<p></p>
<p dir="auto">Well that URL is not an API so it's not up to the user to provide arbitrary input so we don't try very hard to validate it.</p>
<p dir="auto">What actually happens is that we call <code class="notranslate">trace_data_url(params[:gpx], :format => :xml)</code> to generate a URL to pass to the underlying iD instance and that throws an exception because rails expects the first parameter to be a trace object ID and it isn't.</p>
<p dir="auto">Now sure I could write a bunch of code to validate it first and return 400 instead of 500 and the average user gains what from that? Pretty much nothing really.</p>

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