Add html cache for ru wiki

wiki/.htaccess

@@ -1,15 +1,62 @@
-# Use mod_rewrite to enable "Clean URLs" for a PmWiki installation.
 RewriteEngine On
-# Define the rewrite base.
+# Define the rewrite base. This is the URL of the directory that the
+# .htaccess file (if using) resides in
 RewriteBase /wiki
+# Catch requests for index.anything
+#RewriteRule ^index / [R=301]
+# Send requests without parameters to pmwiki.php.
+RewriteRule ^$           pmwiki.php  [L]
+# Send requests for index.php to pmwiki.php.
+RewriteRule ^index\.php$ pmwiki.php  [L]
+
+# Non-capital first letter means that it's not a wiki page
+RewriteRule ^[a-z].*$ - [L]
 
 # Auto redirect to https.
 RewriteCond %{HTTPS} off
 RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
 
-# Send requests without parameters to pmwiki.php.
-RewriteRule ^$           pmwiki.php  [L]
-# Send requests for index.php to pmwiki.php.
-RewriteRule ^index\.php$ pmwiki.php  [L]
-# Send requests to pmwiki.php, appending the query string part.
-RewriteRule ^([A-Z0-9\xa0-\xff].*)$ pmwiki.php?n=$1  [QSA,L]
+
+## Define the rules that exclude things from the cache:
+# If any of these conditions are true ...
+
+# Posting a form request
+RewriteCond %{REQUEST_METHOD} POST [OR]
+# A session exists -> the user is signed in
+RewriteCond %{HTTP_COOKIE} PHPSESSID [OR]
+# A query string exists; ie. we're not just viewing a page
+RewriteCond %{QUERY_STRING} .
+
+# ... serve the file using pmwiki.php
+RewriteRule ^(.*)$ pmwiki.php?n=$1 [QSA,L]
+
+
+## If we're this far in the script it's ok to serve files from the cache
+
+# Root means that we want the wiki homepage
+RewriteCond %{REQUEST_URI} ^/$
+# Does the file exist?
+# Change 'Main.HomePage' here if you're using a different page
+RewriteCond /wiki/htmlcache/Main.HomePage.html -f
+# If so, serve it.
+# Change 'Main.HomePage' here if you're using a different page
+RewriteRule ^$ htmlcache/Main.HomePage.html [L]
+
+# No . or / in the URL means that we want the group main page
+RewriteCond %{REQUEST_URI} ^/([^./?]+)[./]?$
+# Does the file exist?
+# Change '%1.%1' here if you're using a different group main page format
+RewriteCond /wiki/htmlcache/%1.%1.html -f
+# If so, serve it.
+RewriteRule ^. htmlcache/%1.%1.html [L]
+
+# We want Group.Page
+RewriteCond %{REQUEST_URI} ^/([^./]+)[./]([^./]+)/?$
+# Does the file exist?
+RewriteCond /wiki/htmlcache/%1.%2.html -f
+# If so, serve it.
+RewriteRule ^. htmlcache/%1.%2.html [L]
+
+
+# Cache misses and anything that doesn't fit the above goes to pmwiki.php
+RewriteRule ^(.*)$ pmwiki.php?n=$1 [QSA,L]

wiki/cookbook/fastcache.php

@@ -0,0 +1,159 @@
+<?php if (!defined('PmWiki')) exit();
+
+/*	=== FastCache ===
+ *	Copyright 2007-09 Eemeli Aro <eemeli@gmail.com>
+ *
+ *	Caches complete wiki pages for very fast retrieval.
+ *
+ *	Developed and tested using the PmWiki 2.2.0 series.
+ *
+ *	To install, add the following line to your local/config.php file :
+		include_once("$FarmD/cookbook/fastcache.php");
+ *
+ *	For more information, please see the online documentation at
+ *		http://www.pmwiki.org/wiki/Cookbook/FastCache
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License, Version 2, as
+ *	published by the Free Software Foundation.
+ *	http://www.gnu.org/copyleft/gpl.html
+ *	This program is distributed in the hope that it will be useful,
+ *	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *	GNU General Public License for more details.
+ *	
+ *	Updated for PHP5.5-7.4 by Petko Yotov pmwiki.org/petko
+ */
+
+$RecipeInfo['FastCache']['Version'] = '2020-10-17';
+
+Markup( 'nofastcache', 'directives', '/\\(:nofastcache:\\)/i', "NoFastCache" );
+function NoFastCache(){
+  $GLOBALS['FastCacheValid'] = FALSE;
+  return "";
+}
+
+SDV( $FastCacheDir, "$FarmD/htmlcache" );
+SDV( $FastCacheValid, (
+  empty($_POST) &&
+  ( empty($_GET) || ( array_keys($_GET) == array('n') ) ) &&
+  ( empty($_SESSION) || ( $_SESSION == array( 'authid' => '' ) ) ) &&
+  ( empty( $_REQUEST[ ini_get('session.name') ] ) ) # suggested by MagicBeanDip
+  && ( empty( $_COOKIE[ ini_get('session.name') ] ) ) # Petko: PHP5.3+ cookies are not in $_REQUEST
+) );
+
+if ( !IsEnabled( $EnableFastCache, TRUE ) || !$FastCacheDir ) return;
+
+if ($FastCacheValid) $HandleActions['browse'] = 'HandleFastCacheBrowse';
+$EditFunctions[] = 'FastCacheUpdate';
+
+
+function FastCacheUpdate($pagename, &$page, &$new) {
+  global $IsPagePosted;
+  global $FastCacheDir, $FastCacheInvalidateAllOnUpdate;
+  if ( !$IsPagePosted || !$FastCacheDir ) return;
+  if ( IsEnabled( $FastCacheInvalidateAllOnUpdate, TRUE ) ) {
+    if ( is_dir($FastCacheDir) && ( $fd = opendir($FastCacheDir) ) ) {
+      while ( ( $fh = readdir($fd) ) !== FALSE ) {
+        if ( $fh[0] == '.' ) continue;
+        if ( !unlink("$FastCacheDir/$fh") ) {
+          StopWatch("FastCacheUpdate: error unlinking file $FastCacheDir/$fh > stopping");
+          return;
+        }
+      }
+    } else {
+      StopWatch("FastCacheUpdate: error opening directory $FastCacheDir");
+      return;
+    }
+  } else {
+    SDV( $FastCacheSuffix, '.html' );
+    $fcfile = "$FastCacheDir/$pagename$FastCacheSuffix";
+    if ( is_file($fcfile) )
+      if ( !unlink($fcfile) )
+        StopWatch("FastCacheUpdate: error unlinking file $fcfile");
+  }
+}
+
+
+## based on HandleBrowse in pmwiki.php
+function HandleFastCacheBrowse($pagename, $auth = 'read') {
+  # handle display of a page
+  global $DefaultPageTextFmt, $PageNotFoundHeaderFmt, $HTTPHeaders,
+    $EnableHTMLCache, $NoHTMLCache, $PageCacheFile, $LastModTime, $IsHTMLCached,
+    $FmtV, $HandleBrowseFmt, $PageStartFmt, $PageEndFmt, $PageRedirectFmt;
+  ## begin added
+  global $FastCachePage, $FastCacheDir, $FastCacheValid, $FastCacheSuffix;
+  if ( !$FastCacheValid || !$FastCacheDir ) { HandleBrowse($pagename, $auth); return; }
+  SDV( $FastCacheSuffix, '.html' );
+  $fcfile = "$FastCacheDir/$pagename$FastCacheSuffix";
+  if ( @filemtime($fcfile) > $LastModTime ) {
+    if ( $FastCachePage = file_get_contents($fcfile) ) {
+      StopWatch("HandleFastCacheBrowse: using FastCached copy of $pagename");
+      echo $FastCachePage;
+    } else {
+      $FastCacheValid = FALSE;
+      StopWatch("HandleFastCacheBrowse: read error on $fcfile");
+      HandleBrowse($pagename, $auth);
+    }
+	return;
+  }
+  ## end added
+  $page = RetrieveAuthPage($pagename, $auth, true, READPAGE_CURRENT);
+  if (!$page) Abort("?cannot read $pagename");
+  PCache($pagename,$page);
+  if (PageExists($pagename)) $text = @$page['text'];
+  else {
+    $FastCacheValid = FALSE; ## added
+    SDV($DefaultPageTextFmt,'(:include $[{$SiteGroup}.PageNotFound]:)');
+    $text = FmtPageName($DefaultPageTextFmt, $pagename);
+    SDV($PageNotFoundHeaderFmt, 'HTTP/1.1 404 Not Found');
+    SDV($HTTPHeaders['status'], $PageNotFoundHeaderFmt);
+  }
+  $opt = array();
+  SDV($PageRedirectFmt,"<p><i>($[redirected from] <a rel='nofollow'
+    href='{\$PageUrl}?action=edit'>{\$FullName}</a>)</i></p>\$HTMLVSpace\n");
+  if (@!$_GET['from']) { $opt['redirect'] = 1; $PageRedirectFmt = ''; }
+  else $PageRedirectFmt = FmtPageName($PageRedirectFmt, $_GET['from']);
+  if (@$EnableHTMLCache && !$NoHTMLCache && $PageCacheFile &&
+      @filemtime($PageCacheFile) > $LastModTime) {
+    list($ctext) = unserialize(file_get_contents($PageCacheFile));
+    $FmtV['$PageText'] = "<!--cached-->$ctext";
+    $IsHTMLCached = 1;
+    StopWatch("HandleFastCacheBrowse: using HTMLCached copy"); ## modified
+  } else {
+    $IsHTMLCached = 0;
+    $text = '(:groupheader:)'.@$text.'(:groupfooter:)';
+    $t1 = time();
+    $FmtV['$PageText'] = MarkupToHTML($pagename, $text, $opt);
+    if (@$EnableHTMLCache > 0 && !$NoHTMLCache && $PageCacheFile
+        && (time() - $t1 + 1) >= $EnableHTMLCache) {
+      $fp = @fopen("$PageCacheFile,new", "x");
+      if ($fp) {
+        StopWatch("HandleFastCacheBrowse: HTMLCaching page"); ## modified
+        fwrite($fp, serialize(array($FmtV['$PageText']))); fclose($fp);
+        rename("$PageCacheFile,new", $PageCacheFile);
+      }
+    }
+  }
+  SDV($HandleBrowseFmt,array(&$PageStartFmt, &$PageRedirectFmt, '$PageText',
+    &$PageEndFmt));
+  ## begin modified
+  if ($FastCacheValid) {
+    ob_start();
+    PrintFmt($pagename,$HandleBrowseFmt);
+    $FastCachePage = ob_get_contents();
+    ob_end_flush();
+    mkdirp(dirname($fcfile));
+    if ( $FastCacheValid && ( $fc = fopen( "$fcfile,new", 'x' ) ) ) {
+      StopWatch( "HandleFastCacheBrowse: FastCaching $pagename" );
+      fwrite( $fc, $FastCachePage );
+      fclose($fc);
+      rename( "$fcfile,new", $fcfile );
+    } else {
+      StopWatch( "HandleFastCacheBrowse: error writing cache to $fcfile,new" );
+    }
+  } else {
+    PrintFmt($pagename,$HandleBrowseFmt);
+  }
+  ## end modified
+}

wiki/local/config.php

@@ -4,6 +4,7 @@
 ##  Also, be sure to take a look at http://www.pmwiki.org/wiki/Cookbook
 ##  for more details on the types of customizations that can be added
 ##  to PmWiki.
+include_once("cookbook/fastcache.php");
 
 ##  $WikiTitle is the name that appears in the browser's title bar.
 $WikiTitle = 'Вики справка Graph Online';

wiki/pub/htmlcache/.gitignore

@@ -0,0 +1 @@
+*.html