package com.test;

import com.sun.istack.internal.Nullable;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Map;

public class HttpClient {
    public static String doGetToLocation(String httpurl, Map<String, String> map) {
        String Location = "";
        showLog("----------------------------------------------------------------");
        showLog("请求方式：\nget");
        showLog("请求地址：\n" + httpurl);
        showLog("----------------------------------------------------------------");
        HttpURLConnection connection = null;
        InputStream is = null;
        BufferedReader br = null;
        String result = "";// 返回结果字符串
        try {
            // 创建远程url连接对象
            URL url = new URL(httpurl);
            // 通过远程url连接对象打开一个连接，强转成httpURLConnection类
            connection = (HttpURLConnection) url.openConnection();
            // 设置连接方式：get
            connection.setRequestMethod("GET");
            // 设置连接主机服务器的超时时间：15000毫秒
            connection.setConnectTimeout(15000);
            // 设置读取远程返回的数据时间：60000毫秒
            connection.setReadTimeout(60000);
            if (map != null) {
                for (String s : map.keySet()) {
                    connection.setRequestProperty(s, map.get(s));
                    showLog(s + ":" + map.get(s));
                }
            }
            // 发送请求
            connection.connect();
            Location = connection.getHeaderField("Location");
            if (Location == null || Location.isEmpty()){
                connection.getHeaderField("location");
            }
            // 通过connection连接，获取输入流
            if (connection.getResponseCode() == 200) {
                is = connection.getInputStream();
                // 封装输入流is，并指定字符集
                br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                // 存放数据
                StringBuffer sbf = new StringBuffer();
                String temp = null;
                while ((temp = br.readLine()) != null) {
                    sbf.append(temp);
                    sbf.append("\r\n");
                }
                result = sbf.toString();
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            if (null != br) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != is) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            connection.disconnect();// 关闭远程连接
        }
        showLog("----------------------------------------------------------------");
        showLog(result);
        if (!(Location == null || Location.isEmpty())) {
            return doGetToLocation(Location, map);
        }
        return result;
    }

    public static String doGet(String httpurl, Map<String, String> map) {
        return doGet(httpurl,map,"UTF-8");
    }
    public static String doGet(String httpurl, Map<String, String> map,String charset) {
        showLog("----------------------------------------------------------------");
        showLog("请求方式：\nget");
        showLog("请求地址：\n" + httpurl);
        showLog("----------------------------------------------------------------");
        HttpURLConnection connection = null;
        InputStream is = null;
        BufferedReader br = null;
        String result = null;// 返回结果字符串
        try {
            // 创建远程url连接对象
            URL url = new URL(httpurl);
            // 通过远程url连接对象打开一个连接，强转成httpURLConnection类
            connection = (HttpURLConnection) url.openConnection();
            // 设置连接方式：get
            connection.setRequestMethod("GET");
            // 设置连接主机服务器的超时时间：15000毫秒
            connection.setConnectTimeout(15000);
            // 设置读取远程返回的数据时间：60000毫秒
            connection.setReadTimeout(60000);
            if (map != null) {
                for (String s : map.keySet()) {
                    connection.setRequestProperty(s, map.get(s));
                    showLog(s + ":" + map.get(s));
                }
            }
            // 发送请求
            connection.connect();
            // 通过connection连接，获取输入流
            if (connection.getResponseCode() == 200) {
                is = connection.getInputStream();
                // 封装输入流is，并指定字符集
                br = new BufferedReader(new InputStreamReader(is, charset));
                // 存放数据
                StringBuffer sbf = new StringBuffer();
                String temp = null;
                while ((temp = br.readLine()) != null) {
                    sbf.append(temp);
                    sbf.append("\r\n");
                }
                result = sbf.toString();
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            if (null != br) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != is) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            connection.disconnect();// 关闭远程连接
        }
        showLog("----------------------------------------------------------------");
        showLog(result);
        return result;
    }

    public static String doPost(String httpUrl, String param, @Nullable String contentType, Map<String, String> map, String charset) {
        contentType = (contentType == null || contentType.isEmpty()) ? "application/x-www-form-urlencoded;charset=UTF-8" : contentType;
        showLog("----------------------------------------------------------------");
        showLog("请求方式：\npost");
        showLog("请求地址：\n" + httpUrl);
        showLog("Content-Type：\n" + contentType);
        showLog("请求参数：\n" + param);
        showLog("----------------------------------------------------------------");
        HttpURLConnection connection = null;
        InputStream is = null;
        OutputStream os = null;
        BufferedReader br = null;
        String result = null;
        try {
            URL url = new URL(httpUrl);
            // 通过远程url连接对象打开连接
            connection = (HttpURLConnection) url.openConnection();
            // 设置连接请求方式
            connection.setRequestMethod("POST");
            // 设置连接主机服务器超时时间：15000毫秒
            connection.setConnectTimeout(15000);
            // 设置读取主机服务器返回数据超时时间：60000毫秒
            connection.setReadTimeout(60000);
            // 默认值为：false，当向远程服务器传送数据/写数据时，需要设置为true
            connection.setDoOutput(true);
            // 默认值为：true，当前向远程服务读取数据时，设置为true，该参数可有可无
            connection.setDoInput(true);

            connection.setRequestProperty("Content-Type", contentType);
            if (map != null) {
                for (String s : map.keySet()) {
                    connection.setRequestProperty(s, map.get(s));
                    showLog(s + ":" + map.get(s));
                }
            }
            // 设置鉴权信息：Authorization: Bearer da3efcbf-0845-4fe3-8aba-ee040be542c0
            // 通过连接对象获取一个输出流
            os = connection.getOutputStream();
            // 通过输出流对象将参数写出去/传输出去,它是通过字节数组写出的
            if (param != null)
                os.write(param.getBytes());
            // 通过连接对象获取一个输入流，向远程读取
            if (connection.getResponseCode() == 200) {

                is = connection.getInputStream();
                // 对输入流对象进行包装:charset根据工作项目组的要求来设置
                br = new BufferedReader(new InputStreamReader(is, charset));
                StringBuffer sbf = new StringBuffer();
                String temp = null;
                // 循环遍历一行一行读取数据
                while ((temp = br.readLine()) != null) {
                    sbf.append(temp);
                    sbf.append("\r\n");
                }
                result = sbf.toString();
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            if (null != br) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != os) {
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != is) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            // 断开与远程地址url的连接
            connection.disconnect();
        }
        showLog("----------------------------------------------------------------");
        showLog(result);
        return result;
    }

    public static void showLog(String text) {
        System.out.println(text);
    }

    public static String doPost(String httpUrl, String param, String contentType, Map<String, String> map) {
        return doPost(httpUrl, param, contentType, map, "UTF-8");
    }
}