import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Map;
  
import org.apache.http.protocol.HTTP;
  
import com.everyone.android.callback.ParseCallback;
import com.everyone.android.callback.ResultCallback;
  
/**
 * 功能描述：通過(guò)HTTP協(xié)議發(fā)送POST請(qǐng)求
 * @author android_ls
 *
 */
public class AsyncHttpPost extends AsyncBaseRequest {
  
    /**
     *
     */
    private static final long serialVersionUID = 3L;
  
    public AsyncHttpPost(String url, Map<String, String> parameter,
            ParseCallback handler, ResultCallback requestCallback) {
        super(url, parameter, handler, requestCallback);
    }
  
    @Override
    protected InputStream getRequestResult() throws IOException {
        StringBuilder sb = new StringBuilder();
        if(parameter!=null && !parameter.isEmpty()){
            for(Map.Entry<String, String> entry : parameter.entrySet()){
                sb.append(entry.getKey()).append('=')
                    .append(URLEncoder.encode(entry.getValue(), HTTP.UTF_8)).append('&');
            }
            sb.deleteCharAt(sb.length()-1);
        }
          
        // 得到實(shí)體的二進(jìn)制數(shù)據(jù)
        byte[] entitydata = sb.toString().getBytes();
        URL url = new URL(requestUrl);
        mHttpURLConn = (HttpURLConnection)url.openConnection();
        mHttpURLConn.setRequestMethod("POST");
        mHttpURLConn.setConnectTimeout(5 * 1000);
        // 如果通過(guò)post提交數(shù)據(jù)，必須設(shè)置允許對(duì)外輸出數(shù)據(jù)
        mHttpURLConn.setDoOutput(true);
        mHttpURLConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        mHttpURLConn.setRequestProperty("Content-Length", String.valueOf(entitydata.length));
        OutputStream outStream = mHttpURLConn.getOutputStream();
        outStream.write(entitydata);
        outStream.flush();
        outStream.close();
        if(mHttpURLConn.getResponseCode()== HttpURLConnection.HTTP_OK){
            return mHttpURLConn.getInputStream();
        }
        return null;
    }
  
}

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