/**
* Executes the specified command.
*
* @param cmd command to be executed
* @throws IOException I/O exception
*/
private void execute(final Command cmd) throws IOException {
log.write(this, cmd + " [...]");
final DecodingInput di = new DecodingInput(in);
try {
cmd.setInput(di);
cmd.execute(context);
success(cmd.info());
} catch (final BaseXException ex) {
di.flush();
error(ex.getMessage());
}
}
/**
* Runs the specified command.
*
* @param c command
* @param os output stream
* @throws HTTPException HTTP exception
*/
final void run(final Command c, final OutputStream os) throws HTTPException {
final boolean ok = c.run(context, os);
error(c.info());
if (!ok) throw HTTPCode.BAD_REQUEST_X.get(c.info());
}
@Override
public void run() {
// initialize the session via cram-md5 authentication
try {
final String ts = Long.toString(System.nanoTime());
final byte[] address = socket.getInetAddress().getAddress();
// send {TIMESTAMP}0
out = PrintOutput.get(socket.getOutputStream());
out.print(ts);
send(true);
// evaluate login data
in = new BufferInput(socket.getInputStream());
// receive {USER}0{PASSWORD}0
final String us = in.readString();
final String pw = in.readString();
context.user = context.users.get(us);
running = context.user != null && md5(string(context.user.password) + ts).equals(pw);
// write log information
if (running) {
log.write(this, "LOGIN " + context.user.name, OK);
// send {OK}
send(true);
server.unblock(address);
context.add(this);
} else {
if (!us.isEmpty()) log.write(this, ACCESS_DENIED + COLS + us);
new ClientDelayer(server.block(address), this, server).start();
}
} catch (final IOException ex) {
Util.stack(ex);
log.write(ex.getMessage());
return;
}
if (!running) return;
// authentification done, start command loop
ServerCmd sc = null;
String cmd = null;
try {
while (running) {
command = null;
try {
final int b = in.read();
if (b == -1) {
// end of stream: exit session
quit();
break;
}
last = System.currentTimeMillis();
perf.time();
sc = ServerCmd.get(b);
cmd = null;
if (sc == ServerCmd.CREATE) {
create();
} else if (sc == ServerCmd.ADD) {
add();
} else if (sc == ServerCmd.WATCH) {
watch();
} else if (sc == ServerCmd.UNWATCH) {
unwatch();
} else if (sc == ServerCmd.REPLACE) {
replace();
} else if (sc == ServerCmd.STORE) {
store();
} else if (sc != ServerCmd.COMMAND) {
query(sc);
} else {
// database command
cmd = new ByteList().add(b).add(in.readBytes()).toString();
}
} catch (final IOException ex) {
// this exception may be thrown if a session is stopped
quit();
break;
}
if (sc != ServerCmd.COMMAND) continue;
// parse input and create command instance
try {
command = new CommandParser(cmd, context).parseSingle();
} catch (final QueryException ex) {
// log invalid command
final String msg = ex.getMessage();
log.write(this, cmd, ERROR_C + msg);
// send 0 to mark end of potential result
out.write(0);
// send {INFO}0
out.writeString(msg);
// send 1 to mark error
send(false);
continue;
}
// start timeout
command.startTimeout(context.mprop.num(MainProp.TIMEOUT));
log.write(this, command.toString().replace('\r', ' ').replace('\n', ' '));
// execute command and send {RESULT}
boolean ok = true;
String info;
try {
command.execute(context, new EncodingOutput(out));
info = command.info();
} catch (final BaseXException ex) {
ok = false;
info = ex.getMessage();
if (info.startsWith(INTERRUPTED)) info = TIMEOUT_EXCEEDED;
}
// stop timeout
command.stopTimeout();
// send 0 to mark end of result
out.write(0);
// send info
info(info, ok);
// stop console
if (command instanceof Exit) {
command = null;
quit();
}
}
} catch (final IOException ex) {
log.write(this, sc == ServerCmd.COMMAND ? cmd : sc, ERROR_C + ex.getMessage());
Util.debug(ex);
command = null;
quit();
}
command = null;
}