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package com.nwd.log.utils;

import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
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.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

public class HttpsUtil {

    /**
     * @Auther: gengshuai@cetiti.com
     * @Description: 带参数GET请求
     * @Param: [url, param]
     * @Return: java.lang.String
     */
    public static String doGet(String url, Map<String, String> param) {
        // 创建Httpclient对象
        CloseableHttpClient httpclient = HttpClients.createDefault();

        String resultString = "";
        CloseableHttpResponse response = null;

        try {
            // 创建uri
            URIBuilder builder = new URIBuilder(url);
            if (param != null) {
                for (String key : param.keySet()) {
                    builder.addParameter(key, param.get(key));
                }
            }
            URI uri = builder.build();

            // 创建http GET请求
            HttpGet httpGet = new HttpGet(uri);

            // 执行请求
            response = httpclient.execute(httpGet);
            // 判断返回状态是否为200
            if (response.getStatusLine().getStatusCode() == 200) {
                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
                httpclient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return resultString;
    }

    /**
     * @Auther: gengshuai@cetiti.com
     * @Description: 带参数和请求头的GET请求
     * @Param: [url, param, header]
     * @Return: java.lang.String
     */
    public static String doGet(String url, Map<String, String> param, Map<String, String> header) {
        // 创建Httpclient对象
        CloseableHttpClient httpclient = HttpClients.createDefault();

        String resultString = "";
        CloseableHttpResponse response = null;
        try {
            // 创建uri
            URIBuilder builder = new URIBuilder(url);
            if (param != null) {
                for (String key : param.keySet()) {
                    builder.addParameter(key, param.get(key).toString());
                }
            }
            URI uri = builder.build();

            // 创建http GET请求
            HttpGet httpGet = new HttpGet(uri);

            if (header != null) {
                for (String key : header.keySet()) {
                    httpGet.setHeader(key, header.get(key).toString());
                }
            }

            // 执行请求
            response = httpclient.execute(httpGet);
            // 判断返回状态是否为200
            if (response.getStatusLine().getStatusCode() == 200) {
                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
                httpclient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return resultString;
    }

    /**
     * @Auther: gengshuai@cetiti.com
     * @Description: 无参GET请求
     * @Param: [url]
     * @Return: java.lang.String
     */
    public static String doGet(String url) {
        return doGet(url, null);
    }

    /**
     * @Auther: gengshuai@cetiti.com
     * @Description: application/x-www-form-urlencoded编码方式带参POST请求
     * @Param: [url, param]
     * @Return: java.lang.String
     */
    public static String doPost(String url, Map<String, String> param) {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String resultString = "";
        try {
            // 创建Http Post请求
            HttpPost httpPost = new HttpPost(url);
            // 创建参数列表
            if (param != null) {
                List<NameValuePair> paramList = new ArrayList();
                for (String key : param.keySet()) {
                    paramList.add(new BasicNameValuePair(key, param.get(key)));
                }
                // 模拟表单
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList,"utf-8");
                httpPost.setEntity(entity);
            }
            // 执行http请求
            response = httpClient.execute(httpPost);
            resultString = EntityUtils.toString(response.getEntity(), "utf-8");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                response.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

        return resultString;
    }

    public static void doPostFile(String url, Map<String, String> param, Map<String, String> header, HttpServletResponse response) {
        // 创建Httpclient对象
        HttpClient httpClient = HttpClientBuilder.create().build();
        try {
            // 创建Http Post请求
            HttpPost httpPost = new HttpPost(url);

            //添加请求头信息
            if (header != null) {
                for (String key : header.keySet()) {
                    httpPost.setHeader(key, header.get(key).toString());
                }
            }
            // 创建参数列表
            if (param != null) {
                List<NameValuePair> paramList = new ArrayList();
                for (String key : param.keySet()) {
                    paramList.add(new BasicNameValuePair(key, param.get(key)));
                }
                // 模拟表单
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList,"utf-8");
                httpPost.setEntity(entity);
            }
            // 执行http请求
            HttpResponse httpResponse = httpClient.execute(httpPost);
            HttpEntity httpEntity = httpResponse.getEntity();

            Header[] headers = httpResponse.getHeaders("Content-Disposition");
            String name=null;
            for (Header hd:headers) {
                String value = hd.getValue();
                if (value.contains("filename")){
                    name=value.substring(value.indexOf("=")+1);
                }
            }
            
            // 设置响应头，告诉浏览器返回的是文件流
            response.setHeader("Content-Disposition", "attachment;filename=" + name);

            // 获取文件流并写入到response的输出流中
            try (OutputStream outputStream = response.getOutputStream()) {
                httpEntity.writeTo(outputStream);
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    /**
     * @Auther: gengshuai@cetiti.com
     * @Description: application/x-www-form-urlencoded编码方式带参数和请求头的POST请求
     * @Param: [url, param, header]
     * @Return: java.lang.String
     */
    public static String doPost(String url, Map<String, String> param, Map<String, String> header) {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String resultString = "";
        try {
            // 创建Http Post请求
            HttpPost httpPost = new HttpPost(url);

            //添加请求头信息
            if (header != null) {
                for (String key : header.keySet()) {
                    httpPost.setHeader(key, header.get(key).toString());
                }
            }
            // 创建参数列表
            if (param != null) {
                List<NameValuePair> paramList = new ArrayList();
                for (String key : param.keySet()) {
                    paramList.add(new BasicNameValuePair(key, param.get(key)));
                }
                // 模拟表单
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList,"utf-8");
                httpPost.setEntity(entity);
            }
            // 执行http请求
            response = httpClient.execute(httpPost);
            resultString = EntityUtils.toString(response.getEntity(), "utf-8");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return resultString;
    }

    /**
     * @Auther: gengshuai@cetiti.com
     * @Description: application/x-www-form-urlencoded编码方式无参POST请求
     * @Param: [url]
     * @Return: java.lang.String
     */
    public static String doPost(String url) {
        return doPost(url, null);
    }



    /**
     * @Auther: gengshuai@cetiti.com
     * @Description: application/json编码方式POST请求
     * @Param: [url, json]
     * @Return: java.lang.String
     */
    public static String  doPostJson(String url, String json) {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String resultString = "";
        try {
            // 创建Http Post请求
            HttpPost httpPost = new HttpPost(url);
            // 创建请求内容
            StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
            httpPost.setEntity(entity);
            // 执行http请求
            response = httpClient.execute(httpPost);
            resultString = EntityUtils.toString(response.getEntity(), "utf-8");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                response.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

        return resultString;
    }

    /**
     * @Auther: gengshuai@cetiti.com
     * @Description: application/json编码方式带请求头POST请求
     * @Param: [url, json, header]
     * @Return: java.lang.String
     */
    public static String doPostJson(String url, String json, Map<String, String> header) {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String resultString = "";
        try {
            // 创建Http Post请求
            HttpPost httpPost = new HttpPost(url);

            //添加请求头信息
            if (header != null) {
                for (String key : header.keySet()) {
                    httpPost.setHeader(key, header.get(key).toString());
                }
            }
            // 创建请求内容
            StringEntity entity = new StringEntity(json, "utf-8");
            httpPost.setEntity(entity);
            // 执行http请求
            response = httpClient.execute(httpPost);
            resultString = EntityUtils.toString(response.getEntity(), "utf-8");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return resultString;
    }

}