100 lines
3.7 KiB
JavaScript
100 lines
3.7 KiB
JavaScript
const fs = require('fs-extra');
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const path = require('path');
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const express = require('express');
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const utils = require('./core/utils');
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const webAppDir = require('../build/appdir');
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const log = new (require('./core/AppLogger'))().log;//singleton
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module.exports = (app, config) => {
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/*
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config.bookPathStatic = `${config.rootPathStatic}/book`;
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config.bookDir = `${config.publicFilesDir}/book`;
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*/
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//загрузка или восстановление файлов в /public-files, при необходимости
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app.use(config.bookPathStatic, async(req, res, next) => {
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if (req.method !== 'GET' && req.method !== 'HEAD') {
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return next();
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}
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if (path.extname(req.path) == '') {
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const bookFile = `${config.bookDir}${req.path}`;
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const bookFileDesc = `${bookFile}.d.json`;
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let downFileName = '';
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//восстановим из json-файла описания
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try {
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if (await fs.pathExists(bookFile) && await fs.pathExists(bookFileDesc)) {
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await utils.touchFile(bookFile);
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await utils.touchFile(bookFileDesc);
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let desc = await fs.readFile(bookFileDesc, 'utf8');
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desc = JSON.parse(desc);
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downFileName = desc.downFileName;
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} else {
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await fs.remove(bookFile);
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await fs.remove(bookFileDesc);
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}
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} catch(e) {
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log(LM_ERR, e.message);
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}
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if (downFileName) {
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res.downFileName = downFileName;
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if (!req.acceptsEncodings('gzip')) {
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//не принимает gzip, тогда распакуем
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const rawFile = `${bookFile}.raw`;
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if (!await fs.pathExists(rawFile))
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await utils.gunzipFile(bookFile, rawFile);
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req.url += '.raw';
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res.rawFile = true;
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}
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}
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}
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return next();
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});
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//заголовки при отдаче
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app.use(config.bookPathStatic, express.static(config.bookDir, {
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setHeaders: (res) => {
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if (res.downFileName) {
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if (!res.rawFile)
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res.set('Content-Encoding', 'gzip');
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res.set('Content-Disposition', `inline; filename*=UTF-8''${encodeURIComponent(res.downFileName)}`);
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}
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},
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}));
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if (config.rootPathStatic) {
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//подмена rootPath в файлах статики WebApp при необходимости
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app.use(config.rootPathStatic, async(req, res, next) => {
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if (req.method !== 'GET' && req.method !== 'HEAD') {
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return next();
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}
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const reqPath = (req.path == '/' ? '/index.html' : req.path);
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const ext = path.extname(reqPath);
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if (ext == '.html' || ext == '.js' || ext == '.css') {
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const reqFile = `${config.publicDir}${reqPath}`;
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const flagFile = `${reqFile}.replaced`;
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if (!await fs.pathExists(flagFile) && await fs.pathExists(reqFile)) {
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const content = await fs.readFile(reqFile, 'utf8');
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const re = new RegExp(`/${webAppDir}`, 'g');
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await fs.writeFile(reqFile, content.replace(re, `${config.rootPathStatic}/${webAppDir}`));
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await fs.writeFile(flagFile, '');
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}
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}
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return next();
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});
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}
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//статика файлов WebApp
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app.use(config.rootPathStatic, express.static(config.publicDir));
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}; |