package com.yunniu.farming.util;

import com.alibaba.fastjson.JSONObject;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;

public class HttpRequest {
    /**
     * 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 URL 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param) {
        String result = "";
        BufferedReader in = null;
        InputStream ins = null;
        HttpURLConnection connection = null;
        try {
        	
        	String urlNameString = url;
            if(StringHelper.isNotEmpty(param)){
            	urlNameString = url + "?" + param;
            }
        	
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            connection = (HttpURLConnection)realUrl.openConnection();
            // 设置通用的请求属性
            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.setConnectTimeout(100000);
            connection.setReadTimeout(100000);
//            connection.setRequestProperty("encoding","UTF-8");
            
            // 建立实际的连接
            connection.connect();
          
            // 获取所有响应头字段
//            Map<String, List<String>> map = connection.getHeaderFields();
//            //System.out.println("以下为响应头内容:" + map);
            
            // 定义 BufferedReader输入流来读取URL的响应
            //zhj:必须要进行编码处理 ，否则变成乱码报错;
            ins = connection.getInputStream();
            in = new BufferedReader(new InputStreamReader(ins,"UTF-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
            connection.disconnect();
        } catch (Exception e) {
            //System.out.println("发送GET请求出现异常===============" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if(in != null) {in.close();}
                if(ins != null){ins.close();}
                if(connection != null){connection.disconnect();}
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }
    
    
    public static String sendGet(String url) {
    	return HttpRequest.sendGet(url, "");
    }
    
    
    public static String sendGetHttps(String url){
    	try{
    		URL realUrl = new URL(url);
        	HttpURLConnection connection =  (HttpURLConnection)realUrl.openConnection();
        	BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        	String input = "";
        	String result = "";
        	while((input = in.readLine()) != null) {
        		result = result + input;
        	}
        	return result;
        	
    	} catch (Exception e) {
    		//System.out.println("HTTPS发送GET请求出现异常===============");
    		e.printStackTrace();
    	}
    	return null;
    }

    /**
     * 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) {
        return HttpRequest.sendPost(url, param, null);
    }


    public static String sendPost(String url, String param, String charset) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            if(charset==null || "".equals(charset)) {
                out = new PrintWriter(conn.getOutputStream());
            } else {
                out = new PrintWriter(new OutputStreamWriter(conn.getOutputStream(), charset));
            }
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！"+e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }
        return result;
    }

    
    public static String sendJson(String url, JSONObject param) {
        return HttpRequest.sendJson(url, param, null);
     }
    
    
    public static String sendJson(String url, JSONObject param, String charset) {
        //PrintWriter out = null;
        //BufferedReader in = null;
        //String result = "";
        
        StringBuffer buffer = null;
        DataOutputStream out = null;
        BufferedReader br = null;
        
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
//            conn.setRequestProperty("contentType", "application/json;charset=UTF-8");
            conn.setRequestProperty("Content-Type", "application/json; charset=utf-8");  
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            
            //conn.setRequestProperty("content-type", "application/json");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
//            if(charset==null || "".equals(charset)) {
//            	out = new PrintWriter(conn.getOutputStream());
//            } else {
//            	out = new PrintWriter(new OutputStreamWriter(conn.getOutputStream(), charset));
//            }
            // 发送请求参数
//            out.print(param);
            // flush输出流的缓冲
//            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
//            in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
//            String line;
//            while ((line = in.readLine()) != null) {
//                result += line;
//            }
            //往服务器端写内容     
            if(null !=param){     
//                OutputStream os=conn.getOutputStream();     
                //os.write(param.getBytes("utf-8"));
//            	os.close();     
            	out = new DataOutputStream(conn.getOutputStream());
                out.writeBytes(param.toString());
                out.flush();
                out.close();     
            }     
            // 读取服务器端返回的内容     
            InputStream is = conn.getInputStream();
            InputStreamReader isr = new InputStreamReader(is, "utf-8");
            
            br = new BufferedReader(isr);
            buffer = new StringBuffer();
            String line = null;
            while ((line = br.readLine()) != null) {     
                buffer.append(line);     
            }     
        } catch (Exception e) {
            //System.out.println("发送 POST 请求出现异常！"+e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(br!=null){
                	br.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }
        return buffer.toString();
    }
    

}