The req object represents the HTTP request and has properties for request query strings, parameters, body, HTTP headers, etc.
Request Object Properties
Sr.No. | Properties & Description |
---|---|
1 | req.app This property holds a reference to the instance of the express application that is using the middleware. |
2 | req.baseUrl The URL path on which a router instance was mounted. |
3 | req.body Contains key-value pairs of data submitted in the request body. By default, it is undefined, and is populated when you use body-parsing middleware such as body-parser |
4 | req.cookies When using cookie-parser middleware, this property is an object that contains cookies sent by the request. |
5 | req.fresh Indicates whether the request is "fresh." It is the opposite of req.stale. |
6 | req.hostname Contains the hostname from the "Host" HTTP header. |
7 | req.ip The remote IP address of the request. |
8 | req.ips When the trust proxy setting is true, this property contains an array of IP addresses specified in the “X-Forwarded-For” request header. |
9 | req.originalUrl This property is much like req.url; however, it retains the original request URL, allowing you to rewrite req.url freely for internal routing purposes. |
10 | req.params An object containing properties mapped to the named route “parameters”. For example, if you have the route /user/:name, then the "name" property is available as req.params.name. This object defaults to {}. |
11 | req.path Contains the path part of the request URL. |
12 | req.protocol The request protocol string, "http" or "https" when requested with TLS. |
13 | req.query An object containing a property for each query string parameter in the route. |
14 | req.route The currently-matched route, a string. |
15 | req.secure A Boolean that is true if a TLS connection is established. |
16 | req.signedCookies When using cookie-parser middleware, this property contains signed cookies sent by the request, unsigned and ready for use. |
17 | req.stale Indicates whether the request is "stale," and is the opposite of req.fresh. |
18 | req.subdomains An array of subdomains in the domain name of the request. |
19 | req.xhr A Boolean value that is true if the request’s "X-Requested-With" header field is “XMLHttpRequest”, indicating that the request was issued by a client library such as jQuery. |
Request Object Methods
req.accepts(types)
req.accepts(types)
Example
// Accept: text/html req.accepts('html'); // => "html" // Accept: text/*, application/json req.accepts('html'); // => "html" req.accepts('text/html'); // => "text/html"
req.get(field)
req.get(field)
Example
req.get('Content-Type'); // => "text/plain" req.get('content-type'); // => "text/plain" req.get('Something'); // => undefined
req.is(type)
req.is(type)
Example
// With Content-Type: text/html; charset=utf-8 req.is('html'); req.is('text/html'); req.is('text/*'); // => true
req.param(name [, defaultValue])
req.param(name [, defaultValue])
Example
// ?name=tobi req.param('name') // => "tobi" // POST name=tobi req.param('name') // => "tobi" // /user/tobi for /user/:name req.param('name') // => "tobi"
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