| // |
| // ======================================================================== |
| // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.fcgi.parser; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.eclipse.jetty.fcgi.FCGI; |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.Logger; |
| |
| /** |
| * <p>A stream content parser parses frame bodies of type STDIN, STDOUT and STDERR.</p> |
| * <p>STDOUT frame bodies are handled specially by {@link ResponseContentParser}. |
| */ |
| public class StreamContentParser extends ContentParser |
| { |
| private static final Logger LOG = Log.getLogger(StreamContentParser.class); |
| |
| private final FCGI.StreamType streamType; |
| private final Parser.Listener listener; |
| private State state = State.LENGTH; |
| private int contentLength; |
| |
| public StreamContentParser(HeaderParser headerParser, FCGI.StreamType streamType, Parser.Listener listener) |
| { |
| super(headerParser); |
| this.streamType = streamType; |
| this.listener = listener; |
| } |
| |
| @Override |
| public Result parse(ByteBuffer buffer) |
| { |
| while (buffer.hasRemaining()) |
| { |
| switch (state) |
| { |
| case LENGTH: |
| { |
| contentLength = getContentLength(); |
| state = State.CONTENT; |
| break; |
| } |
| case CONTENT: |
| { |
| int length = Math.min(contentLength, buffer.remaining()); |
| int limit = buffer.limit(); |
| buffer.limit(buffer.position() + length); |
| ByteBuffer slice = buffer.slice(); |
| buffer.position(buffer.limit()); |
| buffer.limit(limit); |
| contentLength -= length; |
| if (onContent(slice)) |
| return Result.ASYNC; |
| if (contentLength > 0) |
| break; |
| state = State.LENGTH; |
| return Result.COMPLETE; |
| } |
| default: |
| { |
| throw new IllegalStateException(); |
| } |
| } |
| } |
| return Result.PENDING; |
| } |
| |
| @Override |
| public void noContent() |
| { |
| try |
| { |
| listener.onEnd(getRequest()); |
| } |
| catch (Throwable x) |
| { |
| if (LOG.isDebugEnabled()) |
| LOG.debug("Exception while invoking listener " + listener, x); |
| } |
| } |
| |
| protected boolean onContent(ByteBuffer buffer) |
| { |
| try |
| { |
| return listener.onContent(getRequest(), streamType, buffer); |
| } |
| catch (Throwable x) |
| { |
| if (LOG.isDebugEnabled()) |
| LOG.debug("Exception while invoking listener " + listener, x); |
| return false; |
| } |
| } |
| |
| protected void end(int request) |
| { |
| } |
| |
| private enum State |
| { |
| LENGTH, CONTENT |
| } |
| } |