Created
October 28, 2010 12:12
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send different content based on sideloaded javascript
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| var urls = {} | |
| require( "http" ).createServer( function( req, res ) { | |
| var url = req.url, timeout | |
| if ( url == "/favicon.ico" ) return res.writeHead( 404 ), res.end() | |
| if ( url in urls ) return urls[ url ]( req, res ) | |
| url = "/vapor.js?" + Math.floor( Math.random() * 0xcfd41b9100000 ).toString( 36 ) | |
| urls[ url ] = function( req, response ) { | |
| // this is called if the user agent has javascript enabled | |
| clearTimeout( timeout ) | |
| delete urls[ url ] | |
| res.end( "<script>document.body.innerHTML = 'rendered by js'</script></body></html>" ) | |
| response.writeHead( 204, { "Content-Type": "text/javascript" } ) | |
| response.end( "" ) // Copyright (c) 2010 Thomas Fuchs | |
| } | |
| timeout = setTimeout( function() { | |
| // this is called if the user agent does not have javascript enabled | |
| delete urls[ url ] | |
| res.end( "rendered by html</body></html>" ) | |
| }, 1000 ) | |
| res.writeHead( 200, { "Content-Type": "text/html" } ) | |
| res.write( "<html><body><script src='" + url + "'></script>" ) | |
| }).listen( 4011 ) |
for some reason this only works in firefox... any ideas why?
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3a. if the script is not fetched within 1 second, server writes html and ends
3b. if the script is fetched within 1 second, server writes javascript and ends