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Manipulate the HTTP Vary header
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jshttp/vary
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Manipulate the HTTP Vary header
This is aNode.js module available through thenpm registry. Installation is done using thenpm install command:
$ npm install vary
varvary=require('vary')
Adds the given headerfield to theVary response header ofres.This can be a string of a single field, a string of a validVaryheader, or an array of multiple fields.
This will append the header if not already listed, otherwise leavesit listed in the current location.
// Append "Origin" to the Vary header of the responsevary(res,'Origin')
Adds the given headerfield to theVary response header stringheader.This can be a string of a single field, a string of a validVary header,or an array of multiple fields.
This will append the header if not already listed, otherwise leavesit 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')
varhttp=require('http')varvary=require('vary')http.createServer(functiononRequest(req,res){// about to user-agent sniffvary(res,'User-Agent')varua=req.headers['user-agent']||''varisMobile=/mobi|android|touch|mini/i.test(ua)// serve site, depending on isMobileres.setHeader('Content-Type','text/html')res.end('You are (probably) '+(isMobile ?'' :'not ')+'a mobile user')})
$ npmtestAbout
Manipulate the HTTP Vary header