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<p class="menu"><a href="../mod/">モジュール</a> | <a href="../mod/directives.html">ディレクティブ</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">用語</a> | <a href="../sitemap.html">サイトマップ</a></p>
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<div id="page-content">
<div id="preamble"><h1>Apache モジュール mod_expires</h1>
<div class="toplang">
<p><span>翻訳済ã¿è¨€èªž: </span><a href="../en/mod/mod_expires.html" hreflang="en" rel="alternate" title="English">&nbsp;en&nbsp;</a> |
<a href="../fr/mod/mod_expires.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
<a href="../ja/mod/mod_expires.html" title="Japanese">&nbsp;ja&nbsp;</a> |
<a href="../ko/mod/mod_expires.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
</div>
<div class="outofdate">ã“ã®æ—¥æœ¬èªžè¨³ã¯ã™ã§ã«å¤ããªã£ã¦ã„ã‚‹
            å¯èƒ½æ€§ãŒã‚りã¾ã™ã€‚
            最近更新ã•れãŸå†…容を見るã«ã¯è‹±èªžç‰ˆã‚’ã”覧下ã•ã„。
        </div>
<table class="module"><tr><th><a href="module-dict.html#Description">説明:</a></th><td>ãƒ¦ãƒ¼ã‚¶ã®æŒ‡å®šã—ãŸåŸºæº–ã«åŸºã¥ã„㟠<code>Expires</code> ã¨
<code>Cache-Control</code> HTTP ヘッダã®ç”Ÿæˆ</td></tr>
<tr><th><a href="module-dict.html#Status">ステータス:</a></th><td>Extension</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">モジュール識別å­:</a></th><td>expires_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">ソースファイル:</a></th><td>mod_expires.c</td></tr></table>
<h3>概è¦</h3>

    <p>ã“ã®ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã¯ã‚µãƒ¼ãƒå¿œç­”ã® <code>Expires</code> HTTP ヘッダ
    㨠<code>Cache-Control</code> ヘッダ㮠<code>max-age</code> ディレクティブã®
    設定を制御ã—ã¾ã™ã€‚å…ƒã®ãƒ•ァイルãŒä½œæˆã•ã‚ŒãŸæ™‚刻ã¾ãŸã¯
    クライアントã®ã‚¢ã‚¯ã‚»ã‚¹æ™‚刻ã®ã©ã¡ã‚‰ã‹ã«åŸºã¥ã„ã¦æœŸé™åˆ‡ã‚Œæ—¥ã‚’
    設定ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚</p>

    <p>ã“れらã®ãƒ˜ãƒƒãƒ€ã¯ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã«æ–‡æ›¸ã®
    有効性ã¨ç¶™ç¶šæ€§ã‚’指示ã—ã¾ã™ã€‚文書ãŒã‚­ãƒ£ãƒƒã‚·ãƒ¥ã•れãŸå ´åˆã«ã¯ã€
    指定時刻ã«é”ã™ã‚‹ã¾ã§ã¯ã€å…ƒã®å ´æ‰€ã‹ã‚‰å–å¾—ã™ã‚‹ä»£ã‚りã«
    キャッシュã•れã¦ã„ã‚‹ã‚‚ã®ã‚’使ã†ã“ã¨ãŒã§ãã¾ã™ã€‚ãã®å¾Œã¯ã€
    キャッシュã«ã‚ã‚‹ã‚³ãƒ”ãƒ¼ã¯æœŸé™åˆ‡ã‚Œ (expired) ã§ç„¡åйã§ã‚ã‚‹ã¨ã•れã€
    å…ƒã®å ´æ‰€ã‹ã‚‰æ–°ã—ã„ã‚‚ã®ã‚’å–å¾—ã™ã‚‹å¿…è¦ãŒã‚りã¾ã™ã€‚</p>

    <p><code>max-age</code> 以外 (<a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9">RFC
    2616 section 14.9</a> å‚ç…§) ã® <code>Cache-Control</code> ã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒ†ã‚£ãƒ–ã‚’
    æ“作ã™ã‚‹ã«ã¯ <code class="directive"><a href="../mod/mod_headers.html#header">Header</a></code> ディレクティブを
    使ã†ã“ã¨ãŒã§ãã¾ã™ã€‚</p></div>
<div id="quickview"><h3>トピック</h3>
<ul id="topics">
<li><img alt="" src="../images/down.gif" /> <a href="#AltSyn">代替期間指定構文</a></li>
</ul><h3 class="directives">ディレクティブ</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#expiresactive">ExpiresActive</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#expiresbytype">ExpiresByType</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#expiresdefault">ExpiresDefault</a></li>
</ul>
<ul class="seealso"><li><a href="#comments_section">コメント</a></li></ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="AltSyn" id="AltSyn">代替期間指定構文</a></h2>
   
    <p><code class="directive"><a href="#expiresdefault">ExpiresDefault</a></code> ディレクティブã¨
    <code class="directive"><a href="#expiresbytype">ExpiresByType</a></code> ディレクティブã¯
    以下ã®ã‚ˆã‚Šèª­ã¿æ˜“ã„æ§‹æ–‡ã‚’使ã£ã¦å®šç¾©ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™:</p>

    <div class="example"><p><code>
      ExpiresDefault "&lt;base&gt; [plus] {&lt;num&gt;
      &lt;type&gt;}*"<br />
      ExpiresByType type/encoding "&lt;base&gt; [plus]
      {&lt;num&gt; &lt;type&gt;}*"
    </code></p></div>

    <p>&lt;base&gt; ã¯ä»¥ä¸‹ã®ã©ã‚Œã‹ã§ã™:</p>

    <ul>
      <li><code>access</code></li>

      <li><code>now</code> ('<code>access</code>' ã¨ç­‰ä¾¡)</li>

      <li><code>modification</code></li>
    </ul>

    <p><code>plus</code> キーワードã¯çœç•¥å¯èƒ½ã§ã™ã€‚&lt;num&gt;
    㯠(<code>atoi()</code> ãŒå—ã‘付ã‘ã‚‹) 整数値ã€
    &lt;type&gt; ã¯ä»¥ä¸‹ã®ã©ã‚Œã‹ã§ã™:</p>

    <ul>
      <li><code>years</code></li>
      <li><code>months</code></li>
      <li><code>weeks</code></li>
      <li><code>days</code></li>
      <li><code>hours</code></li>
      <li><code>minutes</code></li>
      <li><code>seconds</code></li>
    </ul>

    <p>例ãˆã°ã€ä»¥ä¸‹ã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒ†ã‚£ãƒ–ã¯ã©ã‚Œã‚‚ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã§æ–‡æ›¸ãŒã‚¢ã‚¯ã‚»ã‚¹ã® 1 ヶ月後ã«
    期é™ãŒåˆ‡ã‚Œã‚‹ã‚ˆã†ã«ã™ã‚‹ãŸã‚ã«ä½¿ãˆã¾ã™:</p>

    <div class="example"><p><code>
      ExpiresDefault "access plus 1 month"<br />
      ExpiresDefault "access plus 4 weeks"<br />
      ExpiresDefault "access plus 30 days"
    </code></p></div>

    <p>期é™åˆ‡ã‚Œæ™‚刻ã¯ã„ãã¤ã‹
    '&lt;num&gt; &lt;type&gt;' 節を追加ã™ã‚‹ã“ã¨ã§ã‚ˆã‚Šç´°ã‹ã
    制御ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™:</p>

    <div class="example"><p><code>
      ExpiresByType text/html "access plus 1 month 15
      days 2 hours"<br />
      ExpiresByType image/gif "modification plus 5 hours 3
      minutes"
    </code></p></div>

    <p>修正時刻ã«åŸºã¥ã„ãŸè¨­å®šã‚’使用ã—ã¦ã„ã‚‹å ´åˆã€Expires ヘッダã¯
    ディスクã®ãƒ•ァイル以外ã®ã‚³ãƒ³ãƒ†ãƒ³ãƒ„ã«ã¯<strong>追加ã•れãªã„</strong>ã“ã¨ã«æ³¨æ„
    ã—ã¦ãã ã•ã„。ãã®ã‚ˆã†ãªã‚³ãƒ³ãƒ†ãƒ³ãƒ„ã«ã¯ä¿®æ­£æ™‚刻ã¯å­˜åœ¨ã—ãªã„ã‹ã‚‰ã§ã™ã€‚</p>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="ExpiresActive" id="ExpiresActive">ExpiresActive</a> <a name="expiresactive" id="expiresactive">ディレクティブ</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">説明:</a></th><td><code>Expires</code> ヘッダã®ç”Ÿæˆã‚’有効ã«ã™ã‚‹</td></tr>
<tr><th><a href="directive-dict.html#Syntax">æ§‹æ–‡:</a></th><td><code>ExpiresActive On|Off</code></td></tr>
<tr><th><a href="directive-dict.html#Context">コンテキスト:</a></th><td>サーãƒè¨­å®šãƒ•ァイル, ãƒãƒ¼ãƒãƒ£ãƒ«ãƒ›ã‚¹ãƒˆ, ディレクトリ, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">上書ã:</a></th><td>Indexes</td></tr>
<tr><th><a href="directive-dict.html#Status">ステータス:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">モジュール:</a></th><td>mod_expires</td></tr>
</table>
    <p>ã“ã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒ†ã‚£ãƒ–ã¯å¯¾å¿œã™ã‚‹ãƒ‰ã‚­ãƒ¥ãƒ¡ãƒ³ãƒˆã®é ˜åŸŸã§
    <code>Expires</code> 㨠<code>Cache-Control</code>ヘッダを
    有効ã«ã™ã‚‹ã‹ç„¡åйã«ã™ã‚‹ã‹ã‚’決ã‚ã¾ã™ã€‚
    (例ãˆã°ã€<code>.htaccess</code> ファイルã§ã¯ãã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã®
    文書ã®ã¿ã«é©ç”¨ã•れるã¨ã„ã†ã“ã¨ã§ã™ã€‚) <code>Off</code> ã«
    設定ã•れãŸå ´åˆã¯å¯¾å¿œé ˜åŸŸã§ãれらã®ãƒ˜ãƒƒãƒ€ã¯
    生æˆã•れã¾ã›ã‚“ (<code>.htaccess</code> ãŒã‚µãƒ¼ãƒè¨­å®šãƒ•ァイルã®è¨­å®šã‚’
    上書ãã™ã‚‹ã€ã¨ã„ã†ã‚ˆã†ãªä¸‹ä½ãƒ¬ãƒ™ãƒ«ã§ã®ä¸Šæ›¸ããŒã•れã¦ã„ãªã‘れã°)。
    <code>On</code> ã«è¨­å®šã•れã¦ã„れã°ã€ãƒ˜ãƒƒãƒ€ã¯ <code class="directive"><a href="#expiresbytype">ExpiresByType</a></code> ディレクティブã¨
    <code class="directive"><a href="#expiresdefault">ExpiresDefault</a></code> ディレクティブ
    ã®åŸºæº–ã«å¾“ã£ã¦æ–‡æ›¸ã«ãƒ˜ãƒƒãƒ€ã‚’追加ã—ã¾ã™ (å„ディレクティブå‚ç…§)。</p>

    <p>ã“ã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒ†ã‚£ãƒ–㯠<code>Expires</code> ã¨
    <code>Cache-Control</code> ヘッダã®å­˜åœ¨ã‚’
    ä¿è¨¼ã™ã‚‹ã‚ã‘ã§ã¯ãªã„ã“ã¨ã«æ³¨æ„ã—ã¦ãã ã•ã„ã€‚åŸºæº–ãŒæº€ãŸã•れã¦
    ã„ãªã„å ´åˆã¯ãƒ˜ãƒƒãƒ€ã¯è¿½åŠ ã•れãšã€çµæžœã¨ã—ã¦ã“ã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒ†ã‚£ãƒ–ãŒ
    指定ã•れã¦ã„ãªã‹ã£ãŸã‹ã®ã‚ˆã†ã«ã•ãˆè¦‹ãˆã‚‹ã“ã¨ã«ãªã‚Šã¾ã™ã€‚</p>

</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="ExpiresByType" id="ExpiresByType">ExpiresByType</a> <a name="expiresbytype" id="expiresbytype">ディレクティブ</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">説明:</a></th><td>MIME タイプã«ã‚ˆã£ã¦è¨­å®šã•れる <code>Expires</code> ヘッダã®å€¤</td></tr>
<tr><th><a href="directive-dict.html#Syntax">æ§‹æ–‡:</a></th><td><code>ExpiresByType <var>MIME-type</var>
<var>&lt;code&gt;seconds</var></code></td></tr>
<tr><th><a href="directive-dict.html#Context">コンテキスト:</a></th><td>サーãƒè¨­å®šãƒ•ァイル, ãƒãƒ¼ãƒãƒ£ãƒ«ãƒ›ã‚¹ãƒˆ, ディレクトリ, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">上書ã:</a></th><td>Indexes</td></tr>
<tr><th><a href="directive-dict.html#Status">ステータス:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">モジュール:</a></th><td>mod_expires</td></tr>
</table>
    <p>ã“ã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒ†ã‚£ãƒ–ã¯æŒ‡å®šã•れãŸã‚¿ã‚¤ãƒ—ã®ãƒ‰ã‚­ãƒ¥ãƒ¡ãƒ³ãƒˆ
    (<em>例ãˆã°</em> <code>text/html</code>)
    ã«å¯¾ã—ã¦ç”Ÿæˆã•れる <code>Expires</code> ヘッダ㨠<code>Cache-Control</code>
    ヘッダ㮠<code>max-age</code> ディレクティブã®å€¤ã‚’定義ã—ã¾ã™ã€‚
    二ã¤ç›®ã®å¼•æ•°ã¯æœŸé™åˆ‡ã‚Œã®æ—¥æ™‚を生æˆã™ã‚‹ãŸã‚ã®åŸºæº–時刻ã«è¿½åŠ ã•れる
    秒数を設定ã—ã¾ã™ã€‚<code>Cache-Control:
    max-age</code> ã¯æœŸé™åˆ‡ã‚Œã®æ™‚刻ã‹ã‚‰ãƒªã‚¯ã‚¨ã‚¹ãƒˆæ™‚刻を引ã„ãŸã‚‚ã®ã‚’ç§’ã§
    表ã™ã“ã¨ã§ç”Ÿæˆã•れã¾ã™ã€‚</p>

    <p>基準時刻ã¯ãƒ•ã‚¡ã‚¤ãƒ«ã®æœ€çµ‚修正時刻ã‹ã€ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã®ãƒ‰ã‚­ãƒ¥ãƒ¡ãƒ³ãƒˆã¸ã®
    アクセス時刻ã§ã™ã€‚ã©ã¡ã‚‰ã‚’使ã†ã¹ãã‹ã¯ <code><var>&lt;code&gt;</var></code>
    ã«ã‚ˆã£ã¦æŒ‡å®šã—ã¾ã™ã€‚<code>M</code> ã¯åŸºæº–時刻ã¨ã—ã¦
    ãƒ•ã‚¡ã‚¤ãƒ«ã®æœ€çµ‚修正時刻をã¨ã„ã†æ„味ã§ã€<code>A</code> ã¯ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã®
    アクセス時刻を使ã†ã¨ã„ã†æ„味ã«ãªã‚Šã¾ã™ã€‚</p>

    <p>効果ã«ã¯å¾®å¦™ãªé•ã„ãŒã‚りã¾ã™ã€‚<code>M</code> ãŒä½¿ç”¨ã•れãŸå ´åˆã¯ã€
    ã™ã¹ã¦ã®ã‚­ãƒ£ãƒƒã‚·ãƒ¥ã«ã‚ã‚‹ç¾åœ¨ã®ãƒ‰ã‚­ãƒ¥ãƒ¡ãƒ³ãƒˆã‚­ãƒ£ãƒƒã‚·ãƒ¥ã¯åŒæ™‚ã«æœŸé™ãŒ
    切れã¾ã™ã€‚ã“れã¯åŒã˜ URL ã«æ¯Žé€±å¸¸ã«ç½®ã‹ã‚Œã‚‹å ±ã›ã®ã‚ˆã†ãªã‚‚ã®ã«ã¯
    éžå¸¸ã«æœ‰åйã§ã™ã€‚<code>A</code> ãŒä½¿ç”¨ã•れãŸå ´åˆã¯ã€æœŸé™åˆ‡ã‚Œã®
    時間ã¯å„クライアントよã£ã¦ç•°ãªã‚Šã¾ã™ã€‚ã“れã¯ã‚ã¾ã‚Šå¤‰æ›´ã•れãªã„
    ç”»åƒãƒ•ァイルãªã©ã€ç‰¹ã«é–¢é€£ã™ã‚‹ãƒ‰ã‚­ãƒ¥ãƒ¡ãƒ³ãƒˆç¾¤ãŒã™ã¹ã¦åŒã˜ç”»åƒã‚’
    å‚ç…§ã™ã‚‹ã¨ã (<em>ã™ãªã‚ã¡</em>ç”»åƒãŒæ¯”è¼ƒçš„çŸ­ã„æœŸé–“内ã«ç¹°ã‚Šè¿”ã—
    アクセスã•れるã¨ã) ã«æœ‰åйã§ã™ã€‚</p>

    <div class="example"><h3>例:</h3><p><code>
      # enable expirations<br />
      ExpiresActive On<br />
      # expire GIF images after a month in the client's cache<br />
      ExpiresByType image/gif A2592000<br />
      # HTML documents are good for a week from the<br />
      # time they were changed<br />
      ExpiresByType text/html M604800
    </code></p></div>

    <p>ã“ã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒ†ã‚£ãƒ–㯠<code>ExpiresActive On</code> ãŒæŒ‡å®šã•れã¦ã„ã‚‹
    ã¨ãã®ã¿æœ‰åйã§ã‚ã‚‹ã“ã¨ã«æ³¨æ„ã—ã¦ãã ã•ã„。ã“れã¯ã€
    指定ã•れ㟠MIME タイプã«å¯¾ã—ã¦<em>ã®ã¿</em> <code class="directive"><a href="#expiresdefault">ExpiresDefault</a></code> ディレクティブã§
    設定ã•ã‚ŒãŸæœŸé™åˆ‡ã‚ŒæœŸæ—¥ã‚’上書ãã—ã¾ã™ã€‚</p>

    <p>ã“ã®æ–‡æ›¸ã®å‰ã®æ–¹ã§èª¬æ˜Žã•れã¦ã„ã‚‹<a href="#AltSyn">代替構文</a>ã‚’
    使ã£ã¦æœŸé™åˆ‡ã‚ŒæœŸæ—¥ã®è¨ˆç®—方法を指定ã™ã‚‹ã“ã¨ã‚‚ã§ãã¾ã™ã€‚</p>

</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="ExpiresDefault" id="ExpiresDefault">ExpiresDefault</a> <a name="expiresdefault" id="expiresdefault">ディレクティブ</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">説明:</a></th><td>期é™åˆ‡ã‚ŒæœŸæ—¥ã‚’計算ã™ã‚‹ãƒ‡ãƒ•ォルトアルゴリズム</td></tr>
<tr><th><a href="directive-dict.html#Syntax">æ§‹æ–‡:</a></th><td><code>ExpiresDefault <var>&lt;code&gt;seconds</var></code></td></tr>
<tr><th><a href="directive-dict.html#Context">コンテキスト:</a></th><td>サーãƒè¨­å®šãƒ•ァイル, ãƒãƒ¼ãƒãƒ£ãƒ«ãƒ›ã‚¹ãƒˆ, ディレクトリ, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">上書ã:</a></th><td>Indexes</td></tr>
<tr><th><a href="directive-dict.html#Status">ステータス:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">モジュール:</a></th><td>mod_expires</td></tr>
</table>
    <p>ã“ã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒ†ã‚£ãƒ–ã¯å¯¾å¿œã™ã‚‹ç¯„囲ã®ã™ã¹ã¦ã®ãƒ‰ã‚­ãƒ¥ãƒ¡ãƒ³ãƒˆã«å¯¾ã—ã¦
    ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã®æœŸé™åˆ‡ã‚ŒæœŸæ—¥ã®è¨ˆç®—アルゴリズムを設定ã—ã¾ã™ã€‚<code class="directive"><a href="#expiresbytype">ExpiresByType</a></code> ディレクティブã«ã‚ˆã£ã¦
    タイプ毎ã«ä¸Šæ›¸ãã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚å¼•æ•°ã®æ§‹æ–‡ã¯ãã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒ†ã‚£ãƒ–ã®
    説明をå‚ç…§ã—ã¦ãã ã•ã„。ã¾ãŸã€<a href="#AltSyn">代替構文</a>ã‚‚
    å‚ç…§ã—ã¦ãã ã•ã„。</p>

</div>
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