Making API Call and Processing Result

Making API calls with Groovy script and processing results, transmitting response data to backend as header, URL parameter or body

Groovy Script

import groovy.json.JsonSlurper

def location = 'Stockholm, Sweden'
def connection = new URL("https://query.yahooapis.com/v1/public/yql?q=" + 
    URLEncoder.encode("select item " +
    "from weather.forecast where woeid in " +
    "(select woeid from geo.places(1) " +
    "where text='$location')", 'UTF-8' ) )
    .openConnection() as HttpURLConnection

// set some headers
connection.setRequestProperty( 'User-Agent', 'groovy-2.4.4' )
connection.setRequestProperty( 'Accept', 'application/json' )

if ( connection.responseCode == 200 ) {
    // get the JSON response
    def json = connection.inputStream.withCloseable { inStream ->
        new JsonSlurper().parse( inStream as InputStream )
    }
    
    // extract some data from the JSON, printing a report
    def item = json.query.results.channel.item
    
    requestHeaderMapToTargetAPI.put("title",item.title)
    requestHeaderMapToTargetAPI.put("Temperature","${item.condition?.temp}")
    requestHeaderMapToTargetAPI.put("Condition","${item.condition?.text}")
    
    requestUrlParamMapToTargetAPI.put("title",item.title)
    requestUrlParamMapToTargetAPI.put("Temperature","${item.condition?.temp}")
    requestUrlParamMapToTargetAPI.put("Condition","${item.condition?.text}")
    
    bodyText= 'title:'+ item.title + ', temp:' + "${item.condition?.temp}" + ", text:" + "${item.condition?.text}"
    
    // show some forecasts
    def forecast= 'Forecasts:'
    item.forecast.each { f ->
        forecast += ' * ${f.date} - Low: ${f.low}, High: ${f.high}, Condition: ${f.text}'
    }
} else {
    requestHeaderMapToTargetAPI.put("responseCode",connection.responseCode)
    requestHeaderMapToTargetAPI.put("responseText",connection.inputStream.text)
    requestUrlParamMapToTargetAPI.put("responseCode",connection.responseCode)
    requestUrlParamMapToTargetAPI.put("responseText",connection.inputStream.text)
    bodyText='title:'+ item.title + ', code:' + connection.responseCode +", text:" + connection.inputStream.text
}

Explanation

This script performs the following operations:

1. API Call: Makes HTTP request to Yahoo Weather API
2. JSON Parse: Parses JSON response
3. Data Extraction: Extracts weather information
4. Data Transmission: Transmits this information to backend as header, URL parameter, or body
5. Error Management: Transmits error information in case of error

This script should be run on the request line (Request Policy) because it uses the requestHeaderMapToTargetAPI and requestUrlParamMapToTargetAPI variables.