package com.dsh.other.util;

import com.alibaba.fastjson.JSONObject;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.SimpleHttpConnectionManager;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.security.MessageDigest;
import java.util.Map;

public class HttpRequestUtil {

    public static String postRequest(String url, Map<String, String> params) {
        // 构造HttpClient的实例
        HttpClient httpClient = new HttpClient();
        // 创建POST方法的实例
        PostMethod postMethod = new PostMethod(url);
        // 设置请求头信息
        postMethod.setRequestHeader("Connection", "close");
        postMethod.addRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
        // 添加参数
        for (Map.Entry<String, String> entry : params.entrySet()) {
            postMethod.addParameter(entry.getKey(), entry.getValue());
        }
        // 使用系统提供的默认的恢复策略,设置请求重试处理，用的是默认的重试处理：请求三次
        httpClient.getParams().setBooleanParameter("http.protocol.expect-continue", false);
        // 接收处理结果
        String result = null;
        try {
            // 执行Http Post请求
            httpClient.executeMethod(postMethod);
            // 返回处理结果
            result = postMethod.getResponseBodyAsString();
        } catch (HttpException e) {
            // 发生致命的异常，可能是协议不对或者返回的内容有问题
            System.out.println("请检查输入的URL!");
            e.printStackTrace();
        } catch (IOException e) {
            // 发生网络异常
            System.out.println("发生网络异常!");
            e.printStackTrace();
        } finally {
            // 释放链接
            postMethod.releaseConnection();
            // 关闭HttpClient实例
            if (httpClient != null) {
                ((SimpleHttpConnectionManager) httpClient.getHttpConnectionManager()).shutdown();
                httpClient = null;
            }
        }
        return result;
    }

    public static String postRequest1(String url, Map<String, String> params, String appKey, String appSecret) {
        // 构造HttpClient的实例
        HttpClient httpClient = new HttpClient();
        // 创建POST方法的实例
        PostMethod postMethod = new PostMethod(url);
        // 设置请求头信息
        String nonce = String.valueOf(Double.valueOf(Math.random() * 1000000.0D).intValue());
        String timeMillis = String.valueOf(System.currentTimeMillis());
        String signature = string2Sha1(appSecret + nonce + timeMillis);
        postMethod.setRequestHeader("Host", "api-cn.ronghub.com");
        postMethod.setRequestHeader("App-Key", appKey);
        postMethod.setRequestHeader("Signature", signature);
        postMethod.setRequestHeader("Nonce", nonce);
        postMethod.setRequestHeader("Timestamp", timeMillis);
        postMethod.setRequestHeader("Host", "api-cn.ronghub.com");
        postMethod.addRequestHeader("Content-Type", "application/json");
        // 添加参数
        for (Map.Entry<String, String> entry : params.entrySet()) {
            postMethod.addParameter(entry.getKey(), entry.getValue());
        }
        // 使用系统提供的默认的恢复策略,设置请求重试处理，用的是默认的重试处理：请求三次
        httpClient.getParams().setBooleanParameter("http.protocol.expect-continue", false);
        // 接收处理结果
        String result = null;
        try {
            // 执行Http Post请求
            httpClient.executeMethod(postMethod);
            // 返回处理结果
            result = postMethod.getResponseBodyAsString();
        } catch (HttpException e) {
            // 发生致命的异常，可能是协议不对或者返回的内容有问题
            System.out.println("请检查输入的URL!");
            e.printStackTrace();
        } catch (IOException e) {
            // 发生网络异常
            System.out.println("发生网络异常!");
            e.printStackTrace();
        } finally {
            // 释放链接
            postMethod.releaseConnection();
            // 关闭HttpClient实例
            if (httpClient != null) {
                ((SimpleHttpConnectionManager) httpClient.getHttpConnectionManager()).shutdown();
                httpClient = null;
            }
        }
        return result;
    }

    private static String string2Sha1(String str) {
        if (str == null || str.length() == 0) {
            return null;
        }
        char hexDigits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
                'a', 'b', 'c', 'd', 'e', 'f'};
        try {
            MessageDigest mdTemp = MessageDigest.getInstance("SHA1");
            mdTemp.update(str.getBytes("UTF-8"));

            byte[] md = mdTemp.digest();
            int j = md.length;
            char buf[] = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                buf[k++] = hexDigits[byte0 >>> 4 & 0xf];
                buf[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(buf);
        } catch (Exception e) {
            return null;
        }
    }

    public static String getRequest(String url, Map<String, String> params) {
        // 构造HttpClient实例
        HttpClient client = new HttpClient();
        // 拼接参数
        String paramStr = "";
        for (String key : params.keySet()) {
            paramStr = paramStr + "&" + key + "=" + params.get(key);
        }
        paramStr = paramStr.substring(1);
        // 创建GET方法的实例
        GetMethod method = new GetMethod(url + "?" + paramStr);
        // 接收返回结果
        String result = null;
        try {
            // 执行HTTP GET方法请求
            client.executeMethod(method);
            // 返回处理结果
            result = method.getResponseBodyAsString();
        } catch (HttpException e) {
            // 发生致命的异常，可能是协议不对或者返回的内容有问题
            System.out.println("请检查输入的URL!");
            e.printStackTrace();
        } catch (IOException e) {
            // 发生网络异常
            System.out.println("发生网络异常!");
            e.printStackTrace();
        } finally {
            // 释放链接
            method.releaseConnection();
            // 关闭HttpClient实例
            if (client != null) {
                ((SimpleHttpConnectionManager) client
                        .getHttpConnectionManager()).shutdown();
                client = null;
            }
        }
        return result;
    }


    /**
     * 发送网络请求
     *
     * @param url
     * @return
     */
    public static String sendNetRequest(String url, Map<String, String> params) {
        // 构造HttpClient实例
        HttpClient client = new HttpClient();
        String paramStr = "";
        for (String key : params.keySet()) {
            paramStr = paramStr + "&" + key + "=" + params.get(key);
        }
        paramStr = paramStr.substring(1);
        System.err.println(url + "?" + paramStr);
        // 创建GET方法的实例
        GetMethod method = new GetMethod(url + "?" + paramStr);
        // 接收返回结果
        String result = null;
        try {
            // 执行HTTP GET方法请求
            client.executeMethod(method);
            // 返回处理结果
            result = method.getResponseBodyAsString();
        } catch (HttpException e) {
            // 发生致命的异常，可能是协议不对或者返回的内容有问题
            System.out.println("请检查输入的URL!");
            e.printStackTrace();
        } catch (IOException e) {
            // 发生网络异常
            System.out.println("发生网络异常!");
            e.printStackTrace();
        } finally {
            // 释放链接
            method.releaseConnection();
            // 关闭HttpClient实例
            if (client != null) {
                ((SimpleHttpConnectionManager) client.getHttpConnectionManager()).shutdown();
                client = null;
            }
        }
        return result;
    }


    /**
     * jsonp跨域请求数据响应<br/>
     * 方法名：responsejsonpData<br/>
     *
     * @param request
     * @param response
     * @param map      void<br/>
     * @throws <br/>
     * @author：Mryang<br/>
     * @createTime：2016年7月31日-下午11:17:31 <br/>
     * @tel: 15198268054<br   />
     * @since 1.0.0
     */
    public void responsejsonpData(HttpServletRequest request, HttpServletResponse response, Map<String, Object> map) {
        response.setCharacterEncoding("UTF-8");
        response.setHeader("Content-Type", "text/html;Charset=utf-8");
        try {
            PrintWriter writer = response.getWriter();
            String params = request.getParameter("callback");
            String json = JSONObject.toJSONString(map);
            writer.print(params + "(" + json + ")");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


}