package com.xkrs.utils;

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
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.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.entity.StringEntity;
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.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

/**
 * http工具类
 */
public class HttpClientUtils {

    private static final Logger log = LoggerFactory.getLogger(HttpClientUtils.class);

    /**
     * 发送http+get请求
     *
     * @param url
     * @return 返回结果
     * @throws Exception
     */
    public static String sendHttpGet(String url) throws Exception {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        return doGet(url, httpClient);
    }

    /**
     * 发送https+get请求，绕过证书
     *
     * @param url 请求地址
     * @return 返回结果
     * @throws Exception
     */
    public static String sendHttpsGet(String url) throws Exception {
//        CloseableHttpClient httpClient = createIgnoreVerifyHttpClient();
        //CloseableHttpClient httpClient = HttpClients.createDefault();
        SSLConnectionSocketFactory scsf = new SSLConnectionSocketFactory(SSLContexts.custom().loadTrustMaterial(null, new TrustSelfSignedStrategy()).build(), NoopHostnameVerifier.INSTANCE);
        CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(scsf).build();
        return doGet(url, httpClient);
    }

    /**
     * 发送http+post请求
     *
     * @param url    请求地址
     * @param params 请求参数 json字符串
     * @return 返回结果
     * @throws Exception
     */
    public static String sendHttpPost(String url, String params) throws Exception {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        return doPost(httpClient, url, params);
    }

    public static String sendHttpPostTextPlain(String url, String params) throws Exception {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        return doPostTextPlain(httpClient, url, params);
    }

    private static String doPostTextPlain(CloseableHttpClient httpClient, String url, String params) throws Exception {
        log.info("Post请求url：{}", url);
        log.info("Post请求params：{}", params);
        HttpPost httpPost = new HttpPost(url);
        httpPost.addHeader("Content-Type", "application/json; charset=utf-8");
        StringEntity requestEntity = new StringEntity(params, "UTF-8");
        requestEntity.setContentType("text/plain");
        requestEntity.setContentEncoding("UTF-8");
        httpPost.setEntity(requestEntity);
        return execute(httpClient, httpPost);
    }

    /**
     * 发送https+post请求
     *
     * @param url    请求地址
     * @param params 请求参数 json字符串
     * @return 返回结果
     * @throws Exception
     */
    public static String sendHttpsPost(String url, String params) throws Exception {
        // CloseableHttpClient httpClient = createIgnoreVerifyHttpClient();
        // CloseableHttpClient httpClient = null;
        SSLConnectionSocketFactory scsf = new SSLConnectionSocketFactory(SSLContexts.custom().loadTrustMaterial(null, new TrustSelfSignedStrategy()).build(), NoopHostnameVerifier.INSTANCE);
        CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(scsf).build();
        // CloseableHttpClient httpClient = HttpClients.createDefault();
        return doPost(httpClient, url, params);

    }

    /**
     * 封装get请求方式的处理
     */
    private static String doGet(String url, CloseableHttpClient httpClient) throws Exception {
        log.info("HGet请求url={}", url);
        HttpGet httpGet = new HttpGet(url);
        return execute(httpClient, httpGet);
    }

    /**
     * 封装post请求方式的处理
     */
    private static String doPost(CloseableHttpClient httpClient, String url, String params) throws Exception {
        log.info("Post请求url：{}", url);
        log.info("Post请求params：{}", params);
        HttpPost httpPost = new HttpPost(url);
        httpPost.addHeader("Content-Type", "application/json; charset=utf-8");
        httpPost.setEntity(new StringEntity(params));
        return execute(httpClient, httpPost);
    }

    /**
     * 执行发送
     */
    private static String execute(CloseableHttpClient httpClient, HttpRequestBase requestBase) throws Exception {
        String result = null;
        CloseableHttpResponse response = null;
        try {
            response = httpClient.execute(requestBase);
            int statusCode = response.getStatusLine().getStatusCode();
            log.info("HttpClient响应码={}", statusCode);
            final int success = 200;
            if (statusCode == success) {
                result = EntityUtils.toString(response.getEntity(), "utf-8");
            } else {
                log.error("HttpClient请求失败，错误码={}", statusCode);
            }
        } catch (Exception e) {
            log.error("HttpClient请求异常：", e);
        } finally {
            if (null != httpClient) {
                httpClient.close();
            }
            if (null != response) {
                response.close();
            }
        }
        log.info("HttpClient请求结果：{}", result);
        return result;
    }

    /**
     * 绕过验证
     *
     * @return
     * @throws NoSuchAlgorithmException
     * @throws KeyManagementException
     */
    public static CloseableHttpClient createIgnoreVerifyHttpClient() throws Exception {
        SSLContext sslContext = SSLContext.getInstance("TLS");
        // 实现一个X509TrustManager接口
        X509TrustManager trustManager = new X509TrustManager() {
            @Override
            public void checkClientTrusted(X509Certificate[] paramArrayOfX509Certificate, String paramString) throws CertificateException {
            }

            @Override
            public void checkServerTrusted(X509Certificate[] paramArrayOfX509Certificate, String paramString) throws CertificateException {
            }

            @Override
            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }
        };
        sslContext.init(null, new TrustManager[]{trustManager}, null);
        Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create().register("http", PlainConnectionSocketFactory.INSTANCE).register("https", new SSLConnectionSocketFactory(sslContext)).build();
        PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry);
        CloseableHttpClient httpClient = HttpClients.custom().setConnectionManager(connManager).build();
        return httpClient;
    }

}