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annotate src/org/eclipse/jetty/http/HttpHeaderValues.java @ 1020:6be43ef1eb96

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HttpHeaderValues uses StringCache
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 31 Oct 2016 22:24:41 -0600
parents 74b9daf2826c
children 3718afd99988
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1 //
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2 // ========================================================================
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
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4 // ------------------------------------------------------------------------
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5 // All rights reserved. This program and the accompanying materials
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6 // are made available under the terms of the Eclipse Public License v1.0
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7 // and Apache License v2.0 which accompanies this distribution.
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8 //
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9 // The Eclipse Public License is available at
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10 // http://www.eclipse.org/legal/epl-v10.html
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11 //
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12 // The Apache License v2.0 is available at
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13 // http://www.opensource.org/licenses/apache2.0.php
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14 //
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15 // You may elect to redistribute this code under either of these licenses.
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16 // ========================================================================
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17 //
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18
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19 package org.eclipse.jetty.http;
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20
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21 import org.eclipse.jetty.io.StringCache;
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22
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23 /**
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24 * Cached HTTP Header values.
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25 * The resource "/org/eclipse/jetty/useragents" is checked for a list of common user agents, so that repeated
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26 * creation of strings for these agents can be avoided.
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27 *
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28 *
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29 */
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30 public final class HttpHeaderValues
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31 {
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32 public final static String
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33 CLOSE="close",
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34 CHUNKED="chunked",
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35 GZIP="gzip",
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36 IDENTITY="identity",
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37 KEEP_ALIVE="keep-alive",
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38 CONTINUE="100-continue",
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39 PROCESSING="102-processing",
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40 TE="TE",
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41 BYTES="bytes",
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42 NO_CACHE="no-cache",
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43 UPGRADE="Upgrade";
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44
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45 public final static int
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46 CLOSE_ORDINAL=1,
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47 CHUNKED_ORDINAL=2,
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48 GZIP_ORDINAL=3,
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49 IDENTITY_ORDINAL=4,
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50 KEEP_ALIVE_ORDINAL=5,
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51 CONTINUE_ORDINAL=6,
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52 PROCESSING_ORDINAL=7,
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53 TE_ORDINAL=8,
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54 BYTES_ORDINAL=9,
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55 NO_CACHE_ORDINAL=10,
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56 UPGRADE_ORDINAL=11;
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57
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58 public final static StringCache CACHE = new StringCache();
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59
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60 public final static byte[]
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61 CLOSE_BYTES=CACHE.add(CLOSE,CLOSE_ORDINAL),
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62 CHUNKED_BYTES=CACHE.add(CHUNKED,CHUNKED_ORDINAL),
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63 GZIP_BYTES=CACHE.add(GZIP,GZIP_ORDINAL),
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64 IDENTITY_BYTES=CACHE.add(IDENTITY,IDENTITY_ORDINAL),
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65 KEEP_ALIVE_BYTES=CACHE.add(KEEP_ALIVE,KEEP_ALIVE_ORDINAL),
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66 CONTINUE_BYTES=CACHE.add(CONTINUE, CONTINUE_ORDINAL),
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67 PROCESSING_BYTES=CACHE.add(PROCESSING, PROCESSING_ORDINAL),
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68 TE_BYTES=CACHE.add(TE,TE_ORDINAL),
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69 BYTES_BYTES=CACHE.add(BYTES,BYTES_ORDINAL),
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70 NO_CACHE_BYTES=CACHE.add(NO_CACHE,NO_CACHE_ORDINAL),
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71 UPGRADE_BYTES=CACHE.add(UPGRADE,UPGRADE_ORDINAL);
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72
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74 public static boolean hasKnownValues(int httpHeaderOrdinal)
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75 {
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76 switch(httpHeaderOrdinal)
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77 {
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78 case HttpHeaders.CONNECTION_ORDINAL:
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79 case HttpHeaders.TRANSFER_ENCODING_ORDINAL:
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80 case HttpHeaders.CONTENT_ENCODING_ORDINAL:
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81 return true;
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82 }
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83 return false;
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84 }
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85 }