Migrating from 2.x to 3.x

Removed

• res.render() "status" option (use res.statusCode=)
• res.render() "charset" option (use res.charset=)
• app.dynamicHelpers() (use app.locals.use(callback))
• app.helpers() (use app.locals)
• app.VERB(path) for route lookup
• the concept of a "layout" (template engine specific now)
• partial() (template engine specific)
• res.partial()
• "view options" setting, use app.locals
• "hints" setting
• req.isXMLHttpRequest (use req.xhr)
• app.error() (use middleware with (err, req, res, next))

Changed

• res.send(body[, code]) is now res.send([code,] body)
• res.redirect(url[, code]) is now res.redirect([code,] url)
• res.json(obj[, code]) is now res.json([code,] obj)
• renamed app.register() to app.engine()

Added

• app "root" setting
• app.get(setting) => value
• req.secure to check if the request was made via HTTPS
• req.path to grab the url pathname
• new tests using mocha
• res.set(field, value) to set a header field value
• res.set(obj) to set several values
• res.locals.NAME = val
• res.locals(obj) to set several locals
• app.locals.NAME = val
• app.locals(obj) to set several app-level locals
• app.render()
• res.type() alias of res.contentType()
• res.clearCookie() "path" defaults to the "root" setting
• res.cookie() "path" defaults to the "root" setting
• res.headerSent
• res.charset=
• req.stale
• req.fresh
• JSON cookie support
• signed cookie support

Fixed

• several subtle res.sendfile() bugs