A simple server written in node.

.simple_echo_server

function simple_server {
  NODE_PATH=$(which npm |sed -e 's/bin\/npm/lib\/node_modules/')

  if [[ $(npm --depth 0 --parseable=true list express 2>/dev/null) = '' ]]; then
    npm install -g express 2>/dev/null 1>/dev/null;
  fi

  if [[ $(npm --depth 0 --parseable=true list json-stringify-safe 2>/dev/null) = '' ]]; then
    npm install -g json-stringify-safe 2>/dev/null 1>/dev/null;
  fi

  node -e "require('express')()\
    .disable('etag')\
    .all('*',\
    function(r,p){\
      var s;
      try{\
        s = require('json-stringify-safe')(r);\
        p.type('json');\
        p.send(s);\
      }
      catch (e){\
        console.log(e);\
        s = e;\
      }\
    })\
    .listen(3030,function(){\
      console.log('Server started on http://localhost:3030');\
    });"
}