package com.ruoyi.common.utils.http;

import java.io.*;
import java.net.ConnectException;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.StandardCharsets;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import java.util.HashMap;
import java.util.Map;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.http.HttpEntity;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.utils.StringUtils;
import org.springframework.http.HttpRequest;
import org.springframework.util.CollectionUtils;
import org.springframework.web.multipart.MultipartFile;

/**
 * 通用http发送方法
 *
 * @author ruoyi
 */
public class HttpUtils
{
    private static final Logger log = LoggerFactory.getLogger(HttpUtils.class);

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url 发送请求的 URL
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url)
    {
        return sendGet(url, StringUtils.EMPTY);
    }

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param)
    {
        return sendGet(url, param, Constants.UTF8);
    }

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @param contentType 编码类型
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param, String contentType)
    {
        StringBuilder result = new StringBuilder();
        BufferedReader in = null;
        try
        {
            String urlNameString = StringUtils.isNotBlank(param) ? url + "?" + param : url;
            log.info("sendGet - {}", urlNameString);
            URL realUrl = new URL(urlNameString);
            URLConnection connection = realUrl.openConnection();
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            connection.connect();
            in = new BufferedReader(new InputStreamReader(connection.getInputStream(), contentType));
            String line;
            while ((line = in.readLine()) != null)
            {
                result.append(line);
            }
            log.info("recv - {}", result);
        }
        catch (ConnectException e)
        {
            log.error("调用HttpUtils.sendGet ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
            log.error("调用HttpUtils.sendGet SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
            log.error("调用HttpUtils.sendGet IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {
            log.error("调用HttpsUtil.sendGet Exception, url=" + url + ",param=" + param, e);
        }
        finally
        {
            try
            {
                if (in != null)
                {
                    in.close();
                }
            }
            catch (Exception ex)
            {
                log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
            }
        }
        return result.toString();
    }

    /**
     * 向指定 URL 发送POST方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param)
    {
        PrintWriter out = null;
        BufferedReader in = null;
        StringBuilder result = new StringBuilder();
        try
        {
            log.info("sendPost - {}", url);
            URL realUrl = new URL(url);
            URLConnection conn = realUrl.openConnection();
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("contentType", "utf-8");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            out = new PrintWriter(conn.getOutputStream());
            out.print(param);
            out.flush();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(), StandardCharsets.UTF_8));
            String line;
            while ((line = in.readLine()) != null)
            {
                result.append(line);
            }
            log.info("recv - {}", result);
        }
        catch (ConnectException e)
        {
            log.error("调用HttpUtils.sendPost ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
            log.error("调用HttpUtils.sendPost SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
            log.error("调用HttpUtils.sendPost IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {
            log.error("调用HttpsUtil.sendPost Exception, url=" + url + ",param=" + param, e);
        }
        finally
        {
            try
            {
                if (out != null)
                {
                    out.close();
                }
                if (in != null)
                {
                    in.close();
                }
            }
            catch (IOException ex)
            {
                log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
            }
        }
        return result.toString();
    }

    public static String sendPostBody(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        StringBuilder result = new StringBuilder();
        try
        {
            log.info("sendPost - {}", url);
            URL realUrl = new URL(url);
            URLConnection conn = realUrl.openConnection();
            conn.setRequestProperty("accept", "text/plain");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("contentType", "utf-8");
            conn.setRequestProperty("Content-Type", "application/json-patch+json");


            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setRequestProperty("Content-type", "application/json");
            out = new PrintWriter(conn.getOutputStream());
            out.print(param);
            out.flush();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(), StandardCharsets.UTF_8));
            String line;
            while ((line = in.readLine()) != null)
            {
                result.append(line);
            }
            log.info("recv - {}", result);
        }
        catch (ConnectException e){
            log.error("调用HttpUtils.sendPost ConnectException, url=" + url + ",param=" + param, e);
        }catch (SocketTimeoutException e){
            log.error("调用HttpUtils.sendPost SocketTimeoutException, url=" + url + ",param=" + param, e);
        }catch (IOException e){
            log.error("调用HttpUtils.sendPost IOException, url=" + url + ",param=" + param, e);
        }catch (Exception e){
            log.error("调用HttpsUtil.sendPost Exception, url=" + url + ",param=" + param, e);
        }finally{
            try{
                if (out != null){
                    out.close();
                }if (in != null){
                    in.close();
                }
            }catch (IOException ex){
                log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
            }
        }
        return result.toString();
    }

    public static String sendSSLFilePost(String url, Map<String, String> params, Map<String, File> files) throws NoSuchAlgorithmException, KeyManagementException {

        //HttpPost请求实体
        HttpPost httpPost = new HttpPost(url);
        //使用工具类创建 httpClient
        CloseableHttpClient client = HttpClients.createDefault();
        CloseableHttpResponse resp = null;
        String respondBody = null;
        try {
            //设置请求超时时间和 sockect 超时时间
            RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(200000).setSocketTimeout(200000000).build();
            httpPost.setConfig(requestConfig);
            //附件参数需要用到的请求参数实体构造器
            MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();
            System.out.println("0000000000000");
            if (!CollectionUtils.isEmpty(files)) {
                files.forEach((name, file) -> {
                    //附件参数,name对应请求参数的key值，file为文件
                    //添加文件参数，分隔符号会被自动设置，我们无须关注
                    multipartEntityBuilder.addBinaryBody(name,file);
                });
            }
            if (!CollectionUtils.isEmpty(params)) {
                params.forEach((key, value) -> {
                    //此处的字符串参数会被设置到请求体Query String Parameters中
                    multipartEntityBuilder.addTextBody(key, value);
                });
            }
            HttpEntity httpEntity = multipartEntityBuilder.build();
            //将请求参数放入 HttpPost 请求体中
            //使用 httpEntity 后 Content-Type会自动被设置成 multipart/form-data
            httpPost.setEntity(httpEntity);
            System.out.println("1111111111111");
            //执行发送post请求
            resp = client.execute(httpPost);
            System.out.println("222222222222222");
            //将返回结果转成String
            respondBody = EntityUtils.toString(resp.getEntity());
        } catch (IOException e) {
            //日志信息及异常处理
            String msg = "执行HTTP响应时抛出异常，需要关注";
            System.err.println(msg+e);
        } finally {
            if (resp != null) {
                try {
                    //关闭请求
                    resp.close();
                } catch (IOException e) {
                    System.err.println("关闭HTTP响应时抛出异常，需要关注"+e);
                }
            }
        }
        return respondBody;
    }


    /**
     * post方式请求服务器(https协议)
     *
     * @param url     求地址
     * @param content 参数
     * @return
     */
    public static String sendJsonToHttpsPost(String url, String content) {
        try {
            /*
             * 类HttpsURLConnection似乎并没有提供方法设置信任管理器。其实，
             * HttpsURLConnection通过SSLSocket来建立与HTTPS的安全连接
             * ，SSLSocket对象是由SSLSocketFactory生成的。
             * HttpsURLConnection提供了方法setSSLSocketFactory
             * (SSLSocketFactory)设置它使用的SSLSocketFactory对象。
             * SSLSocketFactory通过SSLContext对象来获得，在初始化SSLContext对象时，可指定信任管理器对象。
             */
            SSLContext sc = SSLContext.getInstance("SSL");
            sc.init(null, new TrustManager[]{new TrustAnyTrustManager()},
                    new java.security.SecureRandom());

            URL console = new URL(url);
            HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();
            conn.setSSLSocketFactory(sc.getSocketFactory());
            conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
            conn.setDoOutput(true);
            // 设置请求头
            conn.setRequestProperty("Accept", "text/plain");
            conn.setRequestProperty("Content-Type", "application/json-patch+json;charset=utf-8");
            conn.connect();
            DataOutputStream out = new DataOutputStream(conn.getOutputStream());
            out.write(content.getBytes(Constants.UTF8));
            // 刷新、关闭
            out.flush();
            out.close();
            InputStream is = conn.getInputStream();
            if (is != null) {
                ByteArrayOutputStream outStream = new ByteArrayOutputStream();
                byte[] buffer = new byte[1024];
                int len = 0;
                while ((len = is.read(buffer)) != -1) {
                    outStream.write(buffer, 0, len);
                }
                is.close();
                return new String(outStream.toByteArray(), Constants.UTF8);
            }
        } catch (Exception e) {
            log.info("JSON数据发送失败，异常：{}", e.getMessage());
            log.error("异常：", e);
        }
        return null;
    }


    public static String sendSSLPost(String url, String param)
    {
        StringBuilder result = new StringBuilder();
        String urlNameString = url + "?" + param;
        try
        {
            log.info("sendSSLPost - {}", urlNameString);
            SSLContext sc = SSLContext.getInstance("SSL");
            sc.init(null, new TrustManager[] { new TrustAnyTrustManager() }, new java.security.SecureRandom());
            URL console = new URL(urlNameString);
            HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();
            conn.setRequestProperty("accept", "text/plain");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("contentType", "utf-8");
            conn.setRequestProperty("Content-Type", "application/json-patch+json");

            conn.setDoOutput(true);
            conn.setDoInput(true);

            conn.setSSLSocketFactory(sc.getSocketFactory());
            conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
            conn.connect();
            InputStream is = conn.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String ret = "";
            while ((ret = br.readLine()) != null)
            {
                if (ret != null && !"".equals(ret.trim()))
                {
                    result.append(new String(ret.getBytes(StandardCharsets.ISO_8859_1), StandardCharsets.UTF_8));
                }
            }
            log.info("recv - {}", result);
            conn.disconnect();
            br.close();
        }
        catch (ConnectException e)
        {
            log.error("调用HttpUtils.sendSSLPost ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
            log.error("调用HttpUtils.sendSSLPost SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
            log.error("调用HttpUtils.sendSSLPost IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {
            log.error("调用HttpsUtil.sendSSLPost Exception, url=" + url + ",param=" + param, e);
        }
        return result.toString();
    }

    private static class TrustAnyTrustManager implements X509TrustManager
    {
        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType)
        {
        }

        @Override
        public void checkServerTrusted(X509Certificate[] chain, String authType)
        {
        }

        @Override
        public X509Certificate[] getAcceptedIssuers()
        {
            return new X509Certificate[] {};
        }
    }

    private static class TrustAnyHostnameVerifier implements HostnameVerifier
    {
        @Override
        public boolean verify(String hostname, SSLSession session)
        {
            return true;
        }
    }
}