/**

      * 打开一个Http连接，失败则返回null

      * 

      * @param msg

      * @param proxy

      * @return

      */

     private HttpURLConnection getConnection(HttpMsg msg) throws Throwable {

      String url = msg.getUrl();

      HttpURLConnection conn = null;

   String defaultHost = Proxy.getDefaultHost();

   int defaultPort = Proxy.getDefaultPort();

   URL hostUrl = null;

   

   ConnectivityManager connectivityManager = (ConnectivityManager)mContext.getSystemService(Context.CONNECTIVITY_SERVICE);

   NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();

   int type = -1;

   if(activeNetworkInfo!=null){

    type = activeNetworkInfo.getType();

   }

   String exrea = activeNetworkInfo.getExtraInfo();

   

     //wap

   if(type == ConnectivityManager.TYPE_MOBILE

     && (exrea != null && exrea.endsWith("wap")) && defaultHost != null

     && defaultPort > 0){

    

    String host = null;

    String path = null;

    int hostIndex = "
​​​http://".length​​​();

    int pathIndex = url.indexOf('/', hostIndex);

    if (pathIndex < 0) {

     host = url.substring(hostIndex);

     path = "";

    } else {

     host = url.substring(hostIndex, pathIndex);

     path = url.substring(pathIndex);

    }

    hostUrl = new URL("http://" + defaultHost + ":" + defaultPort

      + path);

    conn = (HttpURLConnection) hostUrl.openConnection();

    conn.setRequestProperty("X-Online-Host", host);

    

   }

   //某些机型extra会有null情况 并且有代理

   else if ((type == ConnectivityManager.TYPE_MOBILE) && exrea == null && defaultHost != null && defaultPort > 0)

   {

    java.net.Proxy proxy = new java.net.Proxy(Type.HTTP, new InetSocketAddress(defaultHost, defaultPort));

    URL proxyURL = new URL(url);

    conn = (HttpURLConnection) proxyURL.openConnection(proxy);

   }

   else {


    hostUrl = new URL(url);

    conn = (HttpURLConnection) hostUrl.openConnection();

   }

   conn.setConnectTimeout(10000);

   conn.setInstanceFollowRedirects(msg.isInstanceFollowRedirects());

         Enumeration enu = msg.requestProperty.keys();

         String key;

         String value;

         while (enu.hasMoreElements()) {

             key = (String) enu.nextElement();

             value = (String) msg.requestProperty.get(key);

             conn.setRequestProperty(key, value);

         }

         return conn;

     }