML = "Progress: " + percentComplete + "%";
}
}