I am developing a android app which turns the android device into a multithreaded web server the code which i use do not have any error but runs fine and it can be seen through web browser but it shows the source of html file as text rather than full gui.
this is my code..
Jhtts class:
package dolphin.developers.com;
import java.io.File;
import java.io.IOException;
import java.net.InetAddress;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.widget.Toast;
import dolphin.devlopers.com.R;
public class JHTTS extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.server);
try {
String IndexFileName = "index.htm";
File documentRootDirectory = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/");
JHTTP j = new JHTTP(documentRootDirectory, 9001, IndexFileName);
j.start();
Toast.makeText(getApplicationContext(), "Server Started!!", 5).show();
Log.d("Server Rooot", "" + documentRootDirectory);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
Jhttp class:
package dolphin.developers.com;
import java.io.File;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
public class JHTTP extends Thread {
private File documentRootDirectory;
private String indexFileName = "index.htm";
private ServerSocket server;
private int numThreads = 50;
public JHTTP(File documentRootDirectory, int port, String indexFileName) throws IOException {
if (!documentRootDirectory.isDirectory()) {
throw new IOException(documentRootDirectory
+ " does not exist as a directory");
}
this.documentRootDirectory = documentRootDirectory;
this.indexFileName = indexFileName;
this.server = new ServerSocket(port);
}
public JHTTP(File documentRootDirectory, int port) throws IOException {
this(documentRootDirectory, port, "index.htm");
}
public JHTTP(File documentRootDirectory) throws IOException {
this(documentRootDirectory, 9001, "index.htm");
}
public void run() {
for (int i = 0; i < numThreads; i++) {
Thread t = new Thread(new RequestProcessor(documentRootDirectory, indexFileName));
t.start();
}
System.out.println("Accepting connections on port " + server.getLocalPort());
System.out.println("Document Root: " + documentRootDirectory);
while (true) {
try {
Socket request = server.accept();
request.setReuseAddress(true);
RequestProcessor.processRequest(request);
} catch (SocketException ex) {
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
RequestProcessor:
package dolphin.developers.com;
import java.net.*;
import java.io.*;
import java.util.*;
public class RequestProcessor implements Runnable {
#SuppressWarnings("rawtypes")
private static List pool = new LinkedList( );
private File documentRootDirectory;
private String indexFileName = "index.html";
public RequestProcessor(File documentRootDirectory,
String indexFileName) {
if (documentRootDirectory.isFile( )) {
throw new IllegalArgumentException(
"documentRootDirectory must be a directory, not a file");
}
this.documentRootDirectory = documentRootDirectory;
try {
this.documentRootDirectory
= documentRootDirectory.getCanonicalFile( );
}
catch (IOException ex) {
}
if (indexFileName != null) this.indexFileName = indexFileName;
}
#SuppressWarnings("unchecked")
public static void processRequest(Socket request) {
synchronized (pool) {
pool.add(pool.size( ), request);
pool.notifyAll( );
}
}
public void run( ) {
// for security checks
String root = documentRootDirectory.getPath( );
while (true) {
Socket connection;
synchronized (pool) {
while (pool.isEmpty( )) {
try {
pool.wait( );
}
catch (InterruptedException ex) {
}
}
connection = (Socket) pool.remove(0);
}
try {
String filename;
String contentType;
OutputStream raw = new BufferedOutputStream(
connection.getOutputStream( )
);
Writer out = new OutputStreamWriter(raw);
Reader in = new InputStreamReader(
new BufferedInputStream(
connection.getInputStream( )
),"ASCII"
);
StringBuffer requestLine = new StringBuffer( );
int c;
while (true) {
c = in.read( );
if (c == '\r' || c == '\n') break;
requestLine.append((char) c);
}
String get = requestLine.toString( );
// log the request
System.out.println(get);
StringTokenizer st = new StringTokenizer(get);
String method = st.nextToken( );
String version = "";
if (method.equals("GET")) {
filename = st.nextToken( );
if (filename.endsWith("/")) filename += indexFileName;
contentType = guessContentTypeFromName(filename);
if (st.hasMoreTokens( )) {
version = st.nextToken( );
}
File theFile = new File(documentRootDirectory,
filename.substring(1,filename.length( )));
if (theFile.canRead( )
// Don't let clients outside the document root
&& theFile.getCanonicalPath( ).startsWith(root)) {
DataInputStream fis = new DataInputStream(
new BufferedInputStream(
new FileInputStream(theFile)
)
);
byte[] theData = new byte[(int) theFile.length( )];
fis.readFully(theData);
fis.close( );
if (version.startsWith("HTTP ")) { // send a MIME header
out.write("HTTP/1.0 200 OK\r\n");
Date now = new Date( );
out.write("Date: " + now + "\r\n");
out.write("Server: JHTTP/1.0\r\n");
out.write("Content-length: " + theData.length + "\r\n");
out.write("Content-type: " + contentType + "\r\n\r\n");
out.flush( );
} // end if
// send the file; it may be an image or other binary data
// so use the underlying output stream
// instead of the writer
raw.write(theData);
raw.flush( );
} // end if
else { // can't find the file
if (version.startsWith("HTTP ")) { // send a MIME header
out.write("HTTP/1.0 404 File Not Found\r\n");
Date now = new Date( );
out.write("Date: " + now + "\r\n");
out.write("Server: JHTTP/1.0\r\n");
out.write("Content-type: text/html\r\n\r\n");
}
out.write("<HTML>\r\n");
out.write("<HEAD><TITLE>File Not Found</TITLE>\r\n");
out.write("</HEAD>\r\n");
out.write("<BODY>");
out.write("<H1>HTTP Error 404: File Not Found</H1>\r\n");
out.write("</BODY></HTML>\r\n");
out.flush( );
}
}
else { // method does not equal "GET"
if (version.startsWith("HTTP ")) { // send a MIME header
out.write("HTTP/1.0 501 Not Implemented\r\n");
Date now = new Date( );
out.write("Date: " + now + "\r\n");
out.write("Server: JHTTP 1.0\r\n");
out.write("Content-type: text/html\r\n\r\n");
}
out.write("<HTML>\r\n");
out.write("<HEAD><TITLE>Not Implemented</TITLE>\r\n");
out.write("</HEAD>\r\n");
out.write("<BODY>");
out.write("<H1>HTTP Error 501: Not Implemented</H1>\r\n");
out.write("</BODY></HTML>\r\n");
out.flush( );
}
}
catch (IOException ex) {
}
finally {
try {
connection.close( );
}
catch (IOException ex) {}
}
} // end while
} // end run
public static String guessContentTypeFromName(String name) {
if (name.endsWith(".html") || name.endsWith(".htm")) {
return "text/html";
}
else if (name.endsWith(".txt") || name.endsWith(".java")) {
return "text/plain";
}
else if (name.endsWith(".gif")) {
return "image/gif";
}
else if (name.endsWith(".class")) {
return "application/octet-stream";
}
else if (name.endsWith(".jpg") || name.endsWith(".jpeg")) {
return "image/jpeg";
}
else if (name.endsWith(".png") ) {
return "image/png";
}
else if (name.endsWith(".js")) {
return "text/javascript";
}
else if (name.endsWith(".js")) {
return "text/javascript";
}
else if (name.endsWith(".css")) {
return "text/css";
}
else return "text/plain";
}
} // end RequestProcessor
Please Help...
Related
I'm trying to make a multiplayer game, but first i want to try it with a simple scanner and print code
i have two files, "cl.java" is the client , "server.java" is the server.
WHAT AM I TRYING TO DO ?
a client send a message to other client asking for a game
this initial message does not run in my code , i am thinking that i can not use the clientThread.sendText(un + " iWantToPlay"); outside the class ConnectThread
WHAT DO U THINK ?
the error happens on this code:
public void sendText(String text) {
try {
oos.writeObject(text);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
with the oos.writeObject(text);
this is Server.java
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
public class Server {
ServerSocket serverSocket;
ArrayList<ServerThread> allClients = new ArrayList<ServerThread>();
public static void main(String[] args) {
new Server();
}
public Server() {
// ServerSocket is only opened once !!!
try {
serverSocket = new ServerSocket(6000);
System.out.println("Waiting on port 6000...");
boolean connected = true;
// this method will block until a client will call me
while (connected) {
Socket singleClient = serverSocket.accept();
// add to the list
ServerThread myThread = new ServerThread(singleClient);
allClients.add(myThread);
myThread.start();
}
// here we also close the main server socket
serverSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
class ServerThread extends Thread {
Socket threadSocket;
String msg;
boolean isClientConnected;
InputStream input;
ObjectInputStream ois;
OutputStream output;
ObjectOutputStream oos; // ObjectOutputStream
public ServerThread(Socket s) {
threadSocket = s;
}
public void sendText(String text) {
try {
oos.writeObject(text);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void run() {
try {
input = threadSocket.getInputStream();
ois = new ObjectInputStream(input);
output = threadSocket.getOutputStream();
oos = new ObjectOutputStream(output);
// get the user name from the client and store
// it inside thread class for later use
// msg = (String) ois.readObject();
msg = (String) ois.readObject();
for (ServerThread t : allClients)
t.sendText(msg);
isClientConnected = true;
System.out.println("connect ... ");
// System.out.println(msg);
// for(ServerThread t:allClients)
// t.sendText("User has connected...");
// send this information to all users
// dos.writeUTF(userName + " has connected..");
// for(ServerThread t:allClients)
// t.sendText(msg);
while (isClientConnected) {
try {
msg = (String) ois.readObject();
System.out.println(msg);
for (ServerThread t : allClients)
t.sendText(msg);
} catch (Exception e) {
}
}
// close all resources (streams and sockets)
ois.close();
oos.close();
threadSocket.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
this is the cl.java
import java.io.*;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;
public class cl {
public static final String HOST = "127.0.0.1";
public static final int PORT = 6000;
static ConnectThread clientThread;
boolean isConnected;
static boolean isOnline = false;
static Scanner scanner = new Scanner(System.in);
static String msg;
static String un;
static String op = "none";
static int turn = 1;
public static void main(String[] args) {
boolean running = true;
System.out.print("Enter a username: ");
un = scanner.nextLine();
System.out.print("invite or wait ?");
msg = scanner.nextLine();
if (msg.equalsIgnoreCase("invite")) {
System.out.print("Enter an opponent: ");
op = scanner.nextLine();
}
new cl();
if (op.equalsIgnoreCase("amjad")) {
clientThread.sendText(un + " iWantToPlay");
}
}
public String getWord(String line,int i) {
String arr[] = line.split(" ", 2);
return arr[i];
}
public cl() {
connectUser();
}
public void connectUser() {
clientThread = new ConnectThread();
clientThread.start();
}
class ConnectThread extends Thread {
InputStream input;
OutputStream output;
ObjectOutputStream oos;
Socket s;
public void sendText(String text) {
try {
oos.writeObject(text);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void run() {
try {
s = new Socket(HOST, PORT);
output = s.getOutputStream();
oos = new ObjectOutputStream(output);
isOnline = true;
isConnected = true;
new ListenThread(s).start();
/* while (isOnline) {
msg = scanner.nextLine();
clientThread.sendText(un + ": " + msg);
}
*/
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
class ListenThread extends Thread {
Socket s;
InputStream input;
ObjectInputStream ois;
public ListenThread(Socket s) {
this.s = s;
try {
input = s.getInputStream();
ois = new ObjectInputStream(input);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void run() {
while (isConnected) {
try {
final String inputMessage = (String) ois.readObject();
String user;
user = getWord(inputMessage,1);
String message = getWord(inputMessage,2);
/*if (!user.equals(un)) {
System.out.println(inputMessage);
}*/
if (message.equalsIgnoreCase("iwanttoplay")) {
System.out.println(user + " wants to play, accept? y\n");
msg = scanner.nextLine();
clientThread.sendText(un + " " + msg);
}
else if (message.equalsIgnoreCase("yesiwanttoplay")) {
System.out.println(un + " accepted invitation, " + un + " against " + user);
turn = 1;
play(un,user);
}
else if (message.equalsIgnoreCase("noidontwanttoplay")) {
System.out.println(user + " denied invitation.. ");
}
else if (message.equalsIgnoreCase("x") || message.equalsIgnoreCase("o")) {
System.out.println(user + " played .. " + message);
turn = 1;
play(un,user);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
public void play(String me, String him) {
if (turn == 1) {
System.out.println("your turn,... play a move..x or o ..");
msg = scanner.nextLine();
clientThread.sendText(un + " " + msg);
turn = 2;
}
}
}
this is my error
Exception in thread "main" java.lang.NullPointerException
at cl$ConnectThread.sendText(cl.java:68)
at cl.main(cl.java:38)
xception in thread "main" java.lang.NullPointerException
at cl$ConnectThread.sendText(cl.java:68)
You should be able to figure this out yourself. The line in question appears to be
oos.writeObject(text);
and so clearly oos is null at that point.
You don't need StackOverflow to sort out NullPointerExceptions.
Here is my complete code that I use to download files from the internet in my Android app. The idea is to resume the download from where it left off when the app restarts / is restored.
package com.example.simpledownloader.task;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.concurrent.atomic.AtomicLong;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Environment;
import android.util.Log;
import com.example.simpledownloader.sharable.NetworkOptions;
import com.example.simpledownloader.sharable.Sharable;
public class Task extends Thread {
private String url = null;
private String name = null;
private AtomicLong contentLength = null;
private AtomicLong bytesWritten = null;
private boolean isReady = true;
private String errCode = new String("OK");
//------------------------------------------------------------------------------
public Task(String name, String url, long contentLength, long bytesWritten){
// Instantiate the variables
// The values here depend on whether the Task was created by TaskDAO
// or by clicking the download button
this.name = name;
this.url = url;
this.contentLength = new AtomicLong(contentLength);
this.bytesWritten = new AtomicLong(bytesWritten);
}
//------------------------------------------------------------------------------
#Override
public void run() {
File f = null;
RandomAccessFile rFile = null;
setReadiness(false);
Sharable.setShouldLook(false);
try {
String[] names = name.split("/");
if(names.length == 0){
// nothing
}else{
name = names[names.length-1];
}
Log.v("TASKPATH", "/sdcard/" + name);
f = new File("/sdcard/",name);
rFile = new RandomAccessFile(f, "rw");
writeToFile(rFile);
} catch (FileNotFoundException e) {
Log.v("TASK", e.getLocalizedMessage());
if(contentLength.get() == 0){ // new download will have content length set to zero
try {
f.createNewFile(); // make a new file
writeToFile(rFile);// start downloading
}catch (IOException e1) {
errCode = e1.getMessage(); // Unable to create file;
Log.v("TASK", "FILE DELETED");
Sharable.setShouldLook(true);
return;
}
}else{
errCode = "Created file has been deleted"; // File was previously created but now is not found.
Log.v("TASK", "FILE DELETED");
Sharable.setShouldLook(true);
return;
}
} catch (IOException e) {
errCode = e.getLocalizedMessage();
Sharable.setShouldLook(true);
Log.v("TASK", e.getLocalizedMessage());
}
}
//------------------------------------------------------------------------------
private void writeToFile(RandomAccessFile file){
NetworkInfo wifi = Sharable.connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
NetworkInfo mobile = Sharable.connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
URL u;
HttpURLConnection httpCon = null;
try {
byte[] buffer = new byte[2 * 1024]; // 2 MB buffer
long bytesWritten = 0;
if(contentLength.get() == 0){ // new file ?
u = new URL(url); // make a URL
httpCon = (HttpURLConnection) u.openConnection(); // Get ready to make a connection via HTTP
httpCon.setDoInput(true); // this connection will download data
httpCon.connect(); // make a connection
BufferedInputStream buf = new BufferedInputStream(httpCon.getInputStream()); // get a stream
contentLength.addAndGet(httpCon.getContentLength()); // set content length
while((bytesWritten = buf.read(buffer)) != -1 ){
if(Sharable.networkOption == NetworkOptions.WIFI_ONLY){
if(!wifi.isConnected()){ // check WiFi connectivity
setReadiness(false);
Sharable.setShouldLook(true);
break;
}
}
Log.v("TASK", "Writing at location " + this.bytesWritten.get());
file.write(buffer);
this.bytesWritten.addAndGet(bytesWritten);
String update = "UPDATE tasks SET byteswritten=" + this.bytesWritten.get() +
" ,contentlength=" + this.contentLength.get() +
" WHERE url='" + url + "'";
Sharable.db.execSQL(update); // write data to database
Sharable.handler.post(new Runnable(){
#Override
public void run() {
Sharable.adapter.notifyDataSetChanged(); // update the display
}
});
if(isInterrupted()){
setReadiness(true);
Sharable.setShouldLook(true);
break;
}
}
}else{ // not a new file
file.seek(this.bytesWritten.get()); // seek to proper position
u = new URL(url); // make a URL
httpCon = (HttpURLConnection) u.openConnection(); // Get ready to make a connection via HTTP
httpCon.setDoInput(true); // this connection will download data
httpCon.setRequestProperty("Range:", "bytes="+this.bytesWritten.get()+"-");
httpCon.connect(); // make a connection
if(httpCon.getResponseCode() != HttpURLConnection.HTTP_PARTIAL){ // check if partial download supported
errCode = "206 Not Supported";
setReadiness(false);
Sharable.setShouldLook(true);
return;
}
BufferedInputStream buf = new BufferedInputStream(httpCon.getInputStream()); // get a stream
while((bytesWritten = buf.read(buffer)) != -1 ){ // start downlading
if(Sharable.networkOption == NetworkOptions.WIFI_ONLY){
if(!wifi.isConnected()){ // check WiFi connectivity
setReadiness(false);
Sharable.setShouldLook(true);
if(httpCon != null){
httpCon.disconnect();
}
break;
}
}
Log.v("TASK", "Writing at location " + this.bytesWritten.get());
file.write(buffer);
this.bytesWritten.addAndGet(bytesWritten);
String update = "UPDATE tasks SET byteswritten=" + this.bytesWritten.get() +
" ,contentlength=" + this.contentLength.get() +
" WHERE url='" + url + "'";
Sharable.db.execSQL(update); // write data to database
Sharable.handler.post(new Runnable(){
#Override
public void run() {
Sharable.adapter.notifyDataSetChanged(); // update the display
}
});
if(isInterrupted()){ // check for thread interruption
setReadiness(true);
Sharable.setShouldLook(true);
break;
}
}
}
} catch (MalformedURLException e) {
errCode = e.getMessage();
Log.v("TASK", e.getLocalizedMessage());
} catch (IOException e) {
errCode = e.getLocalizedMessage();
Log.v("TASK", e.getLocalizedMessage());
}catch(Exception e){
errCode = e.getLocalizedMessage();
Log.v("TASK", e.getLocalizedMessage());
}
}
//------------------------------------------------------------------------------
public synchronized float getProgress(){
if(contentLength.get() != -1 && contentLength.get() != 0){
return (bytesWritten.get()*100)/contentLength.get();
}else{
return -1;
}
}
//------------------------------------------------------------------------------
public synchronized boolean getReadiness(){
return isReady;
}
//------------------------------------------------------------------------------
public synchronized void setReadiness(boolean ready){
isReady = ready;
}
//------------------------------------------------------------------------------
public synchronized String getStatus(){
return errCode;
}
//------------------------------------------------------------------------------
public synchronized String getTaskName(){
return name;
}
//------------------------------------------------------------------------------
#Override
public String toString(){
return name;
}
//------------------------------------------------------------------------------
}
The problem, however, is that the partial download never starts... I do not know why. I usually end up with no activity at all or with a 206 Not Supported error.
Other class that might interest you is the Sharable which contains singleton instances:
Sharable.java and Scheduler.java
How do I resume partial downloads ?
java.io.BufferedInputStream in = new java.io.BufferedInputStream(new
java.net.URL(args[1].toString()).openStream());
java.io.FileOutputStream fos = new java.io.FileOutputStream("WorldEdit/schematics/"+args[2].toString());
java.io.BufferedOutputStream bout = new BufferedOutputStream(fos,1024);
byte data[] = new byte[1024];
while(in.read(data,0,1024)>=0)
{
bout.write(data);
}
bout.close();
in.close();
}
I want this to download a file from a url, and put it into a folder. This program will be in a folder named "plugins" where I want to put the downloaded file is in "plugins/WorldEdit/schematic".
Doesn't seem to work. Any suggestions?
in.read returns a number indicating how many bytes were actually read. You are ignoring that number and assuming 1024 bytes are read on each call.
If you are using Java 7, you can save a URL to a file this way:
try (InputStream in = new URL(args[1].toString()).openStream()) {
Files.copy(in, Paths.get("WorldEdit", "schematics", args[2].toString()));
}
In Java 6 (and 5 and 4), you can use channels:
FileChannel fileChannel = fos.getChannel();
ReadableByteChannel urlChannel = Channels.newChannel(
new URL(args[1].toString()).openStream());
fileChannel.transferFrom(urlChannel, 0, Long.MAX_VALUE);
You can refer the following program and edit according to your needs.
In this program url is fetching from a table in an html file using Jsoup to parse the html file and downloading into different folder..path of the folder I took from the table(table has 3 column filename,path,download link) .
Go to downloadFile(String urlString) method,there you can find the answer for your question
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* #author nudanesh
*/
public class URLDownload {
private Document doc;
String url = "", folder, file;
private final File sourceFile;
int i = 1;
int r = 1, c = 1;
int anchorCol = 3;
Library lib;
URLDownload() {
lib = new Library();
sourceFile = new File("Download.html");
try {
doc = Jsoup.parse(sourceFile, "UTF-8");
} catch (IOException ex) {
Logger.getLogger(URLDownload.class.getName()).log(Level.SEVERE, null, ex);
}
//Elements links = doc.select("a[href]");
Elements rows = doc.select("tr");
System.out.println("Size=" + rows.size());
for (Element row : rows) {
Elements cols = row.getElementsByTag("td");
c = 1;
for (Element col : cols) {
System.out.println("Row"+r);
if (c == 1) {
file = col.text();//System.out.println("File in main"+file);
} else if (c == 2) {
folder = col.text();//System.out.println("Folder in main"+folder);
} else {
try {
url = col.getElementsByTag("a").attr("href");
} catch (Exception e) {
System.out.print("-");
}
}
c++;
}
if (!url.equals("")) {
lib.setLocation(file,folder);
lib.downloadFile(url);
}
url = "";
i++;
r++;
}
}
public static void main(String arg[]) {
new URLDownload();
}
}
and following is the Library class file
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.nio.file.Files;
import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* #author nudanesh
*/
public class Library {
boolean downloaded = false;
Thread t;
int waitTime = 0;
String baseLoc = "";
int size = 1024, ByteWritten = 0;
URL url;
URLConnection uCon = null;
String folderLoc = "", file = "firstFile.csv";
File loc;
private OutputStream outStream;
private InputStream is=null;
private byte[] buf;
private int ByteRead;
private int FolderInUrl = 4;
private boolean rootFolder = true;
private File resultFile;
private FileOutputStream fileResult;
private XSSFWorkbook workbookResult;
private XSSFSheet sheetResult;
private int updateExcelRowNum = -1;
private int updateExcelColNum = -1;
String date;
private int waitLimit = 900000;
Library() {
/*System.out.print(Calendar.getInstance().toString());
Date d=new Date();
String date=d.toString();
System.out.println(date);*/
//t = new Thread(this);
// t.start();
date = new SimpleDateFormat("yyyy_MM_dd_HH_mm_ss").format(Calendar.getInstance().getTime());
System.out.print(date);
baseLoc = date + "/";
WriteDataToExcel();
baseLoc += "Business Reports/";
createRowExcel(updateExcelRowNum);
updateRowColExcel(updateExcelRowNum, updateExcelColNum, "Report Name");
updateRowColExcel(updateExcelRowNum, updateExcelColNum, "Path");
updateRowColExcel(updateExcelRowNum, updateExcelColNum, "Status");
updateExcel();
}
public void setLocation(String a, String b) {
file = a;
file += ".csv";
folderLoc = baseLoc + getFolderPath(b);
// System.out.println("File Name: "+file);
// System.out.println("Folder loc: "+folderLoc);
}
public String getFolderPath(String b) {
String path = "";
try {
System.out.println("path" + b);
path = b;
// path = java.net.URLDecoder.decode(b, "UTF-8");
String p[] = path.split("/");
path = "";
for (int i = FolderInUrl; i < p.length - 1; i++) {
rootFolder = false;
p[i] = removeSpacesAtEnd(p[i]);
path = path + p[i] + "/";
}
} catch (Exception ex) {
Logger.getLogger(Library.class.getName()).log(Level.SEVERE, null, ex);
}
return path;
}
public void downloadFile(String urlString) {
// System.out.println("Started");
try {
url = new URL(urlString);
} catch (MalformedURLException ex) {
Logger.getLogger(Library.class.getName()).log(Level.SEVERE, null, ex);
}
try {
loc = new File(folderLoc);
if (!loc.exists()) {
loc.mkdirs();
}
outStream = new BufferedOutputStream(new FileOutputStream(folderLoc + file));
uCon = url.openConnection();
uCon.setReadTimeout(waitLimit);
is = uCon.getInputStream();
downloaded=true;
buf = new byte[size];
while ((ByteRead = is.read(buf)) != -1) {
System.out.println("while executing" + ByteRead);
outStream.write(buf, 0, ByteRead);
ByteWritten += ByteRead;
}
//System.out.println("Downloaded" + ByteWritten);
resetCounters();
createRowExcel(updateExcelRowNum);
updateRowColExcel(updateExcelRowNum, updateExcelColNum, file);
updateRowColExcel(updateExcelRowNum, updateExcelColNum, folderLoc);
if (ByteWritten < 1000) {
updateRowColExcel(updateExcelRowNum, updateExcelColNum, "Downloaded ");
} else {
updateRowColExcel(updateExcelRowNum, updateExcelColNum, "Downloaded ");
}
updateExcel();
} catch (Exception e) {
System.out.println("error catch" + e);
resetCounters();
createRowExcel(updateExcelRowNum);
updateRowColExcel(updateExcelRowNum, updateExcelColNum, file);
updateRowColExcel(updateExcelRowNum, updateExcelColNum, folderLoc);
updateRowColExcel(updateExcelRowNum, updateExcelColNum, "Rejected the Download after waiting " + (waitLimit / 60000) + " minutes");
updateExcel();
waitTime = 0;
} finally {
try {
System.out.println("Error in streams");
if(downloaded)
is.close();
outStream.close();
downloaded= false;
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void moveToFolder(String reportName, String path) {
try {
File repo = new File(folderLoc + "/" + reportName + ".csv");
path = folderLoc + "/" + path;
File pathFolder = new File(path);
if (!pathFolder.exists()) {
pathFolder.mkdirs();
}
pathFolder = new File(path + reportName + ".csv");
System.out.println("Path=" + pathFolder.getAbsolutePath() + "\nReport path=" + repo.getAbsolutePath());
System.out.println("Source" + repo.getAbsolutePath());
//System.out.println("Status" + repo.renameTo(new File(pathFolder.getAbsolutePath())));
System.out.println("Status" + Files.move(repo.toPath(), new File(pathFolder.getAbsolutePath()).toPath(), REPLACE_EXISTING));
//Files.
} catch (Exception e) {
System.out.println("error while moving" + e);
}
}
public String changeSpecialCharacters(String report) {
report = report.replaceAll(":", "_");
return report;
}
public String removeSpacesAtEnd(String inputPath) {
for (int i = inputPath.length() - 1; i >= 0; i--) {
if (inputPath.charAt(i) != ' ') {
break;
} else {
System.out.println("Before string is" + inputPath);
inputPath = inputPath.substring(0, i);
System.out.println("AFter string is" + inputPath);
}
}
return inputPath;
}
public void WriteDataToExcel() {
try {
// file = new FileInputStream(new File("config.xlsx"));
// File resultFolder = new File("Results");
// if (resultFolder.exists()) {
// deleteDirectory(resultFolder);
// }
// resultFolder.mkdirs();
if (!new File(baseLoc).exists()) {
new File(baseLoc).mkdirs();
}
resultFile = new File(baseLoc + "Reports info " + date + ".xlsx");
System.out.println("Path" + resultFile.getAbsolutePath());
resultFile.createNewFile();
// rFilePath = resultFile.getAbsolutePath();
fileResult = new FileOutputStream(resultFile);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//Get the workbook instance for XLS file
// System.out.println("file success");
XSSFWorkbook workbook = null;
try {
workbookResult = new XSSFWorkbook();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("Opening the browser");
//Get first sheet from the workbook
sheetResult = workbookResult.createSheet();
//sheetResult.set
//Get iterator to all the rows in current sheet
//Get iterator to all cells of current row
//ar.add(folderLocation);
// ar.add(firefoxProfileLocation);
}
public void updateExcel() {
try {
//fileResult.close();
fileResult = new FileOutputStream(resultFile);
workbookResult.write(fileResult);
fileResult.close();
} catch (Exception e) {
System.out.println(e);
}
}
public void createRowExcel(int num) {
updateExcelRowNum++;
num = updateExcelRowNum;
sheetResult.createRow(num);
}
public void updateRowColExcel(int rnum, int cnum, String value) {
updateExcelColNum++;
cnum = updateExcelColNum;
sheetResult.getRow(rnum).createCell(cnum);
XSSFCell cell = sheetResult.getRow(rnum).getCell(cnum);
cell.setCellValue(value);
}
public void updateColumn(int rnum, int cnum, String value) {
XSSFCell cell = sheetResult.getRow(rnum).getCell(cnum);
cell.setCellValue(value);
}
public void resetCounters() {
updateExcelColNum = -1;
}
/* #Override
public void run() {
while (true) {
if (true) {
waitTime += 1000;
System.out.println(waitTime);
if (waitTime > waitLimit) {
try {
is.close();
outStream.close();
//downloaded=false;
// cancelDownload=true;
} catch (Exception ex) {
Logger.getLogger(Library.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
try {
Thread.sleep(1000);
} catch (Exception e) {
}
}
}*/
}
i have written a java code to transfer files from one server to another using the concept of socket programming. now in the same code i also want to check for the network connection availability before each file is transferred. i also want that the files transferred should be transferred according to their numerical sequence. And while the files are being transferred the transfer progress of each file i.e the progress percentage bar should also be visible on the screen.
i will really appreciate if someone can help me with the code. i am posting the code i have written for file transfer.
ClientMain.java
import java.io.*;
import java.net.Socket;
import java.net.SocketException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
public class ClientMain {
private DirectoryTxr transmitter = null;
Socket clientSocket = null;
private boolean connectedStatus = false;
private String ipAddress;
String srcPath = null;
String dstPath = "";
public ClientMain() {
}
public void setIpAddress(String ip) {
this.ipAddress = ip;
}
public void setSrcPath(String path) {
this.srcPath = path;
}
public void setDstPath(String path) {
this.dstPath = path;
}
private void createConnection() {
Runnable connectRunnable = new Runnable() {
public void run() {
while (!connectedStatus) {
try {
clientSocket = new Socket(ipAddress, 3339);
connectedStatus = true;
transmitter = new DirectoryTxr(clientSocket, srcPath, dstPath);
} catch (IOException io) {
io.printStackTrace();
}
}
}
};
Thread connectionThread = new Thread(connectRunnable);
connectionThread.start();
}
public static void main(String[] args) {
ClientMain main = new ClientMain();
main.setIpAddress("10.6.3.92");
main.setSrcPath("E:/temp/movies/");
main.setDstPath("D:/tcp/movies");
main.createConnection();
}
}
(DirectoryTxr.java)
import java.io.*;
import java.net.Socket;
import java.net.SocketException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
public class DirectoryTxr {
Socket clientSocket = null;
String srcDir = null;
String dstDir = null;
byte[] readBuffer = new byte[1024];
private InputStream inStream = null;
private OutputStream outStream = null;
int state = 0;
final int permissionReqState = 1;
final int initialState = 0;
final int dirHeaderSendState = 2;
final int fileHeaderSendState = 3;
final int fileSendState = 4;
final int fileFinishedState = 5;
private boolean isLive = false;
private int numFiles = 0;
private int filePointer = 0;
String request = "May I send?";
String respServer = "Yes,You can";
String dirResponse = "Directory created...Please send files";
String fileHeaderRecvd = "File header received ...Send File";
String fileReceived = "File Received";
String dirFailedResponse = "Failed";
File[] opFileList = null;
public DirectoryTxr(Socket clientSocket, String srcDir, String dstDir) {
try {
this.clientSocket = clientSocket;
inStream = clientSocket.getInputStream();
outStream = clientSocket.getOutputStream();
isLive = true;
this.srcDir = srcDir;
this.dstDir = dstDir;
state = initialState;
readResponse(); //starting read thread
sendMessage(request);
state = permissionReqState;
} catch (IOException io) {
io.printStackTrace();
}
}
private void sendMessage(String message) {
try {
sendBytes(request.getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
/**
* Thread to read response from server
*/
private void readResponse() {
Runnable readRunnable = new Runnable() {
public void run() {
while (isLive) {
try {
int num = inStream.read(readBuffer);
if (num > 0) {
byte[] tempArray = new byte[num];
System.arraycopy(readBuffer, 0, tempArray, 0, num);
processBytes(tempArray);
}
} catch (SocketException se) {
System.exit(0);
} catch (IOException io) {
io.printStackTrace();
isLive = false;
}
}
}
};
Thread readThread = new Thread(readRunnable);
readThread.start();
}
private void sendDirectoryHeader() {
File file = new File(srcDir);
if (file.isDirectory()) {
try {
String[] childFiles = file.list();
numFiles = childFiles.length;
String dirHeader = "$" + dstDir + "#" + numFiles + "&";
sendBytes(dirHeader.getBytes("UTF-8"));
} catch (UnsupportedEncodingException en) {
en.printStackTrace();
}
} else {
System.out.println(srcDir + " is not a valid directory");
}
}
private void sendFile(String dirName) {
File file = new File(dirName);
if (!file.isDirectory()) {
try {
int len = (int) file.length();
int buffSize = len / 8;
//to avoid the heap limitation
RandomAccessFile raf = new RandomAccessFile(file, "rw");
FileChannel channel = raf.getChannel();
int numRead = 0;
while (numRead >= 0) {
ByteBuffer buf = ByteBuffer.allocate(1024 * 100000);
numRead = channel.read(buf);
if (numRead > 0) {
byte[] array = new byte[numRead];
System.arraycopy(buf.array(), 0, array, 0, numRead);
sendBytes(array);
}
}
System.out.println("Finished");
} catch (IOException io) {
io.printStackTrace();
}
}
}
private void sendHeader(String fileName) {
try {
File file = new File(fileName);
if (file.isDirectory())
return;//avoiding child directories to avoid confusion
//if want we can sent them recursively
//with proper state transitions
String header = "&" + fileName + "#" + file.length() + "*";
sendHeader(header);
sendBytes(header.getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
private void sendBytes(byte[] dataBytes) {
synchronized (clientSocket) {
if (outStream != null) {
try {
outStream.write(dataBytes);
outStream.flush();
} catch (IOException io) {
io.printStackTrace();
}
}
}
}
private void processBytes(byte[] data) {
try {
String parsedMessage = new String(data, "UTF-8");
System.out.println(parsedMessage);
setResponse(parsedMessage);
} catch (UnsupportedEncodingException u) {
u.printStackTrace();
}
}
private void setResponse(String message) {
if (message.trim().equalsIgnoreCase(respServer) && state == permissionReqState) {
state = dirHeaderSendState;
sendDirectoryHeader();
} else if (message.trim().equalsIgnoreCase(dirResponse) && state == dirHeaderSendState) {
state = fileHeaderSendState;
if (LocateDirectory()) {
createAndSendHeader();
} else {
System.out.println("Vacant or invalid directory");
}
} else if (message.trim().equalsIgnoreCase(fileHeaderRecvd) && state == fileHeaderSendState) {
state = fileSendState;
sendFile(opFileList[filePointer].toString());
state = fileFinishedState;
filePointer++;
} else if (message.trim().equalsIgnoreCase(fileReceived) && state == fileFinishedState) {
if (filePointer < numFiles) {
createAndSendHeader();
}
System.out.println("Successfully sent");
} else if (message.trim().equalsIgnoreCase(dirFailedResponse)) {
System.out.println("Going to exit....Error ");
// System.exit(0);
} else if (message.trim().equalsIgnoreCase("Thanks")) {
System.out.println("All files were copied");
}
}
private void closeSocket() {
try {
clientSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
private boolean LocateDirectory() {
boolean status = false;
File file = new File(srcDir);
if (file.isDirectory()) {
opFileList = file.listFiles();
numFiles = opFileList.length;
if (numFiles <= 0) {
System.out.println("No files found");
} else {
status = true;
}
}
return status;
}
private void createAndSendHeader() {
File opFile = opFileList[filePointer];
String header = "&" + opFile.getName() + "#" + opFile.length() + "*";
try {
state = fileHeaderSendState;
sendBytes(header.getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
}
}
private void sendListFiles() {
createAndSendHeader();
}
}
(ServerMain.java)
public class ServerMain {
public ServerMain() {
}
public static void main(String[] args) {
DirectoryRcr dirRcr = new DirectoryRcr();
}
}
(DirectoryRcr.java)
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
public class DirectoryRcr {
String request = "May I send?";
String respServer = "Yes,You can";
String dirResponse = "Directory created...Please send files";
String dirFailedResponse = "Failed";
String fileHeaderRecvd = "File header received ...Send File";
String fileReceived = "File Received";
Socket socket = null;
OutputStream ioStream = null;
InputStream inStream = null;
boolean isLive = false;
int state = 0;
final int initialState = 0;
final int dirHeaderWait = 1;
final int dirWaitState = 2;
final int fileHeaderWaitState = 3;
final int fileContentWaitState = 4;
final int fileReceiveState = 5;
final int fileReceivedState = 6;
final int finalState = 7;
byte[] readBuffer = new byte[1024 * 100000];
long fileSize = 0;
String dir = "";
FileOutputStream foStream = null;
int fileCount = 0;
File dstFile = null;
public DirectoryRcr() {
acceptConnection();
}
private void acceptConnection() {
try {
ServerSocket server = new ServerSocket(3339);
socket = server.accept();
isLive = true;
ioStream = socket.getOutputStream();
inStream = socket.getInputStream();
state = initialState;
startReadThread();
} catch (IOException io) {
io.printStackTrace();
}
}
private void startReadThread() {
Thread readRunnable = new Thread() {
public void run() {
while (isLive) {
try {
int num = inStream.read(readBuffer);
if (num > 0) {
byte[] tempArray = new byte[num];
System.arraycopy(readBuffer, 0, tempArray, 0, num);
processBytes(tempArray);
}
sleep(100);
} catch (SocketException s) {
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException i) {
i.printStackTrace();
}
}
}
};
Thread readThread = new Thread(readRunnable);
readThread.start();
}
private void processBytes(byte[] buff) throws InterruptedException {
if (state == fileReceiveState || state == fileContentWaitState) {
//write to file
if (state == fileContentWaitState)
state = fileReceiveState;
fileSize = fileSize - buff.length;
writeToFile(buff);
if (fileSize == 0) {
state = fileReceivedState;
try {
foStream.close();
} catch (IOException io) {
io.printStackTrace();
}
System.out.println("Received " + dstFile.getName());
sendResponse(fileReceived);
fileCount--;
if (fileCount != 0) {
state = fileHeaderWaitState;
} else {
System.out.println("Finished");
state = finalState;
sendResponse("Thanks");
Thread.sleep(2000);
System.exit(0);
}
System.out.println("Received");
}
} else {
parseToUTF(buff);
}
}
private void parseToUTF(byte[] data) {
try {
String parsedMessage = new String(data, "UTF-8");
System.out.println(parsedMessage);
setResponse(parsedMessage);
} catch (UnsupportedEncodingException u) {
u.printStackTrace();
}
}
private void setResponse(String message) {
if (message.trim().equalsIgnoreCase(request) && state == initialState) {
sendResponse(respServer);
state = dirHeaderWait;
} else if (state == dirHeaderWait) {
if (createDirectory(message)) {
sendResponse(dirResponse);
state = fileHeaderWaitState;
} else {
sendResponse(dirFailedResponse);
System.out.println("Error occurred...Going to exit");
System.exit(0);
}
} else if (state == fileHeaderWaitState) {
createFile(message);
state = fileContentWaitState;
sendResponse(fileHeaderRecvd);
} else if (message.trim().equalsIgnoreCase(dirFailedResponse)) {
System.out.println("Error occurred ....");
System.exit(0);
}
}
private void sendResponse(String resp) {
try {
sendBytes(resp.getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
private boolean createDirectory(String dirName) {
boolean status = false;
dir = dirName.substring(dirName.indexOf("$") + 1, dirName.indexOf("#"));
fileCount = Integer.parseInt(dirName.substring(dirName.indexOf("#") + 1, dirName.indexOf("&")));
if (new File(dir).mkdir()) {
status = true;
System.out.println("Successfully created directory " + dirName);
} else if (new File(dir).mkdirs()) {
status = true;
System.out.println("Directories were created " + dirName);
} else if (new File(dir).exists()) {
status = true;
System.out.println("Directory exists" + dirName);
} else {
System.out.println("Could not create directory " + dirName);
status = false;
}
return status;
}
private void createFile(String fileName) {
String file = fileName.substring(fileName.indexOf("&") + 1, fileName.indexOf("#"));
String lengthFile = fileName.substring(fileName.indexOf("#") + 1, fileName.indexOf("*"));
fileSize = Integer.parseInt(lengthFile);
dstFile = new File(dir + "/" + file);
try {
foStream = new FileOutputStream(dstFile);
System.out.println("Starting to receive " + dstFile.getName());
} catch (FileNotFoundException fn) {
fn.printStackTrace();
}
}
private void writeToFile(byte[] buff) {
try {
foStream.write(buff);
} catch (IOException io) {
io.printStackTrace();
}
}
private void sendBytes(byte[] dataBytes) {
synchronized (socket) {
if (ioStream != null) {
try {
ioStream.write(dataBytes);
} catch (IOException io) {
io.printStackTrace();
}
}
}
}
}
ClientMain.java and DirectoryTxr.java are the two classes under client application. ServerMain.java and DirectoryRcr.java are the two classes under Server application.
run the ClientMain.java and ServerMain.java
You can sort an array using Arrays.sort(...)
ie
String[] childFiles = file.list();
Arrays.sort(childFiles);
As I understand it, this will sort the files in natural order, based on the file name.
You can modify this by passing a custom Comparator...
Arrays.sort(childFiles, new Comparator<File>() {...}); // Fill out with your requirements...
Progress monitoring will come down to your requirements. Do you want to see only the overall progress of the number of files, the individual files, a combination of both?
What I've done in the past is pre-iterated the file list, calculated the total number of bytes to be copied and used a ProgressMonitor to display the overall bytes been copied...
Otherwise you will need to supply your own dialog. In either case, you will need use SwingUtilities.invokeLater to update them correctly.
Check out Concurrency in Swing for more details.
Network connectivity is subjective. You could simply send a special "message" to there server and wait for a response, but this only suggests that the message was sent and a recipt was received. It could just as easily fail when you start transfering the file again...
At the moment I have a Java UDP server working on Android, the server has a datagramSocket on port which it first just listens for a client to connect, a client will create a new datagramSocket on the same port, and send a packet over asking to connect, once the server receives this, it takes the IP uses to send the message, and then just sends a message pack with a position of a block, while the client also sends back it's own position of a block,
Information, the application allows multiple users to connect to one host, this host will take in all the positions from the clients and then broadcast them out, there are other ways to do it, but I want to do it this way for research.
But anyways down to the question, My application will hopefully handle 8 users, as this application works for wifihotspot. how would i go about allowing multiple clients to connect, send data and receive data? I have the code already to allow one client to connect, and the host will send out data to that client, but if I try to connect another client i get an error, Here is my code for the server and the client
P.S. there maybe some debugging code in there as I need to clear that out.
Server code
package com.example.gelorph_v1;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.MulticastSocket;
import java.net.NetworkInterface;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Enumeration;
import org.apache.http.conn.util.InetAddressUtils;
import android.content.Context;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.util.Log;
public class gameServer extends Thread {
/**
* Sets up a server for Android applciation
*/
private static final String TAG = "GameServer";
private DatagramSocket socket;
private int port = 50000;
private int players = 0;
private ArrayList<gameObject> assets = new ArrayList();
private ArrayList<InetAddress> address = new ArrayList();
private boolean wait = false;
private Context contextHolder = null;
//Make an array, this array will hold all the positions
//the clients sent to it,
//using the ID number, it will store it in a array block
//and the "host" can just return it and use that
public gameServer( Context context ) throws IOException
{
contextHolder = context;
socket = new DatagramSocket( port );
Log.d(TAG, "Server was setup");
}
public DatagramSocket rtnSocket(){ return socket; }
private String getLocalIPAddress()
{
try
{
for (Enumeration<NetworkInterface> nis = NetworkInterface.getNetworkInterfaces(); nis.hasMoreElements();)
{
NetworkInterface ni = nis.nextElement();
Log.v(TAG, "NetworkInterface = " + ni.getDisplayName());
for (Enumeration<InetAddress> ips = ni.getInetAddresses(); ips.hasMoreElements();)
{
InetAddress ip = ips.nextElement();
String s = ip.getHostAddress();
Log.v(TAG, "InetAddress = " + s);
if (!ip.isLoopbackAddress())
{
if(InetAddressUtils.isIPv4Address(s)) return s;
}
}
}
}
catch (SocketException e)
{
Log.e(TAG,"getLocalIPAddress()", e);
}
return null;
}
public void passClient( gameObject clientTemp )
{
assets.add( clientTemp );
}
protected void doInBackground()
{
}
#Override
public void run() {
InetAddress client = null;
boolean run = true;
String data = "";
DatagramPacket packet = null;
while( run )
{
if( data.equalsIgnoreCase( "" ) )
{
/*Log.d(TAG, "waiting for clients");
String msg = "waiting";
int msgLength = msg.length();
byte[] message = msg.getBytes();
DatagramPacket p = new DatagramPacket( message, msgLength, client, port );
try
{
socket.send( p );
}
catch (IOException e2)
{
Log.d(TAG, "Error with sending");
e2.printStackTrace();
}*/
}
//Send some data
if( data.equalsIgnoreCase( "connect" ) && wait == true )
{
Log.d(TAG, "ID send :" + packet.getAddress());
address.add( packet.getAddress() );
players += 1;
String msg = String.valueOf( players );
int msgLength = msg.length();
byte[] message = msg.getBytes();
DatagramPacket p = new DatagramPacket( message, msgLength, packet.getAddress(), port );
try
{
socket.send( p );
wait = false;
}
catch (IOException e2)
{
Log.d(TAG, "Error with sending");
e2.printStackTrace();
data = "";
}
}
//if( /*data.equalsIgnoreCase( "position" )*/ address.size() > 0 )
//{
//Create for loop to create the string
String msg = "";
msg = players + "#";
for(int i = 0; i < players; i++)
{
msg += + i + ":" + assets.get(i).returnPosX() + ":" + assets.get(i).returnPosY() + ":";
}
//msg = String.valueOf(
// players + ":" +
// "1:" + assets.get(0).returnPosX() + ":" + assets.get(0).returnPosY() );
int msgLength = msg.length();
byte[] message = msg.getBytes();
for(int i = 0; i < address.size() ; i++)
{
DatagramPacket p = new DatagramPacket( message, msgLength, address.get(i), port );
try
{
socket.send( p );
}
catch (IOException e2)
{
Log.d(TAG, "Error with sending");
e2.printStackTrace();
}
}
//Log.d(TAG, "Data sent is:" + msg);
//}
data = " ";
//Receive some data
if( wait == false )
{
byte[] buf = new byte[256];
packet = new DatagramPacket( buf, buf.length );
try
{
socket.receive( packet );
wait = true;
}
catch (IOException e)
{
Log.d(TAG, "Error with receiving data");
e.printStackTrace();
}
data = new String( buf, 0, packet.getLength() );
Log.d(TAG, "Data received from :" + packet.getAddress() + ", holds this value: " + data);
//Upset each asset with the data sent
}
//Log.d(TAG, "Data received was :" + data);
try
{
this.sleep( 25 );
}
catch (InterruptedException e)
{
// TODO Auto-generated catch block
Log.d(TAG, "Error with trying to sleep");
e.printStackTrace();
}
}
Log.d(TAG, "Error with while run value");
}
public int returnPlayers(){ return players; }
}
Client code
package com.example.gelorph_v1;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.MulticastSocket;
import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.ArrayList;
import android.content.Context;
import android.graphics.BitmapFactory;
import android.net.DhcpInfo;
import android.net.wifi.WifiManager;
import android.os.AsyncTask;
import android.util.Log;
public class gameClient extends Thread {
private static final String TAG = "gameClient";
private gameServer server;
private boolean rdyForPlay = false;
private gameObject[] assets = new gameObject[8];
private int ID = 0;
private int port = 50000;
private InetAddress address;
private maths cal = new maths();
private Context contextHolder;
private boolean host = false;
private DatagramSocket socket = null;
private int totalPlayers = 0;
public gameClient( boolean serverTag, Context context )
{
if( serverTag == true)
{
host = true;
try
{
contextHolder = context;
server = new gameServer( contextHolder );
this.start();
}
catch (IOException e)
{
Log.d(TAG, "Could not start server");
e.printStackTrace();
}
}
else
{
contextHolder = context;
connectToServer();
this.start();
}
}
public void connectToServer()
{
//Send a connect message to the server
try {
socket = new DatagramSocket( port );
byte[] bufer = new byte[256];
String msg = "connect";
int msgLength = msg.length();
bufer = msg.getBytes();
InetAddress address;
address = InetAddress.getByName("192.168.1.59");
DatagramPacket p = new DatagramPacket( bufer, bufer.length , address, port );
socket.send( p );
} catch (UnknownHostException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
} catch (SocketException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//Receive the message back
byte[] buf = new byte[256];
DatagramPacket packet = new DatagramPacket( buf, buf.length );
try
{
socket.receive( packet );
}
catch (IOException e)
{
Log.d(TAG, "Error with receiving data");
e.printStackTrace();
}
String data = new String( buf, 0, packet.getLength() );
ID = Integer.parseInt( data );
setUpClient();
Log.d(TAG, "Data received was :" + ID);
}
public void setUpClient()
{
gameObject temp = new gameObject(BitmapFactory.decodeResource(contextHolder.getResources(), R.drawable.player), 250, 300);
assets[ID] = temp;
if( host == true )
{
server.passClient( temp );
}
}
public void sendTouchEvent(float xSet, float ySet)
{
assets[ID].setPosition( xSet, ySet );
}
#Override
public void run()
{
if( host == true ) { setUpClient(); server.start(); }
rdyForPlay = true;
boolean run = true;
boolean setupPlayer = false;
while( run )
{
//Tell the server to give position of players
//if( setupPlayer == true )
//{
// setUpClient();
// setupPlayer = false;
//}
if( host == false )
{
try {
if(socket == null)
{
socket = new DatagramSocket( port );
}
byte[] bufer = new byte[256];
//String msg = "position";
String msg = ID +":"+ assets[ID].returnPosX() +":"+ assets[ID].returnPosY();
int msgLength = msg.length();
bufer = msg.getBytes();
InetAddress address;
address = InetAddress.getByName("192.168.1.59");
DatagramPacket p = new DatagramPacket( bufer, bufer.length , address, port );
socket.send( p );
} catch (UnknownHostException e2) {
// TODO Auto-generated catch block
Log.d(TAG, "Error with unknown host");
e2.printStackTrace();
} catch (SocketException e) {
// TODO Auto-generated catch block
Log.d(TAG, "Error with socket");
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
Log.d(TAG, "Error with sending/receiving data");
e.printStackTrace();
}
byte[] buf = new byte[256];
DatagramPacket packet = new DatagramPacket( buf, buf.length );
try
{
socket.receive( packet );
}
catch (IOException e)
{
Log.d(TAG, "Error with receiving data");
e.printStackTrace();
}
String data = new String( buf, 0, packet.getLength() );
//Split the string up
String[] dataArray = data.split("#");
int newTotalPlayers = Integer.parseInt( dataArray[0] );
if( newTotalPlayers != totalPlayers )
{
Log.d(TAG," what is total amount of players:" + newTotalPlayers);
if( newTotalPlayers == 1 )
{
newPlayer( 0 );
totalPlayers = newTotalPlayers;
}
else
{
newPlayer( newTotalPlayers );
totalPlayers = newTotalPlayers;
}
//if( ID == 0 && host == false)
//{
// ID = newTotalPlayers;
// setupPlayer = true;
//}
}
//Do a for loop to go through dataArray
for( int i = 0; i < totalPlayers; i++)
{
String[] pos = dataArray[(i + 1)].split(":");
if( Integer.parseInt( pos[(i*3)] ) == ID )
{
Log.d(TAG, "Do nothing please");
}
else
{
assets[i].setPosition( Integer.parseInt( pos[(i*3) + 1] ), Integer.parseInt( pos[(i*3) + 2] ) );
}
}
}
//host
if( host == true )
{
/*if( server.returnPlayers() != totalPlayers )
{
Log.d(TAG," what is total amount of players:" + server.returnPlayers());
newPlayer( server.returnPlayers() );
totalPlayers = server.returnPlayers();
//if( ID == 0 && host == false)
//{
// ID = newTotalPlayers;
// setupPlayer = true;
//}
}*/
}
}
Log.d(TAG, "Error with run value");
}
private void newPlayer( int idOfNewPlayer )
{
gameObject temp = new gameObject(BitmapFactory.decodeResource(contextHolder.getResources(), R.drawable.new_player), 250, 300);
assets[ idOfNewPlayer ] = temp;
}
private void updateAssets()
{
}
public gameObject[] rtnAssets(){ return assets; }
public int rtnID(){ return ID; }
public boolean rtnRdy(){ return rdyForPlay; }
public gameServer rtnServer(){ return server; }
public boolean rtnHost(){ return host; }
public void stopServers()
{
socket.close();
server.rtnSocket().close();
}
}
Don't worry to much about a new block being created when a client joins and what not, I'm just trying to work out what is the best way to allow multiple users? and most importantly how? If anyone could point me in the right direction, or give some simple example code that would be great.