package com;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Scanner;

import javax.net.ssl.X509TrustManager;

/**
 * @author 劉顯安
 * 不使用任何SDK實現(xiàn)新浪微博Oauth授權并實現(xiàn)發(fā)微薄小Demo
 * 日期：2012年11月11日
 */
public class Test
{
  static String clientId="2355065950";//你的應用ID
  static String clientSecret="72037e76bee00315691d9c30dd8a386a";//你的應用密碼
  static String redirectUri="https://api.weibo.com/oauth2/default.html";//你在應用管理中心設置的回調頁面
  
  public static void main(String[] args) throws Exception
  {
    testHttps();//測試
    //第一步：訪問授權頁面獲取授權
    System.out.println("請打開你的瀏覽器，訪問以下頁面，登錄你的微博賬號并授權：");
    System.out.println("https://api.weibo.com/oauth2/authorize?client_id="+clientId+"&response_type=code&redirect_uri="+redirectUri+"&forcelogin=true");
    //第二步：獲取AccessToken
    System.out.println("請將授權成功后的頁面地址欄中的參數(shù)code：");
    String code=new Scanner(System.in).next();
    getAccessToken(code);
    //第三步：發(fā)布一條微博
    System.out.println("請輸入上面返回的值中accessToken的值：");
    String accessToken=new Scanner(System.in).next();
    updateStatus("發(fā)布微博測試！來自WeiboDemo！", accessToken);
  }
  /**
   * 測試能否正常訪問HTTPS打頭的網(wǎng)站，
   */
  public static void testHttps()
  {
    try
    {
      trustAllHttpsCertificates();//設置信任所有的http證書
      URL url=new URL("https://api.weibo.com/oauth2/default.html");
      URLConnection con=url.openConnection();
      con.getInputStream();
      System.out.println("恭喜，訪問HTTPS打頭的網(wǎng)站正常！");
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }
  /**
   * 以Post方式訪問一個URL
   * @param url 要訪問的URL
   * @param parameters URL后面“？”后面跟著的參數(shù)
   */
  public static void postUrl(String url,String parameters)
  {
    try
    {
      trustAllHttpsCertificates();//設置信任所有的http證書
      URLConnection conn = new URL(url).openConnection();
      conn.setDoOutput(true);// 這里是關鍵，表示我們要向鏈接里注入的參數(shù)
      OutputStreamWriter out = new OutputStreamWriter(conn.getOutputStream());// 獲得連接輸出流
      out.write(parameters);
      out.flush();
      out.close();
      // 到這里已經(jīng)完成了，開始打印返回的HTML代碼
      BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
      String line = null;
      while ((line = reader.readLine()) != null)
      {
        System.out.println(line);
      }
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }
  /**
   * 獲取AccessToken
   * @param code 在授權頁面返回的Code
   */
  public static void getAccessToken(String code)
  {
    String url="https://api.weibo.com/oauth2/access_token";
    String parameters="client_id=" +clientId+"&client_secret=" +clientSecret+
      "&grant_type=authorization_code" +"&redirect_uri=" +redirectUri+"&code="+code;
    postUrl(url, parameters);
  }
  /**
   * 利用剛獲取的AccessToken發(fā)布一條微博
   * @param text 要發(fā)布的微博內容
   * @param accessToken 剛獲取的AccessToken
   */
  public static void updateStatus(String text,String accessToken)
  {
    String url="https://api.weibo.com/2/statuses/update.json";
    String parameters="status="+text+"&access_token="+accessToken;
    postUrl(url, parameters);
    System.out.println("發(fā)布微博成功！");
  }
  /**
   * 設置信任所有的http證書（正常情況下訪問https打頭的網(wǎng)站會出現(xiàn)證書不信任相關錯誤，所以必須在訪問前調用此方法）
   * @throws Exception
   */
  private static void trustAllHttpsCertificates() throws Exception
  {
    javax.net.ssl.TrustManager[] trustAllCerts = new javax.net.ssl.TrustManager[1];
    trustAllCerts[0] = 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
      {}
    };
    javax.net.ssl.SSLContext sc = javax.net.ssl.SSLContext.getInstance("SSL");
    sc.init(null, trustAllCerts, null);
    javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
  }
}