diff options
| author |   hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 03:10:21 -0500 |
|---|---|---|
| committer | hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 03:10:21 -0500 |
| commit | c0b7206652b2852bc574694e7ba07ba1c2acdc00 (patch) | |
| tree | 5cb95cb0e19e03610525903df46279df2c3b7eb1 /rubbos/app/apache2/manual/howto/ssi.html.en | |
| parent | b6d3d6e668b793220f2d3af1bc3e828553dc3fe6 (diff) | |
delete app
Change-Id: Id4c572809969ebe89e946e88063eaed262cff3f2
Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/apache2/manual/howto/ssi.html.en')
| -rw-r--r-- | rubbos/app/apache2/manual/howto/ssi.html.en | 486 |
1 files changed, 0 insertions, 486 deletions
diff --git a/rubbos/app/apache2/manual/howto/ssi.html.en b/rubbos/app/apache2/manual/howto/ssi.html.en deleted file mode 100644 index f03a467d..00000000 --- a/rubbos/app/apache2/manual/howto/ssi.html.en +++ /dev/null @@ -1,486 +0,0 @@ -<?xml version="1.0" encoding="ISO-8859-1"?> -<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> -<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!-- - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - This file is generated from xml source: DO NOT EDIT - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - --> -<title>Apache Tutorial: Introduction to Server Side Includes - Apache HTTP Server</title> -<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> -<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> -<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /> -<link href="../images/favicon.ico" rel="shortcut icon" /></head> -<body id="manual-page"><div id="page-header"> -<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p> -<p class="apache">Apache HTTP Server Version 2.0</p> -<img alt="" src="../images/feather.gif" /></div> -<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> -<div id="path"> -<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.0</a> > <a href="./">How-To / Tutorials</a></div><div id="page-content"><div id="preamble"><h1>Apache Tutorial: Introduction to Server Side Includes</h1> -<div class="toplang"> -<p><span>Available Languages: </span><a href="../en/howto/ssi.html" title="English"> en </a> | -<a href="../ja/howto/ssi.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | -<a href="../ko/howto/ssi.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p> -</div> - -<p>Server-side includes provide a means to add dynamic content to -existing HTML documents.</p> -</div> -<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#related">Introduction</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#what">What are SSI?</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#configuring">Configuring your server to permit SSI</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#basic">Basic SSI directives</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#additionalexamples">Additional examples</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#config">What else can I config?</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#exec">Executing commands</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#advanced">Advanced SSI techniques</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#conclusion">Conclusion</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="related" id="related">Introduction</a></h2> - <table class="related"><tr><th>Related Modules</th><th>Related Directives</th></tr><tr><td><ul><li><code class="module"><a href="../mod/mod_include.html">mod_include</a></code></li><li><code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code></li><li><code class="module"><a href="../mod/mod_expires.html">mod_expires</a></code></li></ul></td><td><ul><li><code class="directive"><a href="../mod/core.html#options">Options</a></code></li><li><code class="directive"><a href="../mod/mod_include.html#xbithack">XBitHack</a></code></li><li><code class="directive"><a href="../mod/mod_mime.html#addtype">AddType</a></code></li><li><code class="directive"><a href="../mod/core.html#setoutputfilter">SetOutputFilter</a></code></li><li><code class="directive"><a href="../mod/mod_setenvif.html#browsermatchnocase">BrowserMatchNoCase</a></code></li></ul></td></tr></table> - - <p>This article deals with Server Side Includes, usually called - simply SSI. In this article, I'll talk about configuring your - server to permit SSI, and introduce some basic SSI techniques - for adding dynamic content to your existing HTML pages.</p> - - <p>In the latter part of the article, we'll talk about some of - the somewhat more advanced things that can be done with SSI, - such as conditional statements in your SSI directives.</p> - -</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="what" id="what">What are SSI?</a></h2> - - <p>SSI (Server Side Includes) are directives that are placed in - HTML pages, and evaluated on the server while the pages are - being served. They let you add dynamically generated content to - an existing HTML page, without having to serve the entire page - via a CGI program, or other dynamic technology.</p> - - <p>The decision of when to use SSI, and when to have your page - entirely generated by some program, is usually a matter of how - much of the page is static, and how much needs to be - recalculated every time the page is served. SSI is a great way - to add small pieces of information, such as the current time. - But if a majority of your page is being generated at the time - that it is served, you need to look for some other - solution.</p> -</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="configuring" id="configuring">Configuring your server to permit SSI</a></h2> - - - <p>To permit SSI on your server, you must have the following - directive either in your <code>httpd.conf</code> file, or in a - <code>.htaccess</code> file:</p> -<div class="example"><p><code> - Options +Includes -</code></p></div> - - <p>This tells Apache that you want to permit files to be parsed - for SSI directives. Note that most configurations contain - multiple <code class="directive"><a href="../mod/core.html#options">Options</a></code> directives - that can override each other. You will probably need to apply the - <code>Options</code> to the specific directory where you want SSI - enabled in order to assure that it gets evaluated last.</p> - - <p>Not just any file is parsed for SSI directives. You have to - tell Apache which files should be parsed. There are two ways to - do this. You can tell Apache to parse any file with a - particular file extension, such as <code>.shtml</code>, with - the following directives:</p> -<div class="example"><p><code> - AddType text/html .shtml<br /> - AddOutputFilter INCLUDES .shtml -</code></p></div> - - <p>One disadvantage to this approach is that if you wanted to - add SSI directives to an existing page, you would have to - change the name of that page, and all links to that page, in - order to give it a <code>.shtml</code> extension, so that those - directives would be executed.</p> - - <p>The other method is to use the <code class="directive"><a href="../mod/mod_include.html#xbithack">XBitHack</a></code> directive:</p> -<div class="example"><p><code> - XBitHack on -</code></p></div> - - <p><code class="directive"><a href="../mod/mod_include.html#xbithack">XBitHack</a></code> - tells Apache to parse files for SSI - directives if they have the execute bit set. So, to add SSI - directives to an existing page, rather than having to change - the file name, you would just need to make the file executable - using <code>chmod</code>.</p> -<div class="example"><p><code> - chmod +x pagename.html -</code></p></div> - - <p>A brief comment about what not to do. You'll occasionally - see people recommending that you just tell Apache to parse all - <code>.html</code> files for SSI, so that you don't have to - mess with <code>.shtml</code> file names. These folks have - perhaps not heard about <code class="directive"><a href="../mod/mod_include.html#xbithack">XBitHack</a></code>. The thing to - keep in mind is that, by doing this, you're requiring that - Apache read through every single file that it sends out to - clients, even if they don't contain any SSI directives. This - can slow things down quite a bit, and is not a good idea.</p> - - <p>Of course, on Windows, there is no such thing as an execute - bit to set, so that limits your options a little.</p> - - <p>In its default configuration, Apache does not send the last - modified date or content length HTTP headers on SSI pages, - because these values are difficult to calculate for dynamic - content. This can prevent your document from being cached, and - result in slower perceived client performance. There are two - ways to solve this:</p> - - <ol> - <li>Use the <code>XBitHack Full</code> configuration. This - tells Apache to determine the last modified date by looking - only at the date of the originally requested file, ignoring - the modification date of any included files.</li> - - <li>Use the directives provided by - <code class="module"><a href="../mod/mod_expires.html">mod_expires</a></code> to set an explicit expiration - time on your files, thereby letting browsers and proxies - know that it is acceptable to cache them.</li> - </ol> -</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="basic" id="basic">Basic SSI directives</a></h2> - - <p>SSI directives have the following syntax:</p> -<div class="example"><p><code> - <!--#element attribute=value attribute=value ... --> -</code></p></div> - - <p>It is formatted like an HTML comment, so if you don't have - SSI correctly enabled, the browser will ignore it, but it will - still be visible in the HTML source. If you have SSI correctly - configured, the directive will be replaced with its - results.</p> - - <p>The element can be one of a number of things, and we'll talk - some more about most of these in the next installment of this - series. For now, here are some examples of what you can do with - SSI</p> - -<h3><a name="todaysdate" id="todaysdate">Today's date</a></h3> - -<div class="example"><p><code> - <!--#echo var="DATE_LOCAL" --> -</code></p></div> - - <p>The <code>echo</code> element just spits out the value of a - variable. There are a number of standard variables, which - include the whole set of environment variables that are - available to CGI programs. Also, you can define your own - variables with the <code>set</code> element.</p> - - <p>If you don't like the format in which the date gets printed, - you can use the <code>config</code> element, with a - <code>timefmt</code> attribute, to modify that formatting.</p> - -<div class="example"><p><code> - <!--#config timefmt="%A %B %d, %Y" --><br /> - Today is <!--#echo var="DATE_LOCAL" --> -</code></p></div> - - -<h3><a name="lastmodified" id="lastmodified">Modification date of the file</a></h3> - -<div class="example"><p><code> - This document last modified <!--#flastmod file="index.html" --> -</code></p></div> - - <p>This element is also subject to <code>timefmt</code> format - configurations.</p> - - -<h3><a name="cgi" id="cgi">Including the results of a CGI program</a></h3> - - <p>This is one of the more common uses of SSI - to output the - results of a CGI program, such as everybody's favorite, a ``hit - counter.''</p> - -<div class="example"><p><code> - <!--#include virtual="/cgi-bin/counter.pl" --> -</code></p></div> - - -</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="additionalexamples" id="additionalexamples">Additional examples</a></h2> - - - <p>Following are some specific examples of things you can do in - your HTML documents with SSI.</p> - -<h3><a name="docmodified" id="docmodified">When was this document -modified?</a></h3> - - <p>Earlier, we mentioned that you could use SSI to inform the - user when the document was most recently modified. However, the - actual method for doing that was left somewhat in question. The - following code, placed in your HTML document, will put such a - time stamp on your page. Of course, you will have to have SSI - correctly enabled, as discussed above.</p> -<div class="example"><p><code> - <!--#config timefmt="%A %B %d, %Y" --><br /> - This file last modified <!--#flastmod file="ssi.shtml" --> -</code></p></div> - - <p>Of course, you will need to replace the - <code>ssi.shtml</code> with the actual name of the file that - you're referring to. This can be inconvenient if you're just - looking for a generic piece of code that you can paste into any - file, so you probably want to use the - <code>LAST_MODIFIED</code> variable instead:</p> -<div class="example"><p><code> - <!--#config timefmt="%D" --><br /> - This file last modified <!--#echo var="LAST_MODIFIED" --> -</code></p></div> - - <p>For more details on the <code>timefmt</code> format, go to - your favorite search site and look for <code>strftime</code>. The - syntax is the same.</p> - - -<h3><a name="standard-footer" id="standard-footer">Including a standard footer</a></h3> - - - <p>If you are managing any site that is more than a few pages, - you may find that making changes to all those pages can be a - real pain, particularly if you are trying to maintain some kind - of standard look across all those pages.</p> - - <p>Using an include file for a header and/or a footer can - reduce the burden of these updates. You just have to make one - footer file, and then include it into each page with the - <code>include</code> SSI command. The <code>include</code> - element can determine what file to include with either the - <code>file</code> attribute, or the <code>virtual</code> - attribute. The <code>file</code> attribute is a file path, - <em>relative to the current directory</em>. That means that it - cannot be an absolute file path (starting with /), nor can it - contain ../ as part of that path. The <code>virtual</code> - attribute is probably more useful, and should specify a URL - relative to the document being served. It can start with a /, - but must be on the same server as the file being served.</p> -<div class="example"><p><code> - <!--#include virtual="/footer.html" --> -</code></p></div> - - <p>I'll frequently combine the last two things, putting a - <code>LAST_MODIFIED</code> directive inside a footer file to be - included. SSI directives can be contained in the included file, - and includes can be nested - that is, the included file can - include another file, and so on.</p> - - -</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="config" id="config">What else can I config?</a></h2> - - - <p>In addition to being able to <code>config</code> the time - format, you can also <code>config</code> two other things.</p> - - <p>Usually, when something goes wrong with your SSI directive, - you get the message</p> -<div class="example"><p><code> - [an error occurred while processing this directive] -</code></p></div> - - <p>If you want to change that message to something else, you - can do so with the <code>errmsg</code> attribute to the - <code>config</code> element:</p> -<div class="example"><p><code> - <!--#config errmsg="[It appears that you don't know how to use SSI]" --> -</code></p></div> - - <p>Hopefully, end users will never see this message, because - you will have resolved all the problems with your SSI - directives before your site goes live. (Right?)</p> - - <p>And you can <code>config</code> the format in which file - sizes are returned with the <code>sizefmt</code> attribute. You - can specify <code>bytes</code> for a full count in bytes, or - <code>abbrev</code> for an abbreviated number in Kb or Mb, as - appropriate.</p> - </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="exec" id="exec">Executing commands</a></h2> - - - <p>I expect that I'll have an article some time in the coming - months about using SSI with small CGI programs. For now, here's - something else that you can do with the <code>exec</code> - element. You can actually have SSI execute a command using the - shell (<code>/bin/sh</code>, to be precise - or the DOS shell, - if you're on Win32). The following, for example, will give you - a directory listing.</p> -<div class="example"><p><code> - <pre><br /> - <!--#exec cmd="ls" --><br /> - </pre> -</code></p></div> - - <p>or, on Windows</p> -<div class="example"><p><code> - <pre><br /> - <!--#exec cmd="dir" --><br /> - </pre> -</code></p></div> - - <p>You might notice some strange formatting with this directive - on Windows, because the output from <code>dir</code> contains - the string ``<<code>dir</code>>'' in it, which confuses - browsers.</p> - - <p>Note that this feature is exceedingly dangerous, as it will - execute whatever code happens to be embedded in the - <code>exec</code> tag. If you have any situation where users - can edit content on your web pages, such as with a - ``guestbook'', for example, make sure that you have this - feature disabled. You can allow SSI, but not the - <code>exec</code> feature, with the <code>IncludesNOEXEC</code> - argument to the <code>Options</code> directive.</p> - </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="advanced" id="advanced">Advanced SSI techniques</a></h2> - - - <p>In addition to spitting out content, Apache SSI gives you - the option of setting variables, and using those variables in - comparisons and conditionals.</p> - -<h3><a name="caveat" id="caveat">Caveat</a></h3> - - <p>Most of the features discussed in this article are only - available to you if you are running Apache 1.2 or later. Of - course, if you are not running Apache 1.2 or later, you need to - upgrade immediately, if not sooner. Go on. Do it now. We'll - wait.</p> - - -<h3><a name="variables" id="variables">Setting variables</a></h3> - - <p>Using the <code>set</code> directive, you can set variables - for later use. We'll need this later in the discussion, so - we'll talk about it here. The syntax of this is as follows:</p> -<div class="example"><p><code> - <!--#set var="name" value="Rich" --> -</code></p></div> - - <p>In addition to merely setting values literally like that, you - can use any other variable, including <a href="../env.html">environment variables</a> or the variables - discussed above (like <code>LAST_MODIFIED</code>, for example) to - give values to your variables. You will specify that something is - a variable, rather than a literal string, by using the dollar sign - ($) before the name of the variable.</p> - - <div class="example"><p><code> <!--#set var="modified" value="$LAST_MODIFIED" --> - </code></p></div> - - <p>To put a literal dollar sign into the value of your - variable, you need to escape the dollar sign with a - backslash.</p> -<div class="example"><p><code> - <!--#set var="cost" value="\$100" --> -</code></p></div> - - <p>Finally, if you want to put a variable in the midst of a - longer string, and there's a chance that the name of the - variable will run up against some other characters, and thus be - confused with those characters, you can place the name of the - variable in braces, to remove this confusion. (It's hard to - come up with a really good example of this, but hopefully - you'll get the point.)</p> -<div class="example"><p><code> - <!--#set var="date" value="${DATE_LOCAL}_${DATE_GMT}" --> -</code></p></div> - - -<h3><a name="conditional" id="conditional">Conditional expressions</a></h3> - - - <p>Now that we have variables, and are able to set and compare - their values, we can use them to express conditionals. This - lets SSI be a tiny programming language of sorts. - <code class="module"><a href="../mod/mod_include.html">mod_include</a></code> provides an <code>if</code>, - <code>elif</code>, <code>else</code>, <code>endif</code> - structure for building conditional statements. This allows you - to effectively generate multiple logical pages out of one - actual page.</p> - - <p>The structure of this conditional construct is:</p> -<div class="example"><p><code> - <!--#if expr="test_condition" --><br /> - <!--#elif expr="test_condition" --><br /> - <!--#else --><br /> - <!--#endif --> -</code></p></div> - - <p>A <em>test_condition</em> can be any sort of logical - comparison - either comparing values to one another, or testing - the ``truth'' of a particular value. (A given string is true if - it is nonempty.) For a full list of the comparison operators - available to you, see the <code class="module"><a href="../mod/mod_include.html">mod_include</a></code> - documentation. Here are some examples of how one might use this - construct.</p> - - <p>In your configuration file, you could put the following - line:</p> -<div class="example"><p><code> - BrowserMatchNoCase macintosh Mac<br /> - BrowserMatchNoCase MSIE InternetExplorer -</code></p></div> - - <p>This will set environment variables ``Mac'' and - ``InternetExplorer'' to true, if the client is running Internet - Explorer on a Macintosh.</p> - - <p>Then, in your SSI-enabled document, you might do the - following:</p> -<div class="example"><p><code> - <!--#if expr="${Mac} && ${InternetExplorer}" --><br /> - Apologetic text goes here<br /> - <!--#else --><br /> - Cool JavaScript code goes here<br /> - <!--#endif --> -</code></p></div> - - <p>Not that I have anything against IE on Macs - I just - struggled for a few hours last week trying to get some - JavaScript working on IE on a Mac, when it was working - everywhere else. The above was the interim workaround.</p> - - <p>Any other variable (either ones that you define, or normal - environment variables) can be used in conditional statements. - With Apache's ability to set environment variables with the - <code>SetEnvIf</code> directives, and other related directives, - this functionality can let you do some pretty involved dynamic - stuff without ever resorting to CGI.</p> - -</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="conclusion" id="conclusion">Conclusion</a></h2> - - <p>SSI is certainly not a replacement for CGI, or other - technologies used for generating dynamic web pages. But it is a - great way to add small amounts of dynamic content to pages, - without doing a lot of extra work.</p> -</div></div> -<div class="bottomlang"> -<p><span>Available Languages: </span><a href="../en/howto/ssi.html" title="English"> en </a> | -<a href="../ja/howto/ssi.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | -<a href="../ko/howto/ssi.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p> -</div><div id="footer"> -<p class="apache">Copyright 2009 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p> -<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div> -</body></html>
\ No newline at end of file |