Thanks for the replies. I think I&#39;ve not explained myself well.<div><br></div><div>I don&#39;t expect the backtrace to be shown or any internal error in production mode, but I do need to be able to pass back to users of the system some meaningful message on why their called failed. </div>

<div><br></div><div>Such as &quot;Sorry we have experienced a system failure - please try again later. Your problem has need reported&quot; for a 500, or &quot;Sorry you have not sent the mandatory argument &#39;type&#39;&quot; or &quot;Sorry, the argument &#39;ditsance&#39; is not understood.&quot; for a 400.</div>

<div><br></div><div>How do I get such messages back to the caller, be it a web page, or most problematically a RESTful user using JSON and still re ponded with a meaningful code. </div><div><br></div><div>I could catch all errors, and send back a nice HTML or JSON object, but my response would be a 200 which seems wrong.</div>

<div><br></div><div>At present the poor user can not tell why his requests are failing.</div><div><br></div><div>thanks again for an guidance.</div><div><br></div><div>Stephen</div><div><br><br><div class="gmail_quote">On Thu, Jul 7, 2011 at 3:04 PM, Flavio Poletti <span dir="ltr">&lt;<a href="mailto:polettix@gmail.com">polettix@gmail.com</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">I would also add that this choice is wise, because showing such internal info to the end user in a production environment is likely to be frown during a security audit.<div>

<br></div><div>Of course this is a general statement that does not take into account what Stephen might have read about how RESTful apps should respond to errors, but I would be surprised of the contrary.<div>

<br></div><div>Cheers,</div><div><br></div><div><font color="#888888">    Flavio.</font><div><div></div><div class="h5"><br><div><br><br><div class="gmail_quote">On Thu, Jul 7, 2011 at 1:44 PM, Takeshi OKURA <span dir="ltr">&lt;<a href="mailto:okura3@gmail.com" target="_blank">okura3@gmail.com</a>&gt;</span> wrote:<br>



<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Stephen.<br>
<br>
2011/7/7 Stephen Fenwick-Paul &lt;<a href="mailto:stephen@activeg.org" target="_blank">stephen@activeg.org</a>&gt;:<br>
<div>&gt; With the environment set to development, each of these responds as I expect.<br>
&gt; Case 1 gives me a full backtrace, case 2 gives me a a json with just the<br>
&gt; error message, and case 3 again give me a full backtrace,<br>
&gt; Now moving to the production environment. I get<br>
</div>(snip)<br>
<div>&gt; Which is OK, but where is the meaningful message to the user gone?<br>
<br>
</div>To show the stack trace, show_errors variable in a<br>
environment/production.yml shuld be 1. I think so.<br>
<br>
It&#39;s 1 in development.yml. But in production.yml It&#39;s 0.<br>
<br>
best regards.<br>
<font color="#888888"><br>
--<br>
Takeshi OKURA<br>
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