hackpro-sdk
Version:
54 lines • 2.48 kB
JavaScript
;
/*
* Copyright 2018 balena.io
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
const zlib_1 = require("zlib");
const compressed_source_1 = require("./compressed-source");
const source_destination_1 = require("./source-destination");
const ISIZE_LENGTH = 4;
class GZipSource extends compressed_source_1.CompressedSource {
constructor() {
super(...arguments);
this.isSizeEstimated = true;
}
createTransform() {
return zlib_1.createGunzip();
}
getSize() {
return __awaiter(this, void 0, void 0, function* () {
if (yield this.source.canRead()) {
const sourceMetadata = yield this.source.getMetadata();
if (sourceMetadata.size !== undefined) {
const { buffer } = yield this.source.read(Buffer.allocUnsafe(ISIZE_LENGTH), 0, ISIZE_LENGTH, sourceMetadata.size - ISIZE_LENGTH);
return buffer.readUInt32LE(0);
}
}
});
}
}
exports.GZipSource = GZipSource;
GZipSource.mimetype = 'application/gzip';
source_destination_1.SourceDestination.register(GZipSource);
//# sourceMappingURL=gzip.js.map