Access "app" variable inside of ExpressJS/ConnectJS middleware?

Question

This may not me be the right approach, but I want to conditionally add an object/parameter to the app variable inside of an expressJS/connectjS middleware call.

Since this function is a callback, what's the standard/best way to access app from inside a middleware call?

  //app.js   var myMiddleware = require('./lib/mymiddleware.js');   ...   app.configure( function(){     app.use( myMiddleware.func() );     ...   }    if( 'object' !== typeof app.myObject ){     cry( 'about it' );   }      //mymiddleware.js   module.exports.func = function( ){     return function( req, res, next ){        //append app object        //app.myObject = {}        next();     }   }; 

Note, this is not something for locals or settings to later be rendered, but something that will be used in routes and sockets later down the execution chain.

Answer 1

Request objects have an app field. Simply use req.app to access the app variable.

Answer 2

Generally I do the following.

var myMiddleware = require('./lib/mymiddleware.js')(app); ... app.configure( function(){   app.use( myMiddleware );   ... } 

And the middleware would look like this...

module.exports = function(app) {   app.doStuff.blah()    return function(req, res, next) {     // actual middleware   } }