/**
* Constructor.
*
* @param rq request
* @param rs response
* @throws IOException I/O exception
*/
public HTTPContext(final HttpServletRequest rq, final HttpServletResponse rs) throws IOException {
req = rq;
res = rs;
final String m = rq.getMethod();
method = HTTPMethod.get(m);
final StringBuilder uri = new StringBuilder(req.getRequestURL());
final String qs = req.getQueryString();
if (qs != null) uri.append('?').append(qs);
log(false, m, uri);
// set UTF8 as default encoding (can be overwritten)
res.setCharacterEncoding(UTF8);
segments = toSegments(req.getPathInfo());
path = join(0);
user = System.getProperty(DBUSER);
pass = System.getProperty(DBPASS);
// set session-specific credentials
final String auth = req.getHeader(AUTHORIZATION);
if (auth != null) {
final String[] values = auth.split(" ");
if (values[0].equals(BASIC)) {
final String[] cred = Base64.decode(values[1]).split(":", 2);
if (cred.length != 2) throw new LoginException(NOPASSWD);
user = cred[0];
pass = cred[1];
} else {
throw new LoginException(WHICHAUTH, values[0]);
}
}
}
@Override
protected String run(final String... args) throws IOException {
try {
final ArrayOutput ao = new ArrayOutput();
System.setOut(new PrintStream(ao));
System.setErr(NULL);
new BaseX(args);
return ao.toString();
} finally {
System.setOut(OUT);
System.setErr(ERR);
}
}
/**
* Constructor.
*
* @param s socket
* @param c database context
* @param l log reference
* @param srv server reference
*/
public ClientListener(final Socket s, final Context c, final Log l, final BaseXServer srv) {
context = new Context(c, this);
socket = s;
log = l;
server = srv;
last = System.currentTimeMillis();
}
/**
* Writes a log message.
*
* @param str strings to be written
* @param time add performance info
*/
public void log(final boolean time, final Object... str) {
final Object[] obj = new Object[str.length + (time ? 2 : 1)];
obj[0] = remote();
System.arraycopy(str, 0, obj, 1, str.length);
if (time) obj[obj.length - 1] = perf.toString();
context.log.write(obj);
}
/**
* Adds part of a byte array to the token.
*
* @param value the byte array to be added
* @param start start position
* @param end end position
* @return self reference
*/
public TokenBuilder add(final byte[] value, final int start, final int end) {
byte[] chrs = chars;
final int cl = chrs.length, l = end - start, s = size, ns = s + l;
if (ns > cl) chrs = Arrays.copyOf(chrs, Array.newSize(ns));
System.arraycopy(value, start, chrs, s, l);
chars = chrs;
size = ns;
return this;
}
/**
* Inserts the given elements at the specified position.
*
* @param i insert position
* @param e elements to insert
*/
public void insert(final int i, final byte[][] e) {
final int l = e.length;
if (l == 0) return;
if (size + l > list.length) list = Arrays.copyOf(list, newSize(size + l));
Array.move(list, i, l, size - i);
System.arraycopy(e, 0, list, i, l);
size += l;
}
/**
* Sends a notification to the client.
*
* @param name event name
* @param msg event message
* @throws IOException I/O exception
*/
public synchronized void notify(final byte[] name, final byte[] msg) throws IOException {
last = System.currentTimeMillis();
eout.print(name);
eout.write(0);
eout.print(msg);
eout.write(0);
eout.flush();
}
/**
* Sets the output text.
*
* @param out cached output
*/
public void setText(final ArrayOutput out) {
final byte[] buf = out.buffer();
final int size = (int) out.size();
final byte[] chop = token(DOTS);
if (out.finished() && size >= chop.length) {
System.arraycopy(chop, 0, buf, size - chop.length, chop.length);
}
text.setText(buf, size);
header.setText((out.finished() ? CHOPPED : "") + RESULT);
home.setEnabled(gui.context.data() != null);
}
/**
* Initializes the servlet context, based on the servlet context. Parses all context parameters
* and passes them on to the database context.
*
* @param sc servlet context
* @throws IOException I/O exception
*/
static synchronized void init(final ServletContext sc) throws IOException {
// skip process if context has already been initialized
if (context != null) return;
// set servlet path as home directory
final String path = sc.getRealPath("/");
System.setProperty(Prop.PATH, path);
// parse all context parameters
final HashMap<String, String> map = new HashMap<String, String>();
// store default web root
map.put(MainProp.HTTPPATH[0].toString(), path);
final Enumeration<?> en = sc.getInitParameterNames();
while (en.hasMoreElements()) {
final String key = en.nextElement().toString();
if (!key.startsWith(Prop.DBPREFIX)) continue;
// only consider parameters that start with "org.basex."
String val = sc.getInitParameter(key);
if (eq(key, DBUSER, DBPASS, DBMODE, DBVERBOSE)) {
// store servlet-specific parameters as system properties
System.setProperty(key, val);
} else {
// prefix relative paths with absolute servlet path
if (key.endsWith("path") && !new File(val).isAbsolute()) {
val = path + File.separator + val;
}
// store remaining parameters (without project prefix) in map
map.put(key.substring(Prop.DBPREFIX.length()).toUpperCase(Locale.ENGLISH), val);
}
}
context = new Context(map);
if (SERVER.equals(System.getProperty(DBMODE))) {
new BaseXServer(context);
} else {
context.log = new Log(context);
}
}
/**
* Creates an item iterator for the given XML fragment.
*
* @param xml fragment
* @param frag fragment flag
* @return iterator
*/
private ItemCache toIter(final String xml, final boolean frag) {
final ItemCache it = new ItemCache();
try {
String str = frag ? "<X>" + xml + "</X>" : xml;
final Data d = CreateDB.xml(IO.get(str), context);
for (int p = frag ? 2 : 0; p < d.meta.size; p += d.size(p, d.kind(p)))
it.add(new DBNode(d, p));
} catch (final IOException ex) {
return new ItemCache(new Item[] {Str.get(Long.toString(System.nanoTime()))}, 1);
}
return it;
}
/** Test that new records can be continuously added without hitting {@link OutOfMemoryError}. */
@Test
@Ignore("Start this test with a small heap size (e.g. -Xmx64m)")
public void testPerformance() {
final Random random = new Random(System.nanoTime());
while (true) {
final byte[] key = new byte[100];
random.nextBytes(key);
final int size = random.nextInt();
final long pointer = random.nextLong();
cache.add(key, size, pointer);
}
}
/**
* Adds values to the index.
*
* @param key key to be indexed
* @param vals sorted values
*/
void add(final byte[] key, final int... vals) {
// token index: add values. otherwise, reference existing values
final int id = type == IndexType.TOKEN ? values.put(key) : values.id(key), vl = vals.length;
// updatable index: if required, resize existing arrays
while (idsList.size() < id + 1) idsList.add(null);
if (lenList.size() < id + 1) lenList.set(id, 0);
final int len = lenList.get(id), size = len + vl;
int[] ids = idsList.get(id);
if (ids == null) {
ids = vals;
} else {
if (ids.length < size) ids = Arrays.copyOf(ids, Array.newSize(size));
System.arraycopy(vals, 0, ids, len, vl);
if (ids[len - 1] > vals[0]) {
if (reorder == null) reorder = new BoolList(values.size());
reorder.set(id, true);
}
}
idsList.set(id, ids);
lenList.set(id, size);
}
/**
* Constructor, specifying an initial token.
*
* @param token initial token
*/
public TokenBuilder(final byte[] token) {
this(token.length + Array.CAPACITY);
size = token.length;
System.arraycopy(token, 0, chars, 0, size);
}
@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;
}
