001package votorola.g.net; // Copyright 2012, Michael Allan.  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA 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 VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE.
002
003import java.net.*;
004import java.util.*;
005import votorola.g.lang.*;
006
007
008/** CookieHandler utilities.
009  */
010public @ThreadSafe final class CookieHandlerX
011{
012
013    private CookieHandlerX() {}
014
015
016
017    /** Constructs a Cookie header value for a request.
018      *
019      *   @param requestHeaders a map of all other cookie-related request headers.  It
020      *     will not be modified.
021      */
022    public static String newRequestHeader( final URI requestURI,
023      final Map<String, List<String>> requestHeaders, final CookieHandler handler )
024        throws java.io.IOException
025    {
026        final Map<String, List<String>> cookieRequestHeaders = handler.get( requestURI,
027          requestHeaders );
028        final List<String> pairs = cookieRequestHeaders.get( "Cookie" );
029          // as opposed to Cookie2, which I suppose are version 2 cookies, or something
030        final int pN = pairs.size();
031        if( pN == 0 ) return null;
032
033        final StringBuilder b = new StringBuilder( pN * 32/*init capacity, guess*/ );
034        final Iterator<String> p = pairs.iterator();
035        for( ;; )
036        {
037            // Concatenate all key/value pairs as a single header value separated by
038            // semicolons.  Apparently multiple Cookie headers each with a single
039            // key/value pair are (unlike Set-Cookie) non-standard.
040            final String pair = p.next();
041            b.append( pair ); // foo=bar
042            if( !p.hasNext() ) break;
043
044            b.append( ';' );  // foo=bar;
045        }
046        return b.toString();
047    }
048
049
050
051}