michael@0: /*
michael@0:  * ====================================================================
michael@0:  * Licensed to the Apache Software Foundation (ASF) under one
michael@0:  * or more contributor license agreements.  See the NOTICE file
michael@0:  * distributed with this work for additional information
michael@0:  * regarding copyright ownership.  The ASF licenses this file
michael@0:  * to you under the Apache License, Version 2.0 (the
michael@0:  * "License"); you may not use this file except in compliance
michael@0:  * with the License.  You may obtain a copy of the License at
michael@0:  *
michael@0:  *   http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  * Unless required by applicable law or agreed to in writing,
michael@0:  * software distributed under the License is distributed on an
michael@0:  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
michael@0:  * KIND, either express or implied.  See the License for the
michael@0:  * specific language governing permissions and limitations
michael@0:  * under the License.
michael@0:  * ====================================================================
michael@0:  *
michael@0:  * This software consists of voluntary contributions made by many
michael@0:  * individuals on behalf of the Apache Software Foundation.  For more
michael@0:  * information on the Apache Software Foundation, please see
michael@0:  * <http://www.apache.org/>.
michael@0:  *
michael@0:  */
michael@0: 
michael@0: package ch.boye.httpclientandroidlib.impl.cookie;
michael@0: 
michael@0: import java.util.ArrayList;
michael@0: import java.util.List;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.annotation.Immutable;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.HeaderElement;
michael@0: import ch.boye.httpclientandroidlib.NameValuePair;
michael@0: import ch.boye.httpclientandroidlib.ParseException;
michael@0: import ch.boye.httpclientandroidlib.message.BasicHeaderElement;
michael@0: import ch.boye.httpclientandroidlib.message.BasicNameValuePair;
michael@0: import ch.boye.httpclientandroidlib.message.ParserCursor;
michael@0: import ch.boye.httpclientandroidlib.protocol.HTTP;
michael@0: import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
michael@0: 
michael@0: /**
michael@0:  *
michael@0:  * @since 4.0
michael@0:  */
michael@0: @Immutable
michael@0: public class NetscapeDraftHeaderParser {
michael@0: 
michael@0:     public final static NetscapeDraftHeaderParser DEFAULT = new NetscapeDraftHeaderParser();
michael@0: 
michael@0:     public NetscapeDraftHeaderParser() {
michael@0:         super();
michael@0:     }
michael@0: 
michael@0:     public HeaderElement parseHeader(
michael@0:             final CharArrayBuffer buffer,
michael@0:             final ParserCursor cursor) throws ParseException {
michael@0:         if (buffer == null) {
michael@0:             throw new IllegalArgumentException("Char array buffer may not be null");
michael@0:         }
michael@0:         if (cursor == null) {
michael@0:             throw new IllegalArgumentException("Parser cursor may not be null");
michael@0:         }
michael@0:         NameValuePair nvp = parseNameValuePair(buffer, cursor);
michael@0:         List<NameValuePair> params = new ArrayList<NameValuePair>();
michael@0:         while (!cursor.atEnd()) {
michael@0:             NameValuePair param = parseNameValuePair(buffer, cursor);
michael@0:             params.add(param);
michael@0:         }
michael@0:         return new BasicHeaderElement(
michael@0:                 nvp.getName(),
michael@0:                 nvp.getValue(), params.toArray(new NameValuePair[params.size()]));
michael@0:     }
michael@0: 
michael@0:     private NameValuePair parseNameValuePair(
michael@0:             final CharArrayBuffer buffer, final ParserCursor cursor) {
michael@0:         boolean terminated = false;
michael@0: 
michael@0:         int pos = cursor.getPos();
michael@0:         int indexFrom = cursor.getPos();
michael@0:         int indexTo = cursor.getUpperBound();
michael@0: 
michael@0:         // Find name
michael@0:         String name = null;
michael@0:         while (pos < indexTo) {
michael@0:             char ch = buffer.charAt(pos);
michael@0:             if (ch == '=') {
michael@0:                 break;
michael@0:             }
michael@0:             if (ch == ';') {
michael@0:                 terminated = true;
michael@0:                 break;
michael@0:             }
michael@0:             pos++;
michael@0:         }
michael@0: 
michael@0:         if (pos == indexTo) {
michael@0:             terminated = true;
michael@0:             name = buffer.substringTrimmed(indexFrom, indexTo);
michael@0:         } else {
michael@0:             name = buffer.substringTrimmed(indexFrom, pos);
michael@0:             pos++;
michael@0:         }
michael@0: 
michael@0:         if (terminated) {
michael@0:             cursor.updatePos(pos);
michael@0:             return new BasicNameValuePair(name, null);
michael@0:         }
michael@0: 
michael@0:         // Find value
michael@0:         String value = null;
michael@0:         int i1 = pos;
michael@0: 
michael@0:         while (pos < indexTo) {
michael@0:             char ch = buffer.charAt(pos);
michael@0:             if (ch == ';') {
michael@0:                 terminated = true;
michael@0:                 break;
michael@0:             }
michael@0:             pos++;
michael@0:         }
michael@0: 
michael@0:         int i2 = pos;
michael@0:         // Trim leading white spaces
michael@0:         while (i1 < i2 && (HTTP.isWhitespace(buffer.charAt(i1)))) {
michael@0:             i1++;
michael@0:         }
michael@0:         // Trim trailing white spaces
michael@0:         while ((i2 > i1) && (HTTP.isWhitespace(buffer.charAt(i2 - 1)))) {
michael@0:             i2--;
michael@0:         }
michael@0:         value = buffer.substring(i1, i2);
michael@0:         if (terminated) {
michael@0:             pos++;
michael@0:         }
michael@0:         cursor.updatePos(pos);
michael@0:         return new BasicNameValuePair(name, value);
michael@0:     }
michael@0: 
michael@0: }