title: Node.js - "TypeError - res.setHeader is not a function"
body: <p>I'm trying to load JSON from a URL to a variable and send it back to the client's javascript</p>
  
  <pre><code>var getJSON =require('get-json');
  
  app.post('/json', function(req, res) {
      getJSON(url, function(err, res){
          if(err)
          {
             console.log(err);
          }
          else
          {
             res.setHeader('content-type', 'application/json');
             res.send(JSON.stringify({json: res.result}));
          }
      });
  });
  </code></pre>
  
  <p>Every time I run the code the server says that <code>res.setHeader</code> isn't a function and the rest breaks.</p>