MediaWiki 1.7.1 wiederhergestellt

1 files changed, 491 insertions, 0 deletions

diff --git a/includes/WebRequest.php b/includes/WebRequest.php
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+<?php
+/**
+ * Deal with importing all those nasssty globals and things
+ * @package MediaWiki
+ */
+
+# Copyright (C) 2003 Brion Vibber <brion@pobox.com>
+# http://www.mediawiki.org/
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+# http://www.gnu.org/copyleft/gpl.html
+
+/**
+ * The WebRequest class encapsulates getting at data passed in the
+ * URL or via a POSTed form, handling remove of "magic quotes" slashes,
+ * stripping illegal input characters and normalizing Unicode sequences.
+ *
+ * Usually this is used via a global singleton, $wgRequest. You should
+ * not create a second WebRequest object; make a FauxRequest object if
+ * you want to pass arbitrary data to some function in place of the web
+ * input.
+ *
+ * @package MediaWiki
+ */
+class WebRequest {
+	function WebRequest() {
+		$this->checkMagicQuotes();
+		global $wgUsePathInfo;
+		if( isset( $_SERVER['PATH_INFO'] ) && ($_SERVER['PATH_INFO'] != '') && $wgUsePathInfo ) {
+			# Stuff it!
+			$_GET['title'] = $_REQUEST['title'] =
+				substr( $_SERVER['PATH_INFO'], 1 );
+		}
+	}
+
+	/**
+	 * Recursively strips slashes from the given array;
+	 * used for undoing the evil that is magic_quotes_gpc.
+	 * @param array &$arr will be modified
+	 * @return array the original array
+	 * @private
+	 */
+	function &fix_magic_quotes( &$arr ) {
+		foreach( $arr as $key => $val ) {
+			if( is_array( $val ) ) {
+				$this->fix_magic_quotes( $arr[$key] );
+			} else {
+				$arr[$key] = stripslashes( $val );
+			}
+		}
+		return $arr;
+	}
+
+	/**
+	 * If magic_quotes_gpc option is on, run the global arrays
+	 * through fix_magic_quotes to strip out the stupid slashes.
+	 * WARNING: This should only be done once! Running a second
+	 * time could damage the values.
+	 * @private
+	 */
+	function checkMagicQuotes() {
+		if ( get_magic_quotes_gpc() ) {
+			$this->fix_magic_quotes( $_COOKIE );
+			$this->fix_magic_quotes( $_ENV );
+			$this->fix_magic_quotes( $_GET );
+			$this->fix_magic_quotes( $_POST );
+			$this->fix_magic_quotes( $_REQUEST );
+			$this->fix_magic_quotes( $_SERVER );
+		}
+	}
+
+	/**
+	 * Recursively normalizes UTF-8 strings in the given array.
+	 * @param array $data string or array
+	 * @return cleaned-up version of the given
+	 * @private
+	 */
+	function normalizeUnicode( $data ) {
+		if( is_array( $data ) ) {
+			foreach( $data as $key => $val ) {
+				$data[$key] = $this->normalizeUnicode( $val );
+			}
+		} else {
+			$data = UtfNormal::cleanUp( $data );
+		}
+		return $data;
+	}
+
+	/**
+	 * Fetch a value from the given array or return $default if it's not set.
+	 *
+	 * @param array $arr
+	 * @param string $name
+	 * @param mixed $default
+	 * @return mixed
+	 * @private
+	 */
+	function getGPCVal( $arr, $name, $default ) {
+		if( isset( $arr[$name] ) ) {
+			global $wgContLang;
+			$data = $arr[$name];
+			if( isset( $_GET[$name] ) && !is_array( $data ) ) {
+				# Check for alternate/legacy character encoding.
+				if( isset( $wgContLang ) ) {
+					$data = $wgContLang->checkTitleEncoding( $data );
+				}
+			}
+			require_once( 'normal/UtfNormal.php' );
+			$data = $this->normalizeUnicode( $data );
+			return $data;
+		} else {
+			return $default;
+		}
+	}
+
+	/**
+	 * Fetch a scalar from the input or return $default if it's not set.
+	 * Returns a string. Arrays are discarded.
+	 *
+	 * @param string $name
+	 * @param string $default optional default (or NULL)
+	 * @return string
+	 */
+	function getVal( $name, $default = NULL ) {
+		$val = $this->getGPCVal( $_REQUEST, $name, $default );
+		if( is_array( $val ) ) {
+			$val = $default;
+		}
+		if( is_null( $val ) ) {
+			return null;
+		} else {
+			return (string)$val;
+		}
+	}
+
+	/**
+	 * Fetch an array from the input or return $default if it's not set.
+	 * If source was scalar, will return an array with a single element.
+	 * If no source and no default, returns NULL.
+	 *
+	 * @param string $name
+	 * @param array $default optional default (or NULL)
+	 * @return array
+	 */
+	function getArray( $name, $default = NULL ) {
+		$val = $this->getGPCVal( $_REQUEST, $name, $default );
+		if( is_null( $val ) ) {
+			return null;
+		} else {
+			return (array)$val;
+		}
+	}
+	
+	/**
+	 * Fetch an array of integers, or return $default if it's not set.
+	 * If source was scalar, will return an array with a single element.
+	 * If no source and no default, returns NULL.
+	 * If an array is returned, contents are guaranteed to be integers.
+	 *
+	 * @param string $name
+	 * @param array $default option default (or NULL)
+	 * @return array of ints
+	 */
+	function getIntArray( $name, $default = NULL ) {
+		$val = $this->getArray( $name, $default );
+		if( is_array( $val ) ) {
+			$val = array_map( 'intval', $val );
+		}
+		return $val;
+	}
+
+	/**
+	 * Fetch an integer value from the input or return $default if not set.
+	 * Guaranteed to return an integer; non-numeric input will typically
+	 * return 0.
+	 * @param string $name
+	 * @param int $default
+	 * @return int
+	 */
+	function getInt( $name, $default = 0 ) {
+		return intval( $this->getVal( $name, $default ) );
+	}
+
+	/**
+	 * Fetch an integer value from the input or return null if empty.
+	 * Guaranteed to return an integer or null; non-numeric input will
+	 * typically return null.
+	 * @param string $name
+	 * @return int
+	 */
+	function getIntOrNull( $name ) {
+		$val = $this->getVal( $name );
+		return is_numeric( $val )
+			? intval( $val )
+			: null;
+	}
+
+	/**
+	 * Fetch a boolean value from the input or return $default if not set.
+	 * Guaranteed to return true or false, with normal PHP semantics for
+	 * boolean interpretation of strings.
+	 * @param string $name
+	 * @param bool $default
+	 * @return bool
+	 */
+	function getBool( $name, $default = false ) {
+		return $this->getVal( $name, $default ) ? true : false;
+	}
+
+	/**
+	 * Return true if the named value is set in the input, whatever that
+	 * value is (even "0"). Return false if the named value is not set.
+	 * Example use is checking for the presence of check boxes in forms.
+	 * @param string $name
+	 * @return bool
+	 */
+	function getCheck( $name ) {
+		# Checkboxes and buttons are only present when clicked
+		# Presence connotes truth, abscense false
+		$val = $this->getVal( $name, NULL );
+		return isset( $val );
+	}
+
+	/**
+	 * Fetch a text string from the given array or return $default if it's not
+	 * set. \r is stripped from the text, and with some language modules there
+	 * is an input transliteration applied. This should generally be used for
+	 * form <textarea> and <input> fields.
+	 *
+	 * @param string $name
+	 * @param string $default optional
+	 * @return string
+	 */
+	function getText( $name, $default = '' ) {
+		global $wgContLang;
+		$val = $this->getVal( $name, $default );
+		return str_replace( "\r\n", "\n",
+			$wgContLang->recodeInput( $val ) );
+	}
+
+	/**
+	 * Extracts the given named values into an array.
+	 * If no arguments are given, returns all input values.
+	 * No transformation is performed on the values.
+	 */
+	function getValues() {
+		$names = func_get_args();
+		if ( count( $names ) == 0 ) {
+			$names = array_keys( $_REQUEST );
+		}
+
+		$retVal = array();
+		foreach ( $names as $name ) {
+			$value = $this->getVal( $name );
+			if ( !is_null( $value ) ) {
+				$retVal[$name] = $value;
+			}
+		}
+		return $retVal;
+	}
+
+	/**
+	 * Returns true if the present request was reached by a POST operation,
+	 * false otherwise (GET, HEAD, or command-line).
+	 *
+	 * Note that values retrieved by the object may come from the
+	 * GET URL etc even on a POST request.
+	 *
+	 * @return bool
+	 */
+	function wasPosted() {
+		return $_SERVER['REQUEST_METHOD'] == 'POST';
+	}
+
+	/**
+	 * Returns true if there is a session cookie set.
+	 * This does not necessarily mean that the user is logged in!
+	 *
+	 * @return bool
+	 */
+	function checkSessionCookie() {
+		return isset( $_COOKIE[ini_get('session.name')] );
+	}
+
+	/**
+	 * Return the path portion of the request URI.
+	 * @return string
+	 */
+	function getRequestURL() {
+		$base = $_SERVER['REQUEST_URI'];
+		if( $base{0} == '/' ) {
+			return $base;
+		} else {
+			// We may get paths with a host prepended; strip it.
+			return preg_replace( '!^[^:]+://[^/]+/!', '/', $base );
+		}
+	}
+
+	/**
+	 * Return the request URI with the canonical service and hostname.
+	 * @return string
+	 */
+	function getFullRequestURL() {
+		global $wgServer;
+		return $wgServer . $this->getRequestURL();
+	}
+
+	/**
+	 * Take an arbitrary query and rewrite the present URL to include it
+	 * @param $query String: query string fragment; do not include initial '?'
+	 * @return string
+	 */
+	function appendQuery( $query ) {
+		global $wgTitle;
+		$basequery = '';
+		foreach( $_GET as $var => $val ) {
+			if ( $var == 'title' )
+				continue;
+			if ( is_array( $val ) )
+				/* This will happen given a request like
+				 * http://en.wikipedia.org/w/index.php?title[]=Special:Userlogin&returnto[]=Main_Page
+				 */
+				continue;
+			$basequery .= '&' . urlencode( $var ) . '=' . urlencode( $val );
+		}
+		$basequery .= '&' . $query;
+
+		# Trim the extra &
+		$basequery = substr( $basequery, 1 );
+		return $wgTitle->getLocalURL( $basequery );
+	}
+
+	/**
+	 * HTML-safe version of appendQuery().
+	 * @param $query String: query string fragment; do not include initial '?'
+	 * @return string
+	 */
+	function escapeAppendQuery( $query ) {
+		return htmlspecialchars( $this->appendQuery( $query ) );
+	}
+
+	/**
+	 * Check for limit and offset parameters on the input, and return sensible
+	 * defaults if not given. The limit must be positive and is capped at 5000.
+	 * Offset must be positive but is not capped.
+	 *
+	 * @param $deflimit Integer: limit to use if no input and the user hasn't set the option.
+	 * @param $optionname String: to specify an option other than rclimit to pull from.
+	 * @return array first element is limit, second is offset
+	 */
+	function getLimitOffset( $deflimit = 50, $optionname = 'rclimit' ) {
+		global $wgUser;
+
+		$limit = $this->getInt( 'limit', 0 );
+		if( $limit < 0 ) $limit = 0;
+		if( ( $limit == 0 ) && ( $optionname != '' ) ) {
+			$limit = (int)$wgUser->getOption( $optionname );
+		}
+		if( $limit <= 0 ) $limit = $deflimit;
+		if( $limit > 5000 ) $limit = 5000; # We have *some* limits...
+
+		$offset = $this->getInt( 'offset', 0 );
+		if( $offset < 0 ) $offset = 0;
+
+		return array( $limit, $offset );
+	}
+
+	/**
+	 * Return the path to the temporary file where PHP has stored the upload.
+	 * @param $key String:
+	 * @return string or NULL if no such file.
+	 */
+	function getFileTempname( $key ) {
+		if( !isset( $_FILES[$key] ) ) {
+			return NULL;
+		}
+		return $_FILES[$key]['tmp_name'];
+	}
+
+	/**
+	 * Return the size of the upload, or 0.
+	 * @param $key String:
+	 * @return integer
+	 */
+	function getFileSize( $key ) {
+		if( !isset( $_FILES[$key] ) ) {
+			return 0;
+		}
+		return $_FILES[$key]['size'];
+	}
+
+	/**
+	 * Return the upload error or 0
+	 * @param $key String:
+	 * @return integer
+	 */
+	function getUploadError( $key ) {
+		if( !isset( $_FILES[$key] ) || !isset( $_FILES[$key]['error'] ) ) {
+			return 0/*UPLOAD_ERR_OK*/;
+		}
+		return $_FILES[$key]['error'];
+	}
+
+	/**
+	 * Return the original filename of the uploaded file, as reported by
+	 * the submitting user agent. HTML-style character entities are
+	 * interpreted and normalized to Unicode normalization form C, in part
+	 * to deal with weird input from Safari with non-ASCII filenames.
+	 *
+	 * Other than this the name is not verified for being a safe filename.
+	 *
+	 * @param $key String: 
+	 * @return string or NULL if no such file.
+	 */
+	function getFileName( $key ) {
+		if( !isset( $_FILES[$key] ) ) {
+			return NULL;
+		}
+		$name = $_FILES[$key]['name'];
+
+		# Safari sends filenames in HTML-encoded Unicode form D...
+		# Horrid and evil! Let's try to make some kind of sense of it.
+		$name = Sanitizer::decodeCharReferences( $name );
+		$name = UtfNormal::cleanUp( $name );
+		wfDebug( "WebRequest::getFileName() '" . $_FILES[$key]['name'] . "' normalized to '$name'\n" );
+		return $name;
+	}
+}
+
+/**
+ * WebRequest clone which takes values from a provided array.
+ *
+ * @package MediaWiki
+ */
+class FauxRequest extends WebRequest {
+	var $data = null;
+	var $wasPosted = false;
+
+	function FauxRequest( $data, $wasPosted = false ) {
+		if( is_array( $data ) ) {
+			$this->data = $data;
+		} else {
+			throw new MWException( "FauxRequest() got bogus data" );
+		}
+		$this->wasPosted = $wasPosted;
+	}
+
+	function getVal( $name, $default = NULL ) {
+		return $this->getGPCVal( $this->data, $name, $default );
+	}
+
+	function getText( $name, $default = '' ) {
+		# Override; don't recode since we're using internal data
+		return $this->getVal( $name, $default );
+	}
+
+	function getValues() {
+		return $this->data;
+	}
+
+	function wasPosted() {
+		return $this->wasPosted;
+	}
+
+	function checkSessionCookie() {
+		return false;
+	}
+
+	function getRequestURL() {
+		throw new MWException( 'FauxRequest::getRequestURL() not implemented' );
+	}
+
+	function appendQuery( $query ) {
+		throw new MWException( 'FauxRequest::appendQuery() not implemented' );
+	}
+
+}
+
+?>