Create and parse HTTP Content-Type header according to RFC 7231

$ npm install content-type

var contentType = require('content-type')

var obj = contentType.parse('image/svg+xml; charset=utf-8')

Parse a content type string. This will return an object with the following properties (examples are shown for the string 'image/svg+xml; charset=utf-8'):

• type: The media type (the type and subtype, always lower case). Example: 'image/svg+xml'

• parameters: An object of the parameters in the media type (name of parameter always lower case). Example: {charset: 'utf-8'}

Throws a TypeError if the string is missing or invalid.

var obj = contentType.parse(req)

Parse the content-type header from the given req. Short-cut for contentType.parse(req.headers['content-type']).

Throws a TypeError if the Content-Type header is missing or invalid.

var obj = contentType.parse(res)

Parse the content-type header set on the given res. Short-cut for contentType.parse(res.getHeader('content-type')).

Throws a TypeError if the Content-Type header is missing or invalid.

var str = contentType.format({type: 'image/svg+xml'})

Format an object into a content type string. This will return a string of the content type for the given object with the following properties (examples are shown that produce the string 'image/svg+xml; charset=utf-8'):

• type: The media type (will be lower-cased). Example: 'image/svg+xml'

• parameters: An object of the parameters in the media type (name of the parameter will be lower-cased). Example: {charset: 'utf-8'}

Throws a TypeError if the object contains an invalid type or parameter names.

MIT