<?php
/**
* imageHandler.php
*
*
* imageHandler web (REST GET/PUT, json) service interface
*
* @package imageHandler
* @copyright 2015, Kjell-Inge Gustafsson kigkonsult, All rights reserved
* @author Kjell-Inge Gustafsson, kigkonsult <ical@kigkonsult.se>
* @link http://kigkonsult.se/imageHandler/index.php
* @license non-commercial use: Creative Commons
* Attribution-NonCommercial-NoDerivatives 4.0 International License
* (http://creativecommons.org/licenses/by-nc-nd/4.0/)
* commercial use :imageHandler141license / imageHandler14Xlicense
* @version 1.4
*
* json main key i / image
*
* REST GET/POST keys OR json (object) properties
* i / image : filename or url, required
* o / operation : 1/'download', 2/'stream' (default), 3/'save' (to disk)
* n / name : image output (display/save) name (opt)
* p : bool, TRUE jpg/gif output as png (default) , FALSE not
* TRUE also force png extension
* settings for the resizeable image, all opt, percent or pixels
* cx : crop start x coordinate, from left border (0%), to right border (100%), default 0
* cy : crop start y coordinate, from top border (0%), to bottom border (100%), default 0
* cw / cwidth : image crop, width
* ch / cheight : image crop, height
* w / width
* h / height
* mw / maxwidth
* mh / maxheight
*/
/* *******************************************************************
manage input
******************************************************************* */
$keys = array( 'image', 'i',
'operate', 'o', 'name', 'n', 'p',
'cx', 'cy', 'cwidth', 'cw', 'cheight', 'ch', 'width', 'w', 'height', 'h', 'maxwidth', 'mw', 'maxheight', 'mh'
);
$input = array();
foreach( $keys as $key ) {
if( array_key_exists( $key, $_REQUEST ))
$input[$key] = $_REQUEST[$key];
}
$_REQUEST = $keys = array();
if( FALSE === (bool) ( $imageStr = checkInputValue( 'image', 'i' )))
exit();
else
unset( $input['image'], $input['i'] );
/* *******************************************************************
imageHandler include and env./log setup and
******************************************************************* */
include './imageHandler.class.php';
ini_set( 'memory_limit', '2048M' ); // if managing larger images ??
// path to imageHandler directory
$basePath = dirname( __FILE__ ) . DIRECTORY_SEPARATOR;
// log filename or FALSE
$logFile = $basePath . 'log' . DIRECTORY_SEPARATOR . 'imageHandler.log';
$logprio = LOG_DEBUG; // default LOG_NOTICE
if( $logFile ) {
date_default_timezone_set( 'Europe/Stockholm' ); // required if using Log
include 'Log.php'; // here are PEAR log used but extended
class imageHandlerLog extends Log { public function _destruct() { $this->flush(); parent::_destruct(); }}
$log = imageHandlerLog::factory( 'file', $logFile, 'ih', array(), $logprio );
}
/* *******************************************************************
json check
******************************************************************* */
$result = json_decode( $imageStr, TRUE );
$jres = jsonTest( json_last_error());
if( empty( $input ) && is_array( $result )) { // json!!
if( TRUE !== $jres ) { // but json error...
if( $log ) $log->log( basename( __FILE__ )." $jres, input=".var_export( $imageStr, TRUE ), LOG_ERR );
exit();
}
$input = $result;
unset( $result );
$imageStr = checkInputValue( 'image', 'i' );
if( $log ) $log->log( basename( __FILE__ )." json input=".var_export( $input, TRUE ), LOG_DEBUG );
}
elseif( $log ) $log->log( basename( __FILE__ ).", input=$imageStr, ".var_export( $input, TRUE ), LOG_DEBUG );
/* *******************************************************************
imageHandler optional config
******************************************************************* */
if( $logFile ) {
imageHandler::$logger = $log;
imageHandler::$logprio = $logprio;
}
imageHandler::$defaultOperation = 1; // default 2
imageHandler::$outputpng = ( array_key_exists( 'p', $input ) && empty( $input['p'] )) ? FALSE : TRUE; // true default
// imageHandler::$imageLib = ??? // image storage path, will prefix image (filename) (note, suffixed by '/'!!)
// imageHandler::$filenamePrefix = ??? // prefix for created (temp/output) filenames
imageHandler::$cache = '/opt/work/imageHandler/cache/'; // default 'sys_get_temp_dir()'
/* *******************************************************************
operate !!
******************************************************************* */
$operation = checkInputValue( 'operate', 'o' );
if( ! is_numeric( $operation )) {
switch( $operation ) {
case 'download': $operation = 1; break;
case 'stream' : $operation = 2; break;
case 'save' : $operation = 3; break;
default : $operation = null; break;
}
}
imageHandler::Operate( $imageStr,
array( 'operation' => $operation,
'name' => checkInputValue( 'name', 'n' ),
'cx' => checkInputValue( 'cx' ),
'cy' => checkInputValue( 'cy' ),
'cwidth' => checkInputValue( 'cwidth', 'cw' ),
'cheight' => checkInputValue( 'cheight', 'ch' ),
'width' => checkInputValue( 'width', 'w' ),
'height' => checkInputValue( 'height', 'h' ),
'maxwidth' => checkInputValue( 'maxwidth', 'mw' ),
'maxheight' => checkInputValue( 'maxheight', 'mh' ),
)
);
/** *************************************************************************
* checkRequestValues
*
* check $input for keys, return first found and not empty (or null)
*
* @param string $key1
* @param string $key2
* @return mixed
*/
function checkInputValue( $key1, $key2=null ) {
global $input;
if( ! empty( $key1 ) && ( array_key_exists( $key1, $input ) && (( 0 == $input[$key1] ) || ! empty( $input[$key1] ))))
return $input[$key1];
if( ! empty( $key2 ) && ( array_key_exists( $key2, $input ) && (( 0 == $input[$key2] ) || ! empty( $input[$key2] ))))
return $input[$key2];
return null;
}
/**
* return (decoded) json last error
*
* @param mixed $jres
* @return mixed bool TRUE on success, string on error
* @static
*/
function jsonTest( $jres ) {
switch( $jres ) {
case JSON_ERROR_NONE : return TRUE; // No error has occurred
case JSON_ERROR_DEPTH : return 'The maximum stack depth has been exceeded';
case JSON_ERROR_STATE_MISMATCH : return 'Invalid or malformed JSON';
case JSON_ERROR_CTRL_CHAR : return 'Control character error, possibly incorrectly encoded';
case JSON_ERROR_SYNTAX : return 'Syntax error';
default:
if( version_compare( PHP_VERSION, '5.3.3', '>=' ) && (jres == JSON_ERROR_UTF8 ))
return 'Malformed UTF-8 characters, possibly incorrectly encoded';
if( version_compare( PHP_VERSION, '5.5', '>=' )) {
switch( $jres ) {
case JSON_ERROR_RECURSION : return 'One or more recursive references in the value to be encoded';
case JSON_ERROR_INF_OR_NAN : return 'One or more NAN or INF values in the value to be encoded';
case JSON_ERROR_UNSUPPORTED_TYPE : return 'A value of a type that cannot be encoded was given';
}
}
return 'Unknown json error code ('.str_replace( PHP_EOL, '', var_export( $jres, TRUE )).')';
}
}
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