Fixed some game-stopping issues; corrected guest login.

Fixed: ajaxim.php would return an error if no DB_ENGINE was set. Now checks if DB_ENGINE has length before trying to import and create the Database class.
Fixed: server.js would crash on a Memcache "get username/someone" request if "someone" didn't exist.
Fixed: im.js tried to set document.domain with a period at the beginning for requests to subdomains.
Fixed: Actions that involve requesting to a subdomain now use JSONP instead of POST requests, since same-domain policies are a pain in my ass.
Fixed: Guest login in im.load.js fixed to use im.js "noSession" and "sessionNotResumed" hooks (ensures reconnect regardless of circumstance).

ajaxim.php

@@ -27,22 +27,24 @@ require_once('libraries/db/base.php');
 require_once('libraries/server/base.php');
 
 # import the database library
-require_once('libraries/db/' . DB_ENGINE . '.php');
-$db_class = DB_ENGINE . '_Database';
+if(strlen(DB_ENGINE)) {
+    require_once('libraries/db/' . DB_ENGINE . '.php');
+    $db_class = DB_ENGINE . '_Database';
 
-if (!function_exists('class_alias')) {
-    // Allows us to alias Database library classes to standardized names
-    function class_alias($original, $alias) {
-        eval('class ' . $alias . ' extends ' . $original . ' {}');
+    if (!function_exists('class_alias')) {
+        // Allows us to alias Database library classes to standardized names
+        function class_alias($original, $alias) {
+            eval('class ' . $alias . ' extends ' . $original . ' {}');
+        }
     }
+    
+    class_alias(DB_ENGINE . '_Database', 'Database');
+    class_alias(DB_ENGINE . '_User', 'User');
+    class_alias(DB_ENGINE . '_Status', 'Status');
+    class_alias(DB_ENGINE . '_Message', 'Message');
+    class_alias(DB_ENGINE . '_Friend', 'Friend');
 }
 
-class_alias(DB_ENGINE . '_Database', 'Database');
-class_alias(DB_ENGINE . '_User', 'User');
-class_alias(DB_ENGINE . '_Status', 'Status');
-class_alias(DB_ENGINE . '_Message', 'Message');
-class_alias(DB_ENGINE . '_Friend', 'Friend');
-
 // Fix problems with magic_quotes_gpc/sybase
 if(function_exists('get_magic_quotes_gpc') && get_magic_quotes_gpc()) {
     $syb = strtolower(ini_get('magic_quotes_sybase'));

install.php

@@ -54,8 +54,7 @@
                 
             h1 {
                 text-indent: -10000px;
-                /*background: url(http://ajaxim.com/images/logo.png?install);*/
-                background: url(site/demo/images/logo.png);
+                background: url(http://ajaxim.com/images/logo.png);
                 width: 146px;
                 height: 44px;
                 margin: 0 0.5em 0 0;

js/im.load.js

@@ -71,7 +71,10 @@ var AjaxIM, AjaxIMLoadedFunction;
                 status: 'http://' + nodehost + '/status',
                 resume: 'http://' + nodehost + '/resume'
             });
-            AjaxIM.client.login();
+            function tmplogin() { AjaxIM.client.login(); }
+            $(AjaxIM.client)
+                .bind('noSession', tmplogin)
+                .bind('sessionNotResumed', tmplogin);
         }
         
         AjaxIM.loaded();

server/server.js

@@ -30,9 +30,10 @@
 var sys = require('sys'),
     http = require('http'),
     tcp = require('tcp'),
-    url = require('url'),
     config = require('./config');
 
+try { url = require('url'); } catch(e) {}
+
 var AjaxIM = function(config) {
     var self = this;
     
@@ -482,13 +483,17 @@ var AjaxIM = function(config) {
     // ==== Parameters ====
     // * {{{username}}} is the name of the user to retrieve.
     this.apiGetUser = function(username) {
-        var user = this.users[username];
-        return {
-            username: user.username,
-            user_id: user.user_id,
-            status: user.status,
-            session_id: user.session_id
-        };
+        if(username in this.users) {
+            var user = this.users[username];
+            return {
+                username: user.username,
+                user_id: user.user_id,
+                status: user.status,
+                session_id: user.session_id
+            };
+        } else {
+            return false;
+        }
     };
     
     // === {{{ AjaxIM.apiGetSession(session_id) }}} ===