Code snippet to get a conversion rate

Abstract

This code snippet fetches a currency conversion rate.

Logic

Initialize a new HTTPbuilder, use the common request types and get the response.

Snippet

import groovyx.net.http.HTTPBuilder
import static groovyx.net.http.Method.GET
import static groovyx.net.http.ContentType.JSON
 
// initialize a new builder and give a default URL
def http = new HTTPBuilder("<URL>")
 
http.request(GET,JSON) { req ->
 
  response.success = { resp, reader ->
    assert resp.status == 200
    reader.<id>.val
  }
 
  // called only for a 404 (not found) status code:
  response.'404' = { resp ->
    println 'Not found'
  }
}

Placeholders

Placeholder	Description	Example
`<URL`>	URL	http://free.currencyconverterapi.com/api/v5/convert?q=EUR_USD&compact=y
`<id>`	The conversion Id	`EUR_USD`

Context

The outcome of the code snippet is a BigDecimal. You could use this code, for example, to convert currency from one to another.

Reference

HTTPBuilder
Groovy Documentation

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