simple mock server

mock_server.js

/** mock server */
var http = require('http')
  , url  = require('url')
  , util = require('util')
  ;

var dummy = function(){
  return '{"hoge":1}';
};

/*
*  object format
*   '/foo' : {
*       code : response code,
*       type : content-type
*       body : function_name 
*   }
*
*/
var URL_MAPPING = {
  '/hoge': {
    type: 'application/json',
    body : dummy
  },
  '/fuga': {
    type: 'application/json',
    body: function() { 
      var hoge = {
        a : 1, b:2
      };
      return JSON.stringify(hoge);
    }
  }
};

var server = http.createServer(function(req, res) {
  var requestURL = url.parse(req.url);
  var mapping = URL_MAPPING[requestURL.pathname];
  
  if(!mapping){
    res.writeHead(500, {'Content-Type':'text/plain; charset=utf-8'});
    res.write('undefined method');
  } else {
    var body = mapping['body']
      , bodyType = typeof body
      , responseBody = ''
      , responseCode = mapping.code || 200
      , contentType = mapping.type || 'text/plain'
      ;

    if(bodyType === 'function'){
      responseBody = body();
    } else if(bodyType === 'object'){
      contentType = mapping.type || 'application/json';
      responseBody = JSON.stringify(body);
    } else {
      responseBody = body;
    }
    res.writeHead(responseCode, {'Content-Type': contentType + '; charset=utf-8', 'Content-Length':Buffer.byteLength(responseBody,'utf-8')});
    res.write(responseBody);
  }
  res.end();
});


server.listen(process.argv[2] || 3000);