| // |
| // ======================================================================== |
| // 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.http; |
| |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.ServiceLoader; |
| |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.Logger; |
| |
| |
| /* ------------------------------------------------------------ */ |
| /** Pre encoded HttpField. |
| * <p>A HttpField that will be cached and used many times can be created as |
| * a {@link PreEncodedHttpField}, which will use the {@link HttpFieldPreEncoder} |
| * instances discovered by the {@link ServiceLoader} to pre-encode the header |
| * for each version of HTTP in use. This will save garbage |
| * and CPU each time the field is encoded into a response. |
| * </p> |
| */ |
| public class PreEncodedHttpField extends HttpField |
| { |
| private final static Logger LOG = Log.getLogger(PreEncodedHttpField.class); |
| private final static HttpFieldPreEncoder[] __encoders; |
| |
| static |
| { |
| List<HttpFieldPreEncoder> encoders = new ArrayList<>(); |
| Iterator<HttpFieldPreEncoder> iter = ServiceLoader.load(HttpFieldPreEncoder.class,PreEncodedHttpField.class.getClassLoader()).iterator(); |
| while (iter.hasNext()) |
| { |
| try |
| { |
| encoders.add(iter.next()); |
| } |
| catch(Error|RuntimeException e) |
| { |
| LOG.debug(e); |
| } |
| } |
| // TODO avoid needing this catch all |
| if (encoders.size()==0) |
| encoders.add(new Http1FieldPreEncoder()); |
| LOG.debug("HttpField encoders loaded: {}",encoders); |
| __encoders = encoders.toArray(new HttpFieldPreEncoder[encoders.size()]); |
| } |
| |
| private final byte[][] _encodedField=new byte[2][]; |
| |
| public PreEncodedHttpField(HttpHeader header,String name,String value) |
| { |
| super(header,name, value); |
| |
| for (HttpFieldPreEncoder e:__encoders) |
| { |
| _encodedField[e.getHttpVersion()==HttpVersion.HTTP_2?1:0]=e.getEncodedField(header,header.asString(),value); |
| } |
| } |
| |
| public PreEncodedHttpField(HttpHeader header,String value) |
| { |
| this(header,header.asString(),value); |
| } |
| |
| public PreEncodedHttpField(String name,String value) |
| { |
| this(null,name,value); |
| } |
| |
| public void putTo(ByteBuffer bufferInFillMode, HttpVersion version) |
| { |
| bufferInFillMode.put(_encodedField[version==HttpVersion.HTTP_2?1:0]); |
| } |
| } |