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Merge pull request #412 from mozilla/i151 

throw key errors before download begins
This commit is contained in:
Danny Coates 2017-08-03 10:35:50 -07:00 committed by GitHub
parent 5c793dcde8 e36f685bd2
commit 434f8b56cc
1 changed files with 41 additions and 37 deletions
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78
frontend/src/fileReceiver.js
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@ -7,42 +7,8 @@ class FileReceiver extends EventEmitter {
} }
download() { download() {
return Promise.all([ return window.crypto.subtle
new Promise((resolve, reject) => { .importKey(
const xhr = new XMLHttpRequest();
xhr.onprogress = event => {
if (event.lengthComputable && event.target.status !== 404) {
this.emit('progress', [event.loaded, event.total]);
}
};
xhr.onload = function(event) {
if (xhr.status === 404) {
reject(new Error('notfound'));
return;
}
const blob = new Blob([this.response]);
const fileReader = new FileReader();
fileReader.onload = function() {
const meta = JSON.parse(xhr.getResponseHeader('X-File-Metadata'));
resolve({
data: this.result,
aad: meta.aad,
filename: meta.filename,
iv: meta.id
});
};
fileReader.readAsArrayBuffer(blob);
};
xhr.open('get', '/assets' + location.pathname.slice(0, -1), true);
xhr.responseType = 'blob';
xhr.send();
}),
window.crypto.subtle.importKey(
'jwk', 'jwk',
{ {
kty: 'oct', kty: 'oct',
@ -56,7 +22,45 @@ class FileReceiver extends EventEmitter {
true, true,
['encrypt', 'decrypt'] ['encrypt', 'decrypt']
) )
]) .then(key => {
return new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest();
xhr.onprogress = event => {
if (event.lengthComputable && event.target.status !== 404) {
this.emit('progress', [event.loaded, event.total]);
}
};
xhr.onload = function(event) {
if (xhr.status === 404) {
reject(new Error('notfound'));
return;
}
const blob = new Blob([this.response]);
const fileReader = new FileReader();
fileReader.onload = function() {
const meta = JSON.parse(xhr.getResponseHeader('X-File-Metadata'));
resolve([
{
data: this.result,
aad: meta.aad,
filename: meta.filename,
iv: meta.id
},
key
]);
};
fileReader.readAsArrayBuffer(blob);
};
xhr.open('get', '/assets' + location.pathname.slice(0, -1), true);
xhr.responseType = 'blob';
xhr.send();
});
})
.then(([fdata, key]) => { .then(([fdata, key]) => {
this.emit('decrypting', true); this.emit('decrypting', true);
return Promise.all([ return Promise.all([