org.privatenotes.sync.web.WebConnection.java Source code

Introduction

Here is the source code for org.privatenotes.sync.web.WebConnection.java

Source

/*
 * Tomdroid
 * Tomboy on Android
 * http://www.launchpad.net/tomdroid
 * 
 * Copyright 2009, Benoit Garret <benoit.garret_launchpad@gadz.org>
 * 
 * This file is part of Tomdroid.
 * 
 * Tomdroid 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.
 * 
 * Tomdroid 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 Tomdroid.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.privatenotes.sync.web;

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

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.DefaultHttpClient;
import org.privatenotes.ui.Tomdroid;

import android.util.Log;

public abstract class WebConnection {

    private static final String TAG = "WebConnection";

    public abstract String get(String uri) throws UnknownHostException;

    public abstract String put(String uri, String data) throws UnknownHostException;

    private static String convertStreamToString(InputStream is) {
        /*
         * To convert the InputStream to String we use the BufferedReader.readLine()
         * method. We iterate until the BufferedReader return null which means
         * there's no more data to read. Each line will appended to a StringBuilder
         * and returned as String.
         */
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();

        String line = null;
        try {
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return sb.toString();
    }

    protected String parseResponse(HttpResponse response) {

        if (response == null)
            return "";

        String result = null;

        // Examine the response status
        if (Tomdroid.LOGGING_ENABLED)
            Log.i(TAG, "Response status : " + response.getStatusLine().toString());

        // Get hold of the response entity
        HttpEntity entity = response.getEntity();
        // If the response does not enclose an entity, there is no need
        // to worry about connection release

        if (entity != null) {

            try {
                InputStream instream;

                instream = entity.getContent();

                result = convertStreamToString(instream);

                if (Tomdroid.LOGGING_ENABLED)
                    Log.i(TAG, "Received : " + result);

                // Closing the input stream will trigger connection release
                instream.close();

            } catch (IllegalStateException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

        return result;
    }

    protected HttpResponse execute(HttpUriRequest request) throws UnknownHostException {

        DefaultHttpClient httpclient = new DefaultHttpClient();

        try {
            // Execute the request
            HttpResponse response = httpclient.execute(request);
            return response;

        } catch (UnknownHostException e) {
            throw e;
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        }

        return null;
    }
}