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232252475f
Patch is mostly created by script in egroupware/doc/fix_depricated.php in separate commit. I do NOT advice to apply this patch to a production system (it's commited to trunk!), as the automatic modified regular expressions have a good change to break something ...
847 lines
16 KiB
PHP
Executable File
847 lines
16 KiB
PHP
Executable File
<?php
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/**
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*
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* Basic compiler for Savant2.
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*
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* This is a simple compiler provided as an example. It probably won't
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* work with streams, but it does limit the template syntax in a
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* relatively strict way. It's not perfect, but it's OK for many
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* purposes. Basically, the compiler converts specialized instances of
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* curly braces into PHP commands or Savant2 method calls. It will
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* probably mess up embedded JavaScript unless you change the prefix
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* and suffix to something else (e.g., '<!-- ' and ' -->', but then it
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* will mess up your HTML comments ;-).
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*
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* When in "restrict" mode, ise of PHP commands not in the whitelists
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* will cause the compiler to * fail. Use of various constructs and
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* superglobals, likewise.
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*
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* Use {$var} or {$this->var} to print a variable.
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*
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* Use {: function-list} to print the results of function calls.
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*
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* Use {['pluginName', 'arg1', $arg2, $this->arg3]} to call plugins.
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*
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* Use these for looping:
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* {foreach ():} ... {endforeach}
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* {for ():} ... {endfor}
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* {while ():} ... {endwhile}
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*
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* Use these for conditionals (normal PHP can go in the parens):
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* {if (...):}
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* {elseif (...):}
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* {else:}
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* {endif}
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* {switch (...):}
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* {case ...:}
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* {default:}
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* {endswitch}
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*
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* {break} and {continue} are supported as well.
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*
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* Use this to include a template:
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* {tpl 'template.tpl.php'}
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* {tpl $tplname}
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* {tpl $this->tplname}
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*
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* $Id$
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*
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* @author Paul M. Jones <pmjones@ciaweb.net>
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*
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* @package Savant2
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*
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* @license http://www.gnu.org/copyleft/lesser.html LGPL
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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*/
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require_once 'Savant2/Compiler.php';
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require_once 'Savant2/Error.php';
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require_once 'Savant2/PHPCodeAnalyzer.php';
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class Savant2_Compiler_basic extends Savant2_Compiler {
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/**
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*
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* The template directive prefix.
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*
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* @access public
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*
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* @var array
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*
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*/
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var $prefix = '{';
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/**
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*
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* The template directive suffix.
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*
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* @access public
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*
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* @var array
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*
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*/
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var $suffix = '}';
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/**
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*
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* The conversion regular expressions.
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*
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* @access public
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*
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* @var array
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*
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*/
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var $convert = array(
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// branching
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'(if\s*(.+):)' => '$1',
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'(elseif\s*(.+):)' => '$1',
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'(else\s*(.+):)' => '$1',
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'(endif)' => '$1',
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'(switch\s*(.+):)' => '$1',
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'(case\s*(.+):)' => '$1',
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'(default:)' => '$1',
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'(endswitch)' => '$1',
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'(break)' => '$1',
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// looping
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'(foreach\s*(.+):)' => '$1',
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'(endforeach)' => '$1',
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'(for\s*(.+):)' => '$1',
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'(endfor)' => '$1',
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'(while\s*(.+):)' => '$1',
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'(endwhile)' => '$1',
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'(continue)' => '$1',
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// simple variable printing
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'(\$(.+))' => 'print $1',
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// extended printing
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'(\:(.+))' => 'print ($2)',
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// comments
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'\*(.*)?\*' => '/**$1*/',
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// template includes
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'tpl (.*)' => 'include $this->findTemplate($1)',
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// plugins
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'\[\s*(.+)?\s*\]' => '$this->plugin($1)',
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);
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/**
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*
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* The list of allowed functions when in restricted mode.
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*
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* @access public
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*
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* @var array
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*
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*/
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var $allowedFunctions = array();
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/**
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*
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* The list of allowed static methods when in restricted mode.
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*
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* @access public
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*
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* @var array
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*
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*/
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var $allowedStatic = array();
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/**
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*
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* The directory where compiled templates are saved.
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*
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* @access public
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*
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* @var string
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*
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*/
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var $compileDir = null;
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/**
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*
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* Whether or not to force every template to be compiled every time.
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*
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* @access public
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*
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* @var bool
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*
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*/
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var $forceCompile = false;
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/**
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*
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* Whether or not to strict-check the compiled template.
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*
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* Strict-checks are off by default until all problems with
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* PhpCodeAnalyzer have been resolved.
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*
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* @access public
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*
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* @var bool
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*
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*/
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var $strict = false;
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/**
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*
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* Constructor.
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*
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*/
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function Savant2_Compiler_basic($conf = array())
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{
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parent::Savant2_Compiler($conf);
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$this->ca = new PHPCodeAnalyzer();
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$this->allowedFunctions = $this->allowedFunctions();
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$this->allowedStatic = $this->allowedStatic();
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}
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/**
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*
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* Has the source template changed since it was last compiled?
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*
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* @access public
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*
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* @var string $tpl The source template file.
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*
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*/
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function changed($tpl)
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{
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// the path for the compiled file
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$file = $this->getPath($tpl);
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// if the copmiled file does not exist, or if the mod-time of
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// the source is later than that of the existing compiled file,
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// then the source template file has changed.
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if (! file_exists($file) ||
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filemtime($tpl) > filemtime($file)) {
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return true;
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} else {
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return false;
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}
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}
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/**
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*
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* Saves the PHP compiled from template source.
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*
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* @access public
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*
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* @var string $tpl The source template file.
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*
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*/
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function saveCompiled($tpl, $php)
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{
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$fp = fopen($this->getPath($tpl), 'w');
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if (! $fp) {
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return false;
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} else {
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$result = fwrite($fp, $php);
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fclose($fp);
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return $result;
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}
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}
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/**
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*
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* Gets the path to the compiled PHP for a template source.
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*
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* @access public
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*
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* @var string $tpl The source template file.
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*
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*/
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function getPath($tpl)
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{
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$dir = $this->compileDir;
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if (substr($dir, -1) != DIRECTORY_SEPARATOR) {
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$dir .= DIRECTORY_SEPARATOR;
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}
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return $dir . 'Savant2_' . md5($tpl);
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}
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/**
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*
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* Compiles a template source into PHP code for Savant.
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*
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* @access public
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*
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* @var string $tpl The source template file.
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*
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*/
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function compile($tpl)
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{
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// create a end-tag so that text editors don't
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// stop colorizing text
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$end = '?' . '>';
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// recompile only if we are forcing compiled, or
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// if the template source has changed.
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if ($this->forceCompile || $this->changed($tpl)) {
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// get the template source text
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$php = file_get_contents($tpl);
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/**
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* @todo Do we really care about PHP tags? The code analyzer
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* will disallow any offending PHP regardless.
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*/
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// disallow PHP long tags
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$php = str_replace('<?php', '<?php', $php);
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// disallow PHP short tags (if turned on)
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if (ini_get('short_open_tag')) {
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$php = str_replace('<?', '<?', $php);
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$php = str_replace('<?=', '<?=', $php);
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}
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// disallow closing tags
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$php = str_replace($end, '?>', $php);
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// convert each template command
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foreach ($this->convert as $find => $replace) {
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// allow whitespace around the command
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$find = preg_quote($this->prefix) . '\s*' . $find .
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'\s*' . preg_quote($this->suffix);
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// actually do the find-and-replace
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$php = preg_replace(
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"/$find/U",
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"<?php $replace $end",
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$php
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);
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}
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// +++ DEBUG
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// $this->saveCompiled($tpl, $php);
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// --- DEBUG
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// are we doing strict checking?
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if ($this->strict) {
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// analyze the code for restriction violations.
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$report = $this->analyze($php);
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if (count($report) > 0) {
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// there were violations, report them as a generic
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// Savant error and return. Savant will wrap this
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// generic rror with another error that will report
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// properly to the customized error handler (if any).
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return new Savant2_Error(
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array(
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'code' => SAVANT2_ERROR_COMPILE_FAIL,
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'text' => $GLOBALS['_SAVANT2']['error'][SAVANT2_ERROR_COMPILE_FAIL],
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'info' => $report
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)
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);
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}
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}
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// otherwise, save the compiled template
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$this->saveCompiled($tpl, $php);
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}
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// return the path to the compiled PHP script
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return $this->getPath($tpl);
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}
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/**
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*
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* Analyze a compiled template for restriction violations.
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*
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* @access public
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*
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* @var string $php The compiled PHP code from a template source.
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*
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* @return array An array of restriction violations; if empty, then
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* there were no violations discovered by analysis.
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*
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*/
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function analyze(&$php)
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{
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// analyze the compiled code
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$ca =& $this->ca;
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$ca->source =& $php;
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$ca->analyze();
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// array of captured restriction violations
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$report = array();
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// -------------------------------------------------------------
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//
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// go through the list of called functions and make sure each
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// one is allowed via the whitelist. if not, record each non-
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// allowed function. this also restricts variable-functions
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// such as $var().
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//
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foreach ($ca->calledFunctions as $func => $lines) {
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if (! in_array($func, $this->allowedFunctions)) {
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$report[$func] = $lines;
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}
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}
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// -------------------------------------------------------------
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//
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// disallow use of various constructs (include is allowed, we
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// need it for {tpl}).
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//
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$tmp = array(
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'eval',
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'global',
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'include_once',
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'require',
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'require_once',
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'parent',
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'self'
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);
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foreach ($tmp as $val) {
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if (isset($ca->calledConstructs[$val])) {
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$report[$val] = $ca->calledConstructs[$val];
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}
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}
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// -------------------------------------------------------------
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//
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// disallow instantiation of new classes
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//
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foreach ($ca->classesInstantiated as $key => $val) {
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$report['new ' . $key] = $val;
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}
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// -------------------------------------------------------------
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//
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// disallow access to the various superglobals
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// so that templates cannot manipulate them.
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//
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$tmp = array(
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'$_COOKIE',
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'$_ENV',
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'$_FILES',
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'$_GET',
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'$_POST',
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'$_REQUEST',
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'$_SERVER',
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'$_SESSION',
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'$GLOBALS',
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'$HTTP_COOKIE_VARS',
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'$HTTP_ENV_VARS',
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'$HTTP_GET_VARS',
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'$HTTP_POST_FILES',
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'$HTTP_POST_VARS',
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'$HTTP_SERVER_VARS',
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'$HTTP_SESSION_VARS'
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);
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foreach ($ca->usedVariables as $var => $lines) {
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if (in_array(strtoupper($var), $tmp)) {
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$report[$var] = $lines;
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}
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}
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// -------------------------------------------------------------
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//
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// allow only certain $this methods
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//
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$tmp = array('plugin', 'splugin', 'findTemplate');
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if (isset($ca->calledMethods['$this'])) {
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foreach ($ca->calledMethods['$this'] as $method => $lines) {
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if (! in_array($method, $tmp)) {
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$report['$this->' . $method] = $lines;
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}
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}
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}
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// -------------------------------------------------------------
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//
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// disallow private and variable-variable $this properties
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//
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if (isset($ca->usedMemberVariables['$this'])) {
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foreach ($ca->usedMemberVariables['$this'] as $prop => $lines) {
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$char = substr($prop, 0, 1);
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if ($char == '_' || $char == '$') {
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$report['$this->' . $prop] = $lines;
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}
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}
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}
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// -------------------------------------------------------------
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//
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// allow only certain static method calls
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//
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foreach ($ca->calledStaticMethods as $class => $methods) {
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foreach ($methods as $method => $lines) {
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if (! array_key_exists($class, $this->allowedStatic)) {
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// the class itself is not allowed
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$report["$class::$method"] = $lines;
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} elseif (! in_array('*', $this->allowedStatic[$class]) &&
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! in_array($method, $this->allowedStatic[$class])){
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// the specific method is not allowed,
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// and there is no wildcard for the class methods.
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$report["$class::$method"] = $lines;
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}
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}
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}
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// -------------------------------------------------------------
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//
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// only allow includes via $this->findTemplate(*)
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//
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foreach ($ca->filesIncluded as $text => $lines) {
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// in each include statment, look for $this->findTemplate.
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preg_match(
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'/(.*)?\$this->findTemplate\((.*)?\)(.*)/i',
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$text,
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$matches
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);
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if (! empty($matches[1]) || ! empty($matches[3]) ||
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empty($matches[2])) {
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// there is something before or after the findTemplate call,
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// or it's a direct include (which is not allowed)
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$report["include $text"] = $lines;
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}
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}
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// -------------------------------------------------------------
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//
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// do not allow the use of "$this" by itself;
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// it must be always be followed by "->" or another
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// valid variable-name character (a-z, 0-9, or _).
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//
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$regex = '/(.*)?\$this(?!(\-\>)|([a-z0-9_]))(.*)?/i';
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preg_match_all($regex, $php, $matches, PREG_SET_ORDER);
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foreach ($matches as $val) {
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$report['\'$this\' without \'->\''][] = $val[0];
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}
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/** @todo disallow standalone variable-variables, $$var */
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/** @todo disallow vars from static classes? class::$var */
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// -------------------------------------------------------------
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//
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// done!
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//
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// +++ DEBUG
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//echo "<pre>";
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//print_r($ca);
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//echo "</pre>";
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// --- DEBUG
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return $report;
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}
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/**
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*
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* A list of allowed static method calls for templates.
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*
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* The format is ...
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*
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* array(
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* 'Class1' => array('method1', 'method2'),
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* 'Class2' => array('methodA', 'methodB'),
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* 'Class3' => '*'
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* );
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*
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* If you want to allow all methods from the static class to be allowed,
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* use a '*' in the method name list.
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*
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*/
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function allowedStatic()
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{
|
|
return array();
|
|
}
|
|
|
|
|
|
/**
|
|
*
|
|
* A list of allowed functions for templates.
|
|
*
|
|
*/
|
|
|
|
function allowedFunctions()
|
|
{
|
|
return array(
|
|
|
|
// arrays
|
|
'array_count_values',
|
|
'array_key_exists',
|
|
'array_keys',
|
|
'array_sum',
|
|
'array_values',
|
|
'compact',
|
|
'count',
|
|
'current',
|
|
'each',
|
|
'end',
|
|
'extract',
|
|
'in_array',
|
|
'key',
|
|
'list',
|
|
'next',
|
|
'pos',
|
|
'prev',
|
|
'reset',
|
|
'sizeof',
|
|
|
|
// calendar
|
|
'cal_days_in_month',
|
|
'cal_from_jd',
|
|
'cal_to_jd',
|
|
'easter_date',
|
|
'easter_days',
|
|
'FrenchToJD',
|
|
'GregorianToJD',
|
|
'JDDayOfWeek',
|
|
'JDMonthName',
|
|
'JDToFrench',
|
|
'JDToGregorian',
|
|
'jdtojewish',
|
|
'JDToJulian',
|
|
'jdtounix',
|
|
'JewishToJD',
|
|
'JulianToJD',
|
|
'unixtojd',
|
|
|
|
// date
|
|
'checkdate',
|
|
'date_sunrise',
|
|
'date_sunset',
|
|
'date',
|
|
'getdate',
|
|
'gettimeofday',
|
|
'gmdate',
|
|
'gmmktime',
|
|
'gmstrftime',
|
|
'idate',
|
|
'localtime',
|
|
'microtime',
|
|
'mktime',
|
|
'strftime',
|
|
'strptime',
|
|
'strtotime',
|
|
'time',
|
|
|
|
// gettext
|
|
'_',
|
|
'gettext',
|
|
'ngettext',
|
|
|
|
// math
|
|
'abs',
|
|
'acos',
|
|
'acosh',
|
|
'asin',
|
|
'asinh',
|
|
'atan2',
|
|
'atan',
|
|
'atanh',
|
|
'base_convert',
|
|
'bindec',
|
|
'ceil',
|
|
'cos',
|
|
'cosh',
|
|
'decbin',
|
|
'dechex',
|
|
'decoct',
|
|
'deg2rad',
|
|
'exp',
|
|
'expm1',
|
|
'floor',
|
|
'fmod',
|
|
'getrandmax',
|
|
'hexdec',
|
|
'hypot',
|
|
'is_finite',
|
|
'is_infinite',
|
|
'is_nan',
|
|
'lcg_value',
|
|
'log10',
|
|
'log1p',
|
|
'log',
|
|
'max',
|
|
'min',
|
|
'mt_getrandmax',
|
|
'mt_rand',
|
|
'mt_srand',
|
|
'octdec',
|
|
'pi',
|
|
'pow',
|
|
'rad2deg',
|
|
'rand',
|
|
'round',
|
|
'sin',
|
|
'sinh',
|
|
'sqrt',
|
|
'srand',
|
|
'tan',
|
|
'tanh',
|
|
|
|
// strings
|
|
'chop',
|
|
'count_chars',
|
|
'echo',
|
|
'explode',
|
|
'hebrev',
|
|
'hebrevc',
|
|
'html_entity_decode',
|
|
'htmlentities',
|
|
'htmlspecialchars',
|
|
'implode',
|
|
'join',
|
|
'localeconv',
|
|
'ltrim',
|
|
'money_format',
|
|
'nl_langinfo',
|
|
'nl2br',
|
|
'number_format',
|
|
'ord',
|
|
'print',
|
|
'printf',
|
|
'quoted_printable_decode',
|
|
'rtrim',
|
|
'sprintf',
|
|
'sscanf',
|
|
'str_pad',
|
|
'str_repeat',
|
|
'str_replace',
|
|
'str_rot13',
|
|
'str_shuffle',
|
|
'str_word_count',
|
|
'strcasecmp',
|
|
'strchr',
|
|
'strcmp',
|
|
'strcoll',
|
|
'strcspn',
|
|
'strip_tags',
|
|
'stripcslashes',
|
|
'stripos',
|
|
'stripslashes',
|
|
'stristr',
|
|
'strlen',
|
|
'strnatcasecmp',
|
|
'strnatcmp',
|
|
'strncasecmp',
|
|
'strncmp',
|
|
'strpbrk',
|
|
'strpos',
|
|
'strrchr',
|
|
'strrev',
|
|
'strripos',
|
|
'strrpos',
|
|
'strspn',
|
|
'strstr',
|
|
'strtok',
|
|
'strtolower',
|
|
'strtoupper',
|
|
'strtr',
|
|
'substr_compare',
|
|
'substr_count',
|
|
'substr_replace',
|
|
'substr',
|
|
'trim',
|
|
'ucfirst',
|
|
'ucwords',
|
|
'wordwrap',
|
|
|
|
// url
|
|
'base64_decode',
|
|
'base64_encode',
|
|
'rawurldecode',
|
|
'rawurlencode',
|
|
'urldecode',
|
|
'urlencode',
|
|
|
|
// variables
|
|
'empty',
|
|
'is_array',
|
|
'is_bool',
|
|
'is_double',
|
|
'is_float',
|
|
'is_int',
|
|
'is_integer',
|
|
'is_long',
|
|
'is_null',
|
|
'is_numeric',
|
|
'is_object',
|
|
'is_real',
|
|
'is_resource',
|
|
'is_scalar',
|
|
'is_string',
|
|
'isset',
|
|
'print_r',
|
|
'unset',
|
|
'var_dump',
|
|
);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
?>
|