90 lines
3.3 KiB
JavaScript
90 lines
3.3 KiB
JavaScript
var fs = require('fs'),
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path = require('path'),
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crypto = require('crypto'),
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storage = require('../adapters/storage'),
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utils = require('../utils'),
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config = require('../config'),
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settingsCache = require('../settings/cache'),
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blogIconUtils = require('../utils/blog-icon'),
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buildContentResponse,
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content;
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buildContentResponse = function 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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var iconType,
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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 = blogIconUtils.getIconPath();
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var originalExtension = path.extname(filePath).toLowerCase(),
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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, utils.url.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(function readFile(buf) {
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iconType = blogIconUtils.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(function (err) {
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next(err);
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});
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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, utils.url.urlFor({relativeUrl: '/favicon.ico'}));
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}
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fs.readFile(filePath, function readFile(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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next();
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}
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};
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}
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module.exports = serveFavicon;
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