bump length of subdomain to 10

lib/rand_id.js

@@ -1,12 +1,13 @@
+// all url safe
+// can't use uppercase because hostnames are lowercased
+var chars = 'abcdefghijklmnopqrstuvwxyz';
 
-var chars = 'abcdefghiklmnopqrstuvwxyz';
 module.exports = function rand_id() {
     var randomstring = '';
-    for (var i=0; i<4; ++i) {
+    for (var i=0; i<10; ++i) {
         var rnum = Math.floor(Math.random() * chars.length);
         randomstring += chars[rnum];
     }
 
     return randomstring;
 }
-

server.js

@@ -32,7 +32,7 @@ function maybe_bounce(req, res, bounce) {
         return false;
     }
 
-    var match = hostname.match(/^([a-z]{4})[.].*/);
+    var match = hostname.match(/^([a-z0-9]{4,10})[.].*/);
 
     // not for a specific client
     // pass on to regular server
@@ -180,7 +180,7 @@ module.exports = function(opt) {
     app.get('/:req_id', function(req, res, next) {
         var req_id = req.param('req_id');
 
-        if (! /[a-z]{4}/.test(req_id)) {
+        if (! /[A-Za-z0-9]{4,10}/.test(req_id)) {
             return next();
         }