Improved font serving

src/serve_font.js

@@ -1,7 +1,9 @@
 'use strict';
 
 var clone = require('clone'),
-    express = require('express');
+    express = require('express'),
+    fs = require('fs'),
+    path = require('path');
 
 var utils = require('./utils');
 
@@ -12,14 +14,29 @@ module.exports = function(options, allowedFonts) {
 
   var fontPath = options.paths.fonts;
 
+  var existingFonts = {};
+  fs.readdir(options.paths.fonts, function(err, files) {
+    files.forEach(function(file) {
+      fs.stat(path.join(fontPath, file), function(err, stats) {
+        if (!err) {
+          if (stats.isDirectory()) {
+            existingFonts[path.basename(file)] = true;
+          }
+        }
+      });
+    });
+  });
+
   app.get('/:fontstack/:range([\\d]+-[\\d]+).pbf',
       function(req, res, next) {
     var fontstack = decodeURI(req.params.fontstack);
     var range = req.params.range;
 
-    return utils.getFontsPbf(allowedFonts, fontPath, fontstack, range,
+    return utils.getFontsPbf(allowedFonts, fontPath, fontstack, range, existingFonts,
         function(err, concated) {
       if (err || concated.length === 0) {
+        console.log(err);
+        console.log(concated.length);
         return res.status(400).send('');
       } else {
         res.header('Content-type', 'application/x-protobuf');