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var httpAccept = require("http-accept")

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http-accept v0.1.6

Connect compatible middleware that parses HTTP Accept header fields


Accept parses all accept header fields and sorts them according to the HTTP specification.

Supported Header Fields


Parsed into req.accept.types.


Parsed into req.accept.charsets.


Parsed into req.accept.encodings.


Parsed into req.accept.languages.


Parsed into req.accept.ranges.


npm install http-accept


Just require 'http-accept' and throw it into a connect compatible middlware stack.

connect  = require 'connect'
http     = require 'http'
accept   = require 'http-accept'

app = connect()
app.use connect.logger 'dev'
app.use accept
app.use (req, res) ->
    console.log req.accept

app.listen 3000

A request from a browser on http://localhost:3000 would print out

{ types: 
   [ { type: 'text',
       subtype: 'html',
       params: {},
       mediarange: 'text/html',
       quality: 1 },
     { type: 'application',
       subtype: 'xhtml+xml',
       params: {},
       mediarange: 'application/xhtml+xml',
       quality: 1 },
     { type: 'application',
       subtype: 'xml',
       params: [Object],
       mediarange: 'application/xml',
       quality: 0.9 },
     { type: '*',
       subtype: '*',
       params: [Object],
       mediarange: '*/*',
       quality: 0.8 } ],
  charsets: undefined,
  encodings: [ 'gzip', 'deflate' ],
  languages: [ 'de-de', 'de', 'en-us', 'en' ],
  ranges: undefined }

For each header present in the request, there is also a getBestMatch method which will find the highest quality match amongst the supplied candidates.

encoding = (req.accept.encodings?.getBestMatch ["gzip", "deflate"]) ? "identity"
mediaType = req.accept.types?.getBestMatch ["text/html", "application/json" ,"application/xml"]
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