mirror of https://github.com/TryGhost/Ghost.git
88 lines
3.2 KiB
JavaScript
88 lines
3.2 KiB
JavaScript
const fs = require('fs-extra');
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const path = require('path');
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const crypto = require('crypto');
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const config = require('../../../../shared/config');
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const {blogIcon} = require('../../../lib/image');
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const storage = require('../../../adapters/storage');
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const urlUtils = require('../../../lib/url-utils');
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const settingsCache = require('../../../services/settings/cache');
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let content;
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const buildContentResponse = (ext, buf) => {
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content = {
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headers: {
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'Content-Type': `image/${ext}`,
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'Content-Length': buf.length,
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ETag: `"${crypto.createHash('md5').update(buf, 'utf8').digest('hex')}"`,
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'Cache-Control': `public, max-age=${config.get('caching:favicon:maxAge')}`
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},
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body: buf
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};
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return content;
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};
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// ### serveFavicon Middleware
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// Handles requests to favicon.png and favicon.ico
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function serveFavicon() {
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let iconType;
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let filePath;
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return function serveFavicon(req, res, next) {
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if (req.path.match(/^\/favicon\.(ico|png)/i)) {
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// CASE: favicon is default
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// confusing: if you upload an icon, it's same logic as storing images
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// we store as /content/images, because this is the url path images get requested via the browser
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// we are using an express route to skip /content/images and the result is a image path
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// based on config.getContentPath('images') + req.path
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// in this case we don't use path rewrite, that's why we have to make it manually
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filePath = blogIcon.getIconPath();
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let originalExtension = path.extname(filePath).toLowerCase();
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const requestedExtension = path.extname(req.path).toLowerCase();
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// CASE: custom favicon exists, load it from local file storage
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if (settingsCache.get('icon')) {
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// depends on the uploaded icon extension
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if (originalExtension !== requestedExtension) {
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return res.redirect(302, urlUtils.urlFor({relativeUrl: `/favicon${originalExtension}`}));
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}
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storage.getStorage()
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.read({path: filePath})
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.then((buf) => {
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iconType = blogIcon.getIconType();
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content = buildContentResponse(iconType, buf);
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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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.catch(next);
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} else {
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originalExtension = path.extname(filePath).toLowerCase();
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// CASE: always redirect to .ico for default icon
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if (originalExtension !== requestedExtension) {
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return res.redirect(302, urlUtils.urlFor({relativeUrl: '/favicon.ico'}));
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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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content = buildContentResponse('x-icon', buf);
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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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} 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 = serveFavicon;
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