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Node - Basic Web Service
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node_basic_web_service.markdown

##Node - Basic Web Service

var util = require('util'),
http = require('http');

/*
/add/2/2 => 4
/sub/103/42 => 61
/mul/3/2 => 6
/div/100/25 => 4
*/

var operations = {
  add: function(a,b){return a + b},
sub: function(a,b){return a - b},
mul: function(a,b){return a * b},
div: function(a,b){return a / b}
}

http.createServer(function(req, res){
var parts = req.url.split("/"),
    op = operations[parts[1]],
    a = parseInt(parts[2],10),
    b = parseInt(parts[3],10);
    
var result = op ? op(a,b) : "Error";

util.puts(util.inspect(parts));
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end("" + result);
}).listen(3000, "127.0.0.1");

util.puts("Server running at http://127.0.0.1:3000/")
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