forked from GNUsocial/gnu-social
Added minify plugin
This commit is contained in:
Craig Andrews
@@ -0,0 +1,44 @@
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<?php
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set_include_path(get_include_path() . PATH_SEPARATOR . realpath(dirname(__FILE__) . '/../../min/lib'));
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require 'HTTP/ConditionalGet.php';
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// emulate regularly updating document
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$every = 20;
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$lastModified = round(time()/$every)*$every - $every;
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$cg = new HTTP_ConditionalGet(array(
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'lastModifiedTime' => $lastModified
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));
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if ($cg->cacheIsValid) {
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$cg->sendHeaders();
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// we're done
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exit();
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}
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// generate content
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$title = 'Last-Modified is known : add Content-Length';
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$explain = '
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<p>Here, like <a href="./">the first example</a>, we know the Last-Modified time,
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but we also want to set the Content-Length to increase cacheability and allow
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HTTP persistent connections. Instead of sending headers immediately, we first
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generate our content, then use <code>setContentLength(strlen($content))</code>
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to add the header. Then finally call <code>sendHeaders()</code> and send the
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content.</p>
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<p><strong>Note:</strong> This is not required if your PHP config buffers all
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output and your script doesn\'t do any incremental flushing of the output
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buffer. PHP will generally set Content-Length for you if it can.</p>
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<p>This script emulates a document that changes every ' .$every. ' seconds.
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<br>This is version: ' . date('r', $lastModified) . '</p>
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';
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require '_include.php';
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$content = get_content(array(
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'title' => $title
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,'explain' => $explain
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));
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$cg->setContentLength(strlen($content));
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$cg->sendHeaders();
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send_slowly($content);
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@@ -0,0 +1,40 @@
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<?php
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set_include_path(get_include_path() . PATH_SEPARATOR . realpath(dirname(__FILE__) . '/../../min/lib'));
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require 'HTTP/ConditionalGet.php';
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// generate content first (not ideal)
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// emulate regularly updating document
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$every = 20;
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$lastModified = round(time()/$every)*$every - $every;
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$title = 'Last-Modified is unknown : use hash of content for ETag';
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$explain = '
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<p>When Last-Modified is unknown, you can still use ETags, but you need a short
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string that is unique for that content. In the worst case, you have to generate
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all the content first, <em>then</em> instantiate HTTP_ConditionalGet, setting
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the array key <code>contentHash</code> to the output of a hash function of the
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content. Since we have the full content, we might as well also use
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<code>setContentLength(strlen($content))</code> in the case where we need to
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send it.</p>
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<p>This script emulates a document that changes every ' .$every. ' seconds.
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<br>This is version: ' . date('r', $lastModified) . '</p>
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';
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require '_include.php';
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$content = get_content(array(
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'title' => $title
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,'explain' => $explain
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));
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$cg = new HTTP_ConditionalGet(array(
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'contentHash' => substr(md5($content), 7)
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));
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if ($cg->cacheIsValid) {
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$cg->sendHeaders();
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// we're done
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exit();
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}
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$cg->setContentLength(strlen($content));
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$cg->sendHeaders();
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send_slowly($content);
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@@ -0,0 +1,49 @@
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<?php
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set_include_path(get_include_path() . PATH_SEPARATOR . realpath(dirname(__FILE__) . '/../../min/lib'));
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require 'HTTP/ConditionalGet.php';
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// emulate regularly updating document
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$every = 20;
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$lastModified = round(time()/$every)*$every - $every;
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require 'HTTP/Encoder.php';
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list($enc,) = HTTP_Encoder::getAcceptedEncoding();
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$cg = new HTTP_ConditionalGet(array(
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'lastModifiedTime' => $lastModified
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,'encoding' => $enc
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));
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$cg->sendHeaders();
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if ($cg->cacheIsValid) {
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// we're done
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exit();
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}
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// output encoded content
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$title = 'ConditionalGet + Encoder';
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$explain = '
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<p>Using ConditionalGet and Encoder is straightforward. First impliment the
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ConditionalGet, then if the cache is not valid, encode and send the content</p>
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<p>This script emulates a document that changes every ' .$every. ' seconds.
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<br>This is version: ' . date('r', $lastModified) . '</p>
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';
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require '_include.php';
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$content = get_content(array(
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'title' => $title
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,'explain' => $explain
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));
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$he = new HTTP_Encoder(array(
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'content' => get_content(array(
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'title' => $title
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,'explain' => $explain
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))
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));
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$he->encode();
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// usually you would just $he->sendAll(), but here we want to emulate slow
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// connection
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$he->sendHeaders();
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send_slowly($he->getContent());
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@@ -0,0 +1,27 @@
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<?php
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set_include_path(get_include_path() . PATH_SEPARATOR . realpath(dirname(__FILE__) . '/../../min/lib'));
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require 'HTTP/ConditionalGet.php';
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// far expires
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$cg = new HTTP_ConditionalGet(array(
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'maxAge' => 20
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,'lastModifiedTime' => filemtime(__FILE__)
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));
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$cg->sendHeaders();
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// generate, send content
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$title = 'Last-Modified + Expires';
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$explain = '
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<p>Here we set a static "lastModifiedTime" and "maxAge" to 20. The browser
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will consider this document fresh for 20 seconds, then revalidate its cache. After
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the 304 response, the cache will be good for another 20 seconds. Unless you force
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a reload, there will only be 304 responses for this page after the initial download.
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';
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require '_include.php';
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echo get_content(array(
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'title' => $title
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,'explain' => $explain
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));
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@@ -0,0 +1,64 @@
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<?php
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function send_slowly($content)
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{
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$half = ceil(strlen($content) / 2);
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$content = str_split($content, $half);
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while ($chunk = array_shift($content)) {
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sleep(1);
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echo $chunk;
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ob_get_level() && ob_flush();
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flush();
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}
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}
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function get_content($data)
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{
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ob_start();
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?>
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>HTTP_ConditionalGet : <?php echo $data['title']; ?></title>
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</head>
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<body>
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<h1>HTTP_ConditionalGet</h1>
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<h2><?php echo $data['title']; ?></h2>
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<?php echo $data['explain']; ?>
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<ul>
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<li><a href="./">Last-Modified is known : simple usage</a></li>
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<li><a href="2.php">Last-Modified is known : add Content-Length</a></li>
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<li><a href="3.php">Last-Modified is unknown : use hash of content for ETag</a></li>
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<li><a href="4.php">ConditionalGet + Encoder</a></li>
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<li><a href="5.php">Last-Modified + Expires</a></li>
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</ul>
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<h2>Notes</h2>
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<h3>How to distinguish 200 and 304 responses</h3>
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<p>For these pages all 200 responses are sent in chunks a second apart, so you
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should notice that 304 responses are quicker. You can also use HTTP sniffers
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like <a href="http://www.fiddlertool.com/">Fiddler (win)</a> and
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<a href="http://livehttpheaders.mozdev.org/">LiveHTTPHeaders (Firefox add-on)</a>
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to verify headers and content being sent.</p>
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<h3>Browser notes</h3>
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<dl>
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<dt>Opera</dt>
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<dd>Opera has a couple behaviors against the HTTP spec: Manual refreshes (F5)
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prevents the ETag/If-Modified-Since headers from being sent; it only sends
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them when following a link or bookmark. Also, Opera will not honor the
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<code>must-revalidate</code> Cache-Control value unless <code>max-age</code>
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is set. To get Opera to follow the spec, ConditionalGet will send Opera max-age=0
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(if one is not already set).</dd>
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<dt>Safari</dt>
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<dd>ETag validation is unsupported, but Safari supports HTTP/1.0 validation via
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If-Modified-Since headers as long as the cache is explicitly marked
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"public" or "private" ("private" is default in ConditionalGet).</dd>
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</dl>
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</body>
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</html>
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<?php
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$content = ob_get_contents();
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ob_end_clean();
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return $content;
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}
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@@ -0,0 +1,36 @@
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<?php
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set_include_path(get_include_path() . PATH_SEPARATOR . realpath(dirname(__FILE__) . '/../../min/lib'));
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require 'HTTP/ConditionalGet.php';
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// emulate regularly updating document
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$every = 20;
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$lastModified = round(time()/$every)*$every - $every;
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$cg = new HTTP_ConditionalGet(array(
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'lastModifiedTime' => $lastModified
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));
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$cg->sendHeaders();
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if ($cg->cacheIsValid) {
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// we're done
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exit();
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}
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$title = 'Last-Modified is known : simple usage';
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$explain = '
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<p>If your content has not changed since a certain timestamp, set this via the
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the <code>lastModifiedTime</code> array key when instantiating HTTP_ConditionalGet.
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You can immediately call the method <code>sendHeaders()</code> to set the
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Last-Modified, ETag, and Cache-Control headers. The, if <code>cacheIsValid</code>
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property is false, you echo the content.</p>
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<p>This script emulates a document that changes every ' .$every. ' seconds.
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<br>This is version: ' . date('r', $lastModified) . '</p>
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';
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require '_include.php';
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echo send_slowly(get_content(array(
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'title' => $title
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,'explain' => $explain
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)));
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