+++ /dev/null
-<?php
-
-# This is a replacement for the ewiki.php internal MySQL database access
-# interface; this one saves all WikiPages in so called "flat files", and
-# there are now two different formats you can choose from:
-# * rfc822-style (or say message/http like),
-# which leads to files you can edit with any available text editor
-# * in a compressed and faster 'binary' format,
-# which supports more functionality (hit counting)
-# enable with EWIKI_DB_FAST_FILES set to 1
-# As this plugin can read both, you are free to switch at any time.
-#
-# To enable it, just include() this plugin __before__ the main/core
-# ewiki.php script using:
-#
-# include("plugins/db/flat_files.php");
-#
-# If you only will use the file database, you could go to the bottom of the
-# "ewiki.php" script and replace the 'ewiki_database_mysql' class with the
-# one defined herein. Then make also sure, that the initialization code knows
-# about it (there is a class name reference in $ewiki_plugins["database"]).
-#
-# db_flat_files
-# -------------
-# The config option EWIKI_DBFILES_DIRECTORY must point to a directory
-# allowing write access for www-data (the user id, under which webservers
-# run usually), use 'chmod 757 dirname/' (from ftp or shell) to achieve this
-#
-# db_fast_files
-# -------------
-# Some versions of PHP and zlib do not work correctly under Win32, so
-# you should disable it either in the php.ini, or via .htaccess:
-# php_option disable_functions "gzopen gzread gzwrite gzseek gzclose"
-# You need the plugins/db/fakezlib.php script for very old PHP versions.
-#
-# db_fast_files` code was contributed_by("Carsten Senf <ewiki@csenf.de>");
-
-
-#-- choose flat file format
-define("EWIKI_DB_FAST_FILES", 0);
-define("EWIKI_DBFF_ACCURATE", 0);
-
-
-#-- plugin registration
-$ewiki_plugins["database"][0] = "ewiki_database_files";
-
-
-#-- backend
-class ewiki_database_files {
-
- function ewiki_database_files() {
- }
-
-
- function GET($id, $version=false) {
-
- if (!$version && !($version = $this->LASTVER($id))) {
- return;
- }
- #-- read file
- $dbfile = $this->FN("$id.$version");
- if ($f = @gzopen($dbfile, "rb")) {
- $dat = gzread($f, 1<<21);
- gzclose($f);
- }
-
- #-- decode
- if ($dat && (substr($dat, 0, 2) == "a:")) {
- $r = unserialize($dat);
- }
- if (empty($r)) {
- $r = array();
- $p = strpos($dat, "\012\015\012");
- $p2 = strpos($dat, "\012\012");
- if ((!$p2) || ($p) && ($p < $p2)) {
- $p = $p + 3;
- }
- else {
- $p = $p2 + 2;
- }
- $r["content"] = substr($dat, $p);
- $dat = substr($dat, 0, $p);
-
- foreach (explode("\012", $dat) as $h) {
- if ($h = trim($h)) {
- $r[trim(strtok($h, ":"))] = str_replace(EWIKI_DBFILES_NLR, "\n", trim(strtok("\000")));
- }
- }
- }
- return($r);
- }
-
-
- function WRITE($hash, $overwrite=0) {
-
- #-- which file
- $dbfile = $this->FN($hash["id"].".".$hash["version"]);
- if (!$overwrite && file_exists($dbfile)) {
- return(0);
- }
-
- #-- write
- if (EWIKI_DB_FAST_FILES) {
- $val = serialize($hash);
- if (($f = gzopen($dbfile, "wb".EWIKI_DBFILES_GZLEVEL))) {
- gzwrite($f, $val);
- gzclose($f);
- }
- return(1);
- }
- else {
- $headers = "";
- foreach ($hash as $hn=>$hv) if ($hn != "content") {
- $headers .= $hn . ": " . str_replace("\n", EWIKI_DBFILES_NLR, $hv) . "\015\012";
- }
- if ($f = fopen($dbfile, "wb")) {
- flock($f, LOCK_EX);
- fputs($f, $headers . "\015\012" . $hash["content"]);
- flock($f, LOCK_UN);
- fclose($f);
- return(1);
- }
- }
- }
-
-
- function HIT($id) {
- if (EWIKI_DB_FAST_FILES) {
- $dbfile = $this->FN("$id.1");
- if ($f = gzopen($dbfile, "rb")) {
- $r = unserialize(gzread($ff, 1<<21));
- gzclose($f);
- if ($r) {
- $r["hits"] += 1;
- if ($f = gzopen($dbfile, "wb".EWIKI_DBFILES_GZLEVEL)) {
- gzwrite($fp, serialize($r));
- gzclose($fp);
- } } } }
- }
-
-
- function FIND($list) {
- $existing = array_flip($this->ALLFILES());
- $r = array();
- foreach ($list as $id) {
- $dbfile = $this->FN($id, 0);
- $r[$id] = isset($existing[$dbfile]) ?1:0;
- if (EWIKI_DBFF_ACCURATE && $r[$id] && strpos($id, "://")) {
- $uu = $this->GET($id);
- if ($uu["meta"]) {
- $r[$id] = unserialize($uu["meta"]);
- $r[$id]["flags"] = $uu["flags"];
- } else {
- $r[$id] = $uu["flags"];
- }
- }
- }
- return($r);
- }
-
-
- function GETALL($fields, $mask=0, $filter=0) {
- $r = new ewiki_dbquery_result($fields);
- foreach ($this->ALLFILES() as $id) {
- $r->entries[] = $id;
- }
- return($r);
- }
-
-
- function SEARCH($field, $content, $ci="i", $regex=0, $mask=0, $filter=0) {
- $r = new ewiki_dbquery_result(array($field));
- $strsearch = $ci ? "stristr" : "strpos";
- foreach ($this->ALLFILES() as $id) {
- $row = $this->GET($id);
- if ($mask && ($filter == $row["flags"] & $mask)) {
- continue;
- }
- $match =
- !$regex && ($strsearch($row[$field], $content)!==false)
- || $regex && preg_match("\007$content\007$ci", $row[$field]);
- if ($match) {
- $r->add($row);
- }
- }
- return($r);
- }
-
-
- function DELETE($id, $version) {
- $fn = $this->FN("$id.$version");
- @unlink($fn);
- }
-
- function INIT() {
- if (!is_writeable(EWIKI_DBFILES_DIRECTORY) || !is_dir(EWIKI_DBFILES_DIRECTORY)) {
- mkdir(EWIKI_DBFILES_DIRECTORY)
- or die("db_flat_files: »database« directory '".EWIKI_DBFILES_DIRECTORY."' is not writeable!\n");
- }
- }
-
-
-
- #-- db plugin internal ----------------------------------------------
-
- function FN($id, $prepend_path=1) {
- $fn = EWIKI_DBFILES_ENCODE ? urlencode($id) : strtr($id, '/:', '\\:');
- if ($prepend_path) {
- $fn = EWIKI_DBFILES_DIRECTORY.DIRECTORY_SEPARATOR . $fn;
- }
- return($fn);
- }
-
-
- function ID($fn) {
- $id = EWIKI_DBFILES_ENCODE ? urldecode($fn) : strtr($fn, '\\:', '/:');
- return($id);
- }
-
-
- function LASTVER($id) {
- $find = $this->FN($id, 0);
- $find_n = strlen($find);
- $n = 0;
- if ($find_n) {
- $dh = opendir(EWIKI_DBFILES_DIRECTORY);
- while ($fn = readdir($dh)) {
- if ( (strpos($fn, $find) === 0) && //@FIXME: empty delimiter
- ($dot = strrpos($fn, ".")) && ($dot == $find_n) &&
- ($uu = substr($fn, ++$dot)) && ($uu > $n) )
- {
- $n = $uu;
- }
- } }
- return($n);
- }
-
-
- function ALLFILES() {
- $r = array();
- $dh = opendir(EWIKI_DBFILES_DIRECTORY);
- $n = 0;
- while ($fn = readdir($dh)) {
- if (is_file(EWIKI_DBFILES_DIRECTORY . "/" . $fn)) {
- $id = $this->ID($fn);
- if (($dot = strrpos($id, ".")) && (substr($id, $dot+1) >= 1)) {
- $file = substr($id, 0, $dot);
- $r[] = $file;
- }
- if ($n++ > 1000) {
- $n = 0;
- $r = array_unique($r);
- }
- }
- }
- closedir($dh);
- $r = array_unique($r);
- return($r);
- }
-
-
-} // end of class ewiki_database_files
-
-?>
\ No newline at end of file
projects / atutor.git / blobdiff