com.signalfx.shaded.jetty.http.HttpMethod Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of signalfx-java Show documentation
Show all versions of signalfx-java Show documentation
SignalFx from Java client libraries
//
// ========================================================================
// Copyright (c) 1995-2019 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package com.signalfx.shaded.jetty.http;
import java.nio.ByteBuffer;
import com.signalfx.shaded.jetty.util.ArrayTernaryTrie;
import com.signalfx.shaded.jetty.util.ArrayTrie;
import com.signalfx.shaded.jetty.util.StringUtil;
import com.signalfx.shaded.jetty.util.Trie;
/**
*
*/
public enum HttpMethod
{
GET,
POST,
HEAD,
PUT,
OPTIONS,
DELETE,
TRACE,
CONNECT,
MOVE,
PROXY,
PRI;
/**
* Optimized lookup to find a method name and trailing space in a byte array.
*
* @param bytes Array containing ISO-8859-1 characters
* @param position The first valid index
* @param limit The first non valid index
* @return An HttpMethod if a match or null if no easy match.
*/
public static HttpMethod lookAheadGet(byte[] bytes, final int position, int limit)
{
int length = limit - position;
if (length < 4)
return null;
switch (bytes[position])
{
case 'G':
if (bytes[position + 1] == 'E' && bytes[position + 2] == 'T' && bytes[position + 3] == ' ')
return GET;
break;
case 'P':
if (bytes[position + 1] == 'O' && bytes[position + 2] == 'S' && bytes[position + 3] == 'T' && length >= 5 && bytes[position + 4] == ' ')
return POST;
if (bytes[position + 1] == 'R' && bytes[position + 2] == 'O' && bytes[position + 3] == 'X' && length >= 6 && bytes[position + 4] == 'Y' && bytes[position + 5] == ' ')
return PROXY;
if (bytes[position + 1] == 'U' && bytes[position + 2] == 'T' && bytes[position + 3] == ' ')
return PUT;
if (bytes[position + 1] == 'R' && bytes[position + 2] == 'I' && bytes[position + 3] == ' ')
return PRI;
break;
case 'H':
if (bytes[position + 1] == 'E' && bytes[position + 2] == 'A' && bytes[position + 3] == 'D' && length >= 5 && bytes[position + 4] == ' ')
return HEAD;
break;
case 'O':
if (bytes[position + 1] == 'P' && bytes[position + 2] == 'T' && bytes[position + 3] == 'I' && length >= 8 &&
bytes[position + 4] == 'O' && bytes[position + 5] == 'N' && bytes[position + 6] == 'S' && bytes[position + 7] == ' ')
return OPTIONS;
break;
case 'D':
if (bytes[position + 1] == 'E' && bytes[position + 2] == 'L' && bytes[position + 3] == 'E' && length >= 7 &&
bytes[position + 4] == 'T' && bytes[position + 5] == 'E' && bytes[position + 6] == ' ')
return DELETE;
break;
case 'T':
if (bytes[position + 1] == 'R' && bytes[position + 2] == 'A' && bytes[position + 3] == 'C' && length >= 6 &&
bytes[position + 4] == 'E' && bytes[position + 5] == ' ')
return TRACE;
break;
case 'C':
if (bytes[position + 1] == 'O' && bytes[position + 2] == 'N' && bytes[position + 3] == 'N' && length >= 8 &&
bytes[position + 4] == 'E' && bytes[position + 5] == 'C' && bytes[position + 6] == 'T' && bytes[position + 7] == ' ')
return CONNECT;
break;
case 'M':
if (bytes[position + 1] == 'O' && bytes[position + 2] == 'V' && bytes[position + 3] == 'E' && length >= 5 && bytes[position + 4] == ' ')
return MOVE;
break;
default:
break;
}
return null;
}
/**
* Optimized lookup to find a method name and trailing space in a byte array.
*
* @param buffer buffer containing ISO-8859-1 characters, it is not modified.
* @return An HttpMethod if a match or null if no easy match.
*/
public static HttpMethod lookAheadGet(ByteBuffer buffer)
{
if (buffer.hasArray())
return lookAheadGet(buffer.array(), buffer.arrayOffset() + buffer.position(), buffer.arrayOffset() + buffer.limit());
int l = buffer.remaining();
if (l >= 4)
{
HttpMethod m = CACHE.getBest(buffer, 0, l);
if (m != null)
{
int ml = m.asString().length();
if (l > ml && buffer.get(buffer.position() + ml) == ' ')
return m;
}
}
return null;
}
public static final Trie INSENSITIVE_CACHE = new ArrayTrie<>();
static
{
for (HttpMethod method : HttpMethod.values())
{
INSENSITIVE_CACHE.put(method.toString(), method);
}
}
public static final Trie CACHE = new ArrayTernaryTrie<>(false);
static
{
for (HttpMethod method : HttpMethod.values())
{
CACHE.put(method.toString(), method);
}
}
private final ByteBuffer _buffer;
private final byte[] _bytes;
HttpMethod()
{
_bytes = StringUtil.getBytes(toString());
_buffer = ByteBuffer.wrap(_bytes);
}
public byte[] getBytes()
{
return _bytes;
}
public boolean is(String s)
{
return toString().equalsIgnoreCase(s);
}
public ByteBuffer asBuffer()
{
return _buffer.asReadOnlyBuffer();
}
public String asString()
{
return toString();
}
/**
* Converts the given String parameter to an HttpMethod
*
* @param method the String to get the equivalent HttpMethod from
* @return the HttpMethod or null if the parameter method is unknown
*/
public static HttpMethod fromString(String method)
{
return CACHE.get(method);
}
}