3.9 KiB
negotiator
An HTTP content negotiator for Node.js
Installation
$ npm install negotiator
API
var Negotiator = require('negotiator')
Accept Negotiation
availableMediaTypes = ['text/html', 'text/plain', 'application/json']
// The negotiator constructor receives a request object
negotiator = new Negotiator(request)
// Let's say Accept header is 'text/html, application/*;q=0.2, image/jpeg;q=0.8'
negotiator.mediaTypes()
// -> ['text/html', 'image/jpeg', 'application/*']
negotiator.mediaTypes(availableMediaTypes)
// -> ['text/html', 'application/json']
negotiator.mediaType(availableMediaTypes)
// -> 'text/html'
You can check a working example at examples/accept.js.
Methods
mediaTypes(availableMediaTypes):
Returns an array of preferred media types ordered by priority from a list of available media types.
mediaType(availableMediaType):
Returns the top preferred media type from a list of available media types.
Accept-Language Negotiation
negotiator = new Negotiator(request)
availableLanguages = 'en', 'es', 'fr'
// Let's say Accept-Language header is 'en;q=0.8, es, pt'
negotiator.languages()
// -> ['es', 'pt', 'en']
negotiator.languages(availableLanguages)
// -> ['es', 'en']
language = negotiator.language(availableLanguages)
// -> 'es'
You can check a working example at examples/language.js.
Methods
languages(availableLanguages):
Returns an array of preferred languages ordered by priority from a list of available languages.
language(availableLanguages):
Returns the top preferred language from a list of available languages.
Accept-Charset Negotiation
availableCharsets = ['utf-8', 'iso-8859-1', 'iso-8859-5']
negotiator = new Negotiator(request)
// Let's say Accept-Charset header is 'utf-8, iso-8859-1;q=0.8, utf-7;q=0.2'
negotiator.charsets()
// -> ['utf-8', 'iso-8859-1', 'utf-7']
negotiator.charsets(availableCharsets)
// -> ['utf-8', 'iso-8859-1']
negotiator.charset(availableCharsets)
// -> 'utf-8'
You can check a working example at examples/charset.js.
Methods
charsets(availableCharsets):
Returns an array of preferred charsets ordered by priority from a list of available charsets.
charset(availableCharsets):
Returns the top preferred charset from a list of available charsets.
Accept-Encoding Negotiation
availableEncodings = ['identity', 'gzip']
negotiator = new Negotiator(request)
// Let's say Accept-Encoding header is 'gzip, compress;q=0.2, identity;q=0.5'
negotiator.encodings()
// -> ['gzip', 'identity', 'compress']
negotiator.encodings(availableEncodings)
// -> ['gzip', 'identity']
negotiator.encoding(availableEncodings)
// -> 'gzip'
You can check a working example at examples/encoding.js.
Methods
encodings(availableEncodings):
Returns an array of preferred encodings ordered by priority from a list of available encodings.
encoding(availableEncodings):
Returns the top preferred encoding from a list of available encodings.