Install the "express" node module via npm

[obsolete/notmuch-web] / node_modules / express / node_modules / connect / lib / middleware / favicon.js

diff --git a/node_modules/express/node_modules/connect/lib/middleware/favicon.js b/node_modules/express/node_modules/connect/lib/middleware/favicon.js
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+++ b/node_modules/express/node_modules/connect/lib/middleware/favicon.js
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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 || __dirname + '/../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();
+    }
+  };
+};
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