gistfile1.js

var express  = require('express');

var app = express();

app.all('/foo',

	function(req, res, next) {
		res.write('bar');
		next();
	}
)

app.listen(8000);




Error: Can't set headers after they are sent.
    at ServerResponse.OutgoingMessage.setHeader (http.js:691:11)
    at ServerResponse.res.setHeader (/Users/db/spaghetti/example/node_modules/express/node_modules/connect/lib/patch.js:63:22)
    at next (/Users/db/spaghetti/example/node_modules/express/node_modules/connect/lib/proto.js:156:13)
    at pass (/Users/db/spaghetti/example/node_modules/express/lib/router/index.js:110:24)
    at nextRoute (/Users/db/spaghetti/example/node_modules/express/lib/router/index.js:100:7)
    at callbacks (/Users/db/spaghetti/example/node_modules/express/lib/router/index.js:167:11)
    at /Users/db/spaghetti/example/index.js:10:3
    at callbacks (/Users/db/spaghetti/example/node_modules/express/lib/router/index.js:164:37)
    at param (/Users/db/spaghetti/example/node_modules/express/lib/router/index.js:138:11)
    at pass (/Users/db/spaghetti/example/node_modules/express/lib/router/index.js:145:5)