r2-lcp-js/dist/es8-es2017/src/publication-download.js

Readium 2 LCP bits for NodeJS (TypeScript)

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.downloadEPUBFromLCPL = downloadEPUBFromLCPL;
const debug_ = require("debug");
const fs = require("fs");
const path = require("path");
const request = require("request");
const BufferUtils_1 = require("r2-utils-js/dist/es8-es2017/src/_utils/stream/BufferUtils");
const zipInjector_1 = require("r2-utils-js/dist/es8-es2017/src/_utils/zip/zipInjector");
const lcp_1 = require("./parser/epub/lcp");
const serializable_1 = require("./serializable");
const debug = debug_("r2:lcp#publication-download");
const IS_DEV = (process.env.NODE_ENV === "development" || process.env.NODE_ENV === "dev");
async function downloadEPUBFromLCPL(filePath, dir, destFileName) {
    return new Promise(async (resolve, reject) => {
        const lcplStr = fs.readFileSync(filePath, { encoding: "utf8" });
        const lcplJson = global.JSON.parse(lcplStr);
        const lcpl = (0, serializable_1.TaJsonDeserialize)(lcplJson, lcp_1.LCP);
        if (lcpl.Links) {
            const pubLink = lcpl.Links.find((link) => {
                return link.Rel === "publication";
            });
            if (pubLink) {
                const isAudio = pubLink.Type === "application/audiobook+zip";
                const isAudioLcp = pubLink.Type === "application/audiobook+lcp";
                const ext = isAudio ? ".audiobook" : (isAudioLcp ? ".lcpa" : ".epub");
                const destPathTMP = path.join(dir, destFileName + ".tmp");
                const destPathFINAL = path.join(dir, destFileName + ext);
                const failure = (err) => {
                    debug(err);
                    reject(pubLink.Href + " (" + err + ")");
                };
                const success = async (response) => {
                    if (IS_DEV) {
                        Object.keys(response.headers).forEach((header) => {
                            debug(header + " => " + response.headers[header]);
                        });
                    }
                    if (response.statusCode && (response.statusCode < 200 || response.statusCode >= 300)) {
                        let failBuff;
                        try {
                            failBuff = await (0, BufferUtils_1.streamToBufferPromise)(response);
                        }
                        catch (buffErr) {
                            if (IS_DEV) {
                                debug(buffErr);
                            }
                            failure(response.statusCode);
                            return;
                        }
                        try {
                            const failStr = failBuff.toString("utf8");
                            if (IS_DEV) {
                                debug(failStr);
                            }
                            try {
                                const failJson = global.JSON.parse(failStr);
                                if (IS_DEV) {
                                    debug(failJson);
                                }
                                failJson.httpStatusCode = response.statusCode;
                                failure(failJson);
                            }
                            catch (jsonErr) {
                                if (IS_DEV) {
                                    debug(jsonErr);
                                }
                                failure({ httpStatusCode: response.statusCode, httpResponseBody: failStr });
                            }
                        }
                        catch (strErr) {
                            if (IS_DEV) {
                                debug(strErr);
                            }
                            failure(response.statusCode);
                        }
                        return;
                    }
                    const destStreamTMP = fs.createWriteStream(destPathTMP);
                    response.pipe(destStreamTMP);
                    destStreamTMP.on("finish", () => {
                        const zipError = (err) => {
                            debug(err);
                            reject(destPathTMP + " (" + err + ")");
                        };
                        const doneCallback = () => {
                            setTimeout(() => {
                                fs.unlinkSync(destPathTMP);
                            }, 1000);
                            resolve([destPathFINAL, pubLink.Href]);
                        };
                        const zipEntryPath = (isAudio || isAudioLcp) ? "license.lcpl" : "META-INF/license.lcpl";
                        (0, zipInjector_1.injectFileInZip)(destPathTMP, destPathFINAL, filePath, zipEntryPath, zipError, doneCallback);
                    });
                };
                request.get({
                    headers: {},
                    method: "GET",
                    timeout: 5000,
                    uri: pubLink.Href,
                })
                    .on("response", async (res) => {
                    try {
                        await success(res);
                    }
                    catch (successError) {
                        failure(successError);
                        return;
                    }
                })
                    .on("error", failure);
            }
        }
    });
}
//# sourceMappingURL=publication-download.js.map