old_contents: var express = require('express');
  var router = express.Router();
  var redis = require('redis');
  
  client = redis.createClient();
  
  /* GET users listing. */
  router.post('/', function(req, res, next) {
    client.get(req.body.id, function(err, reply){
      if(err){throw err;}
      else if(!reply){
        var json = {
          name: req.body.name,
          mail: req.body.mail,
          tell: req.body.tell,
          twitter: req.body.twitter,
          image: req.body.image
        };
        if(!json.mail || !json.name || !req.body.id || !req.body.image){res.send("luck params");return;}
        client.set(req.body.id, JSON.stringify(json), function(err, keys_replies){
          if(err){throw err;}
          else{res.send(req.body.name + " is registered.");return;}
          return;
        });
      }
      else{res.send("already registered.");return;}
    });
  });
  
  module.exports = router;
  
new_contents: var express = require('express');
  var router = express.Router();
  var redis = require('redis');
  
  client = redis.createClient();
  
  /* GET users listing. */
  router.post('/', function(req, res, next) {
    client.get(req.body.id, function(err, reply){
      if(err){throw err;}
      else if(!reply){
        var json = {
          name: req.body.name,
          mail: req.body.mail,
          tell: req.body.tell,
          twitter: req.body.twitter,
          image: req.body.image,
          comment: req.body.comment
        };
        if(!json.mail || !json.name || !req.body.id || !req.body.image){res.send("luck params");return;}
        client.set(req.body.id, JSON.stringify(json), function(err, keys_replies){
          if(err){throw err;}
          else{res.send(req.body.name + " is registered.");return;}
          return;
        });
      }
      else{res.send("already registered.");return;}
    });
  });
  
  module.exports = router;
  
subject: add comment