src/ro/ieval/fonbot/SendHttpMessageAsyncTask.java

   1 package ro.ieval.fonbot;
   2
   3 import static ro.ieval.fonbot.R.string.*;
   4
   5 import static ro.ieval.fonbot.Utils.toNonNull;
   6
   7 import java.io.OutputStream;
   8 import java.net.HttpURLConnection;
   9 import java.net.URL;
  10 import java.util.Collection;
  11
  12 import org.eclipse.jdt.annotation.Nullable;
  13
  14 import android.content.Context;
  15 import android.content.Intent;
  16 import android.os.AsyncTask;
  17 import android.util.Log;
  18
  19 /*
  20  * Copyright © 2013 Marius Gavrilescu
  21  *
  22  * This file is part of FonBot.
  23  *
  24  * FonBot is free software: you can redistribute it and/or modify
  25  * it under the terms of the GNU General Public License as published by
  26  * the Free Software Foundation, either version 3 of the License, or
  27  * (at your option) any later version.
  28  *
  29  * FonBot is distributed in the hope that it will be useful,
  30  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  31  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  32  * GNU General Public License for more details.
  33  *
  34  * You should have received a copy of the GNU General Public License
  35  * along with FonBot.  If not, see <http://www.gnu.org/licenses/>.
  36  */
  37
  38 /**
  39  * AsyncTask that sends a HTTP request to the server and broadcasts back the response message & response code
  40  *
  41  * @author Marius Gavrilescu <marius@ieval.ro>
  42  */
  43 public final class SendHttpMessageAsyncTask extends AsyncTask<String, Void, String> {
  44         /**
  45          * Extra: the response message
  46          */
  47         public static final String EXTRA_RESPONSE_MESSAGE="response_message";
  48         /**
  49          * Extra: the response code
  50          */
  51         public static final String EXTRA_RESPONSE_CODE="response_code";
  52
  53         /**
  54          * List of extra request headers.
  55          */
  56         private final Collection<Header> headers;
  57         /**
  58          * Action to send back in the response broadcast
  59          */
  60         private final String broadcast;
  61         /**
  62          * Context instance used by this class
  63          */
  64         private final Context context;
  65         /**
  66          * Data to send to the server
  67          */
  68         private final byte[] data;
  69         /**
  70          * Response code from the server
  71          */
  72         private int responseCode;
  73
  74         /**
  75          * Constructs a SendHttpMessageAsyncTask which sends a string-based message and does not broadcast the response.
  76          *
  77          * @param headers the extra headers
  78          * @param context the context instance
  79          */
  80         public SendHttpMessageAsyncTask(final Collection<Header> headers, final Context context){
  81                 super();
  82                 this.headers=headers;
  83                 this.broadcast=null;//NOPMD final field
  84                 this.context=context;
  85                 this.data=null;//NOPMD final field
  86         }
  87
  88         /**
  89          * Constructs a SendHttpMessageAsyncTask which sends a binary message and does not broadcast the response.
  90          *
  91          * @param headers the extra headers
  92          * @param context the context instance
  93          * @param data the message to send
  94          */
  95         public SendHttpMessageAsyncTask(final Collection<Header> headers, final Context context, final byte[] data){//NOPMD array is supposed to be immutable.
  96                 super();
  97                 this.headers=headers;
  98                 this.broadcast=null;//NOPMD final field
  99                 this.context=context;
 100                 this.data=data;
 101         }
 102
 103         /**
 104          * Constructs a SendHttpMessageAsyncTask which sends a string-based message and broadcasts the response.
 105          *
 106          * @param headers the extra headers
 107          * @param broadcast the broadcast to send
 108          * @param context the context instance
 109          */
 110         public SendHttpMessageAsyncTask(final Collection<Header> headers, final String broadcast, final Context context){
 111                 super();
 112                 this.headers=headers;
 113                 this.broadcast=broadcast;
 114                 this.context=context;
 115                 this.data=null;//NOPMD final field
 116         }
 117
 118         @Override
 119         protected String doInBackground(final @Nullable String... args) {
 120                 if(args==null)
 121                         return "";
 122
 123                 final byte[] msg;
 124                 if(data==null)
 125                         msg=Utils.join(" ", args).getBytes();
 126                 else
 127                         msg=data;
 128
 129                 try {
 130                         final URL url=new URL("http://ieval.ro:7777/");
 131                         final HttpURLConnection conn=(HttpURLConnection) url.openConnection();
 132                         conn.setDoOutput(true);
 133                         conn.setFixedLengthStreamingMode(msg.length);
 134                         conn.setRequestProperty("X-ID", FonBotApplication.instance.regID);
 135                         for (Header header : headers)
 136                                 conn.setRequestProperty(header.name, header.value);
 137                         conn.connect();
 138                         final OutputStream stream=conn.getOutputStream();
 139                         stream.write(msg);
 140                         stream.close();
 141                         Log.d(getClass().getName(),"HTTP Response: "+conn.getResponseCode()+" "+conn.getResponseMessage());
 142                         conn.disconnect();
 143                         final String message=conn.getResponseMessage();
 144                         responseCode=conn.getResponseCode();
 145                         if(message==null)
 146                                 return toNonNull(context.getString(no_response_returned_from_server));
 147                         return Utils.parseHttpMessage(message);
 148                 } catch (Exception e) {
 149                         return toNonNull(context.getString(connection_error));
 150                 }
 151         }
 152
 153         @Override
 154         protected void onPostExecute(final @Nullable String result) {
 155                 super.onPostExecute(result);
 156                 if(broadcast!=null){
 157                         final Intent intent=new Intent(broadcast);
 158                         intent.putExtra(EXTRA_RESPONSE_MESSAGE, result);
 159                         intent.putExtra(EXTRA_RESPONSE_CODE, responseCode);
 160                         context.sendBroadcast(intent);
 161                 }
 162         }
 163 }