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<scxml datamodel="ecmascript">
<script src="http://uscxml.tk.informatik.tu-darmstadt.de/scripts/dump.js" />
<state id="start">
<!--
I went for explicit invokers instead of a response element in executable content
as it provides better control on the path where to serve data.
-->
<invoke type="httpserver" id="servlet.data">
<!-- server path where to listen -->
<param name="path" expr="'data'" />
<!-- the name of events originating from requests at this url -->
<param name="callback" expr="'http.data'" />
</invoke>
<invoke type="httpserver" id="servlet.exit">
<param name="path" expr="'exit'" />
<param name="callback" expr="'http.exit'" />
</invoke>
<state id="loop">
<transition event="http.data" target="loop">
<script>
dump(_event);
</script>
<!-- Sending a http reply is to send the invoker id a "reply.<requestId>" event -->
<send target="#_servlet.data" eventexpr="'reply.' + _event.data.reqId">
<!-- This will end up as a header field -->
<param name="Foo" expr="_ioprocessors" />
<!-- JSON string in the content -->
<content expr="_ioprocessors" />
</send>
</transition>
<transition event="http.exit" target="final">
<script>
dump(_event);
</script>
<!-- This will never get delivered as we terminate before -->
<send target="#_servlet.exit" eventexpr="'reply.' + _event.data.reqId" />
</transition>
</state>
</state>
<final id="final" />
</scxml>
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