/*
* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
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*/
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.net.ServerSocketFactory;
import javax.net.ssl.SSLServerSocket;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.Iterator;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import static java.nio.charset.StandardCharsets.ISO_8859_1;
/**
* A cut-down Http/1 Server for testing various error situations
*
* use interrupt() to halt
*/
public class MockServer extends Thread implements Closeable {
final ServerSocket ss;
private final List<Connection> sockets;
private final List<Connection> removals;
private final List<Connection> additions;
AtomicInteger counter = new AtomicInteger(0);
// if specified (not null), only requests which
// contain this value in their status line
// will be taken into account and returned by activity().
// Other requests will get summarily closed.
// When specified, this can prevent answering to rogue
// (external) clients that might be lurking
// on the test machine instead of answering
// to the test client.
final String root;
// waits up to 2000 seconds for something to happen
// dont use this unless certain activity coming.
public Connection activity() {
for (int i = 0; i < 80 * 100; i++) {
doRemovalsAndAdditions();
for (Connection c : sockets) {
if (c.poll()) {
if (root != null) {
// if a root was specified in MockServer
// constructor, rejects (by closing) all
// requests whose statusLine does not contain
// root.
if (!c.statusLine.contains(root)) {
System.out.println("Bad statusLine: "
+ c.statusLine
+ " closing connection");
c.close();
continue;
}
}
return c;
}
}
try {
Thread.sleep(250);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
return null;
}
private void doRemovalsAndAdditions() {
synchronized (removals) {
Iterator<Connection> i = removals.iterator();
while (i.hasNext()) {
Connection c = i.next();
System.out.println("socket removed: " + c);
sockets.remove(c);
}
removals.clear();
}
synchronized (additions) {
Iterator<Connection> i = additions.iterator();
while (i.hasNext()) {
Connection c = i.next();
System.out.println("socket added: " + c);
sockets.add(c);
}
additions.clear();
}
}
// clears all current connections on Server.
public void reset() {
for (Connection c : sockets) {
c.close();
}
}
/**
* Reads data into an ArrayBlockingQueue<String> where each String
* is a line of input, that was terminated by CRLF (not included)
*/
class Connection extends Thread {
Connection(Socket s) throws IOException {
this.socket = s;
id = counter.incrementAndGet();
is = s.getInputStream();
os = s.getOutputStream();
incoming = new ArrayBlockingQueue<>(100);
setName("Server-Connection");
setDaemon(true);
}
final Socket socket;
final int id;
final InputStream is;
final OutputStream os;
final ArrayBlockingQueue<String> incoming;
volatile String statusLine;
final static String CRLF = "\r\n";
// sentinel indicating connection closed
final static String CLOSED = "C.L.O.S.E.D";
volatile boolean closed = false;
volatile boolean released = false;
@Override
public void run() {
byte[] buf = new byte[256];
String s = "";
try {
while (true) {
int n = is.read(buf);
if (n == -1) {
cleanup();
return;
}
String s0 = new String(buf, 0, n, ISO_8859_1);
s = s + s0;
int i;
while ((i=s.indexOf(CRLF)) != -1) {
String s1 = s.substring(0, i+2);
System.out.println("Server got: " + s1.substring(0,i));
if (statusLine == null) statusLine = s1.substring(0,i);
incoming.put(s1);
if (i+2 == s.length()) {
s = "";
break;
}
s = s.substring(i+2);
}
}
} catch (IOException |InterruptedException e1) {
cleanup();
} catch (Throwable t) {
System.out.println("X: " + t);
cleanup();
}
}
@Override
public String toString() {
return "Server.Connection: " + socket.toString();
}
public void sendHttpResponse(int code, String body, String... headers)
throws IOException
{
String r1 = "HTTP/1.1 " + Integer.toString(code) + " status" + CRLF;
for (int i=0; i<headers.length; i+=2) {
r1 += headers[i] + ": " + headers[i+1] + CRLF;
}
int clen = body == null ? 0 : body.getBytes(ISO_8859_1).length;
r1 += "Content-Length: " + Integer.toString(clen) + CRLF;
r1 += CRLF;
if (body != null) {
r1 += body;
}
send(r1);
}
// content-length is 10 bytes too many
public void sendIncompleteHttpResponseBody(int code) throws IOException {
String body = "Hello World Helloworld Goodbye World";
String r1 = "HTTP/1.1 " + Integer.toString(code) + " status" + CRLF;
int clen = body.getBytes(ISO_8859_1).length + 10;
r1 += "Content-Length: " + Integer.toString(clen) + CRLF;
r1 += CRLF;
if (body != null) {
r1 += body;
}
send(r1);
}
public void sendIncompleteHttpResponseHeaders(int code)
throws IOException
{
String r1 = "HTTP/1.1 " + Integer.toString(code) + " status" + CRLF;
send(r1);
}
public void send(String r) throws IOException {
try {
os.write(r.getBytes(ISO_8859_1));
} catch (IOException x) {
IOException suppressed =
new IOException("MockServer["
+ ss.getLocalPort()
+"] Failed while writing bytes: "
+ x.getMessage());
x.addSuppressed(suppressed);
System.err.println("WARNING: " + suppressed);
throw x;
}
}
public synchronized void close() {
cleanup();
closed = true;
incoming.clear();
}
public String nextInput(long timeout, TimeUnit unit) {
String result = "";
while (poll()) {
try {
String s = incoming.poll(timeout, unit);
if (s == null && closed) {
return CLOSED;
} else {
result += s;
}
} catch (InterruptedException e) {
return null;
}
}
return result;
}
public String nextInput() {
return nextInput(0, TimeUnit.SECONDS);
}
public boolean poll() {
return incoming.peek() != null;
}
private void cleanup() {
if (released) return;
synchronized(this) {
if (released) return;
released = true;
}
try {
socket.close();
} catch (IOException e) {}
synchronized (removals) {
removals.add(this);
}
}
}
MockServer(int port, ServerSocketFactory factory, String root) throws IOException {
ss = factory.createServerSocket(port);
this.root = root; // if specified, any request which don't have this value
// in their statusLine will be rejected.
sockets = Collections.synchronizedList(new LinkedList<>());
removals = new LinkedList<>();
additions = new LinkedList<>();
setName("Test-Server");
setDaemon(true);
}
MockServer(int port, ServerSocketFactory factory) throws IOException {
this(port, factory, "/foo/");
}
MockServer(int port) throws IOException {
this(port, ServerSocketFactory.getDefault());
}
MockServer() throws IOException {
this(0);
}
int port() {
return ss.getLocalPort();
}
public String getURL() {
if (ss instanceof SSLServerSocket) {
return "https://127.0.0.1:" + port() + "/foo/";
} else {
return "http://127.0.0.1:" + port() + "/foo/";
}
}
private volatile boolean closed;
@Override
public void close() {
closed = true;
try {
ss.close();
} catch (IOException e) {
e.printStackTrace();
}
for (Connection c : sockets) {
c.close();
}
}
@Override
public void run() {
try {
while (!closed) {
try {
System.out.println("Server waiting for connection");
Socket s = ss.accept();
Connection c = new Connection(s);
c.start();
System.out.println("Server got new connection: " + c);
synchronized (additions) {
additions.add(c);
}
} catch (IOException e) {
if (closed)
return;
e.printStackTrace(System.out);
}
}
} catch (Throwable t) {
System.out.println("Unexpected exception in accept loop: " + t);
t.printStackTrace(System.out);
} finally {
if (closed) {
System.out.println("Server closed: exiting accept loop");
} else {
System.out.println("Server not closed: exiting accept loop and closing");
close();
}
}
}
}