/httpunit-1.7/src/com/meterware/httpunit/HttpHeader.java

package com.meterware.httpunit;

/********************************************************************************************************************

* $Id: HttpHeader.java 908 2008-04-05 08:24:51Z wolfgang_fahl $

*

* Copyright (c) 2006, Russell Gold

*

* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated

* documentation files (the "Software"), to deal in the Software without restriction, including without limitation

* the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and

* to permit persons to whom the Software is furnished to do so, subject to the following conditions:

*

* The above copyright notice and this permission notice shall be included in all copies or substantial portions

* of the Software.

*

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO

* THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF

* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

* DEALINGS IN THE SOFTWARE.

*

*******************************************************************************************************************/

import java.util.*;



/**

 * @author <a href="mailto:russgold@httpunit.org">Russell Gold</a>

 */

public class HttpHeader {



    private String _label;

    private Map    _properties;





    public HttpHeader( String headerString ) {

        this( headerString, null );

    }





    public HttpHeader( String headerString, String defaultLabel ) {

        if (headerString != null) {

            final int index = headerString.indexOf( ' ' );

            if (index < 0) {  // non-conforming header

                _label      = defaultLabel;

                _properties = loadProperties( headerString );

            } else {

                _label      = headerString.substring( 0, index );

                _properties = loadProperties( headerString.substring( index+1 ) );

            }

        }

    }





    public boolean equals( Object obj ) {

        if (!getClass().equals( obj.getClass() ) ) return false;

        return getLabel().equals( ((HttpHeader) obj).getLabel() ) &&

               getProperties().equals( ((HttpHeader) obj).getProperties() );

    }





    public String toString() {

        return getLabel() + " " + getProperties();

    }





    protected String getProperty( String key ) {

        return unQuote( (String) getProperties().get( key ) );

    }





    private String unQuote( String value ) {

        if (value == null || value.length() <= 1 || !value.startsWith( "\"" ) || !value.endsWith( "\"")) return value;



        return value.substring( 1, value.length()-1 );

    }





// Headers have the general format (ignoring unquoted white space):

// header ::= property-def | property-def ',' header

// property-def ::= name '=' value

// name         ::= ID

// value        ::= ID | QUOTED-STRING

//

    static private Map loadProperties( String parameterString ) {

        Properties properties = new Properties();

        char[] chars = parameterString.toCharArray();

        int i = 0;

        StringBuffer sb = new StringBuffer();



        while (i < chars.length) {

            while (i < chars.length && Character.isWhitespace( chars[i] ) ) i++;

            while (i < chars.length && Character.isJavaIdentifierPart( chars[i] ) ) sb.append( chars[i++] );

            String name = sb.toString();

            sb.setLength( 0 );

            while (i < chars.length && chars[i] != '=' ) i++;

            if (i == chars.length) break;

            i++; // skip '='

            while (i < chars.length && Character.isWhitespace( chars[i] ) ) i++;

            if (i == chars.length) break;

            if (chars[i] == '"') {

                sb.append( chars[i++] );

                while (i < chars.length && chars[i] != '"' ) sb.append( chars[i++] );

                sb.append( '"' );

                if (i < chars.length) i++; // skip close quote

            } else {

                while (i < chars.length && Character.isJavaIdentifierPart( chars[i] ) ) sb.append( chars[i++] );

            }

            properties.setProperty( name, sb.toString() );

            sb.setLength( 0 );

            while (i < chars.length && chars[i] != ',' ) i++;

            if (i == chars.length) break;

            i++; // skip '='

        }

        return properties;

    }





    public String getLabel() {

        return _label;

    }





    public Map getProperties() {

        return _properties;

    }

}