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This commit is contained in:
Mark Haines 2016-11-08 11:42:20 +00:00
parent dc679a8eca
commit 911f9e4e63
6 changed files with 63 additions and 68 deletions
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27
src/utils/DecryptFile.js
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@ -14,22 +14,19 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
'use struct';
// Pull in the encryption lib so that we can decrypt attachments.
var encrypt = require("browser-encrypt-attachment");
import encrypt from 'browser-encrypt-attachment';
// Pull in a fetch polyfill so we can download encrypted attachments.
require("isomorphic-fetch");
import 'isomorphic-fetch';
// Grab the client so that we can turn mxc:// URLs into https:// URLS.
var MatrixClientPeg = require('../MatrixClientPeg');
var q = require('q');
import MatrixClientPeg from '../MatrixClientPeg';
import q from 'q';
/**
* Read blob as a data:// URI.
* @return {Promise} A promise that resolves with the data:// URI.
*/
function readBlobAsDataUri(file) {
var deferred = q.defer();
var reader = new FileReader();
@ -44,13 +41,21 @@ function readBlobAsDataUri(file) {
}
/**
* Decrypt a file attached to a matrix event.
* @param file {Object} The json taken from the matrix event.
* This passed to [link]{@link https://github.com/matrix-org/browser-encrypt-attachments}
* as the encryption info object, so will also have the those keys in addition to
* the keys below.
* @param file.url {string} An mxc:// URL for the encrypted file.
* @param file.mimetype {string} The MIME-type of the plaintext file.
*/
export function decryptFile(file) {
var url = MatrixClientPeg.get().mxcUrlToHttp(file.url);
var self = this;
const url = MatrixClientPeg.get().mxcUrlToHttp(file.url);
// Download the encrypted file as an array buffer.
return fetch(url).then(function (response) {
return fetch(url).then(function(response) {
return response.arrayBuffer();
}).then(function (responseData) {
}).then(function(responseData) {
// Decrypt the array buffer using the information taken from
// the event content.
return encrypt.decryptAttachment(responseData, file);