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package com.abin.lee.util;

import org.apache.commons.collections4.maputils;
import org.apache.commons.lang3.stringutils;
import org.apache.http.*;
import org.apache.http.client.httprequestretryhandler;
import org.apache.http.client.config.cookiespecs;
import org.apache.http.client.config.requestconfig;
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.protocol.httpclientcontext;
import org.apache.http.config.registry;
import org.apache.http.config.registrybuilder;
import org.apache.http.conn.connecttimeoutexception;
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.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.message.basicheader;
import org.apache.http.message.basicnamevaluepair;
import org.apache.http.protocol.httpcontext;
import org.apache.http.util.entityutils;

import javax.net.ssl.*;
import java.io.ioexception;
import java.io.interruptedioexception;
import java.net.unknownhostexception;
import java.nio.charset.charset;
import java.security.cert.certificateexception;
import java.security.cert.x509certificate;
import java.util.*;

/**
 * created with intellij idea.
 * user: abin
 * date: 16-4-18
 * time: 上午10:24
 * to change this template use file | settings | file templates.
 */
public class httpclientutil {
    private static closeablehttpclient httpsclient = null;
    private static closeablehttpclient httpclient = null;

    static {
        httpclient = gethttpclient();
        httpsclient = gethttpsclient();
    }

    public static closeablehttpclient gethttpclient() {
        try {
            httpclient = httpclients.custom()
                    .setconnectionmanager(poolmanager.gethttppoolinstance())
                    .setconnectionmanagershared(true)
                    .setdefaultrequestconfig(requestconfig())
                    .setretryhandler(retryhandler())
                    .build();
        } catch (exception e) {
            e.printstacktrace();
        }
        return httpclient;
    }


    public static closeablehttpclient gethttpsclient() {
        try {
            //secure protocol implementation.
 sslcontext ctx = sslcontext.getinstance("ssl");
            //implementation of a trust manager for x509 certificates
 trustmanager x509trustmanager = new x509trustmanager() {
                public void checkclienttrusted(x509certificate[] xcs,
                                               string string) throws certificateexception {
                }
                public void checkservertrusted(x509certificate[] xcs,
                                               string string) throws certificateexception {
                }
                public x509certificate[] getacceptedissuers() {
                    return null;
                }
            };
            ctx.init(null, new trustmanager[]{x509trustmanager}, null);
            //首先设置全局的标准cookie策略
//            requestconfig requestconfig = requestconfig.custom().setcookiespec(cookiespecs.standard_strict).build();
 connectionsocketfactory connectionsocketfactory = new sslconnectionsocketfactory(ctx, hostnameverifier);
            registry socketfactoryregistry = registrybuilder.create()
                    .register("http", plainconnectionsocketfactory.instance)
                    .register("https", connectionsocketfactory).build();
            // 设置连接池
 httpsclient = httpclients.custom()
                    .setconnectionmanager(poolsmanager.gethttpspoolinstance(socketfactoryregistry))
                    .setconnectionmanagershared(true)
                    .setdefaultrequestconfig(requestconfig())
                    .setretryhandler(retryhandler())
                    .build();
        } catch (exception e) {
            e.printstacktrace();
        }
        return httpsclient;
    }

    // 配置请求的超时设置
    //首先设置全局的标准cookie策略
 public static requestconfig requestconfig(){
        requestconfig requestconfig = requestconfig.custom()
                .setcookiespec(cookiespecs.standard_strict)
                .setconnectionrequesttimeout(20000)
                .setconnecttimeout(20000)
                .setsockettimeout(20000)
                .build();
        return requestconfig;
    }

    public static httprequestretryhandler retryhandler(){
        //请求重试处理
 httprequestretryhandler httprequestretryhandler = new httprequestretryhandler() {
            public boolean retryrequest(ioexception exception,int executioncount, httpcontext context) {
                if (executioncount >= 5) {// 如果已经重试了5次，就放弃
 return false;
                }
                if (exception instanceof nohttpresponseexception) {// 如果服务器丢掉了连接，那么就重试
 return true;
                }
                if (exception instanceof sslhandshakeexception) {// 不要重试ssl握手异常
 return false;
                }
                if (exception instanceof interruptedioexception) {// 超时
 return false;
                }
                if (exception instanceof unknownhostexception) {// 目标服务器不可达
 return false;
                }
                if (exception instanceof connecttimeoutexception) {// 连接被拒绝
 return false;
                }
                if (exception instanceof sslexception) {// ssl握手异常
 return false;
                }

                httpclientcontext clientcontext = httpclientcontext.adapt(context);
                httprequest request = clientcontext.getrequest();
                // 如果请求是幂等的，就再次尝试
 if (!(request instanceof httpentityenclosingrequest)) {
                    return true;
                }
                return false;
            }
        };
        return httprequestretryhandler;
    }



    //创建hostnameverifier
    //用于解决javax.net.ssl.sslexception: hostname in certificate didn't match: <123.125.97.66> != <123.125.97.241>
 static hostnameverifier hostnameverifier = new noophostnameverifier(){
        @override
 public boolean verify(string s, sslsession sslsession) {
            return super.verify(s, sslsession);
        }
    };


    public static class poolmanager {
        public static poolinghttpclientconnectionmanager clientconnectionmanager = null;
        private static int maxtotal = 200;
        private static int defaultmaxperroute = 100;

        private poolmanager(){
            clientconnectionmanager.setmaxtotal(maxtotal);
            clientconnectionmanager.setdefaultmaxperroute(defaultmaxperroute);
        }

        private static class poolmanagerholder{
            public static  poolmanager instance = new poolmanager();
        }

        public static poolmanager getinstance() {
            if(null == clientconnectionmanager)
                clientconnectionmanager = new poolinghttpclientconnectionmanager();
            return poolmanagerholder.instance;
        }

        public static poolinghttpclientconnectionmanager gethttppoolinstance() {
            poolmanager.getinstance();
//            system.out.println("getavailable="   clientconnectionmanager.gettotalstats().getavailable());
//            system.out.println("getleased="   clientconnectionmanager.gettotalstats().getleased());
//            system.out.println("getmax="   clientconnectionmanager.gettotalstats().getmax());
//            system.out.println("getpending=" clientconnectionmanager.gettotalstats().getpending());
 return poolmanager.clientconnectionmanager;
        }


    }

    public static class poolsmanager {
        public static poolinghttpclientconnectionmanager clientconnectionmanager = null;
        private static int maxtotal = 200;
        private static int defaultmaxperroute = 100;

        private poolsmanager(){
            clientconnectionmanager.setmaxtotal(maxtotal);
            clientconnectionmanager.setdefaultmaxperroute(defaultmaxperroute);
        }

        private static class poolsmanagerholder{
            public static  poolsmanager instance = new poolsmanager();
        }

        public static poolsmanager getinstance(registry socketfactoryregistry) {
            if(null == clientconnectionmanager)
                clientconnectionmanager = new poolinghttpclientconnectionmanager(socketfactoryregistry);
            return poolsmanagerholder.instance;
        }

        public static poolinghttpclientconnectionmanager gethttpspoolinstance(registry socketfactoryregistry) {
            poolsmanager.getinstance(socketfactoryregistry);
//            system.out.println("getavailable="   clientconnectionmanager.gettotalstats().getavailable());
//            system.out.println("getleased="   clientconnectionmanager.gettotalstats().getleased());
//            system.out.println("getmax="   clientconnectionmanager.gettotalstats().getmax());
//            system.out.println("getpending=" clientconnectionmanager.gettotalstats().getpending());
 return poolsmanager.clientconnectionmanager;
        }

    }

    public static string httppost(map request, string httpurl){
        string result = "";
        closeablehttpclient httpclient = gethttpclient();
        try {
            if(maputils.isempty(request))
                throw new exception("请求参数不能为空");
            httppost httppost = new httppost(httpurl);
            list nvps = new arraylist();
            for(iterator> iterator=request.entryset().iterator(); iterator.hasnext();){
                map.entry entry = iterator.next();
                nvps.add(new basicnamevaluepair(entry.getkey(), entry.getvalue()));
            }
            httppost.setentity(new urlencodedformentity(nvps, consts.utf_8));
            system.out.println("executing request: "   httppost.getrequestline());
            closeablehttpresponse response = httpclient.execute(httppost);
            result = entityutils.tostring(response.getentity());
            system.out.println("executing response: "  result);
        } catch (exception e) {
            throw new runtimeexception(e);
        } finally {
            try {
                httpclient.close();
            } catch (ioexception e) {
                e.printstacktrace();
            }
        }
        return result;
    }

    public static string httppost(string json, string httpurl, map headers){
        string result = "";
        closeablehttpclient httpclient = gethttpclient();
        try {
            if(stringutils.isblank(json))
                throw new exception("请求参数不能为空");
            httppost httppost = new httppost(httpurl);
            for(iterator> iterator=headers.entryset().iterator();iterator.hasnext();){
                map.entry entry = iterator.next();
                header header = new basicheader(entry.getkey(), entry.getvalue());
                httppost.setheader(header);
            }
            httppost.setentity(new stringentity(json, charset.forname("utf-8")));
            system.out.println("executing request: "   httppost.getrequestline());
            closeablehttpresponse response = httpclient.execute(httppost);
            result = entityutils.tostring(response.getentity());
            system.out.println("executing response: "  result);
        } catch (exception e) {
            throw new runtimeexception(e);
        } finally {
            try {
                httpclient.close();
            } catch (ioexception e) {
                e.printstacktrace();
            }
        }
        return result;
    }

    public static string httpget(string httpurl, map headers) {
        string result = "";
        closeablehttpclient httpclient = gethttpclient();
        try {
            httpget httpget = new httpget(httpurl);
            system.out.println("executing request: "   httpget.getrequestline());
            for(iterator> iterator=headers.entryset().iterator();iterator.hasnext();){
                map.entry entry = iterator.next();
                header header = new basicheader(entry.getkey(), entry.getvalue());
                httpget.setheader(header);
            }
            closeablehttpresponse response = httpclient.execute(httpget);
            result = entityutils.tostring(response.getentity());
            system.out.println("executing response: "  result);
        } catch (exception e) {
            throw new runtimeexception(e);
        } finally {
            try {
                httpclient.close();
            } catch (ioexception e) {
                e.printstacktrace();
            }
        }
        return result;
    }


    public static string httpget(string httpurl) {
        string result = "";
        closeablehttpclient httpclient = gethttpclient();
        try {
            httpget httpget = new httpget(httpurl);
            system.out.println("executing request: "   httpget.getrequestline());
            closeablehttpresponse response = httpclient.execute(httpget);
            result = entityutils.tostring(response.getentity());
            system.out.println("executing response: "  result);
        } catch (exception e) {
            throw new runtimeexception(e);
        } finally {
            try {
                httpclient.close();
            } catch (ioexception e) {
                e.printstacktrace();
            }
        }
        return result;
    }