/**
* Constructor, specifying the server host:port combination, login data and an output stream.
*
* @param host server name
* @param port server port
* @param user user name
* @param pass password
* @param output client output; if set to {@code null}, results will be returned as strings.
* @throws IOException I/O exception
*/
public ClientSession(
final String host,
final int port,
final String user,
final String pass,
final OutputStream output)
throws IOException {
super(output);
ehost = host;
socket = new Socket();
try {
// limit timeout to five seconds
socket.connect(new InetSocketAddress(host, port), 5000);
} catch (final IllegalArgumentException ex) {
throw new BaseXException(ex);
}
sin = socket.getInputStream();
// receive timestamp
final BufferInput bi = new BufferInput(sin);
final String ts = bi.readString();
// send user name and hashed password/timestamp
sout = PrintOutput.get(socket.getOutputStream());
send(user);
send(Token.md5(Token.md5(pass) + ts));
sout.flush();
// receive success flag
if (!ok(bi)) throw new LoginException();
}
/**
* Gets the next token from a tokenizer and converts it to a string.
*
* @return The next token in the stream, as a string.
* @throws TextParseException The input was invalid or not a string.
* @throws IOException An I/O error occurred.
*/
public String getString() throws IOException {
Token next = get();
if (!next.isString()) {
throw exception("expected a string");
}
return next.value;
}
/**
* Test concurrent reader and writer (GH-458).
*
* <p><b>Test case:</b>
*
* <ol>
* <li/>start a long running reader;
* <li/>try to start a writer: it should time out;
* <li/>stop the reader;
* <li/>start the writer again: it should succeed.
* </ol>
*
* @throws Exception error during request execution
*/
@Test
@Ignore("There is no way to stop a query on the server!")
public void testReaderWriter() throws Exception {
final String readerQuery = "?query=(1%20to%20100000000000000)%5b.=1%5d";
final String writerQuery = "/test.xml";
final byte[] content = Token.token("<a/>");
final Get readerAction = new Get(readerQuery);
final Put writerAction = new Put(writerQuery, content);
final ExecutorService exec = Executors.newFixedThreadPool(2);
// start reader
exec.submit(readerAction);
Performance.sleep(TIMEOUT); // delay in order to be sure that the reader has started
// start writer
Future<HTTPResponse> writer = exec.submit(writerAction);
try {
final HTTPResponse result = writer.get(TIMEOUT, TimeUnit.MILLISECONDS);
if (result.status.isSuccess()) fail("Database modified while a reader is running");
throw new Exception(result.toString());
} catch (final TimeoutException e) {
// writer is blocked by the reader: stop it
writerAction.stop = true;
}
// stop reader
readerAction.stop = true;
// start the writer again
writer = exec.submit(writerAction);
assertEquals(HTTPCode.CREATED, writer.get().status);
}
/**
* Test concurrent writers (GH-458).
*
* <p><b>Test case:</b>
*
* <ol>
* <li/>start several writers one after another;
* <li/>all writers should succeed.
* </ol>
*
* @throws Exception error during request execution
*/
@Test
public void testMultipleWriters() throws Exception {
final int count = 10;
final String template =
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
+ "<command xmlns=\"http://basex.org/rest\"><text><![CDATA["
+ "ADD TO %1$d <node id=\"%1$d\"/>"
+ "]]></text></command>";
@SuppressWarnings("unchecked")
final Future<HTTPResponse>[] tasks = new Future[count];
final ExecutorService exec = Executors.newFixedThreadPool(count);
// start all writers (not at the same time, but still in parallel)
for (int i = 0; i < count; i++) {
final String command = String.format(template, i);
tasks[i] = exec.submit(new Post("", Token.token(command)));
}
// check if all have finished successfully
for (final Future<HTTPResponse> task : tasks) {
assertEquals(HTTPCode.OK, task.get(TIMEOUT, TimeUnit.MILLISECONDS).status);
}
}
/**
* Sends a string to the server.
*
* @param s string to be sent
* @throws IOException I/O exception
*/
protected void send(final String s) throws IOException {
sout.write(Token.token(s));
sout.write(0);
}
/**
* Checks if the specified string is "no", "false" or "off".
*
* @param string string to be checked
* @return result of check
*/
public static boolean no(final String string) {
return Token.eqic(string, NO, FALSE, OFF, INFOOFF);
}
/**
* Checks if the specified string is "yes", "true" or "on".
*
* @param string string to be checked
* @return result of check
*/
public static boolean yes(final String string) {
return Token.eqic(string, YES, TRUE, ON, INFOON);
}
/**
* Returns a string and replaces all % characters by the specified extensions (see {@link
* TokenBuilder#addExt} for details).
*
* @param str string to be extended
* @param ext text text extensions
* @return extended string
*/
public static String info(final Object str, final Object... ext) {
return Token.string(inf(str, ext));
}
/**
* Prints a string to standard output, followed by a newline.
*
* @param str output string
* @param ext text optional extensions
*/
public static void outln(final Object str, final Object... ext) {
out((str instanceof byte[] ? Token.string((byte[]) str) : str) + NL, ext);
}
/**
* Gets the next token from a tokenizer.
*
* @param wantWhitespace If true, leading whitespace will be returned as a token.
* @param wantComment If true, comments are returned as tokens.
* @return The next token in the stream.
* @throws TextParseException The input was invalid.
* @throws IOException An I/O error occurred.
*/
public Token get(boolean wantWhitespace, boolean wantComment) throws IOException {
int type;
int c;
if (ungottenToken) {
ungottenToken = false;
if (current.type == WHITESPACE) {
if (wantWhitespace) return current;
} else if (current.type == COMMENT) {
if (wantComment) return current;
} else {
if (current.type == EOL) line++;
return current;
}
}
int skipped = skipWhitespace();
if (skipped > 0 && wantWhitespace) return current.set(WHITESPACE, null);
type = IDENTIFIER;
sb.setLength(0);
while (true) {
c = getChar();
if (c == -1 || delimiters.indexOf(c) != -1) {
if (c == -1) {
if (quoting) throw exception("EOF in " + "quoted string");
else if (sb.length() == 0) return current.set(EOF, null);
else return current.set(type, sb);
}
if (sb.length() == 0 && type != QUOTED_STRING) {
if (c == '(') {
multiline++;
skipWhitespace();
continue;
} else if (c == ')') {
if (multiline <= 0) throw exception("invalid " + "close " + "parenthesis");
multiline--;
skipWhitespace();
continue;
} else if (c == '"') {
if (!quoting) {
quoting = true;
delimiters = quotes;
type = QUOTED_STRING;
} else {
quoting = false;
delimiters = delim;
skipWhitespace();
}
continue;
} else if (c == '\n') {
return current.set(EOL, null);
} else if (c == ';') {
while (true) {
c = getChar();
if (c == '\n' || c == -1) break;
sb.append((char) c);
}
if (wantComment) {
ungetChar(c);
return current.set(COMMENT, sb);
} else if (c == -1 && type != QUOTED_STRING) {
checkUnbalancedParens();
return current.set(EOF, null);
} else if (multiline > 0) {
skipWhitespace();
sb.setLength(0);
continue;
} else return current.set(EOL, null);
} else throw new IllegalStateException();
} else ungetChar(c);
break;
} else if (c == '\\') {
c = getChar();
if (c == -1) throw exception("unterminated escape sequence");
sb.append('\\');
} else if (quoting && c == '\n') {
throw exception("newline in quoted string");
}
sb.append((char) c);
}
if (sb.length() == 0 && type != QUOTED_STRING) {
checkUnbalancedParens();
return current.set(EOF, null);
}
return current.set(type, sb);
}
