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<?php |
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/** |
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* |
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* |
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* Created on Sep 19, 2006 |
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* |
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* Copyright © 2006 Yuri Astrakhan "<Firstname><Lastname>@gmail.com" |
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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 General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (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, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* http://www.gnu.org/copyleft/gpl.html |
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* |
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* @file |
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*/ |
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/** |
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* API JSON output formatter |
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* @ingroup API |
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*/ |
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class ApiFormatJson extends ApiFormatBase { |
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private $isRaw; |
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public function __construct( ApiMain $main, $format ) { |
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parent::__construct( $main, $format ); |
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$this->isRaw = ( $format === 'rawfm' ); |
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if ( $this->getMain()->getCheck( 'callback' ) ) { |
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# T94015: jQuery appends a useless '_' parameter in jsonp mode. |
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# Mark the parameter as used in that case to avoid a warning that's |
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# outside the control of the end user. |
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# (and do it here because ApiMain::reportUnusedParams() gets called |
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# before our ::execute()) |
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$this->getMain()->markParamsUsed( '_' ); |
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} |
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} |
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public function getMimeType() { |
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$params = $this->extractRequestParams(); |
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// callback: |
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if ( isset( $params['callback'] ) ) { |
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return 'text/javascript'; |
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} |
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return 'application/json'; |
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} |
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public function execute() { |
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$params = $this->extractRequestParams(); |
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$opt = 0; |
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if ( $this->isRaw ) { |
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$opt |= FormatJson::ALL_OK; |
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$transform = []; |
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} else { |
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switch ( $params['formatversion'] ) { |
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View Code Duplication |
case 1: |
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$opt |= $params['utf8'] ? FormatJson::ALL_OK : FormatJson::XMLMETA_OK; |
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$transform = [ |
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'BC' => [], |
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'Types' => [ 'AssocAsObject' => true ], |
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'Strip' => 'all', |
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]; |
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break; |
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case 2: |
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View Code Duplication |
case 'latest': |
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$opt |= $params['ascii'] ? FormatJson::XMLMETA_OK : FormatJson::ALL_OK; |
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$transform = [ |
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'Types' => [ 'AssocAsObject' => true ], |
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'Strip' => 'all', |
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]; |
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break; |
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default: |
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$this->dieUsage( __METHOD__ . |
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': Unknown value for \'formatversion\'', 'unknownformatversion' ); |
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} |
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} |
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$data = $this->getResult()->getResultData( null, $transform ); |
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$json = FormatJson::encode( $data, $this->getIsHtml(), $opt ); |
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// Bug 66776: wfMangleFlashPolicy() is needed to avoid a nasty bug in |
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// Flash, but what it does isn't friendly for the API, so we need to |
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// work around it. |
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if ( preg_match( '/\<\s*cross-domain-policy(?=\s|\>)/i', $json ) ) { |
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$json = preg_replace( |
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'/\<(\s*cross-domain-policy(?=\s|\>))/i', '\\u003C$1', $json |
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); |
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} |
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if ( isset( $params['callback'] ) ) { |
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$callback = preg_replace( "/[^][.\\'\\\"_A-Za-z0-9]/", '', $params['callback'] ); |
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# Prepend a comment to try to avoid attacks against content |
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# sniffers, such as bug 68187. |
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$this->printText( "/**/$callback($json)" ); |
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} else { |
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$this->printText( $json ); |
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} |
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} |
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public function getAllowedParams() { |
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if ( $this->isRaw ) { |
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return parent::getAllowedParams(); |
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} |
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$ret = parent::getAllowedParams() + [ |
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'callback' => [ |
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ApiBase::PARAM_HELP_MSG => 'apihelp-json-param-callback', |
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], |
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'utf8' => [ |
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ApiBase::PARAM_DFLT => false, |
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ApiBase::PARAM_HELP_MSG => 'apihelp-json-param-utf8', |
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], |
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'ascii' => [ |
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ApiBase::PARAM_DFLT => false, |
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ApiBase::PARAM_HELP_MSG => 'apihelp-json-param-ascii', |
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], |
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'formatversion' => [ |
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ApiBase::PARAM_TYPE => [ 1, 2, 'latest' ], |
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ApiBase::PARAM_DFLT => 1, |
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ApiBase::PARAM_HELP_MSG => 'apihelp-json-param-formatversion', |
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], |
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]; |
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return $ret; |
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} |
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} |
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If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: