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package com.kedauis.util;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.Map;

/**
 * @author Administrator
 *
 */
public class HttpUtil {

	protected final static Log logger = LogFactory.getLog(HttpUtil.class);
	/**
	 * 使用Get方式获取数据
	 *
	 * @param url URL包括参数
	 * @param charset 字符集
	 * @return 结果
	 * @throws Exception 连接异常
	 */
	public static String sendGet(String url, String charset) throws Exception{
		String result = "";
		BufferedReader in = null;
		try {
			URL realUrl = new URL(url);
			// 打开和URL之间的连接
			URLConnection connection = 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.setReadTimeout(1000 * 60 * 3);
			connection.setConnectTimeout(1000 * 60 * 3);
			// 建立实际的连接
			connection.connect();
			// 定义 BufferedReader输入流来读取URL的响应
			in = new BufferedReader(new InputStreamReader(
					connection.getInputStream(), charset));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			logger.error("发送GET请求出现异常！" + e);
			throw new Exception(e);
		}
		// 使用finally块来关闭输入流
		finally {
			try {
				if (in != null) {
					in.close();
				}
			} catch (Exception e2) {
				logger.error("关闭请求发生异常！" + e2);
			}
		}
		return result;
	}

	/**
	 * POST请求，字符串形式数据
	 * @param url 请求地址
	 * @param param 请求数据
	 * @param charset 编码方式
	 * @return 结果
	 * @throws Exception 连接异常
	 */
	public static String sendPostUrl(String url, String param, String charset) throws Exception{

		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)");
			conn.setReadTimeout(1000 * 60 * 3);
			conn.setConnectTimeout(1000 * 60 * 3);
			// 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
			out = new PrintWriter(conn.getOutputStream());
			// 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(), charset));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			logger.error("发送 POST 请求出现异常！" + e);
			throw new Exception(e);
		}
		// 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) {
				logger.error("关闭 POST 请求出现异常！" + ex);
			}
		}
		return result;
	}
	/**
	 * POST请求，Map形式数据
	 * @param url 请求地址
	 * @param param 请求数据
	 * @param charset 编码方式
	 * @return 结果
	 * @throws Exception 连接异常
	 */
	public static String sendPost(String url, Map param, String charset) throws Exception{

		StringBuffer buffer = new StringBuffer();
		if (param != null && !param.isEmpty()) {
			for (Map.Entry entry : param.entrySet()) {
				buffer.append(entry.getKey()).append("=")
						.append(URLEncoder.encode(entry.getValue()))
						.append("&");

			}
		}
		buffer.deleteCharAt(buffer.length() - 1);

		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)");
			conn.setReadTimeout(1000 * 60 * 3);
			conn.setConnectTimeout(1000 * 60 * 3);
			// 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
			out = new PrintWriter(conn.getOutputStream());
			// 发送请求参数
			out.print(buffer);
			// 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(), charset));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			logger.error("发送 POST 请求出现异常！" + e);
			throw new Exception(e);
		}
		// 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) {
				logger.error("关闭 POST 请求出现异常！" + ex);
			}
		}
		return result;
	}

}