JaroslavTulach commented on a change in pull request #26: URL: https://github.com/apache/netbeans-html4j/pull/26#discussion_r765428477
########## File path: browser/src/main/java/org/netbeans/html/presenters/browser/SimpleServer.java ########## @@ -0,0 +1,706 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.netbeans.html.presenters.browser; + +import java.io.ByteArrayOutputStream; +import java.io.Closeable; +import java.io.IOException; +import java.io.OutputStream; +import java.io.OutputStreamWriter; +import java.io.UnsupportedEncodingException; +import java.io.Writer; +import java.net.InetSocketAddress; +import java.nio.Buffer; +import java.nio.ByteBuffer; +import java.nio.channels.ClosedByInterruptException; +import java.nio.channels.SelectionKey; +import java.nio.channels.Selector; +import java.nio.channels.ServerSocketChannel; +import java.nio.channels.SocketChannel; +import java.nio.charset.StandardCharsets; +import java.text.DateFormat; +import java.util.ArrayList; +import java.util.Collections; +import java.util.Date; +import java.util.HashMap; +import java.util.Iterator; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Locale; +import java.util.Map; +import java.util.Random; +import java.util.Set; +import java.util.TimeZone; +import java.util.TreeMap; +import java.util.concurrent.Executor; +import java.util.concurrent.Executors; +import java.util.concurrent.ThreadFactory; +import java.util.logging.Level; +import java.util.logging.Logger; +import java.util.regex.Matcher; +import java.util.regex.Pattern; +import org.netbeans.html.boot.spi.Fn; + +final class SimpleServer extends HttpServer<SimpleServer.ReqRes, SimpleServer.ReqRes, Object, SimpleServer.Context> { + private final Map<String, Handler> maps = new TreeMap<>((s1, s2) -> { + if (s1.length() != s2.length()) { + return s2.length() - s1.length(); + } + return s2.compareTo(s1); + }); + private int max; + private int min; + /** + * @GuardedBy("this") + */ + private ServerSocketChannel server; + /** + * @GuardedBy("this") + */ + private Selector connection; + /** + * @GuardedBy("this") + */ + private Thread processor; + private final List<Runnable> pendingActions = new ArrayList<>(); + + private static final Pattern PATTERN_GET = Pattern.compile("(OPTIONS|HEAD|GET|POST|PUT|DELETE) */([^ \\?]*)(\\?[^ ]*)?"); + private static final Pattern PATTERN_HOST = Pattern.compile(".*^Host: *(.*):([0-9]+)$", Pattern.MULTILINE); + private static final Pattern PATTERN_LENGTH = Pattern.compile(".*^Content-Length: ([0-9]+)$", Pattern.MULTILINE); + static final Logger LOG = Logger.getLogger(SimpleServer.class.getName()); + + SimpleServer() { + } + + @Override + void addHttpHandler(Handler h, String path) { + if (!path.startsWith("/")) { + throw new IllegalStateException("Shall start with /: " + path); + } + maps.put(path.substring(1), h); + } + + @Override + void init(int from, int to) throws IOException { + this.connection = Selector.open(); + this.min = from; + this.max = to; + } + + @Override + synchronized void start() throws IOException { + LOG.log(Level.INFO, "Listening for HTTP connections on port {0}", getServer().socket().getLocalPort()); + processor = new Thread(this::mainLoop, "HTTP server"); + processor.start(); + } + + private final synchronized Thread getProcessorThread() { + return processor; + } + + final void assertThread() { + assert Thread.currentThread() == getProcessorThread(); + } + + @Override + String getRequestURI(ReqRes r) { + assertThread(); + return "/" + r.url; + } + + @Override + String getServerName(ReqRes r) { + assertThread(); + return r.hostName; + } + + @Override + int getServerPort(ReqRes r) { + assertThread(); + return r.hostPort; + } + + @Override + String getParameter(ReqRes r, String id) { + assertThread(); + return (String) r.args.get(id); + } + + @Override + String getMethod(ReqRes r) { + assertThread(); + return r.method; + } + + @Override + String getBody(ReqRes r) { + assertThread(); + if (r.body == null) { + return ""; + } else { + return new String(r.body.array(), StandardCharsets.UTF_8); + } + } + + static int endOfHeader(String header) { + return header.indexOf("\r\n\r\n"); + } + + @Override + String getHeader(ReqRes r, String key) { + assertThread(); + for (String l : r.header.split("\r\n")) { + if (l.isEmpty()) { + break; + } + if (l.startsWith(key + ":")) { + return l.substring(key.length() + 1).trim(); + } + } + return null; + } + + @Override + Writer getWriter(ReqRes r) { + assertThread(); + return r.writer; + } + + @Override + void setContentType(ReqRes r, String contentType) { + assertThread(); + r.contentType = contentType; + } + + @Override + void setStatus(ReqRes r, int status) { + assertThread(); + r.status = status; + } + + @Override + OutputStream getOutputStream(ReqRes r) { + assertThread(); + return r.os; + } + + @Override + void suspend(ReqRes r) { + assertThread(); + r.suspended = true; + r.updateOperations(); + } + + @Override + void resume(ReqRes r, Runnable whenReady) { + connectionWakeup(() -> { + assertThread(); + r.suspended = false; + r.updateOperations(); + whenReady.run(); + }); + } + + @Override + void setCharacterEncoding(ReqRes r, String encoding) { + if (!encoding.equals("UTF-8")) { + throw new IllegalStateException(encoding); + } + } + + @Override + void addHeader(ReqRes r, String name, String value) { + assertThread(); + r.headers.put(name, value); + } + + @Override + <WebSocket> void send(WebSocket socket, String s) { + } + + /** + * @return the port to listen to + */ + @Override + public int getPort() { + try { + return getServer().socket().getLocalPort(); + } catch (IOException ex) { + return -1; + } + } + + synchronized void connectionWakeup(Runnable runOnMainLoop) { + Selector localConnection = this.connection; + this.pendingActions.add(runOnMainLoop); + if (localConnection != null) { + localConnection.wakeup(); + } + } + + private void mainLoop() { + ByteBuffer bb = ByteBuffer.allocate(2048); + while (Thread.currentThread() == getProcessorThread()) { + ServerSocketChannel localServer; + Selector localConnection; + Runnable[] pendings; + + SocketChannel toClose = null; + try { + synchronized (this) { + localServer = this.getServer(); + localConnection = this.connection; + pendings = this.pendingActions.toArray(new Runnable[0]); + this.pendingActions.clear(); + } + + LOG.log(Level.FINEST, "Before select status: open server{0}, open connection {1}, pending {2}", + new Object[]{localServer.isOpen(), localConnection.isOpen(), pendings.length} + ); + + for (Runnable r : pendings) { + r.run(); + } + + int amount = localConnection.select(); + + LOG.log(Level.FINEST, "After select: {0}", amount); + if (amount == 0) { + LOG.log(Level.FINE, "No amount after select: {0}", amount); + } + + Set<SelectionKey> readyKeys = localConnection.selectedKeys(); + Iterator<SelectionKey> it = readyKeys.iterator(); + while (it.hasNext()) { + SelectionKey key = it.next(); + LOG.log(Level.FINEST, "Handling key {0}", key.attachment()); + it.remove(); + + if (key.isAcceptable()) { + try { + SocketChannel channel = localServer.accept(); + channel.configureBlocking(false); + SelectionKey another = channel.register( + localConnection, SelectionKey.OP_READ + ); + another.attach(new ReadHeader()); + } catch (ClosedByInterruptException ex) { + LOG.log(Level.WARNING, "Interrupted while accepting", ex); + server.close(); + server = null; + LOG.log(Level.INFO, "Accept server reset"); + } + } else if (key.isReadable()) { + ((Buffer) bb).clear(); + SocketChannel channel = (SocketChannel) key.channel(); + toClose = channel; + channel.read(bb); + ((Buffer) bb).flip(); + + if (key.attachment() instanceof ReadHeader) { + ReadHeader readHeader = (ReadHeader) key.attachment(); + ReqRes nextKey = readHeader.process(key, bb); + if (nextKey != null) { + key.attach(nextKey); + nextKey.updateOperations(); + } + } else if (key.attachment() instanceof ReqRes) { + ReqRes req = (ReqRes) key.attachment(); + req.readBody(key, bb); + req.updateOperations(); + } + } else if (key.isWritable()) { + SocketChannel channel = (SocketChannel) key.channel(); + toClose = channel; + if (key.attachment() instanceof ReqRes) { + ReqRes request = (ReqRes) key.attachment(); + WriteReply write = request.handle(channel); + if (write != null) { + key.attach(write); + write.updateOperations(); + } + } else if (key.attachment() instanceof WriteReply) { + WriteReply write = (WriteReply) key.attachment(); + write.output(channel); + } + } + } + } catch (ThreadDeath td) { + throw td; + } catch (Throwable t) { + LOG.log(Level.SEVERE, "Exception while handling request", t); + if (toClose != null) { + try { + toClose.close(); + } catch (IOException ioEx) { + LOG.log(Level.INFO, "While closing", ioEx); + } + } + } + } + + synchronized (this) { + try { + LOG.fine("Closing connection"); + this.connection.close(); + LOG.fine("Closing server"); + this.getServer().close(); + } catch (IOException ex) { + LOG.log(Level.WARNING, null, ex); + } finally { + notifyAll(); + } + } + LOG.fine("All notified, exiting server"); + } + + private Handler findHandler(String url) { + LOG.log(Level.FINE, "Searching for handler for page {0}", url); + for (Map.Entry<String, Handler> entry : maps.entrySet()) { + if (url.startsWith(entry.getKey())) { + return entry.getValue(); + } + } + throw new IllegalStateException("No mapping for " + url + " among " + maps); + } + + private static void parseArgs(final Map<String, ? super String> context, final String args) { + if (args != null) { + for (String arg : args.substring(1).split("&")) { + String[] valueAndKey = arg.split("="); + if (valueAndKey.length != 2) { + continue; + } + + String key = valueAndKey[1].replaceAll("\\+", " "); Review comment: OK, done in e5285101. -- This is an automated message from the Apache Git Service. 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