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130 lines
3.9 KiB
Java
130 lines
3.9 KiB
Java
/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package ch.boye.httpclientandroidlib.message;
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import java.io.Serializable;
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import ch.boye.httpclientandroidlib.FormattedHeader;
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import ch.boye.httpclientandroidlib.HeaderElement;
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import ch.boye.httpclientandroidlib.ParseException;
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import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
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/**
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* This class represents a raw HTTP header whose content is parsed 'on demand'
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* only when the header value needs to be consumed.
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*
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* @since 4.0
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*/
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public class BufferedHeader implements FormattedHeader, Cloneable, Serializable {
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private static final long serialVersionUID = -2768352615787625448L;
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/**
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* Header name.
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*/
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private final String name;
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/**
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* The buffer containing the entire header line.
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*/
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private final CharArrayBuffer buffer;
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/**
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* The beginning of the header value in the buffer
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*/
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private final int valuePos;
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/**
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* Creates a new header from a buffer.
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* The name of the header will be parsed immediately,
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* the value only if it is accessed.
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*
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* @param buffer the buffer containing the header to represent
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*
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* @throws ParseException in case of a parse error
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*/
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public BufferedHeader(final CharArrayBuffer buffer)
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throws ParseException {
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super();
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if (buffer == null) {
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throw new IllegalArgumentException
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("Char array buffer may not be null");
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}
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int colon = buffer.indexOf(':');
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if (colon == -1) {
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throw new ParseException
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("Invalid header: " + buffer.toString());
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}
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String s = buffer.substringTrimmed(0, colon);
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if (s.length() == 0) {
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throw new ParseException
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("Invalid header: " + buffer.toString());
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}
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this.buffer = buffer;
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this.name = s;
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this.valuePos = colon + 1;
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}
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public String getName() {
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return this.name;
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}
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public String getValue() {
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return this.buffer.substringTrimmed(this.valuePos, this.buffer.length());
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}
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public HeaderElement[] getElements() throws ParseException {
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ParserCursor cursor = new ParserCursor(0, this.buffer.length());
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cursor.updatePos(this.valuePos);
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return BasicHeaderValueParser.DEFAULT
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.parseElements(this.buffer, cursor);
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}
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public int getValuePos() {
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return this.valuePos;
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}
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public CharArrayBuffer getBuffer() {
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return this.buffer;
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}
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public String toString() {
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return this.buffer.toString();
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}
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public Object clone() throws CloneNotSupportedException {
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// buffer is considered immutable
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// no need to make a copy of it
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return super.clone();
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}
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}
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