Weekly downloads
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Manipulate the HTTP Vary header
This is a Node.js module available through the
npm registry. Installation is done using the
npm install
command:
$ npm install vary
var vary = require('vary')
Adds the given header field
to the Vary
response header of res
.
This can be a string of a single field, a string of a valid Vary
header, or an array of multiple fields.
This will append the header if not already listed, otherwise leaves it listed in the current location.
// Append "Origin" to the Vary header of the response
vary(res, 'Origin')
Adds the given header field
to the Vary
response header string header
.
This can be a string of a single field, a string of a valid Vary
header,
or an array of multiple fields.
This will append the header if not already listed, otherwise leaves it listed in the current location. The new header string is returned.
// Get header string appending "Origin" to "Accept, User-Agent"
vary.append('Accept, User-Agent', 'Origin')
var http = require('http')
var vary = require('vary')
http.createServer(function onRequest (req, res) {
// about to user-agent sniff
vary(res, 'User-Agent')
var ua = req.headers['user-agent'] || ''
var isMobile = /mobi|android|touch|mini/i.test(ua)
// serve site, depending on isMobile
res.setHeader('Content-Type', 'text/html')
res.end('You are (probably) ' + (isMobile ? '' : 'not ') + 'a mobile user')
})
$ npm test
FAQs
Manipulate the HTTP Vary header
The npm package vary receives a total of 24,399,194 weekly downloads. As such, vary popularity was classified as popular.
We found that vary demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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