public static HttpClientBuilder builder(
		HttpEnvironmentRepositoryProperties environmentProperties)
		throws GeneralSecurityException {
	SSLContextBuilder sslContextBuilder = new SSLContextBuilder();
	HttpClientBuilder httpClientBuilder = HttpClients.custom();

	if (environmentProperties.isSkipSslValidation()) {
		sslContextBuilder.loadTrustMaterial(null, (certificate, authType) -> true);
		httpClientBuilder.setSSLHostnameVerifier(new NoopHostnameVerifier());
	}

	if (!CollectionUtils.isEmpty(environmentProperties.getProxy())) {
		ProxyHostProperties httpsProxy = environmentProperties.getProxy()
				.get(ProxyHostProperties.ProxyForScheme.HTTPS);
		ProxyHostProperties httpProxy = environmentProperties.getProxy()
				.get(ProxyHostProperties.ProxyForScheme.HTTP);

		httpClientBuilder
				.setRoutePlanner(new SchemeBasedRoutePlanner(httpsProxy, httpProxy));
		httpClientBuilder.setDefaultCredentialsProvider(
				new ProxyHostCredentialsProvider(httpProxy, httpsProxy));
	}
	else {
		httpClientBuilder.setRoutePlanner(
				new SystemDefaultRoutePlanner(ProxySelector.getDefault()));
		httpClientBuilder.setDefaultCredentialsProvider(
				new SystemDefaultCredentialsProvider());
	}

	int timeout = environmentProperties.getTimeout() * 1000;
	return httpClientBuilder.setSSLContext(sslContextBuilder.build())
			.setDefaultRequestConfig(RequestConfig.custom().setSocketTimeout(timeout)
					.setConnectTimeout(timeout).build());
}
 

protected SystemDefaultCredentialsProvider createCredentialsProvider() {
    return new SystemDefaultCredentialsProvider();
}