fm.krui.kruifm.HTTPConnection.java Source code

Introduction

Here is the source code for fm.krui.kruifm.HTTPConnection.java

Source

/*
 * fm.krui.kruifm.HTTPConnection - HTTPConnection.java
 *
 * (C) 2013 - Tony Andrys
 * http://www.tonyandrys.com
 *
 * Created: 11/14/2013
 *
 * ---
 *
 * This file is part of KRUI.FM.
 *
 * KRUI.FM is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or(at your option) any later version.
 *
 * KRUI.FM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with KRUI.FM.  If not, see <http://www.gnu.org/licenses/>.
 */

package fm.krui.kruifm;

import android.net.http.AndroidHttpClient;
import android.os.AsyncTask;
import android.util.Log;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpRequestBase;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
 * fm.krui.kruifm - HTTPConnection
 *
 * @author Tony Andrys
 *         Created: 08/30/2013
 *         (C) 2013 - Tony Andrys
 */

/**
 * Executes an HTTP Connection using the passed client and request type (POST, GET, PUT, DELETE).
 * When operation is finished, the response is sent via callback to the passed HTTPConnectionListener.
 */
public class HTTPConnection extends AsyncTask<Void, String, String> {

    final static String TAG = HTTPConnection.class.getName();
    protected AndroidHttpClient httpClient;
    protected HttpRequestBase httpRequest;
    protected HTTPConnectionListener callbackListener;

    public HTTPConnection(AndroidHttpClient httpClient, HttpRequestBase httpRequest,
            HTTPConnectionListener listener) {
        this.httpClient = httpClient;
        this.httpRequest = httpRequest;
        this.callbackListener = listener;
    }

    @Override
    protected String doInBackground(Void... voids) {
        String serverResponse = null;
        String callbackName = callbackListener.getClass().getName();
        Log.v(TAG, "** Callback listener is set to " + callbackName);

        try {
            Log.i(TAG, "Executing the HTTP " + httpRequest.getMethod() + " request to "
                    + httpRequest.getURI().toString());
            HttpResponse response;
            response = httpClient.execute(httpRequest);

            // Grab the returned string as it is returned and make it a String to save memory.
            StringBuilder stringBuilderResponse = inputStreamToString(response.getEntity().getContent());
            serverResponse = stringBuilderResponse.toString();

            // Log the response.
            Log.i(TAG, "** HTTP Response returned: " + response.getStatusLine().getStatusCode() + " - "
                    + response.getStatusLine().getReasonPhrase());
            Log.i(TAG, "** " + response.getStatusLine().getStatusCode() + " - "
                    + response.getStatusLine().getReasonPhrase());
            Log.i(TAG, "Response body: " + serverResponse);
            httpClient.close();
            return serverResponse;

        } catch (IOException e) {
            Log.e(TAG, "Error when executing HTTP " + httpRequest.getMethod() + " request!");
            e.printStackTrace();
            httpClient.close();
            return serverResponse;
        }
    }

    @Override
    protected void onPostExecute(String result) {
        callbackListener.onConnectionFinish(result);
    }

    /**
     * Convenience method for converting InputStreams to human readable strings.
     *
     * @param is InputStream with text to convert
     * @return String containing InputStream's content
     */
    private StringBuilder inputStreamToString(InputStream is) {

        String line = "";
        StringBuilder total = new StringBuilder();

        // Wrap a BufferedReader around the passed InputStream
        BufferedReader rd = new BufferedReader(new InputStreamReader(is));

        // Read entire response until there is no more to parse.
        try {
            while ((line = rd.readLine()) != null) {
                total.append(line);
            }
        } catch (IOException e) {
            Log.e(TAG, "IOException caught when translating InputStream to String!");
            e.printStackTrace();
            return total;
        }

        // Finally, return the full string.
        return total;

    }
}