Why isn't express-js setting the Content-Type header?

Question

I have the following:

var express = require('express'),     app = express.createServer();  app.get("/offline.manifest", function(req, res){   res.contentType("text/cache-manifest");   res.end("CACHE MANIFEST"); });  app.listen(8561); 

The network tab in Chrome says it's text/plain. Why isn't it setting the header?

The code above works, my problems were caused by a linking to an old version of express-js

Answer 1

res.type('json') works too now and as others have said, you can simply use
res.json({your: 'object'})

Answer 2

Try this code:

var express = require('express'),     app = express.createServer();  app.get("/offline.manifest", function(req, res){   res.header("Content-Type", "text/cache-manifest");   res.end("CACHE MANIFEST"); });  app.listen(8561); 

(I'm assuming you are using the latest release of express, 2.0.0)

UPDATE: I just did a quick test using Firefox 3.6.x and Live HTTP Headers. This is the addons output:

 HTTP/1.1 200 OK  X-Powered-By: Express  Content-Type: text/cache-manifest  Connection: keep-alive  Transfer-Encoding: chunked 

Make sure you clear your cache before trying.