HttpCallExecutableRunnable.java

   1 package ro.ieval.fonbot;
   2
   3 import static ro.ieval.fonbot.R.string.*;
   4 import static ro.ieval.fonbot.Utils.toNonNull;
   5
   6 import java.io.InputStream;
   7 import java.io.OutputStream;
   8 import java.net.URL;
   9 import java.util.Collection;
  10
  11 import java.net.HttpURLConnection;
  12 import org.eclipse.jdt.annotation.Nullable;
  13
  14 import android.content.Context;
  15 import android.preference.PreferenceManager;
  16 import android.util.Base64;
  17 import android.util.Log;
  18
  19 import com.google.android.gcm.GCMRegistrar;
  20
  21 /*
  22  * Copyright © 2013 Marius Gavrilescu
  23  *
  24  * This file is part of FonBot.
  25  *
  26  * FonBot is free software: you can redistribute it and/or modify
  27  * it under the terms of the GNU General Public License as published by
  28  * the Free Software Foundation, either version 3 of the License, or
  29  * (at your option) any later version.
  30  *
  31  * FonBot is distributed in the hope that it will be useful,
  32  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  33  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  34  * GNU General Public License for more details.
  35  *
  36  * You should have received a copy of the GNU General Public License
  37  * along with FonBot.  If not, see <http://www.gnu.org/licenses/>.
  38  */
  39
  40 /**
  41  * ExecutableRunnable that makes a HTTP(S) call to the server and hands the response to a callback
  42  *
  43  * @author Marius Gavrilescu <marius@ieval.ro>
  44  */
  45 public final class HttpCallExecutableRunnable extends ExecutableRunnable{
  46
  47         /**
  48          * Callback which is run after a HTTP call.
  49          *
  50          * @author Marius Gavrilescu
  51          */
  52         public interface ResultCallback{
  53                 /**
  54                  * Callback invoked if the HTTP call is successful.
  55                  *
  56                  * @param responseCode HTTP response code
  57                  * @param responseMessage HTTP response message
  58                  * @param inputStream HTTP content InputStream
  59                  */
  60                 void onResult(final int responseCode, final String responseMessage, final InputStream inputStream);
  61                 /**
  62                  * Callback invoked if the HTTP call is unsuccessful.
  63                  *
  64                  * @param error localized error message
  65                  */
  66                 void onError(final String error);
  67         }
  68
  69         /**
  70          * List of extra request headers.
  71          */
  72         private final Collection<Header> headers;
  73         /**
  74          * Context instance used by this class
  75          */
  76         private final Context context;
  77         /**
  78          * Data to send to the server
  79          */
  80         private final byte[] data;
  81         /**
  82          * Server URL path
  83          */
  84         private final String path;
  85         /**
  86          * Callback to run after the request returns
  87          */
  88         private final ResultCallback callback;
  89         /** If true, the task should be retried if it fails */
  90         private final boolean mustRetryTask;
  91
  92         /**
  93          * Constructs a SendHttpMessageAsyncTask which sends a binary message.
  94          *
  95          * @param path URL path
  96          * @param headers the extra headers
  97          * @param context the context instance
  98          * @param resultCallback {@link ResultCallback} instance
  99          * @param mustRetryTask true if this task should be retried if it fails
 100          * @param data the message to send
 101          */
 102         public HttpCallExecutableRunnable(final String path, final @Nullable Collection<Header> headers, final Context context, final @Nullable ResultCallback resultCallback, final boolean mustRetryTask, final byte[] data){//NOPMD array is supposed to be immutable.
 103                 this.path=path;
 104                 this.headers=headers;
 105                 this.context=context;
 106                 this.callback=resultCallback;
 107                 this.mustRetryTask=mustRetryTask;
 108                 this.data=data;
 109         }
 110
 111         /**
 112          * Constructs a SendHttpMessageAsyncTask which sends a text message.
 113          *
 114          * @param path URL path
 115          * @param headers the extra headers
 116          * @param context the context instance
 117          * @param resultCallback {@link ResultCallback} instance
 118          * @param mustRetryTask true if this task should be retried if it fails
 119          * @param message message to send
 120          */
 121         public HttpCallExecutableRunnable(final String path, final @Nullable Collection<Header> headers, final Context context, final @Nullable ResultCallback resultCallback, final boolean mustRetryTask, final String... message){
 122                 this.path=path;
 123                 this.headers=headers;
 124                 this.context=context;
 125                 this.callback=resultCallback;
 126                 this.mustRetryTask=mustRetryTask;
 127                 if(message.length == 0)
 128                         this.data=null;//NOPMD final field
 129                 else
 130                         this.data=Utils.join(" ", message).getBytes();
 131         }
 132
 133         @Override
 134         public void run() {
 135                 try {
 136                         final URL url=Utils.getServerURL(toNonNull(context),toNonNull(path));
 137                         final HttpURLConnection conn=(HttpURLConnection) url.openConnection();
 138                         if(data!=null){
 139                                 conn.setDoOutput(true);
 140                                 conn.setFixedLengthStreamingMode(data.length);
 141                         }
 142                         conn.setRequestProperty("X-ID", GCMRegistrar.getRegistrationId(context));
 143                         final String user=PreferenceManager.getDefaultSharedPreferences(context).getString("username", null);
 144                         final String password=PreferenceManager.getDefaultSharedPreferences(context).getString("password", null);
 145                         if(user == null || password == null){
 146                                 if(callback!=null)
 147                                         callback.onError(toNonNull(context.getString(user_or_password_not_set)));
 148                                 return;
 149                         }
 150
 151                         conn.setRequestProperty("Authorization", "Basic "+Base64.encodeToString(
 152                                         (user+':'+password).getBytes(), Base64.NO_WRAP));
 153                         if(headers != null)
 154                                 for (final Header header : headers)
 155                                         conn.setRequestProperty(header.name, header.value);
 156                         conn.connect();
 157                         if(data!=null){
 158                                 final OutputStream stream=conn.getOutputStream();
 159                                 stream.write(data);
 160                                 stream.close();
 161                         }
 162                         Log.d(getClass().getName(),"HTTP Response: "+conn.getResponseCode()+" "+conn.getResponseMessage());
 163                         String message=conn.getResponseMessage();
 164                         if(message==null && callback != null)
 165                                 callback.onError(toNonNull(context.getString(no_response_returned_from_server)));
 166                         else if(message != null && callback != null){
 167                                 if(message.charAt(message.length()-1) == ')')//message is (something)
 168                                         message=message.substring(1, message.length()-1);
 169                                 else
 170                                         message=message.substring(message.indexOf(')')+2);
 171                                 callback.onResult(conn.getResponseCode(), message, conn.getResponseCode() == 200 ? conn.getInputStream() : null);
 172                         }
 173                         conn.disconnect();
 174                 } catch (Exception e) {
 175                         e.printStackTrace();
 176                         if(callback != null)
 177                                 callback.onError(toNonNull(context.getString(connection_error)));
 178                         if(mustRetryTask)
 179                                 retry();
 180                 }
 181         }
 182 }