Поправки для поддержки reverse-proxy, рефакторинг

2022-12-04 17:12:24 +07:00
parent 105680e38a
commit 409befce5e
6 changed files with 123 additions and 82 deletions
--- a/server/static.js
+++ b/server/static.js
@@ -0,0 +1,100 @@
+const fs = require('fs-extra');
+const path = require('path');
+
+const express = require('express');
+const utils = require('./core/utils');
+const webAppDir = require('../build/appdir');
+
+const log = new (require('./core/AppLogger'))().log;//singleton
+
+module.exports = (app, config) => {
+    /*
+    config.bookPathStatic = `${config.rootPathStatic}/book`;
+    config.bookDir = `${config.publicFilesDir}/book`;
+    */
+    //загрузка или восстановление файлов в /public-files, при необходимости
+    app.use(config.bookPathStatic, async(req, res, next) => {
+        if (req.method !== 'GET' && req.method !== 'HEAD') {
+            return next();
+        }
+
+        if (path.extname(req.path) == '') {
+            const bookFile = `${config.bookDir}${req.path}`;
+            const bookFileDesc = `${bookFile}.d.json`;
+
+            let downFileName = '';
+            //восстановим из json-файла описания
+            try {
+                if (await fs.pathExists(bookFile) && await fs.pathExists(bookFileDesc)) {
+                    await utils.touchFile(bookFile);
+                    await utils.touchFile(bookFileDesc);
+
+                    let desc = await fs.readFile(bookFileDesc, 'utf8');
+                    desc = JSON.parse(desc);
+                    downFileName = desc.downFileName;
+                } else {
+                    await fs.remove(bookFile);
+                    await fs.remove(bookFileDesc);
+                }
+            } catch(e) {
+                log(LM_ERR, e.message);
+            }
+
+            if (downFileName) {
+                res.downFileName = downFileName;
+
+                if (!req.acceptsEncodings('gzip')) {
+                    //не принимает gzip, тогда распакуем
+                    const rawFile = `${bookFile}.raw`;
+                    if (!await fs.pathExists(rawFile))
+                        await utils.gunzipFile(bookFile, rawFile);
+
+                    req.url += '.raw';
+                    res.rawFile = true;
+                }
+            }
+        }
+
+        return next();
+    });
+
+    //заголовки при отдаче
+    app.use(config.bookPathStatic, express.static(config.bookDir, {
+        setHeaders: (res) => {
+            if (res.downFileName) {
+                if (!res.rawFile)
+                    res.set('Content-Encoding', 'gzip');
+
+                res.set('Content-Disposition', `inline; filename*=UTF-8''${encodeURIComponent(res.downFileName)}`);
+            }
+        },
+    }));
+
+    if (config.rootPathStatic) {
+        //подмена rootPath в файлах статики WebApp при необходимости
+        app.use(config.rootPathStatic, async(req, res, next) => {
+            if (req.method !== 'GET' && req.method !== 'HEAD') {
+                return next();
+            }
+
+            const reqPath = (req.path == '/' ? '/index.html' : req.path);
+            const ext = path.extname(reqPath);
+            if (ext == '.html' || ext == '.js' || ext == '.css') {
+                const reqFile = `${config.publicDir}${reqPath}`;
+                const flagFile = `${reqFile}.replaced`;
+
+                if (!await fs.pathExists(flagFile) && await fs.pathExists(reqFile)) {
+                    const content = await fs.readFile(reqFile, 'utf8');
+                    const re = new RegExp(`/${webAppDir}`, 'g');
+                    await fs.writeFile(reqFile, content.replace(re, `${config.rootPathStatic}/${webAppDir}`));
+                    await fs.writeFile(flagFile, '');
+                }
+            }
+
+            return next();
+        });
+    }
+
+    //статика файлов WebApp
+    app.use(config.rootPathStatic, express.static(config.publicDir));
+};