NiFi - Extract attributes from JSON as argument in InvokeHTTP Processor

[#1]

I'm trying to load weather data as http API request. Therefore I need to extract the geo information from an incoming JSON flowfile. This is my JSON data

{
  "id" : 590575476,
  "sampling_rate" : null,
  "timestamp" : "2017-12-19 13:23:20",
  "location" : {
    "id" : 1311,
    "latitude" : "47.967",
    "longitude" : "7.959",
    "country" : "DE"
  },
  "sensor" : {
    "id" : 2602,
    "pin" : "1",
    "sensor_type" : {
      "id" : 14,
      "name" : "SDS011",
      "manufacturer" : "Nova Fitness"
    }
  },
  "sensordatavalues" : [ {
    "id" : 1291686812,
    "value" : "25.87",
    "value_type" : "P1"
  }, {
    "id" : 1291686813,
    "value" : "15.63",
    "value_type" : "P2"
  } ]
}

Any idea how to access latitude and longitude as attributes for the URL in the InvokeHTTP processor?

http://api.openweathermap.org/data/2.5/weather?lat=${location.latitude}&lon=${location.longitude}&AP...

[#2 · Accepted solution]

@Lukas Müller

Use EvaluateJSON path processor with below configs:-

then we are adding longitude and latitude attributes to the flowfile as

then use url in invoke http processor as

http://api.openweathermap.org/data/2.5/weather?lat=${location.latitude}&lon=${location.longitude}&AP...

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