Add metadata when storing state.

Author: jaredhanson

lib/strategy.js

@@ -141,6 +141,12 @@ OAuth2Strategy.prototype.authenticate = function(req, options) {
       callbackURL = url.resolve(utils.originalURL(req, { proxy: this._trustProxy }), callbackURL);
     }
   }
+  
+  var meta = {
+    authorizationURL: this._oauth2._authorizeUrl,
+    tokenURL: this._oauth2._accessTokenUrl,
+    clientID: this._oauth2._clientId
+  }
 
   if (req.query && req.query.code) {
     var state = req.query.state;
@@ -208,13 +214,26 @@ OAuth2Strategy.prototype.authenticate = function(req, options) {
       var location = this._oauth2.getAuthorizeUrl(params);
       this.redirect(location);
     } else {
-      this._stateStore.store(req, function(err, state) {
+      function stored(err, state) {
         if (err) { return self.error(err); }
 
         if (state) { params.state = state; }
         var location = self._oauth2.getAuthorizeUrl(params);
         self.redirect(location);
-      });
+      }
+      
+      try {
+        var arity = this._stateStore.store.length;
+        if (arity == 3) {
+          this._stateStore.store(req, meta, stored);
+        } else { // arity == 2
+          this._stateStore.store(req, stored);
+        }
+        
+        
+      } catch (ex) {
+        return this.error(ex);
+      }
     }
   }
 };