Android Open Source - Torch Server Thread

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.aktarer.torch;
/* w ww.  j  a  v a 2 s. c om*/
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import java.nio.ByteBuffer;
import java.util.LinkedList;
import java.util.StringTokenizer;

import android.content.Context;
import android.util.Log;

import com.aktarer.torch.features.Battery;
import com.aktarer.torch.features.Camcorder;
import com.aktarer.torch.features.Info;
import com.aktarer.torch.features.Listen;
import com.aktarer.torch.features.Snapshot;

public class ServerThread extends Thread {
  protected Socket socket = null;
  protected Context context = null;
  protected DataOutputStream out;
  protected BufferedReader in;
  protected String path[];
  protected String contentType = "text/html";
  protected LinkedList<byte[]> buffer;

  protected byte[] buffered;

  protected boolean multipart = false;
  protected boolean headerSent = false;

  protected int BUFFER_SIZE = 1024;

  public ServerThread(Socket s, Context c, LinkedList<byte[]> b) {
    Log.i("BackgroundService", "Received request");
    socket = s;
    context = c;
    buffer = b;
  }

  public ServerThread(Socket s, Context c, byte[] data) {
    Log.i("BackgroundService", "Received request");
    socket = s;
    context = c;

    setImageOutput();
    buffered = data;
  }

  protected void process() throws Exception {
    Log.i("BackgroundService", "Request for: "
        + (path.length <= 1 ? "index" : path[1]));

    if (path.length <= 1) {
      Info request = new Info(context, this);
    } else if (path[1].equals("battery")) {
      Battery request = new Battery(context, this);
    } else if (path[1].equals("snapshot")) {
      Snapshot request = new Snapshot(context, this,
          (path.length >= 3 && path[2].equals("front")));

      synchronized (this) {
        this.wait(5000);

        byte[] data = "failure".getBytes();

        if (buffer.size() > 0) {
          data = buffer.removeFirst();
        }

        send(data);
      }
    } else if (path[1].equals("camera")) {
      Camcorder request = new Camcorder(context, this,
          (path.length >= 3 && path[2].equals("front")));

      multipart = true;

      while (true) {
        synchronized (this) {
          this.wait(5000);
  
          if (buffer.size() == 0) {
//            send("done".getBytes());
            break;
          }
  
          byte[] data = buffer.removeFirst();
  
          send(data);
          send("--my_mjpeg\r\n".getBytes());
//          send("Received frame\r\n".getBytes());
//          break;
        }
      }
    } else if (path[1].equals("listen")) {
      Listen request = new Listen(context, this);
    } else {
      send("Invalid request!");
    }
  }

  public void setJSONOutput() {
    contentType = "application/json";
  }

  public void setImageOutput() {
    contentType = "image/jpeg";
  }

  public void setAudioOutput() {
    contentType = "audio/wav";
  }

  public void setMultipart() {
    multipart = true;
  }

  protected void sendHeaders() throws Exception {
    if (!headerSent) {
      String header = "HTTP/1.1 200 OK\r\n";

      if (multipart) {
        header += "Content-Type: multipart/x-mixed-replace; boundary=my_mjpeg\r\n";
        header += "--my_mjpeg\r\n";
      }

      out.write(header.getBytes());
    }

    if (!headerSent || multipart) {
//      String header = "";
      String header = "Content-Type: " + contentType + "\r\n";
      header += "\r\n";
      out.write(header.getBytes());
    }

    headerSent = true;
  }

  public void send(String data) throws Exception {
    send(data, false);
  }

  public void send(String data, boolean continuous) throws Exception {
    send(data.getBytes(), continuous);
  }

  public void send(byte[] data) throws Exception {
    send(data, false);
  }

/*  public void send(short[] data, boolean continuous) throws Exception {
    byte bytes[] = new byte[data.length * 2];
    ByteBuffer.wrap(bytes).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer()
        .put(data);

    send(bytes, true);
  }*/

  public void send(byte[] data, boolean continuous) throws Exception {
    Log.i("BackgroundService", "Sending Data");

    sendHeaders();

    out.write(data);
    out.flush();

    if (!continuous && !multipart) {
      close();
    }
  }
  
  public void send(int data, boolean continuous) throws Exception {
    Log.i("BackgroundService", "Sending Data");

    sendHeaders();

    out.write(data);
    out.flush();

    if (!continuous && !multipart) {
      close();
    }
  }

  public void close() throws Exception {
    Log.i("BackgroundService", "Closing socket");

    if (out != null) {
      Log.i("BackgroundService", "Closing output");
      out.close();
    }

    if (in != null) {
      Log.i("BackgroundService", "Closing input");
      in.close();
    }

    if (socket != null) {
      Log.i("BackgroundService", "Closing socket");

      socket.close();
    }
  }

  public void run() {
    try {
      out = new DataOutputStream(socket.getOutputStream());
      in = new BufferedReader(new InputStreamReader(
          socket.getInputStream()));

      if (buffered != null) {
        try {
          send(buffered);
        } catch (Exception e) {
          e.printStackTrace();
        }

        return;
      }

      String inputLine, outputLine;
      int cnt = 0;

      while ((inputLine = in.readLine()) != null) {
        try {
          StringTokenizer tok = new StringTokenizer(inputLine);
          tok.nextToken();
        } catch (Exception e) {
          break;
        }

        if (cnt == 0) {
          String[] tokens = inputLine.split(" ");
          path = tokens[1].split("/");

          try {
            process();
          } catch (Exception e) {
            Log.i("BackgroundService", "ServerThread Exception");
            e.printStackTrace();
          }
        }

        cnt++;
      }
    } catch (IOException e) {
    }
  }
}

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