MediaWiki REL1_35
ApiQueryExternalLinks.php
Go to the documentation of this file.
1<?php
29
30 public function __construct( ApiQuery $query, $moduleName ) {
31 parent::__construct( $query, $moduleName, 'el' );
32 }
33
34 public function execute() {
35 if ( $this->getPageSet()->getGoodTitleCount() == 0 ) {
36 return;
37 }
38
39 $params = $this->extractRequestParams();
40 $db = $this->getDB();
41
42 $query = $params['query'];
43 $protocol = ApiQueryExtLinksUsage::getProtocolPrefix( $params['protocol'] );
44
45 $this->addFields( [
46 'el_from',
47 'el_to'
48 ] );
49
50 $this->addTables( 'externallinks' );
51 $this->addWhereFld( 'el_from', array_keys( $this->getPageSet()->getGoodTitles() ) );
52
53 $orderBy = [];
54
55 // Don't order by el_from if it's constant in the WHERE clause
56 if ( count( $this->getPageSet()->getGoodTitles() ) != 1 ) {
57 $orderBy[] = 'el_from';
58 }
59
60 if ( $query !== null && $query !== '' ) {
61 if ( $protocol === null ) {
62 $protocol = 'http://';
63 }
64
65 // Normalize query to match the normalization applied for the externallinks table
66 $query = Parser::normalizeLinkUrl( $protocol . $query );
67
68 $conds = LinkFilter::getQueryConditions( $query, [
69 'protocol' => '',
70 'oneWildcard' => true,
71 'db' => $db
72 ] );
73 if ( !$conds ) {
74 $this->dieWithError( 'apierror-badquery' );
75 }
76 $this->addWhere( $conds );
77 if ( !isset( $conds['el_index_60'] ) ) {
78 $orderBy[] = 'el_index_60';
79 }
80 } else {
81 $orderBy[] = 'el_index_60';
82
83 if ( $protocol !== null ) {
84 $this->addWhere( 'el_index_60' . $db->buildLike( "$protocol", $db->anyString() ) );
85 } else {
86 // We're querying all protocols, filter out duplicate protocol-relative links
87 $this->addWhere( $db->makeList( [
88 'el_to NOT' . $db->buildLike( '//', $db->anyString() ),
89 'el_index_60 ' . $db->buildLike( 'http://', $db->anyString() ),
90 ], LIST_OR ) );
91 }
92 }
93
94 $orderBy[] = 'el_id';
95 $this->addOption( 'ORDER BY', $orderBy );
96 $this->addFields( $orderBy ); // Make sure
97
98 $this->addOption( 'LIMIT', $params['limit'] + 1 );
99
100 if ( $params['continue'] !== null ) {
101 $cont = explode( '|', $params['continue'] );
102 $this->dieContinueUsageIf( count( $cont ) !== count( $orderBy ) );
103 $i = count( $cont ) - 1;
104 $cond = $orderBy[$i] . ' >= ' . $db->addQuotes( rawurldecode( $cont[$i] ) );
105 while ( $i-- > 0 ) {
106 $field = $orderBy[$i];
107 $v = $db->addQuotes( rawurldecode( $cont[$i] ) );
108 $cond = "($field > $v OR ($field = $v AND $cond))";
109 }
110 $this->addWhere( $cond );
111 }
112
113 $res = $this->select( __METHOD__ );
114
115 $count = 0;
116 foreach ( $res as $row ) {
117 if ( ++$count > $params['limit'] ) {
118 // We've reached the one extra which shows that
119 // there are additional pages to be had. Stop here...
120 $this->setContinue( $orderBy, $row );
121 break;
122 }
123 $entry = [];
124 $to = $row->el_to;
125 // expand protocol-relative urls
126 if ( $params['expandurl'] ) {
127 $to = wfExpandUrl( $to, PROTO_CANONICAL );
128 }
129 ApiResult::setContentValue( $entry, 'url', $to );
130 $fit = $this->addPageSubItem( $row->el_from, $entry );
131 if ( !$fit ) {
132 $this->setContinue( $orderBy, $row );
133 break;
134 }
135 }
136 }
137
138 private function setContinue( $orderBy, $row ) {
139 $fields = [];
140 foreach ( $orderBy as $field ) {
141 $fields[] = strtr( $row->$field, [ '%' => '%25', '|' => '%7C' ] );
142 }
143 $this->setContinueEnumParameter( 'continue', implode( '|', $fields ) );
144 }
145
146 public function getCacheMode( $params ) {
147 return 'public';
148 }
149
150 public function getAllowedParams() {
151 return [
152 'limit' => [
154 ApiBase::PARAM_TYPE => 'limit',
158 ],
159 'continue' => [
160 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
161 ],
162 'protocol' => [
165 ],
166 'query' => null,
167 'expandurl' => false,
168 ];
169 }
170
171 protected function getExamplesMessages() {
172 return [
173 'action=query&prop=extlinks&titles=Main%20Page'
174 => 'apihelp-query+extlinks-example-simple',
175 ];
176 }
177
178 public function getHelpUrls() {
179 return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Extlinks';
180 }
181}
wfExpandUrl( $url, $defaultProto=PROTO_CURRENT)
Expand a potentially local URL to a fully-qualified URL.
dieWithError( $msg, $code=null, $data=null, $httpCode=0)
Abort execution with an error.
Definition ApiBase.php:1437
const PARAM_MAX2
Definition ApiBase.php:86
const PARAM_MAX
Definition ApiBase.php:82
dieContinueUsageIf( $condition)
Die with the 'badcontinue' error.
Definition ApiBase.php:1617
const PARAM_TYPE
Definition ApiBase.php:78
const PARAM_DFLT
Definition ApiBase.php:70
const PARAM_MIN
Definition ApiBase.php:90
const LIMIT_BIG1
Fast query, standard limit.
Definition ApiBase.php:220
extractRequestParams( $options=[])
Using getAllowedParams(), this function makes an array of the values provided by the user,...
Definition ApiBase.php:772
const PARAM_HELP_MSG
(string|array|Message) Specify an alternative i18n documentation message for this parameter.
Definition ApiBase.php:162
const LIMIT_BIG2
Fast query, apihighlimits limit.
Definition ApiBase.php:222
This is a base class for all Query modules.
setContinueEnumParameter( $paramName, $paramValue)
Set a query-continue value.
addFields( $value)
Add a set of fields to select to the internal array.
addPageSubItem( $pageId, $item, $elemname=null)
Same as addPageSubItems(), but one element of $data at a time.
addOption( $name, $value=null)
Add an option such as LIMIT or USE INDEX.
addTables( $tables, $alias=null)
Add a set of tables to the internal array.
getDB()
Get the Query database connection (read-only) Stable to override.
select( $method, $extraQuery=[], array &$hookData=null)
Execute a SELECT query based on the values in the internal arrays.
addWhereFld( $field, $value)
Equivalent to addWhere( [ $field => $value ] )
getPageSet()
Get the PageSet object to work on Stable to override.
addWhere( $value)
Add a set of WHERE clauses to the internal array.
static getProtocolPrefix( $protocol)
This is the main query class.
Definition ApiQuery.php:37
static getQueryConditions( $filterEntry, array $options=[])
Return query conditions which will match the specified string.
const PROTO_CANONICAL
Definition Defines.php:213
const LIST_OR
Definition Defines.php:52