title: Configure app yaml to serve JSON files out of static directories
body: <p>I configured my app.yaml like this:</p>
  
  <pre><code>- url: /data
    static_dir: templates/data
    http_headers:
      Content-Type: application/json
  </code></pre>
  
  <p>As seen here at <a href="https://developers.google.com/appengine/docs/python/config/appconfig" rel="nofollow">GAE config yaml</a></p>
  
  <p>I do an AJAX request to get the JSON;
  I have a 1KB "sic.json" there, properly formed (I checked...)</p>
  
  <p>When I run <a href="https://developers.google.com/appengine/docs/python/tools/devserver" rel="nofollow">dev_appserver</a>, 
  Using Chrome developer tools, I see the return response as type:</p>
  
  <pre><code>Content-Type:application/octet-stream
  </code></pre>
  
  <p>When I retrieve these results in jQuery/Javascript, the string is not recognized as JSON;
  if forces me to use JSON.Parse first...</p>
  
  <p>But when I actually deploy, the app yaml configuration seems to work; it serves the static file as JSON so JSON.Parse is unnecessary...</p>
  
  <p>Should I expect this, that dev_appserver doesn't do the same as live deployment as far as serving http_headers for files?</p>