%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
namespace CpChart;
/**
* Cache - speed up the rendering by caching up the pictures
*
* Version : 2.1.4
* Made by : Jean-Damien POGOLOTTI
* Last Update : 19/01/2014
*
* This file can be distributed under the license you can find at :
*
* http://www.pchart.net/license
*
* You can find the whole class documentation on the pChart web site.
*/
class Cache
{
/**
* @var string
*/
public $CacheFolder;
/**
* @var string
*/
public $CacheIndex;
/**
* @var string
*/
public $CacheDB;
/**
* @param array $Settings
*/
public function __construct(array $Settings = [])
{
$CacheFolder = isset($Settings["CacheFolder"]) ? $Settings["CacheFolder"] : __DIR__ . "/../cache";
$CacheIndex = isset($Settings["CacheIndex"]) ? $Settings["CacheIndex"] : "index.db";
$CacheDB = isset($Settings["CacheDB"]) ? $Settings["CacheDB"] : "cache.db";
$this->CacheFolder = $CacheFolder;
$this->CacheIndex = $CacheIndex;
$this->CacheDB = $CacheDB;
if (!file_exists($this->CacheFolder . "/" . $this->CacheIndex)) {
touch($this->CacheFolder . "/" . $this->CacheIndex);
}
if (!file_exists($this->CacheFolder . "/" . $this->CacheDB)) {
touch($this->CacheFolder . "/" . $this->CacheDB);
}
}
/**
* Flush the cache contents
*/
public function flush()
{
if (file_exists($this->CacheFolder . "/" . $this->CacheIndex)) {
unlink($this->CacheFolder . "/" . $this->CacheIndex);
touch($this->CacheFolder . "/" . $this->CacheIndex);
}
if (file_exists($this->CacheFolder . "/" . $this->CacheDB)) {
unlink($this->CacheFolder . "/" . $this->CacheDB);
touch($this->CacheFolder . "/" . $this->CacheDB);
}
}
/**
* Return the MD5 of the data array to clearly identify the chart
*
* @param Data $Data
* @param string $Marker
* @return string
*/
public function getHash(Data $Data, $Marker = "")
{
return md5($Marker . serialize($Data->Data));
}
/**
* Write the generated picture to the cache
*
* @param string $ID
* @param Image $pChartObject
*/
public function writeToCache($ID, Image $pChartObject)
{
/* Compute the paths */
$TemporaryFile = tempnam($this->CacheFolder, "tmp_");
$Database = $this->CacheFolder . "/" . $this->CacheDB;
$Index = $this->CacheFolder . "/" . $this->CacheIndex;
/* Flush the picture to a temporary file */
imagepng($pChartObject->Picture, $TemporaryFile);
/* Retrieve the files size */
$PictureSize = filesize($TemporaryFile);
$DBSize = filesize($Database);
/* Save the index */
$Handle = fopen($Index, "a");
fwrite($Handle, $ID . "," . $DBSize . "," . $PictureSize . "," . time() . ",0\r\n");
fclose($Handle);
/* Get the picture raw contents */
$Handle = fopen($TemporaryFile, "r");
$Raw = fread($Handle, $PictureSize);
fclose($Handle);
/* Save the picture in the solid database file */
$Handle = fopen($Database, "a");
fwrite($Handle, $Raw);
fclose($Handle);
/* Remove temporary file */
unlink($TemporaryFile);
}
/**
* Remove object older than the specified TS
* @param int $Expiry
*/
public function removeOlderThan($Expiry)
{
$this->dbRemoval(["Expiry" => $Expiry]);
}
/**
* Remove an object from the cache
* @param string $ID
*/
public function remove($ID)
{
$this->dbRemoval(["Name" => $ID]);
}
/**
* Remove with specified criterias.
*
* @param array $Settings
* @return int
*/
public function dbRemoval(array $Settings)
{
$ID = isset($Settings["Name"]) ? $Settings["Name"] : null;
$Expiry = isset($Settings["Expiry"]) ? $Settings["Expiry"] : -(24 * 60 * 60);
$TS = time() - $Expiry;
/* Compute the paths */
$Database = $this->CacheFolder . "/" . $this->CacheDB;
$Index = $this->CacheFolder . "/" . $this->CacheIndex;
$DatabaseTemp = $this->CacheFolder . "/" . $this->CacheDB . ".tmp";
$IndexTemp = $this->CacheFolder . "/" . $this->CacheIndex . ".tmp";
/* Single file removal */
if ($ID != null) {
/* Retrieve object informations */
$Object = $this->isInCache($ID, true);
/* If it's not in the cache DB, go away */
if (!$Object) {
return(0);
}
}
/* Create the temporary files */
if (!file_exists($DatabaseTemp)) {
touch($DatabaseTemp);
}
if (!file_exists($IndexTemp)) {
touch($IndexTemp);
}
/* Open the file handles */
$IndexHandle = @fopen($Index, "r");
$IndexTempHandle = @fopen($IndexTemp, "w");
$DBHandle = @fopen($Database, "r");
$DBTempHandle = @fopen($DatabaseTemp, "w");
/* Remove the selected ID from the database */
while (!feof($IndexHandle)) {
$Entry = fgets($IndexHandle, 4096);
$Entry = str_replace("\r", "", $Entry);
$Entry = str_replace("\n", "", $Entry);
$Settings = preg_split("/,/", $Entry);
if ($Entry != "") {
$PicID = $Settings[0];
$DBPos = $Settings[1];
$PicSize = $Settings[2];
$GeneratedTS = $Settings[3];
$Hits = $Settings[4];
if ($Settings[0] != $ID && $GeneratedTS > $TS) {
$CurrentPos = ftell($DBTempHandle);
fwrite(
$IndexTempHandle,
sprintf(
"%s,%s,%s,%s,%s\r\n",
$PicID,
$CurrentPos,
$PicSize,
$GeneratedTS,
$Hits
)
);
fseek($DBHandle, $DBPos);
$Picture = fread($DBHandle, $PicSize);
fwrite($DBTempHandle, $Picture);
}
}
}
/* Close the handles */
fclose($IndexHandle);
fclose($IndexTempHandle);
fclose($DBHandle);
fclose($DBTempHandle);
/* Remove the prod files */
unlink($Database);
unlink($Index);
/* Swap the temp & prod DB */
rename($DatabaseTemp, $Database);
rename($IndexTemp, $Index);
}
/**
* Is the file in cache?
*
* @param string $ID
* @param boolean $Verbose
* @param boolean $UpdateHitsCount
* @return boolean
*/
public function isInCache($ID, $Verbose = false, $UpdateHitsCount = false)
{
/* Compute the paths */
$Index = $this->CacheFolder . "/" . $this->CacheIndex;
/* Search the picture in the index file */
$Handle = @fopen($Index, "r");
while (!feof($Handle)) {
$IndexPos = ftell($Handle);
$Entry = fgets($Handle, 4096);
if ($Entry != "") {
$Settings = preg_split("/,/", $Entry);
$PicID = $Settings[0];
if ($PicID == $ID) {
fclose($Handle);
$DBPos = $Settings[1];
$PicSize = $Settings[2];
$GeneratedTS = $Settings[3];
$Hits = intval($Settings[4]);
if ($UpdateHitsCount) {
$Hits++;
if (strlen($Hits) < 7) {
$Hits = $Hits . str_repeat(" ", 7 - strlen($Hits));
}
$Handle = @fopen($Index, "r+");
fseek($Handle, $IndexPos);
fwrite(
$Handle,
sprintf(
"%s,%s,%s,%s,%s\r\n",
$PicID,
$DBPos,
$PicSize,
$GeneratedTS,
$Hits
)
);
fclose($Handle);
}
if ($Verbose) {
return [
"DBPos" => $DBPos,
"PicSize" => $PicSize,
"GeneratedTS" => $GeneratedTS,
"Hits" => $Hits
];
} else {
return true;
}
}
}
}
fclose($Handle);
/* Picture isn't in the cache */
return false;
}
/**
* Automatic output method based on the calling interface
* @param string $ID
* @param string $Destination
*/
public function autoOutput($ID, $Destination = "output.png")
{
if (php_sapi_name() == "cli") {
$this->saveFromCache($ID, $Destination);
} else {
$this->strokeFromCache($ID);
}
}
/**
* Show image from cache
* @param string $ID
* @return boolean
*/
public function strokeFromCache($ID)
{
/* Get the raw picture from the cache */
$Picture = $this->getFromCache($ID);
/* Do we have a hit? */
if ($Picture == null) {
return false;
}
header('Content-type: image/png');
echo $Picture;
return true;
}
/**
* Save file from cache.
* @param string $ID
* @param string $Destination
* @return boolean
*/
public function saveFromCache($ID, $Destination)
{
/* Get the raw picture from the cache */
$Picture = $this->getFromCache($ID);
/* Do we have a hit? */
if ($Picture == null) {
return false;
}
/* Flush the picture to a file */
$Handle = fopen($Destination, "w");
fwrite($Handle, $Picture);
fclose($Handle);
/* All went fine */
return true;
}
/**
* Get file from cache
* @param string $ID
* @return string|null
*/
public function getFromCache($ID)
{
/* Compute the path */
$Database = $this->CacheFolder . "/" . $this->CacheDB;
/* Lookup for the picture in the cache */
$CacheInfo = $this->isInCache($ID, true, true);
/* Not in the cache */
if (!$CacheInfo) {
return null;
}
/* Get the database extended information */
$DBPos = $CacheInfo["DBPos"];
$PicSize = $CacheInfo["PicSize"];
/* Extract the picture from the solid cache file */
$Handle = @fopen($Database, "r");
fseek($Handle, $DBPos);
$Picture = fread($Handle, $PicSize);
fclose($Handle);
/* Return back the raw picture data */
return $Picture;
}
}
Zerion Mini Shell 1.0