com.paypal.example.android.ppaccess.http.AsyncConnection.java Source code

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Here is the source code for com.paypal.example.android.ppaccess.http.AsyncConnection.java

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/*
 * Copyright 2012 PayPal.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.paypal.example.android.ppaccess.http;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.http.protocol.HTTP;

import android.os.AsyncTask;

/**
 * This {@link AsyncTask} was designed to handle POST and GET operations and
 * return the results to a defined listener.
 * 
 * @author tmesserschmidt@paypal.com
 * 
 */
public class AsyncConnection extends AsyncTask<String, Void, String> {
    public static final String METHOD_GET = "GET";
    public static final String METHOD_POST = "POST";

    private AsyncConnectionListener listener;

    public AsyncConnection(AsyncConnectionListener listener) {
        this.listener = listener;
    }

    @Override
    public String doInBackground(String... params) {
        final String method = params[0];
        final String urlString = params[1];

        final StringBuilder builder = new StringBuilder();

        try {
            final URL url = new URL(urlString);

            final HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod(method);

            if (method.equals(METHOD_POST)) {
                final String urlParams = params[2];
                conn.setRequestProperty(HTTP.CONTENT_LEN, "" + Integer.toString(urlParams.getBytes().length));
                System.out.println(urlParams);
                // Send request
                final DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
                wr.writeBytes(urlParams);
                wr.flush();
                wr.close();
            }

            // Get Response
            final InputStream is = conn.getInputStream();
            final BufferedReader rd = new BufferedReader(new InputStreamReader(is));

            String line;
            while ((line = rd.readLine()) != null) {
                builder.append(line);
            }
            rd.close();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return builder.toString();
    }

    @Override
    public void onPostExecute(String result) {
        listener.connectionDone(result);
    }

    public interface AsyncConnectionListener {
        public void connectionDone(String result);
    }
}