groovy @Grab('org.apache.httpcomponents:httpclient:4.5.13') import org.apache.http.HttpEntity import org.apache.http.client.HttpClient import org.apache.http.client.methods.HttpGet import org.apache.http.impl.client.HttpClientBuilder import org.apache.http.util.EntityUtils HttpClient httpClient = HttpClientBuilder.create().build() HttpGet httpGet = new HttpGet('https://www.example.com') HttpResponse httpResponse = httpClient.execute(httpGet) HttpEntity entity = httpResponse.getEntity() String responseString = EntityUtils.toString(entity) println responseString