package com.jysoft.weChat.util;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.List;
import java.util.Map;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

/**
 * http 工具类
 */
public class HttpUtil {

	public static String postHttpsResponse1(String requestUrl, String params) throws Exception {
		String contentType = "application/x-www-form-urlencoded";
		return post(requestUrl, contentType, params);
	}

	// json 方式数据请求
	public static String postHttpsResponse(String requestUrl, String params) throws Exception {
		String contentType = "application/json";
		return post(requestUrl, contentType, params);
	}

	public static String post(String requestUrl, String contentType, String params) throws Exception {
		String encoding = "UTF-8";
		if (requestUrl.contains("nlp")) {
			encoding = "GBK";
		}

		URL url = new URL(requestUrl);
		// 打开和URL之间的连接
		HttpURLConnection connection = (HttpURLConnection) url.openConnection();
		connection.setRequestMethod("POST");
		// 设置通用的请求属性
		connection.setRequestProperty("Content-Type", contentType);
		connection.setRequestProperty("Connection", "Keep-Alive");
		// 不使用缓冲
		connection.setUseCaches(false);
		// 允许输出流，即允许上传
		connection.setDoOutput(true);
		// 允许下载
		connection.setDoInput(true);

		// 得到请求的输出流对象
		DataOutputStream out = new DataOutputStream(connection.getOutputStream());
		out.write(params.getBytes(encoding));
		out.flush();
		out.close();

		// 建立实际的连接
		connection.connect();
		// 获取所有响应头字段
		Map<String, List<String>> headers = connection.getHeaderFields();
		// 遍历所有的响应头字段
		for (String key : headers.keySet()) {
			System.err.println(key + "--->" + headers.get(key));
		}
		// 定义 BufferedReader输入流来读取URL的响应
		BufferedReader in = null;
		in = new BufferedReader(new InputStreamReader(connection.getInputStream(), encoding));
		String result = "";
		String getLine;
		while ((getLine = in.readLine()) != null) {
			result += getLine;
		}
		in.close();
		System.err.println("result:" + result);
		return result;
	}

	// get方式数据请求
	public static String getHttpsResponse(String reqUrl, String requestMethod) {
		URL url;
		InputStream is;
		String result = "";

		try {
			url = new URL(reqUrl);
			HttpsURLConnection con = (HttpsURLConnection) url.openConnection();

			TrustManager[] tm = { xtm };
			SSLContext ctx = SSLContext.getInstance("TLS");
			ctx.init(null, tm, null);

			con.setSSLSocketFactory(ctx.getSocketFactory());
			con.setHostnameVerifier(new HostnameVerifier() {
				@Override
				public boolean verify(String arg0, SSLSession arg1) {
					return true;
				}
			});

			con.setDoInput(true); // 允许输入流，即允许下载

			// 在android中必须将此项设置为false
			con.setDoOutput(false); // 允许输出流，即允许上传
			con.setUseCaches(false); // 不使用缓冲
			if (null != requestMethod && !requestMethod.equals("")) {
				con.setRequestMethod(requestMethod); // 使用指定的方式
			} else {
				con.setRequestMethod("GET"); // 使用get请求
			}
			is = con.getInputStream(); // 获取输入流，此时才真正建立链接
			InputStreamReader isr = new InputStreamReader(is);
			BufferedReader bufferReader = new BufferedReader(isr);
			String inputLine;
			while ((inputLine = bufferReader.readLine()) != null) {
				result += inputLine + "\n";
			}
			System.out.println(result);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return result;
	}

	static X509TrustManager xtm = new X509TrustManager() {
		@Override
		public X509Certificate[] getAcceptedIssuers() {
			return null;
		}

		@Override
		public void checkServerTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
		}

		@Override
		public void checkClientTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
		}
	};
}