preparse static elements rather than fs'ing them

lib/static_handler.js

@@ -8,6 +8,12 @@ var winston = require('winston');
 var StaticHandler = function(path) {
   this.basePath = path;
   this.defaultPath = '/index.html';
+  // Grab the list of available files - and move into hash for quick lookup
+  var available = fs.readdirSync(this.basePath);
+  this.availablePaths = {};
+  for (var i = 0; i < available.length; i++) {
+    this.availablePaths['/' + available[i]] = true;
+  }
 };
 
 // Determine the content type for a given extension
@@ -24,26 +30,21 @@ StaticHandler.contentTypeFor = function(ext) {
 
 // Handle a request, and serve back the asset if it exists
 StaticHandler.prototype.handle = function(incPath, response) {
+  // Go to index if not found or /
+  if (!this.availablePaths[incPath]) incPath = this.defaultPath;
   var filePath = this.basePath + (incPath == '/' ? this.defaultPath : incPath);
+  // And then stream the file back
   var _this = this;
-  path.exists(filePath, function(exists) {
-    if (exists) {
-      fs.readFile(filePath, function(error, content) {
-        if (error) {
-          winston.error('unable to read file', { path: filePath, error: error.message });
-          response.writeHead(500, { 'content-type': 'application/json' });
-          response.end(JSON.stringify({ message: 'IO: Unable to read file' }));
-        }
-        else {
-          var contentType = StaticHandler.contentTypeFor(path.extname(filePath));
-          response.writeHead(200, { 'content-type': contentType });
-          response.end(content, 'utf-8');
-        }
-      });    
+  fs.readFile(filePath, function(error, content) {
+    if (error) {
+      winston.error('unable to read file', { path: filePath, error: error.message });
+      response.writeHead(500, { 'content-type': 'application/json' });
+      response.end(JSON.stringify({ message: 'IO: Unable to read file' }));
     }
     else {
-      // serve the default route so that pushstate can work if not found
-      _this.handle('/', response);
+      var contentType = StaticHandler.contentTypeFor(path.extname(filePath));
+      response.writeHead(200, { 'content-type': contentType });
+      response.end(content, 'utf-8');
     }
   });    
 };

server.js

@@ -26,7 +26,6 @@ if (config.logging) {
   }
 }
 
-// TODO preparse static instead of using exists
 // TODO implement command line
 
 // Set the server up