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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

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

Supported Header Fields

Accept

Parsed into req.accept.types.

Accept-Charset

Parsed into req.accept.charsets.

Accept-Encoding

Parsed into req.accept.encodings.

Accept-Language

Parsed into req.accept.languages.

Accept-Ranges

Parsed into req.accept.ranges.

Installation

npm install http-accept

Usage

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
    res.end()

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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