exports.autoOrientJPEG = async attachment => {
if (!MIME.isJPEG(attachment.contentType)) {
return attachment;
}
const dataBlob = await arrayBufferToBlob(
attachment.data,
attachment.contentType
);
const newDataBlob = await dataURLToBlob(await autoOrientImage(dataBlob));
const newDataArrayBuffer = await blobToArrayBuffer(newDataBlob);
// IMPORTANT: We overwrite the existing `data` `ArrayBuffer` losing the original
// image data. Ideally, we’d preserve the original image data for users who want to
// retain it but due to reports of data loss, we don’t want to overburden IndexedDB
// by potentially doubling stored image data.
// See: https://github.com/signalapp/Signal-Desktop/issues/1589
const newAttachment = Object.assign({}, attachment, {
data: newDataArrayBuffer,
size: newDataArrayBuffer.byteLength,
});
// `digest` is no longer valid for auto-oriented image data, so we discard it:
delete newAttachment.digest;
return newAttachment;
};
}, (err, body, res) => {
if (err) throw err;
const typeOfFile = fileType(new Uint8Array(res));
blobUtil.arrayBufferToBlob(res, typeOfFile.mime)
.then(blobUtil.createObjectURL)
.then(objectURL => {
dispatch({
type: ActionTypes.SET_BLOB_URL,
name: file.name,
blobURL: objectURL
});
});
});