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AssetService.js
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AssetService.js
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/*
* Wire
* Copyright (C) 2018 Wire Swiss GmbH
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
*/
import {Asset} from '@wireapp/protocol-messaging';
import {getLogger} from 'utils/Logger';
import {loadImage, loadFileBuffer, arrayToMd5Base64} from 'utils/util';
import {AssetRetentionPolicy} from '../assets/AssetRetentionPolicy';
import {encryptAesAsset} from './AssetCrypto';
// AssetService for all asset handling and the calls to the backend REST API.
export class AssetService {
/**
* Construct a new Asset Service.
* @param {BackendClient} backendClient - Client for the API calls
*/
constructor(backendClient) {
this.backendClient = backendClient;
this.logger = getLogger('AssetService');
}
/**
* Update the user profile image by first making it usable, transforming it and then uploading the asset pair.
* @param {File|Blob} image - Profile image
* @returns {Promise} Resolves when profile image has been uploaded
*/
uploadProfileImage(image) {
return Promise.all([this._compressProfileImage(image), this._compressImage(image)])
.then(([{compressedBytes: previewImageBytes}, {compressedBytes: mediumImageBytes}]) => {
const assetUploadOptions = {public: true, retention: AssetRetentionPolicy.ETERNAL};
return Promise.all([
this.postAsset(previewImageBytes, assetUploadOptions),
this.postAsset(mediumImageBytes, assetUploadOptions),
]);
})
.then(([previewCredentials, mediumCredentials]) => {
return {mediumImageKey: mediumCredentials.key, previewImageKey: previewCredentials.key};
});
}
/**
* Upload arbitrary binary data using the new asset api v3.
* The data is AES encrypted before uploading.
*
* @param {ArrayBuffer} bytes - Asset binary data
* @param {Object} options - Asset upload options
* @param {boolean} options.public - Flag whether asset is public
* @param {AssetRetentionPolicy} options.retention - Retention duration policy for asset
* @param {Function} [xhrAccessorFunction] - Function will get a reference to the underlying XMLHTTPRequest
* @returns {Promise<Asset>} Resolves when asset has been uploaded
*/
_uploadAsset(bytes, options, xhrAccessorFunction) {
return encryptAesAsset(bytes).then(({cipherText, keyBytes, sha256}) => {
return this.postAsset(new Uint8Array(cipherText), options, xhrAccessorFunction).then(({key, token}) => {
const assetRemoteData = new Asset.RemoteData({
assetId: key,
assetToken: token,
otrKey: new Uint8Array(keyBytes),
sha256: new Uint8Array(sha256),
});
const protoAsset = new Asset({
[z.cryptography.PROTO_MESSAGE_TYPE.ASSET_UPLOADED]: assetRemoteData,
[z.cryptography.PROTO_MESSAGE_TYPE.EXPECTS_READ_CONFIRMATION]: options.expectsReadConfirmation || false,
});
return protoAsset;
});
});
}
/**
* Upload file using the new asset api v3. Promise will resolve with an Asset instance.
* In case of an successful upload the uploaded property is set.
*
* @param {Blob|File} file - File asset to be uploaded
* @param {Object} options - Asset upload options
* @param {boolean} options.public - Flag whether asset is public
* @param {AssetRetentionPolicy} options.retention - Retention duration policy for asset
* @param {boolean} options.expectsReadConfirmation - Whether the sender expects a read confirmation
* @param {Function} xhrAccessorFunction - Function will get a reference to the underlying XMLHTTPRequest
* @returns {Promise} Resolves when asset has been uploaded
*/
uploadAsset(file, options, xhrAccessorFunction) {
return loadFileBuffer(file).then(buffer => this._uploadAsset(buffer, options, xhrAccessorFunction));
}
/**
* Upload image using the new asset api v3. Promise will resolve with an Asset instance.
* In case of an successful upload the uploaded property is set.
*
* @param {Blob|File} image - Image asset to be uploaded
* @param {Object} options - Asset upload options
* @param {boolean} options.public - Flag whether asset is public
* @param {AssetRetentionPolicy} options.retention - Retention duration policy for asset
* @param {boolean} options.expectsReadConfirmation - Whether the sender expects a read confirmation
* @param {Function} [xhrAccessorFunction] - Function will get a reference to the underlying XMLHTTPRequest
* @returns {Promise} Resolves when asset has been uploaded
*/
uploadImageAsset(image, options, xhrAccessorFunction) {
return this._compressImage(image).then(({compressedBytes, compressedImage}) => {
return this._uploadAsset(compressedBytes, options, xhrAccessorFunction).then(protoAsset => {
const assetImageMetadata = new Asset.ImageMetaData({
height: compressedImage.height,
width: compressedImage.width,
});
const assetOriginal = new Asset.Original({
image: assetImageMetadata,
mimeType: image.type,
size: compressedBytes.length,
});
protoAsset[z.cryptography.PROTO_MESSAGE_TYPE.ASSET_ORIGINAL] = assetOriginal;
return protoAsset;
});
});
}
/**
* Generates the URL an asset can be downloaded from.
*
* @deprecated
* @param {string} assetId - ID of asset
* @param {string} conversationId - Conversation ID
* @param {boolean} forceCaching - Cache asset in ServiceWorker
* @returns {Promise} Resolves with URL of v1 asset
*/
generateAssetUrl(assetId, conversationId, forceCaching) {
return Promise.resolve().then(() => {
z.util.ValidationUtil.asset.legacy(assetId, conversationId);
const url = this.backendClient.createUrl(`/assets/${assetId}`);
const cachingParam = forceCaching ? '&forceCaching=true' : '';
const conversationIdParam = `&conv_id=${window.encodeURIComponent(conversationId)}`;
return `${url}?access_token=${this.backendClient.accessToken}${conversationIdParam}${cachingParam}`;
});
}
/**
* Generates the URL for asset api v2.
*
* @deprecated
* @param {string} assetId - ID of asset
* @param {string} conversationId - Conversation ID
* @param {boolean} forceCaching - Cache asset in ServiceWorker
* @returns {Promise} Resolves with URL of v2 asset
*/
generateAssetUrlV2(assetId, conversationId, forceCaching) {
return Promise.resolve().then(() => {
z.util.ValidationUtil.asset.legacy(assetId, conversationId);
const url = this.backendClient.createUrl(`/conversations/${conversationId}/otr/assets/${assetId}`);
const cachingParam = forceCaching ? '&forceCaching=true' : '';
return `${url}?access_token=${this.backendClient.accessToken}${cachingParam}`;
});
}
/**
* Generates the URL for asset api v3.
*
* @param {string} assetKey - ID of asset
* @param {string} assetToken - Asset token
* @param {boolean} forceCaching - Cache asset in ServiceWorker
* @returns {Promise} Resolves with URL of v3 asset
*/
generateAssetUrlV3(assetKey, assetToken, forceCaching) {
return Promise.resolve().then(() => {
z.util.ValidationUtil.asset.v3(assetKey, assetToken);
const url = `${this.backendClient.createUrl(`/assets/v3/${assetKey}`)}`;
const assetTokenParam = assetToken ? `&asset_token=${window.encodeURIComponent(assetToken)}` : '';
const cachingParam = forceCaching ? '&forceCaching=true' : '';
return `${url}?access_token=${this.backendClient.accessToken}${assetTokenParam}${cachingParam}`;
});
}
getAssetRetention(userEntity, conversationEntity) {
const isTeamMember = userEntity.inTeam();
const isTeamConversation = conversationEntity.inTeam();
const isTeamUserInConversation = conversationEntity
.participating_user_ets()
.some(conversationParticipant => conversationParticipant.inTeam());
const isEternal = isTeamMember || isTeamConversation || isTeamUserInConversation;
return isEternal ? AssetRetentionPolicy.ETERNAL : AssetRetentionPolicy.PERSISTENT;
}
/**
* Post assets.
*
* @param {Uint8Array} assetData - Asset data
* @param {Object} options - Asset metadata
* @param {boolean} options.public - Flag whether asset is public
* @param {AssetRetentionPolicy} options.retention - Retention duration policy for asset
* @param {Function} [xhrAccessorFunction] - Function will get a reference to the underlying XMLHTTPRequest
* @returns {Promise} Resolves when asset has been uploaded
*/
postAsset(assetData, options, xhrAccessorFunction) {
const BOUNDARY = 'frontier';
options = Object.assign(
{
public: false,
retention: AssetRetentionPolicy.PERSISTENT,
},
options
);
options = JSON.stringify(options);
const body = [
`--${BOUNDARY}`,
'Content-Type: application/json; charset=utf-8',
`Content-length: ${options.length}`,
'',
options,
`--${BOUNDARY}`,
'Content-Type: application/octet-stream',
`Content-length: ${assetData.length}`,
`Content-MD5: ${arrayToMd5Base64(assetData)}`,
'',
'',
].join('\r\n');
const footer = `\r\n--${BOUNDARY}--\r\n`;
const xhr = new XMLHttpRequest();
if (typeof xhrAccessorFunction === 'function') {
xhrAccessorFunction(xhr);
}
xhr.open('POST', this.backendClient.createUrl('/assets/v3'));
xhr.setRequestHeader('Content-Type', `multipart/mixed; boundary=${BOUNDARY}`);
xhr.setRequestHeader('Authorization', `${this.backendClient.accessTokenType} ${this.backendClient.accessToken}`);
xhr.send(new Blob([body, assetData, footer]));
return new Promise((resolve, reject) => {
xhr.onload = function(event) {
return this.status === 201 ? resolve(JSON.parse(this.response)) : reject(event);
};
xhr.onerror = reject;
});
}
/**
* Compress image.
* @param {File|Blob} image - Image to be compressed in ServiceWorker
* @returns {Promise} Resolves with the compressed imaged
*/
_compressImage(image) {
return this._compressImageWithWorker('worker/image-worker.js', image, () => image.type === 'image/gif');
}
/**
* Compress profile image.
* @param {File|Blob} image - Profile image to be compressed in ServiceWorker
* @returns {Promise} Resolves with the compressed profile imaged
*/
_compressProfileImage(image) {
return this._compressImageWithWorker('worker/profile-image-worker.js', image);
}
/**
* Compress image using given worker.
* @param {string} worker - Path to worker file
* @param {File|Blob} image - Image to be compressed in ServiceWorker
* @param {Function} filter - Optional filter to be applied
* @returns {Promise} Resolves with the compressed image
*/
_compressImageWithWorker(worker, image, filter) {
return loadFileBuffer(image)
.then(buffer => {
if (typeof filter === 'function' ? filter() : undefined) {
return new Uint8Array(buffer);
}
return new z.util.Worker(worker).post(buffer);
})
.then(compressedBytes => {
return loadImage(new Blob([compressedBytes], {type: image.type})).then(compressedImage => ({
compressedBytes,
compressedImage,
}));
});
}
}