JS policy config for fire-and-forget logging to Splunk

JS-Log-To-Splunk.xml

<Javascript name='JS-Log-To-Splunk' timeLimit='2200'>
  <!--
      timeLimit = 2200 to allow for waiting for Splunk to respond.
      This is necessary only during diagnostic efforts.
      See the KVM entry "splunk_await_response". In normal
      cases, the JS logic does not wait for a response.
  -->
  <Properties>
    <Property name='authz_header'>Splunk {splunk_hec_token}</Property>
    <!--
    "host" : "apigeeedgehost",
    "sourcetype" : "something",
    -->
    <Property name='payload'>{
    "source" : "apigeeedge",
    "event" : {
      "apigeeedge.org" : "{organization.name}",
      "apigeeedge.env" : "{environment.name}",
      "request.path" : "{request.path}",
      "apiproxy" : "{apiproxy.name}",
      "apiproxy.revision" : {apiproxy.revision},
      "apiproxy.endpoint" : "{proxy.name}",
      "messageid" : "{messageid}",
      "apiproduct.name" : "{apiproduct.name}",
      "developer.app.name" : "{developer.app.name}",
      "developer.id" : "{developer.id}",
      "developer.email" : "{developer.email}",
      "client_id" : "{client_id}",
      "request_length" : "{request.header.content-length}",
      "response_length" : "{response.header.content-length}",
      "target_elapsed" : "{time_target_elapsed}",
      "total_elapsed" : "{time_total_elapsed}"
    }
}</Property>
    <Property name='endpoint'>{splunk_target}/services/collector/event</Property>
  </Properties>
  <ResourceURL>jsc://log-To-Splunk.js</ResourceURL>
</Javascript>