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//
// ========================================================================
// Copyright (c) 1995-2015 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.util.ArrayList;
/** A HTTP Field
*/
public class HttpField
{
private final static String __zeroquality="q=0";
private final HttpHeader _header;
private final String _name;
private final String _value;
// cached hashcode for case insensitive name
private int hash = 0;
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 int getIntValue()
{
return Integer.valueOf(_value);
}
public long getLongValue()
{
return Long.valueOf(_value);
}
public String[] getValues()
{
ArrayList list = new ArrayList<>();
int state = 0;
int start=0;
int end=0;
StringBuilder builder = new StringBuilder();
for (int i=0;i<_value.length();i++)
{
char c = _value.charAt(i);
switch(state)
{
case 0: // initial white space
switch(c)
{
case '"': // open quote
state=2;
break;
case ',': // ignore leading empty field
break;
case ' ': // more white space
case '\t':
break;
default: // character
start=i;
end=i;
state=1;
}
break;
case 1: // In token
switch(c)
{
case ',': // next field
list.add(_value.substring(start,end+1));
state=0;
break;
case ' ': // more white space
case '\t':
break;
default:
end=i;
}
break;
case 2: // In Quoted
switch(c)
{
case '\\': // next field
state=3;
break;
case '"': // end quote
list.add(builder.toString());
builder.setLength(0);
state=4;
break;
default:
builder.append(c);
}
break;
case 3: // In Quoted Quoted
builder.append(c);
state=2;
break;
case 4: // WS after end quote
switch(c)
{
case ' ': // white space
case '\t': // white space
break;
case ',': // white space
state=0;
break;
default:
throw new IllegalArgumentException("c="+(int)c);
}
break;
}
}
switch(state)
{
case 0:
break;
case 1:
list.add(_value.substring(start,end+1));
break;
case 4:
break;
default:
throw new IllegalArgumentException("state="+state);
}
return list.toArray(new String[list.size()]);
}
/* ------------------------------------------------------------ */
/** Look for a value in a possible multi valued field
* @param search Values to search for
* @return True iff the value is contained in the field value entirely or
* as an element of a quoted comma separated list. List element parameters (eg qualities) are ignored,
* except if they are q=0, in which case the item itself is ignored.
*/
public boolean contains(String search)
{
if (_value==null || search==null)
return _value==search;
if (search.length()==0)
return false;
int state=0;
int match=0;
int param=0;
for (int i=0;i<_value.length();i++)
{
char c = _value.charAt(i);
switch(state)
{
case 0: // initial white space
switch(c)
{
case '"': // open quote
match=0;
state=2;
break;
case ',': // ignore leading empty field
break;
case ';': // ignore leading empty field parameter
param=-1;
match=-1;
state=5;
break;
case ' ': // more white space
case '\t':
break;
default: // character
match = c==search.charAt(0)?1:-1;
state=1;
break;
}
break;
case 1: // In token
switch(c)
{
case ',': // next field
// Have we matched the token?
if (match==search.length())
return true;
state=0;
break;
case ';':
param=match>=0?0:-1;
state=5; // parameter
break;
default:
if (match>0)
{
if (match=0)
{
if (match=0)
{
if (match=0)
{
if (param<__zeroquality.length())
param=c==__zeroquality.charAt(param)?(param+1):-1;
else if (c!='0'&&c!='.'&&c!=' ')
param=-1;
}
}
break;
default:
throw new IllegalStateException();
}
}
return param!=__zeroquality.length() && match==search.length();
}
@Override
public String toString()
{
String v=getValue();
return getName() + ": " + (v==null?"":v);
}
public boolean isSameName(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;
}
private int nameHashCode()
{
int h = this.hash;
int len = _name.length();
if (h == 0 && len > 0)
{
for (int i = 0; i < len; i++)
{
// simple case insensitive hash
char c = _name.charAt(i);
// assuming us-ascii (per last paragraph on http://tools.ietf.org/html/rfc7230#section-3.2.4)
if ((c >= 'a' && c <= 'z'))
c -= 0x20;
h = 31 * h + c;
}
this.hash = h;
}
return h;
}
@Override
public int hashCode()
{
if (_header==null)
return _value.hashCode() ^ nameHashCode();
return _value.hashCode() ^ _header.hashCode();
}
@Override
public boolean equals(Object o)
{
if (o==this)
return true;
if (!(o instanceof HttpField))
return false;
HttpField field=(HttpField)o;
if (_header!=field.getHeader())
return false;
if (!_name.equalsIgnoreCase(field.getName()))
return false;
if (_value==null && field.getValue()!=null)
return false;
if (!_value.equals(field.getValue()))
return false;
return true;
}
public static class IntValueHttpField extends HttpField
{
final int _int;
public IntValueHttpField(HttpHeader header, String name, String value, int intValue)
{
super(header,name,value);
_int=intValue;
}
public IntValueHttpField(HttpHeader header, String value, int intValue)
{
this(header,header.asString(),value,Integer.valueOf(value));
}
public IntValueHttpField(HttpHeader header, String name, String value)
{
this(header,name,value,Integer.valueOf(value));
}
public IntValueHttpField(HttpHeader header, String value)
{
this(header,header.asString(),value);
}
public IntValueHttpField(HttpHeader header, int value)
{
this(header,header.asString(),value);
}
@Override
public int getIntValue()
{
return _int;
}
@Override
public long getLongValue()
{
return _int;
}
}
public static class LongValueHttpField extends HttpField
{
final long _long;
public LongValueHttpField(HttpHeader header, String name, String value, long longValue)
{
super(header,name,value);
_long=longValue;
}
public LongValueHttpField(HttpHeader header, String name, String value)
{
this(header,name,value,Long.valueOf(value));
}
public LongValueHttpField(HttpHeader header, String name, long value)
{
this(header,name,Long.toString(value),value);
}
public LongValueHttpField(HttpHeader header, String value)
{
this(header,header.asString(),value);
}
public LongValueHttpField(HttpHeader header,long value)
{
this(header,header.asString(),value);
}
@Override
public int getIntValue()
{
return (int)_long;
}
@Override
public long getLongValue()
{
return _long;
}
}
}
