Spring RestTemplate with Support for Connecting to https with selfsigned Certificates (ApacheHTTPClient >= 4.4) and ByteArrays in Responses

RestTemplateConfig.java

import java.util.ArrayList;
import java.util.List;

import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.springframework.http.MediaType;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.http.converter.ByteArrayHttpMessageConverter;
import org.springframework.web.client.RestTemplate;

public class RestTemplateConfig {
	
	public static RestTemplate initRestTemplateForPdfAsByteArrayAndSelfSignedHttps() {
		RestTemplate restTemplate = new RestTemplate(useApacheHttpClientWithSelfSignedSupport());
		restTemplate.getMessageConverters().add(generateByteArrayHttpMessageConverter());
		return restTemplate;
	}

	private static HttpComponentsClientHttpRequestFactory useApacheHttpClientWithSelfSignedSupport() {
		CloseableHttpClient httpClient = HttpClients.custom().setSSLHostnameVerifier(new NoopHostnameVerifier()).build();
		HttpComponentsClientHttpRequestFactory useApacheHttpClient = new HttpComponentsClientHttpRequestFactory();
		useApacheHttpClient.setHttpClient(httpClient);
		return useApacheHttpClient;
	}

	private static ByteArrayHttpMessageConverter generateByteArrayHttpMessageConverter() {
		ByteArrayHttpMessageConverter byteArrayHttpMessageConverter = new ByteArrayHttpMessageConverter();

		List<MediaType> supportedApplicationTypes = new ArrayList<MediaType>();
		supportedApplicationTypes.add(new MediaType("application","pdf"));
		byteArrayHttpMessageConverter.setSupportedMediaTypes(supportedApplicationTypes);
		return byteArrayHttpMessageConverter;
	}
}