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ed1a42f7f3
no-issue The current public file middleware handles route matching itself, which means it is applied to express via the use method. Due to use being a "global" application of middleware, this means it is not possible to apply a labs middleware before the public file serving middleware without it affecting the entire route stack. This commit exports a piece of raw middleware that can be used with the get method of express, so that we can attach middleware beforehand. This will be used to conditionally serve the members specific public files, based on the labs flag for members.
62 lines
2.3 KiB
JavaScript
62 lines
2.3 KiB
JavaScript
const crypto = require('crypto');
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const fs = require('fs-extra');
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const path = require('path');
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const config = require('../../../config');
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const urlService = require('../../../services/url');
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function createPublicFileMiddleware(file, type, maxAge) {
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let content;
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const publicFilePath = config.get('paths').publicFilePath;
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const filePath = file.match(/^public/) ? path.join(publicFilePath, file.replace(/^public/, '')) : path.join(publicFilePath, file);
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const blogRegex = /(\{\{blog-url\}\})/g;
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const apiRegex = /(\{\{api-url\}\})/g;
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return function servePublicFile(req, res, next) {
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if (content) {
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res.writeHead(200, content.headers);
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return res.end(content.body);
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}
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fs.readFile(filePath, (err, buf) => {
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if (err) {
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return next(err);
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}
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let str = buf.toString();
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if (type === 'text/xsl' || type === 'text/plain' || type === 'application/javascript') {
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str = str.replace(blogRegex, urlService.utils.urlFor('home', true).replace(/\/$/, ''));
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str = str.replace(apiRegex, urlService.utils.urlFor('api', {cors: true, version: 'v0.1', versionType: 'content'}, true));
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}
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content = {
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headers: {
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'Content-Type': type,
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'Content-Length': Buffer.from(str).length,
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ETag: `"${crypto.createHash('md5').update(str, 'utf8').digest('hex')}"`,
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'Cache-Control': `public, max-age=${maxAge}`
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},
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body: str
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};
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res.writeHead(200, content.headers);
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res.end(content.body);
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});
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};
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}
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// ### servePublicFile Middleware
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// Handles requests to robots.txt and favicon.ico (and caches them)
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function servePublicFile(file, type, maxAge) {
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const publicFileMiddleware = createPublicFileMiddleware(file, type, maxAge);
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return function servePublicFile(req, res, next) {
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if (req.path === '/' + file) {
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return publicFileMiddleware(req, res, next);
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} else {
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return next();
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}
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};
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}
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module.exports = servePublicFile;
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module.exports.servePublicFile = servePublicFile;
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module.exports.createPublicFileMiddleware = createPublicFileMiddleware;
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