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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 fs from \"fs\";\nimport * as path from \"path\";\nimport * as request from \"request\";\nimport * as requestPromise from \"request-promise-native\";\n\nimport { streamToBufferPromise } from \"@r2-utils-js/_utils/stream/BufferUtils\";\nimport { injectFileInZip } from \"@r2-utils-js/_utils/zip/zipInjector\";\n\nimport { LCP } from \"./parser/epub/lcp\";\nimport { TaJsonDeserialize } from \"./serializable\";\n\nconst debug = debug_(\"r2:lcp#publication-download\");\n\nconst IS_DEV = (process.env.NODE_ENV === \"development\" || process.env.NODE_ENV === \"dev\");\n\nexport async function downloadEPUBFromLCPL(filePath: string, dir: string, destFileName: string): Promise<string[]> {\n\n return new Promise<string[]>(async (resolve, reject) => {\n\n const lcplStr = fs.readFileSync(filePath, { encoding: \"utf8\" });\n // debug(lcplStr);\n const lcplJson = global.JSON.parse(lcplStr);\n const lcpl = TaJsonDeserialize<LCP>(lcplJson, LCP);\n if (lcpl.Links) {\n const pubLink = lcpl.Links.find((link) => {\n return link.Rel === \"publication\";\n });\n if (pubLink) {\n\n const isAudio = pubLink.Type === \"application/audiobook+zip\";\n const isAudioLcp = pubLink.Type === \"application/audiobook+lcp\";\n\n const ext = isAudio ? \".audiobook\" : (isAudioLcp ? \".lcpa\" : \".epub\");\n\n const destPathTMP = path.join(dir, destFileName + \".tmp\");\n const destPathFINAL = path.join(dir, destFileName + ext);\n\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n const failure = (err: any) => {\n debug(err);\n reject(pubLink.Href + \" (\" + err + \")\");\n };\n\n const success = async (response: request.RequestResponse) => {\n if (IS_DEV) {\n Object.keys(response.headers).forEach((header: string) => {\n debug(header + \" => \" + response.headers[header]);\n });\n }\n\n if (response.statusCode && (response.statusCode < 200 || response.statusCode >= 300)) {\n let failBuff: Buffer;\n try {\n failBuff = await streamToBufferPromise(response);\n } catch (buffErr) {\n if (IS_DEV) {\n debug(buffErr);\n }\n failure(response.statusCode);\n return;\n }\n try {\n const failStr = failBuff.toString(\"utf8\");\n if (IS_DEV) {\n debug(failStr);\n }\n try {\n const failJson = global.JSON.parse(failStr);\n if (IS_DEV) {\n debug(failJson);\n }\n failJson.httpStatusCode = response.statusCode;\n failure(failJson);\n } catch (jsonErr) {\n if (IS_DEV) {\n debug(jsonErr);\n }\n failure({ httpStatusCode: response.statusCode, httpResponseBody: failStr });\n }\n } catch (strErr) {\n if (IS_DEV) {\n debug(strErr);\n }\n failure(response.statusCode);\n }\n return;\n }\n\n const destStreamTMP = fs.createWriteStream(destPathTMP);\n response.pipe(destStreamTMP);\n // response.on(\"end\", () => {\n // });\n destStreamTMP.on(\"finish\", () => {\n\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n const zipError = (err: any) => {\n debug(err);\n reject(destPathTMP + \" (\" + err + \")\");\n };\n\n const doneCallback = () => {\n setTimeout(() => {\n fs.unlinkSync(destPathTMP);\n }, 1000);\n\n resolve([destPathFINAL, pubLink.Href]);\n };\n\n const zipEntryPath = (isAudio || isAudioLcp) ? \"license.lcpl\" : \"META-INF/license.lcpl\";\n\n injectFileInZip(destPathTMP, destPathFINAL, filePath, zipEntryPath, zipError, doneCallback);\n });\n };\n\n // No response streaming! :(\n // https://github.com/request/request-promise/issues/90\n const needsStreamingResponse = true;\n if (needsStreamingResponse) {\n request.get({\n headers: {},\n method: \"GET\",\n timeout: 5000,\n uri: pubLink.Href,\n })\n .on(\"response\", async (res) => {\n try {\n await success(res);\n }\n catch (successError) {\n failure(successError);\n return;\n }\n })\n .on(\"error\", failure);\n } else {\n let response: requestPromise.FullResponse;\n try {\n // tslint:disable-next-line:await-promise no-floating-promises\n response = await requestPromise({\n headers: {},\n method: \"GET\",\n resolveWithFullResponse: true,\n uri: pubLink.Href,\n });\n } catch (err) {\n failure(err);\n return;\n }\n\n await success(response);\n }\n }\n }\n });\n}\n"]} |