problem with server and client , working on my machine not working on another
hello guys i have designed a server client which transfers data through sockets. Everything is ok when i run it on my machine it works 100% of the time. When i run the server on another machine and the client on mine, i am unable to get data. when i run the server on my machine and the client on theirs i am unable to put data , but i can get. i dont know what is going on, maybe you can shed some light.
There is more code that makes this work correctly but i omit that out to reduce the complications . Please if you get a chanse look at this and tell me why it works on my system but not on the server? and does anyone know how to debug this? i mean this is run on the server how can i debug a server since i cannot be there (and everything 开发者_如何学运维works correctly on my system?)
Server :
if (get.equals("get")) {
try {
Copy copy = new Copy(socket, dir);//maybe dir is not needed
String name = input.substring(4);
File checkFile = new File(dir.getCurrentPath(), name);
DataOutputStream outToClient = new DataOutputStream(socket.getOutputStream());
if (checkFile.isFile() && checkFile.exists()) {
outToClient.writeBytes("continue" + "\n");
BufferedReader inFromServer = new BufferedReader(new InputStreamReader(
socket.getInputStream()));
boolean cont = false;
String x;
while (!cont) {
if ((x = inFromServer.readLine()).equals("continue")) {
cont = true;
}
}
copy.copyFile(name);
output = "File copied to client successfully" + "\n";
} else {
outToClient.writeBytes("File failed to be copied to client" + "\n");
output = "";
}
} catch (Exception e) {
output = "Failed to Copy File to client" + "\n";
}
} else if (get.equals("put")) {
//so the client sends: the put request
//then sends the length
try {
DataInputStream inFromClient = new DataInputStream(socket.getInputStream());
DataOutputStream outToClient = new DataOutputStream(socket.getOutputStream());
outToClient.writeBytes("continue" + "\n");
long lengthLong = (inFromClient.readLong());
int length = (int) lengthLong;
byte[] recieveFile = new byte[length];//FIX THE LENGTH
// InputStream is = socket.getInputStream();
FileOutputStream fos = new FileOutputStream("Copy " + input.substring(4));
BufferedOutputStream bos = new BufferedOutputStream(fos);
int bytesRead;
int current = 0;
bytesRead = inFromClient.read(recieveFile, 0, recieveFile.length);
current = bytesRead;
do {
bytesRead = inFromClient.read(recieveFile, current, (recieveFile.length - current));
if (bytesRead >= 0)
current += bytesRead;
} while (bytesRead > 0); // FIX THE LENGTH
bos.write(recieveFile, 0, current);
bos.flush();
bos.close();
output = "File copied to Server successfully" + " \n";
The copy class:
File checkFile = new File(dir.getCurrentPath(), file);
if (checkFile.isFile() && checkFile.exists()) {
DataOutputStream outToClient = new DataOutputStream(socket.getOutputStream());
// byte[] receivedData = new byte[8192];
File inputFile = new File(dir.getCurrentPath(), file);
byte[] receivedData = new byte[(int) inputFile.length()];
long length = inputFile.length();
outToClient.writeLong(length);
//maybe wait here for get request?
DataInputStream dis = new DataInputStream(new FileInputStream(getCopyPath(file)));
dis.read(receivedData, 0, receivedData.length);
OutputStream os = socket.getOutputStream();
outToClient.write(receivedData, 0, receivedData.length);//outputStreasm replaced by Datatoutputstream
outToClient.flush();
The client class:
else if (sentence.length() > 3 && sentence.substring(0, 3).equals("get")) {
outToServer.writeBytes(sentence + "\n");
String response = inFromServer.readLine();
if (response.equals("File failed to be copied to client")) {
System.out.println(response);
} else {
DataInputStream inFromClient = new DataInputStream(clientSocket.getInputStream());
DataOutputStream outToClient = new DataOutputStream(clientSocket.getOutputStream());
outToClient.writeBytes("continue" + "\n");
long lengthLong = (inFromClient.readLong());
int length = (int) lengthLong;
byte[] recieveFile = new byte[length];
FileOutputStream fos = new FileOutputStream("Copy " + sentence.substring(4));
BufferedOutputStream bos = new BufferedOutputStream(fos);
int bytesRead;
int current = 0;
bytesRead = inFromClient.read(recieveFile, 0, recieveFile.length);
current = bytesRead;
do {
bytesRead = inFromClient.read(recieveFile, current, (recieveFile.length - current));
if (bytesRead >= 0)
current += bytesRead;
} while (bytesRead > 0);
bos.write(recieveFile, 0, current);
bos.flush();
bos.close();
}
} else if (sentence.length() > 3 && sentence.substring(0, 3).equals("put")) {
File checkFile = new File(dir.getCurrentPath(), sentence.substring(4));
if (checkFile.isFile() && checkFile.exists()) {
try {
outToServer.writeBytes(sentence + "\n");
boolean cont = false;
String x;
while (!cont) {
if ((x = inFromServer.readLine()).equals("continue")) {
cont = true;
}
}
String name = sentence.substring(4);
copy.copyFile(name);
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