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All rights reserved.\n// Licensed to the Readium Foundation under one or more contributor license agreements.\n// Use of this source code is governed by a BSD-style license\n// that can be found in the LICENSE file exposed on Github (readium) in the project repository.\n// ==LICENSE-END==\n\nimport * as debug_ from \"debug\";\nimport * as request from \"request\";\nimport * as unzipper from \"unzipper\";\n\nimport { isHTTP } from \"../http/UrlUtils\";\nimport { IStreamAndLength, IZip, Zip } from \"./zip\";\n\nconst debug = debug_(\"r2:utils#zip/zip3\");\n\n// eslint-disable-next-line @typescript-eslint/no-explicit-any\ninterface IStringKeyedObject { [key: string]: any; }\n\nexport class Zip3 extends Zip {\n\n public static async loadPromise(filePath: string): Promise<IZip> {\n if (isHTTP(filePath)) {\n return Zip3.loadPromiseHTTP(filePath);\n }\n\n return new Promise<IZip>(async (resolve, reject) => {\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n let zip: any;\n try {\n zip = await unzipper.Open.file(filePath);\n } catch (err) {\n debug(err);\n reject(err);\n return;\n }\n debug(zip);\n resolve(new Zip3(filePath, zip));\n });\n }\n\n private static async loadPromiseHTTP(filePath: string): Promise<IZip> {\n\n return new Promise<IZip>(async (resolve, reject) => {\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n let zip: any;\n try {\n zip = await unzipper.Open.url(request.get,\n {\n headers: {},\n method: \"GET\",\n uri: filePath,\n url: filePath,\n });\n } catch (err) {\n debug(err);\n reject(err);\n return;\n }\n debug(zip);\n resolve(new Zip3(filePath, zip));\n });\n }\n\n private entries: IStringKeyedObject;\n\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n private constructor(readonly filePath: string, readonly zip: any) {\n super();\n\n this.entries = {};\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n this.zip.files.forEach((file: any) => {\n this.entries[file.path] = file;\n });\n }\n\n public freeDestroy(): void {\n debug(\"freeDestroy: Zip3 -- \" + this.filePath);\n if (this.zip) {\n // TODO?\n // this.zip.close();\n }\n }\n\n public entriesCount(): number {\n return this.zip.files.length;\n }\n\n public hasEntries(): boolean {\n return this.entriesCount() > 0;\n }\n\n public hasEntry(entryPath: string): boolean {\n return this.hasEntries() && this.entries[entryPath];\n }\n\n public async getEntries(): Promise<string[]> {\n\n if (!this.hasEntries()) {\n return Promise.resolve([]);\n }\n return Promise.resolve(Object.keys(this.entries));\n }\n\n public async entryStreamPromise(entryPath: string): Promise<IStreamAndLength> {\n\n // debug(`entryStreamPromise: ${entryPath}`);\n\n if (!this.hasEntries() || !this.hasEntry(entryPath)) {\n return Promise.reject(\"no such path in zip: \" + entryPath);\n }\n\n return new Promise<IStreamAndLength>((resolve, _reject) => {\n\n const entry = this.entries[entryPath];\n debug(entry);\n\n const stream: NodeJS.ReadableStream = entry.stream();\n const streamAndLength: IStreamAndLength = {\n length: entry.size,\n reset: async () => {\n return this.entryStreamPromise(entryPath);\n },\n stream,\n };\n resolve(streamAndLength);\n });\n }\n}\n"]} |