Android Open Source - HarvestAndroid A P I Base

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
    This file is part of Harvest Android Client.
// w w w .ja  v a2  s. c om
    Harvest Android Client 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.

    Harvest Android Client 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 Harvest Android Client.  If not, see <http://www.gnu.org/licenses/>.
    
    Copyright (c) 2010 Mark Jackson <mdj at educomgov.org>
*/
package com.getharvest.mobile.android.client.api;

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

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import biz.source_code.base64Coder.Base64Coder;

import com.getharvest.mobile.android.client.LoginActivity;

import android.os.Handler;
import android.util.Log;


public abstract class APIBase implements Runnable {
  
  private HttpURLConnection http;
  private Handler handler;
  private APIListener listener;
  
  protected static enum Method { GET, POST };
  
  protected APIBase(APIListener l) {
    handler = new Handler();
    listener = l;
  }
  
  protected void setup() {
    try {
      URL server = new URL("http://" + LoginActivity.url + ".harvestapp.com" + getUrl());
      Log.d(getClass().getCanonicalName(), "URL=" + server.toString());
      http = (HttpURLConnection)server.openConnection();
      if (method() == Method.GET)
        http.setRequestMethod("GET");
      if (method() == Method.POST)
        http.setRequestMethod("POST");
      http.setDoInput(true);
      http.setDoOutput(true);
      http.setReadTimeout(4000);
      http.setRequestProperty("Accept", "application/xml");
      http.setRequestProperty("Content-Type", "application/xml");
      http.setRequestProperty("Authorization", "Basic " + Base64Coder.encodeString(
          LoginActivity.email + ":" + LoginActivity.password));
      http.setRequestProperty("User-Agent", "");
      http.getOutputStream().write(sendBytes());
    } catch (MalformedURLException e) {
      Log.e(getClass().getCanonicalName(), e.getMessage());
      throw new RuntimeException(e);
    } catch (IOException e) {
      Log.e(getClass().getCanonicalName(), e.getMessage());
      throw new RuntimeException(e);
    }
  }
  
  public void run() {
    try {
      http.connect();
      http.getOutputStream().close();
      int code = http.getResponseCode();
      if (code >= 200 && code < 300) {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();
        boolean test = false;
        if (test) {
          Log.e("Mark","printing input stream");
          BufferedReader in = new BufferedReader(new InputStreamReader(http.getInputStream()));
          String line = null;
          while((line = in.readLine()) != null) {
            System.err.println(line);
          }
          Log.e("Mark","done printing input stream");
        }
        Document dom = builder.parse(http.getInputStream());
        parseDocument(dom);
        final APIBase base = this;
        handler.post(new Runnable() {
          @Override public void run() {
            listener.connectSuccess(base);
          }
        });
        return;
      } else
        Log.e(getClass().getCanonicalName(), "Could not connect to server");
    } catch (IOException e) {
      Log.e(getClass().getCanonicalName(), e.getMessage());
    } catch (ParserConfigurationException e) {
      Log.e(getClass().getCanonicalName(), e.getMessage());
    } catch (SAXException e) {
      Log.e(getClass().getCanonicalName(), e.getMessage());
    }
    handler.post(new Runnable() {
      @Override public void run() {
        listener.connectFailure();
      }
    });
  }
  
  abstract protected Method method();
  abstract protected String getUrl();
  abstract protected byte[] sendBytes();
  abstract protected void parseDocument(Document dom);
  
  protected String getNodeText(Node n) {
    NodeList nl = n.getChildNodes();
    String ret = new String();
    for (int i=0; i<nl.getLength(); i++) {
      Node tn = nl.item(i);
      if (tn.getNodeType() == Node.TEXT_NODE) {
        ret += tn.getNodeValue();
      }
    }
    return ret;
  }
  
}

Java Source Code List

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