app.set(name, value)

Sets app- specific properties

app.get(name)

Retrieves value set by app.set()

app.enable(name)

Enables a setting in the app

app.disable(name)

Disables a setting in the app

app.enabled(name)

Checks if a setting is enabled

app.disabled(name)

Checks if a setting is disabled

app.configure([env], callback)

Sets app settings conditionally based on the development environment

app.use([path], function)

Loads a middleware in the app

app.engine(ext, callback)

Registers a template engine for the app

app.param([name], callback)

Adds logic to route parameters

app.VERB(path, [callback...], callback)

Defines routes and handlers based on HTTP verbs

app.all(path, [callback...], callback)

Defines routes and handlers for all HTTP verbs

app.locals

The object to store variables accessible from any view

app.render(view, [options], callback)

Renders view from the app

app.routes

A list of routes defined in the app

app.listen()

Binds and listen for connections

req.params

Holds the values of named routes parameters

req.params(name)

Returns the value of a parameter from named routes or GET params or POST params

req.query

Holds the values of a GET form submission

req.body

Holds the values of a POST form submission

req.files

Holds the files uploaded via a form

req.route

Provides details about the current matched route

req.cookies

Cookie values

req.signedCookies

Signed cookie values

req.get(header)

Gets the request HTTP header

req.accepts(types)

Checks if the client accepts the media types

req.accepted

A list of accepted media types by the client

req.is(type)

Checks if the incoming request is of the particular media type

req.ip

The IP address of the client

req.ips

The IP address of the client, along with that of the proxies it is connected through

req.path

The request path

req.host

Hostname from the HTTP header

req.fresh

Checks if the request is still fresh

req.stale

Checks if the request is stale

req.xhr

Checks if the request came via an AJAX request

req.protocol

The protocol used for making the request

req.secure

Checks if it is a secure connection

req.subdomains

Subdomains of the host domain name

req.url

The request path, along with any query parameters

req.originalUrl

Used as a backup for req.url

req.acceptedLanguages

A list of accepted languages by the client

req.acceptsLanguage(langauge)

Checks if the client accepts the language

req.acceptedCharsets

A list of accepted charsets by the client

req.acceptsCharsets(charset)

Checks if the client accepts the charset

res.status(code)

Sets the HTTP response code

res.set(field, [value])

Sets response HTTP headers

res.get(header)

Gets the response HTTP header

res.cookie(name, value, [options])

Sets cookie on the client

res.clearCookie(name, [options])

Deletes cookie on the client

res.redirect([status], url)

Redirects the client to a URL, with an optional HTTP status code

res.location

The location value of the response HTTP header

res.charset

The charset value of the response HTTP header

res.send([body|status], [body])

Sends an HTTP response object, with an optional HTTP response code

res.json([status|body], [body])

Sends a JSON object for HTTP response, along with an optional HTTP response code

res.jsonp([status|body], [body])

Sends a JSON object for HTTP response with JSONP support, along with an optional HTTP response code

res.type(type)

Sets the media type HTTP response header

res.format(object)

Sends a response conditionally, based on the request HTTP Accept header

res.attachment([filename])

Sets response HTTP header Content-Disposition to attachment

res.sendfile(path, [options], [callback]])

Sends a file to the client

res.download(path, [filename], [callback])

Prompts the client to download a file

res.links(links)

Sets the HTTP Links header

res.locals

The object to store variables specific to the view rendering a request

res.render(view, [locals], callback)

Renders a view