140 lines
4.1 KiB
Java
140 lines
4.1 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* 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, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.tomcat.util.http.parser;
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import java.io.IOException;
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import java.io.Reader;
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import java.io.StringReader;
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import org.apache.tomcat.util.buf.ByteChunk;
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import org.apache.tomcat.util.buf.MessageBytes;
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public class Host {
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/**
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* Parse the given input as an HTTP Host header value.
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*
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* @param mb The host header value
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*
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* @return The position of ':' that separates the host from the port or -1
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* if it is not present
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*
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* @throws IllegalArgumentException If the host header value is not
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* specification compliant
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*/
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public static int parse(MessageBytes mb) {
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return parse(new MessageBytesReader(mb));
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}
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/**
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* Parse the given input as an HTTP Host header value.
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*
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* @param string The host header value
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*
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* @return The position of ':' that separates the host from the port or -1
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* if it is not present
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*
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* @throws IllegalArgumentException If the host header value is not
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* specification compliant
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*/
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public static int parse(String string) {
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return parse(new StringReader(string));
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}
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private static int parse(Reader reader) {
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try {
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reader.mark(1);
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int first = reader.read();
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reader.reset();
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if (HttpParser.isAlpha(first)) {
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return HttpParser.readHostDomainName(reader);
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} else if (HttpParser.isNumeric(first)) {
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return HttpParser.readHostIPv4(reader, false);
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} else if ('[' == first) {
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return HttpParser.readHostIPv6(reader);
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} else {
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// Invalid
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throw new IllegalArgumentException();
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}
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} catch (IOException ioe) {
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// Should never happen
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throw new IllegalArgumentException(ioe);
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}
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}
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private static class MessageBytesReader extends Reader {
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private final byte[] bytes;
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private final int end;
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private int pos;
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private int mark;
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public MessageBytesReader(MessageBytes mb) {
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ByteChunk bc = mb.getByteChunk();
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bytes = bc.getBytes();
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pos = bc.getOffset();
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end = bc.getEnd();
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}
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@Override
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public int read(char[] cbuf, int off, int len) throws IOException {
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for (int i = off; i < off + len; i++) {
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// Want output in range 0 to 255, not -128 to 127
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cbuf[i] = (char) (bytes[pos++] & 0xFF);
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}
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return len;
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}
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@Override
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public void close() throws IOException {
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// NO-OP
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}
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// Over-ridden methods to improve performance
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@Override
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public int read() throws IOException {
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if (pos < end) {
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// Want output in range 0 to 255, not -128 to 127
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return bytes[pos++] & 0xFF;
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} else {
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return -1;
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}
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}
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// Methods to support mark/reset
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@Override
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public boolean markSupported() {
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return true;
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}
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@Override
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public void mark(int readAheadLimit) throws IOException {
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mark = pos;
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}
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@Override
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public void reset() throws IOException {
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pos = mark;
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}
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}
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}
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