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