Jake Slack | 03928ae | 2014-05-13 18:41:56 -0700 | [diff] [blame] | 1 | // |
| 2 | // ======================================================================== |
| 3 | // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| 4 | // ------------------------------------------------------------------------ |
| 5 | // All rights reserved. This program and the accompanying materials |
| 6 | // are made available under the terms of the Eclipse Public License v1.0 |
| 7 | // and Apache License v2.0 which accompanies this distribution. |
| 8 | // |
| 9 | // The Eclipse Public License is available at |
| 10 | // http://www.eclipse.org/legal/epl-v10.html |
| 11 | // |
| 12 | // The Apache License v2.0 is available at |
| 13 | // http://www.opensource.org/licenses/apache2.0.php |
| 14 | // |
| 15 | // You may elect to redistribute this code under either of these licenses. |
| 16 | // ======================================================================== |
| 17 | // |
| 18 | |
| 19 | package org.eclipse.jetty.http; |
| 20 | |
| 21 | import org.eclipse.jetty.io.Buffer; |
| 22 | import org.eclipse.jetty.io.BufferCache; |
| 23 | import org.eclipse.jetty.io.ByteArrayBuffer; |
| 24 | |
| 25 | /** |
| 26 | * Cached HTTP Header values. |
| 27 | * This class caches the conversion of common HTTP Header values to and from {@link ByteArrayBuffer} instances. |
| 28 | * The resource "/org/eclipse/jetty/useragents" is checked for a list of common user agents, so that repeated |
| 29 | * creation of strings for these agents can be avoided. |
| 30 | * |
| 31 | * |
| 32 | */ |
| 33 | public class HttpHeaderValues extends BufferCache |
| 34 | { |
| 35 | public final static String |
| 36 | CLOSE="close", |
| 37 | CHUNKED="chunked", |
| 38 | GZIP="gzip", |
| 39 | IDENTITY="identity", |
| 40 | KEEP_ALIVE="keep-alive", |
| 41 | CONTINUE="100-continue", |
| 42 | PROCESSING="102-processing", |
| 43 | TE="TE", |
| 44 | BYTES="bytes", |
| 45 | NO_CACHE="no-cache", |
| 46 | UPGRADE="Upgrade"; |
| 47 | |
| 48 | public final static int |
| 49 | CLOSE_ORDINAL=1, |
| 50 | CHUNKED_ORDINAL=2, |
| 51 | GZIP_ORDINAL=3, |
| 52 | IDENTITY_ORDINAL=4, |
| 53 | KEEP_ALIVE_ORDINAL=5, |
| 54 | CONTINUE_ORDINAL=6, |
| 55 | PROCESSING_ORDINAL=7, |
| 56 | TE_ORDINAL=8, |
| 57 | BYTES_ORDINAL=9, |
| 58 | NO_CACHE_ORDINAL=10, |
| 59 | UPGRADE_ORDINAL=11; |
| 60 | |
| 61 | public final static HttpHeaderValues CACHE= new HttpHeaderValues(); |
| 62 | |
| 63 | public final static Buffer |
| 64 | CLOSE_BUFFER=CACHE.add(CLOSE,CLOSE_ORDINAL), |
| 65 | CHUNKED_BUFFER=CACHE.add(CHUNKED,CHUNKED_ORDINAL), |
| 66 | GZIP_BUFFER=CACHE.add(GZIP,GZIP_ORDINAL), |
| 67 | IDENTITY_BUFFER=CACHE.add(IDENTITY,IDENTITY_ORDINAL), |
| 68 | KEEP_ALIVE_BUFFER=CACHE.add(KEEP_ALIVE,KEEP_ALIVE_ORDINAL), |
| 69 | CONTINUE_BUFFER=CACHE.add(CONTINUE, CONTINUE_ORDINAL), |
| 70 | PROCESSING_BUFFER=CACHE.add(PROCESSING, PROCESSING_ORDINAL), |
| 71 | TE_BUFFER=CACHE.add(TE,TE_ORDINAL), |
| 72 | BYTES_BUFFER=CACHE.add(BYTES,BYTES_ORDINAL), |
| 73 | NO_CACHE_BUFFER=CACHE.add(NO_CACHE,NO_CACHE_ORDINAL), |
| 74 | UPGRADE_BUFFER=CACHE.add(UPGRADE,UPGRADE_ORDINAL); |
| 75 | |
| 76 | |
| 77 | public static boolean hasKnownValues(int httpHeaderOrdinal) |
| 78 | { |
| 79 | switch(httpHeaderOrdinal) |
| 80 | { |
| 81 | case HttpHeaders.CONNECTION_ORDINAL: |
| 82 | case HttpHeaders.TRANSFER_ENCODING_ORDINAL: |
| 83 | case HttpHeaders.CONTENT_ENCODING_ORDINAL: |
| 84 | return true; |
| 85 | } |
| 86 | return false; |
| 87 | } |
| 88 | } |