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Nodejs server with site index fallback

/ Published in: JavaScript
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Gives you an idea of how to fallback to an 'index' page if URL points to a directory. Not very refined - Will never return a "is directory" error

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  1. var sys = require("sys"),
  2.     http = require("http"),
  3.     url = require("url"),
  4.     path = require("path"),
  5.     fs = require("fs");
  6.  
  7. http.createServer(function(request, response) {
  8.     var uri = url.parse(request.url).pathname;
  9.     var filename = path.join(process.cwd(), uri);
  10.     var req = false;
  11.  
  12.     path.exists(filename, function(exists) {
  13.     	if(!exists) {
  14.     		response.writeHead(404, {"Content-Type": "text/plain"});
  15.     		response.write("404 Not Found\n");
  16.     		response.end();
  17.     		return;
  18.     	}
  19.  
  20.     	fs.readFile(filename, "binary", function(err, file) {
  21.     		if(err) {
  22.     			//If is directory, fallback to 'site index'
  23.     			if(err.errno == 21) {
  24.     				req = http.request({host:'localhost',port:8080,path:'/hub.html',method:'GET'}, function(res) {
  25.     					res.on('data', function(chunk) { 
  26.       						response.writeHead(200);
  27.     						response.write(chunk, 'binary'); //vs response.write(''+chunk); to cast as String
  28.     						response.end();
  29.     					});
  30.     				});
  31.     				req.end();
  32.     				return;
  33.     			}
  34.  
  35.     			response.writeHead(500, {"Content-Type": "text/plain"});
  36.     			response.write(err + "\n");
  37.     			response.end();
  38.     			return;
  39.     		}
  40.  
  41.     		response.writeHead(200);
  42.     		response.write(file, "binary");
  43.     		response.end();
  44.     	});
  45.     });
  46. }).listen(8080);
  47.  
  48. sys.puts("Server running at http://localhost:8080/");

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