// This node.js example wraps the result of running "ps -a" in HTML<\/span>\n// and serves it at localhost:8080. It uses a meta tag<\/span>\n// to refresh the display every 5 seconds.<\/span>\n\nvar<\/span> sys<\/span> =<\/span> require<\/span>(<\/span>'sys'<\/span>),<\/span> \nhttp<\/span> =<\/span> require<\/span>(<\/span>'http'<\/span>),<\/span>\ncommand<\/span> =<\/span> "ps -a"<\/span>;<\/span>\n\nfunction<\/span> buildHtml<\/span>(<\/span>str<\/span>)<\/span> {<\/span>\n  var<\/span> head<\/span> =<\/span> '<head><meta http-equiv="refresh" content="5"></head>'<\/span>;<\/span>\n  var<\/span> body<\/span> =<\/span> '<body><pre>'<\/span> +<\/span> str<\/span> +<\/span> '</pre></body>'<\/span>;<\/span>\n  return<\/span> [<\/span>'<html>'<\/span>,<\/span> head<\/span>,<\/span> body<\/span>,<\/span> '</html>'<\/span>].<\/span>join<\/span>(<\/span>'\\n'<\/span>);<\/span>\n}<\/span>\n\nhttp<\/span>.<\/span>createServer<\/span>(<\/span>function<\/span>(<\/span>req<\/span>,<\/span> res<\/span>)<\/span> {<\/span>\n  sys<\/span>.<\/span>exec<\/span>(<\/span>command<\/span>).<\/span>addCallback<\/span>(<\/span>function<\/span> (<\/span>stdout<\/span>,<\/span> stderr<\/span>)<\/span> {<\/span>\n    res<\/span>.<\/span>sendHeader<\/span>(<\/span>200<\/span>,<\/span> {<\/span>'Content-Type'<\/span>:<\/span> 'text/html'<\/span>});<\/span>\n    res<\/span>.<\/span>sendBody<\/span>(<\/span>buildHtml<\/span>(<\/span>stdout<\/span>));<\/span>\n    res<\/span>.<\/span>finish<\/span>();<\/span>\n  });<\/span>\n}).<\/span>listen<\/span>(<\/span>8080<\/span>);<\/span>\n\nsys<\/span>.<\/span>puts<\/span>(<\/span>'Server running at http://127.0.0.1:8080/'<\/span>);<\/span>\n<\/pre><\/div>\n