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//
// ========================================================================
// Copyright (c) 1995-2013 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.nio.charset.StandardCharsets;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.jetty.util.ArrayTrie;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.Trie;
/* ------------------------------------------------------------ */
/** A HTTP Field
*/
public class HttpField
{
/**
* Cache of common {@link HttpField}s including:
*
Common static combinations such as:
*
Connection: close
*
Accept-Encoding: gzip
*
Content-Length: 0
*
*
Combinations of Content-Type header for common mime types by common charsets
*
Most common headers with null values so that a lookup will at least
* determine the header name even if the name:value combination is not cached
*
*/
public final static Trie CACHE = new ArrayTrie<>(2048);
public final static Trie CONTENT_TYPE = new ArrayTrie<>(512);
static
{
CACHE.put(new CachedHttpField(HttpHeader.CONNECTION,HttpHeaderValue.CLOSE));
CACHE.put(new CachedHttpField(HttpHeader.CONNECTION,HttpHeaderValue.KEEP_ALIVE));
CACHE.put(new CachedHttpField(HttpHeader.CONNECTION,HttpHeaderValue.UPGRADE));
CACHE.put(new CachedHttpField(HttpHeader.ACCEPT_ENCODING,"gzip"));
CACHE.put(new CachedHttpField(HttpHeader.ACCEPT_ENCODING,"gzip, deflate"));
CACHE.put(new CachedHttpField(HttpHeader.ACCEPT_ENCODING,"gzip,deflate,sdch"));
CACHE.put(new CachedHttpField(HttpHeader.ACCEPT_LANGUAGE,"en-US,en;q=0.5"));
CACHE.put(new CachedHttpField(HttpHeader.ACCEPT_LANGUAGE,"en-GB,en-US;q=0.8,en;q=0.6"));
CACHE.put(new CachedHttpField(HttpHeader.ACCEPT_CHARSET,"ISO-8859-1,utf-8;q=0.7,*;q=0.3"));
CACHE.put(new CachedHttpField(HttpHeader.ACCEPT,"*/*"));
CACHE.put(new CachedHttpField(HttpHeader.ACCEPT,"image/png,image/*;q=0.8,*/*;q=0.5"));
CACHE.put(new CachedHttpField(HttpHeader.ACCEPT,"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"));
CACHE.put(new CachedHttpField(HttpHeader.PRAGMA,"no-cache"));
CACHE.put(new CachedHttpField(HttpHeader.CACHE_CONTROL,"private, no-cache, no-cache=Set-Cookie, proxy-revalidate"));
CACHE.put(new CachedHttpField(HttpHeader.CACHE_CONTROL,"no-cache"));
CACHE.put(new CachedHttpField(HttpHeader.CONTENT_LENGTH,"0"));
CACHE.put(new CachedHttpField(HttpHeader.CONTENT_ENCODING,"gzip"));
CACHE.put(new CachedHttpField(HttpHeader.CONTENT_ENCODING,"deflate"));
CACHE.put(new CachedHttpField(HttpHeader.TRANSFER_ENCODING,"chunked"));
CACHE.put(new CachedHttpField(HttpHeader.EXPIRES,"Fri, 01 Jan 1990 00:00:00 GMT"));
// Content types
for (String type : new String[]{"text/plain","text/html","text/xml","text/json","application/x-www-form-urlencoded"})
{
HttpField field=new CachedHttpField(HttpHeader.CONTENT_TYPE,type);
CACHE.put(field);
CONTENT_TYPE.put(type,field);
for (String charset : new String[]{"UTF-8","ISO-8859-1"})
{
String type_charset=type+"; charset="+charset;
field=new CachedHttpField(HttpHeader.CONTENT_TYPE,type_charset);
CACHE.put(field);
CACHE.put(new CachedHttpField(HttpHeader.CONTENT_TYPE,type+";charset="+charset));
CONTENT_TYPE.put(type_charset,field);
CONTENT_TYPE.put(type+";charset="+charset,field);
}
}
// Add headers with null values so HttpParser can avoid looking up name again for unknown values
for (HttpHeader h:HttpHeader.values())
if (!CACHE.put(new HttpField(h,(String)null)))
throw new IllegalStateException("CACHE FULL");
// Add some more common headers
CACHE.put(new HttpField(HttpHeader.REFERER,(String)null));
CACHE.put(new HttpField(HttpHeader.IF_MODIFIED_SINCE,(String)null));
CACHE.put(new HttpField(HttpHeader.IF_NONE_MATCH,(String)null));
CACHE.put(new HttpField(HttpHeader.AUTHORIZATION,(String)null));
CACHE.put(new HttpField(HttpHeader.COOKIE,(String)null));
}
private final static byte[] __colon_space = new byte[] {':',' '};
private final HttpHeader _header;
private final String _name;
private final String _value;
public HttpField(HttpHeader header, String name, String value)
{
_header = header;
_name = name;
_value = value;
}
public HttpField(HttpHeader header, String value)
{
this(header,header.asString(),value);
}
public HttpField(HttpHeader header, HttpHeaderValue value)
{
this(header,header.asString(),value.asString());
}
public HttpField(String name, String value)
{
this(HttpHeader.CACHE.get(name),name,value);
}
public HttpHeader getHeader()
{
return _header;
}
public String getName()
{
return _name;
}
public String getValue()
{
return _value;
}
public boolean contains(String value)
{
if (_value==null)
return false;
if (value.equalsIgnoreCase(_value))
return true;
String[] split = _value.split("\\s*,\\s*");
for (String s : split)
{
if (value.equalsIgnoreCase(s))
return true;
}
return false;
}
public int getIntValue()
{
return StringUtil.toInt(_value);
}
public long getLongValue()
{
return StringUtil.toLong(_value);
}
private static byte[] toSanitisedName(String s)
{
byte[] bytes = s.getBytes(StandardCharsets.ISO_8859_1);
for (int i=bytes.length;i-->0;)
{
switch(bytes[i])
{
case '\r':
case '\n':
case ':' :
bytes[i]=(byte)'?';
}
}
return bytes;
}
private static byte[] toSanitisedValue(String s)
{
byte[] bytes = s.getBytes(StandardCharsets.ISO_8859_1);
for (int i=bytes.length;i-->0;)
{
switch(bytes[i])
{
case '\r':
case '\n':
bytes[i]=(byte)'?';
}
}
return bytes;
}
public void putTo(ByteBuffer bufferInFillMode)
{
if (_header!=null)
{
bufferInFillMode.put(_header.getBytesColonSpace());
bufferInFillMode.put(toSanitisedValue(_value));
}
else
{
bufferInFillMode.put(toSanitisedName(_name));
bufferInFillMode.put(__colon_space);
bufferInFillMode.put(toSanitisedValue(_value));
}
BufferUtil.putCRLF(bufferInFillMode);
}
public void putValueTo(ByteBuffer buffer)
{
buffer.put(toSanitisedValue(_value));
}
@Override
public String toString()
{
String v=getValue();
return getName() + ": " + (v==null?"":v);
}
public boolean isSame(HttpField field)
{
if (field==null)
return false;
if (field==this)
return true;
if (_header!=null && _header==field.getHeader())
return true;
if (_name.equalsIgnoreCase(field.getName()))
return true;
return false;
}
/* ------------------------------------------------------------ */
/** A HTTP Field optimised to be reused.
*/
public static class CachedHttpField extends HttpField
{
final byte[] _bytes;
public CachedHttpField(HttpHeader header, String value)
{
super(header,value);
_bytes=new byte[header.asString().length()+2+value.length()+2];
System.arraycopy(header.getBytesColonSpace(),0,_bytes,0,header.asString().length()+2);
System.arraycopy(toSanitisedValue(value),0,_bytes,header.asString().length()+2,value.length());
_bytes[_bytes.length-2]='\r';
_bytes[_bytes.length-1]='\n';
}
CachedHttpField(HttpHeader header, HttpHeaderValue value)
{
this(header,value.asString());
}
@Override
public void putTo(ByteBuffer bufferInFillMode)
{
bufferInFillMode.put(_bytes);
}
}
}
