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/*!
* Connect - favicon
* Copyright(c) 2010 Sencha Inc.
* Copyright(c) 2011 TJ Holowaychuk
* MIT Licensed
*/
/**
* Module dependencies.
*/
var fs = require('fs')
, utils = require('../utils');
/**
* Favicon cache.
*/
var icon;
/**
* By default serves the connect favicon, or the favicon
* located by the given `path`.
*
* Options:
*
* - `maxAge` cache-control max-age directive, defaulting to 1 day
*
* Examples:
*
* connect.createServer(
* connect.favicon()
* );
*
* connect.createServer(
* connect.favicon(__dirname + '/public/favicon.ico')
* );
*
* @param {String} path
* @param {Object} options
* @return {Function}
* @api public
*/
module.exports = function favicon(path, options){
var options = options || {}
, path = path || '/usr/share/node-connect/public/favicon.ico'
, maxAge = options.maxAge || 86400000;
return function favicon(req, res, next){
if ('/favicon.ico' == req.url) {
if (icon) {
res.writeHead(200, icon.headers);
res.end(icon.body);
} else {
fs.readFile(path, function(err, buf){
if (err) return next(err);
icon = {
headers: {
'Content-Type': 'image/x-icon'
, 'Content-Length': buf.length
, 'ETag': '"' + utils.md5(buf) + '"'
, 'Cache-Control': 'public, max-age=' + (maxAge / 1000)
},
body: buf
};
res.writeHead(200, icon.headers);
res.end(icon.body);
});
}
} else {
next();
}
};
};