Initial revision.

darcs-hash:20050112202454-9977f-60936f24fe2092a30223627e0683de2df61d0c4a.gz

1 files changed, 139 insertions, 0 deletions

diff --git a/inc/io.php b/inc/io.php
new file mode 100644
index 000000000..c84604a43
--- /dev/null
+++ b/inc/io.php
@@ -0,0 +1,139 @@
+<?
+require_once("inc/common.php");
+require_once("inc/parser.php");
+
+
+
+
+/**
+ * Returns the parsed text from the given sourcefile. Uses cache
+ * if exists. Creates it if not.
+ */
+function io_cacheParse($file){
+  global $conf;
+  global $CACHEGROUP;
+  global $parser; //we read parser options
+  $parsed = '';
+  $cache  = $conf['datadir'].'/.cache/';
+  $cache .= md5($file.$_SERVER['HTTP_HOST'].$_SERVER['SERVER_PORT'].$CACHEGROUP);
+  $purge  = $conf['datadir'].'/.cache/purgefile';
+
+  // check if cache can be used
+  $cachetime = @filemtime($cache);
+
+  if(   @file_exists($cache)                          // does the cachefile exist
+     && @file_exists($file)                           // and does the source exist
+     && !isset($_REQUEST['purge'])                    // no purge param was set
+     && filesize($cache)                              // and contains the cachefile any data
+     && ((time() - $cachetime) < $conf['cachetime'])  // and is cachefile young enough
+     && ($cachetime > filemtime($file))               // and newer than the source
+     && ($cachetime > @filemtime($purge))             // and newer than the purgefile
+     && ($cachetime > filemtime('conf/dokuwiki.php')) // and newer than the config file
+     && ($cachetime > @filemtime('conf/local.php'))   // and newer than the local config file
+     && ($cachetime > filemtime('inc/parser.php'))    // and newer than the parser
+     && ($cachetime > filemtime('inc/format.php')))   // and newer than the formating functions
+  {
+    $parsed  = io_readFile($cache); //give back cache
+    $parsed .= "\n<!-- cachefile $cache used -->\n";
+  }elseif(@file_exists($file)){
+    $parsed = parse(io_readFile($file)); //sets global parseroptions
+    if($parser['cache']){
+      io_saveFile($cache,$parsed); //save cachefile
+      $parsed .= "\n<!-- no cachefile used, but created -->\n";
+    }else{
+      @unlink($cache); //try to delete cachefile
+      $parsed .= "\n<!-- no cachefile used, caching forbidden -->\n";
+    }
+  }
+
+  return $parsed;
+}
+
+/**
+ * Returns content of $file as cleaned string. Uses gzip if extension
+ * is .gz
+ */
+function io_readFile($file){
+  $ret = '';
+  if(@file_exists($file)){
+    if(substr($file,-3) == '.gz'){
+      $ret = join('',gzfile($file));
+    }else{
+      $ret = join('',file($file));
+    }
+  }
+  return cleanText($ret);
+}
+
+/**
+ * Saves $content to $file. Uses gzip if extension
+ * is .gz
+ *
+ * returns true on success
+ */
+function io_saveFile($file,$content){
+  io_makeFileDir($file);
+  if(substr($file,-3) == '.gz'){
+    $fh = @gzopen($file,'wb9');
+    if(!$fh){
+      msg("Writing $file failed",-1);
+      return false;
+    }
+    gzwrite($fh, $content);
+    gzclose($fh);
+  }else{
+    $fh = @fopen($file,'wb');
+    if(!$fh){
+      msg("Writing $file failed",-1);
+      return false;
+    }
+    fwrite($fh, $content);
+    fclose($fh);
+  }
+  return true;
+}
+
+/**
+ * Create the directory needed for the given file
+ */
+function io_makeFileDir($file){
+  global $conf;
+
+  $dir  = dirname($file);
+  umask($conf['dmask']);
+  if(!is_dir($dir)){
+    io_mkdir_p($dir) || msg("Creating directory $dir failed",-1);
+  }
+  umask($conf['umask']); 
+}
+
+/**
+ * Creates a directory hierachy.
+ *
+ * @see    http://www.php.net/manual/en/function.mkdir.php
+ * @author <saint@corenova.com>
+ */
+function io_mkdir_p($target){
+  if (is_dir($target)||empty($target)) return 1; // best case check first
+  if (@file_exists($target) && !is_dir($target)) return 0;
+  if (io_mkdir_p(substr($target,0,strrpos($target,'/'))))
+    return @mkdir($target,0777); // crawl back up & create dir tree
+  return 0;
+}
+
+/**
+ * Runs an external command and returns it's output as string
+ * inspired by a patch by Harry Brueckner <harry_b@eml.cc>
+ */
+function io_runcmd($cmd){
+  $fh = popen($cmd, "r");
+  if(!$fh) return false;
+  $ret = '';
+  while (!feof($fh)) {
+    $ret .= fread($fh, 8192);
+  }
+  pclose($fh);
+  return $ret;
+}
+
+?>