title: OPA: the HttpRequest.get_body() is not working
body: <p>I am testing a opa example for REST call on Mac os X 10.8.2  + OPA 1.0.7 + node.js v0.8.14.</p>
  
  <p>first, I follow the example :
       <a href="https://github.com/cedricss/ian-oliver-tutorials/blob/master/tutorial4.opa" rel="nofollow">https://github.com/cedricss/ian-oliver-tutorials/blob/master/tutorial4.opa</a></p>
  
  <p>Using [ CURL -d "posted data"  localhost:8080/expressions  ] to  test post call, I found  the HttpRequest.get_body() is not working, and the server is not response,  but  the get call is working.
  I commented HttpRequest.get_body() invoking, the server is working. </p>
  
  <p>Then, I follow the OPA's site example:</p>
  
  <pre><code>  https://github.com/MLstate/opalang/wiki/Hello%2C-web-services
  </code></pre>
  
  <p>the same problems,  and  invoke  HttpRequest.get_form_data()  is not working , 
  to invoke HttpRequest.getURI() is working.</p>
  
  <p>I don't know where is wrong, Thanks a lot.</p>