import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import javax.net.ssl.SSLContext;

import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.LayeredConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.ssl.TrustStrategy;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.http.client.support.BasicAuthenticationInterceptor;
import org.springframework.web.client.RestTemplate;

@Value("${rest.read.timeout}")
private int readTimeout;

@Value("${rest.connect.timeout}")
private int connectTimeout;

@Value("${rest.connection.request.timeout}")
private int connectionRequestTimeout;

@Value("${rest.per.route}")
private int perRoute;

@Value("${rest.connection.total}")
private int maxTotal;

@Value("${rest.username}")
private String username;

@Value("${rest.password}")
private String password;

@Bean("wechatProxyRestTemplate")
public RestTemplate restTemplate(HttpComponentsClientHttpRequestFactory factory) {
    try {
        RestTemplate restTemplate = new RestTemplate(factory);
        restTemplate.getInterceptors().add(new BasicAuthenticationInterceptor(username, password));
        return restTemplate;
    } catch (Exception e) {
        throw new RuntimeException("Unable to initiate RestTemplate for access wechat-proxy.");
    }
}

@Bean
public HttpComponentsClientHttpRequestFactory httpComponentsClientHttpRequestFactory() throws KeyStoreException, NoSuchAlgorithmException, KeyManagementException {
    TrustStrategy acceptingTrustStrategy = (x509Certificates, authType) -> true;
    SSLContext sslContext = SSLContexts.custom().loadTrustMaterial(null, acceptingTrustStrategy).build();
    LayeredConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext, new NoopHostnameVerifier());

    Registry<ConnectionSocketFactory> sfr = RegistryBuilder.<ConnectionSocketFactory>create().register("http", PlainConnectionSocketFactory.getSocketFactory()).register("https", csf != null ? csf : SSLConnectionSocketFactory.getSocketFactory()).build();
    PoolingHttpClientConnectionManager pollingConnectionManager = new PoolingHttpClientConnectionManager(sfr);
    pollingConnectionManager.setMaxTotal(maxTotal);
    pollingConnectionManager.setDefaultMaxPerRoute(perRoute);

    CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(csf).setConnectionManager(pollingConnectionManager).build();
    HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
    factory.setHttpClient(httpClient);
    factory.setConnectTimeout(connectTimeout);
    factory.setReadTimeout(readTimeout);
    factory.setConnectionRequestTimeout(connectionRequestTimeout);

    return factory;
}