mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-11-15 02:23:58 +00:00
572 lines
17 KiB
PHP
572 lines
17 KiB
PHP
<?php
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/**
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* Parsoid API wrapper.
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*
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* @file
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* @ingroup Extensions
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* @copyright 2011-2014 VisualEditor Team and others; see AUTHORS.txt
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* @license The MIT License (MIT); see LICENSE.txt
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*/
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class ApiVisualEditor extends ApiBase {
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/**
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* Parsoid HTTP proxy configuration for MWHttpRequest
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*/
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protected function getProxyConf() {
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global $wgVisualEditorParsoidHTTPProxy;
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if ( $wgVisualEditorParsoidHTTPProxy ) {
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return array( 'proxy' => $wgVisualEditorParsoidHTTPProxy );
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} else {
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return array( 'noProxy' => true );
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}
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}
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protected function requestParsoid( $method, $title, $params ) {
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global $wgVisualEditorParsoidURL,
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$wgVisualEditorParsoidPrefix,
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$wgVisualEditorParsoidTimeout,
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$wgVisualEditorParsoidForwardCookies;
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$url = $wgVisualEditorParsoidURL . '/' .
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$wgVisualEditorParsoidPrefix . '/' .
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urlencode( $title->getPrefixedDBkey() );
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$data = array_merge(
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$this->getProxyConf(),
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array(
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'method' => $method,
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'timeout' => $wgVisualEditorParsoidTimeout,
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)
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);
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if ( $method === 'POST' ) {
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$data['postData'] = $params;
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} else {
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$url = wfAppendQuery( $url, $params );
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}
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$req = MWHttpRequest::factory( $url, $data );
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// Forward cookies, but only if configured to do so and if there are read restrictions
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if ( $wgVisualEditorParsoidForwardCookies && !User::isEveryoneAllowed( 'read' ) ) {
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$req->setHeader( 'Cookie', $this->getRequest()->getHeader( 'Cookie' ) );
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}
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$status = $req->execute();
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if ( $status->isOK() ) {
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// Pass thru performance data from Parsoid to the client, unless the response was
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// served directly from Varnish, in which case discard the value of the XPP header
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// and use it to declare the cache hit instead.
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$xCache = $req->getResponseHeader( 'X-Cache' );
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if ( is_string( $xCache ) && strpos( $xCache, 'hit' ) !== false ) {
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$xpp = 'cached-response=true';
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} else {
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$xpp = $req->getResponseHeader( 'X-Parsoid-Performance' );
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}
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if ( $xpp !== null ) {
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$resp = $this->getRequest()->response();
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$resp->header( 'X-Parsoid-Performance: ' . $xpp );
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}
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} elseif ( $status->isGood() ) {
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$this->dieUsage( $req->getContent(), 'parsoidserver-http-' . $req->getStatus() );
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} elseif ( $errors = $status->getErrorsByType( 'error' ) ) {
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$error = $errors[0];
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$code = $error['message'];
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if ( count( $error['params'] ) ) {
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$message = $error['params'][0];
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} else {
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$message = 'MWHttpRequest error';
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}
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$this->dieUsage( $message, 'parsoidserver-' . $code );
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}
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// TODO pass through X-Parsoid-Performance header, merge with getHTML above
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return $req->getContent();
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}
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protected function getHTML( $title, $parserParams ) {
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global $wgVisualEditorParsoidURL,
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$wgVisualEditorParsoidPrefix,
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$wgVisualEditorParsoidTimeout,
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$wgVisualEditorParsoidForwardCookies;
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$restoring = false;
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if ( $title->exists() ) {
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$latestRevision = Revision::newFromTitle( $title );
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if ( $latestRevision === null ) {
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return false;
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}
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$revision = null;
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if ( !isset( $parserParams['oldid'] ) || $parserParams['oldid'] === 0 ) {
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$parserParams['oldid'] = $latestRevision->getId();
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$revision = $latestRevision;
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} else {
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$revision = Revision::newFromId( $parserParams['oldid'] );
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if ( $revision === null ) {
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return false;
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}
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}
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$restoring = $revision && !$revision->isCurrent();
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$oldid = $parserParams['oldid'];
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$content = $this->requestParsoid( 'GET', $title, $parserParams );
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if ( $content === false ) {
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return false;
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}
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$timestamp = $latestRevision->getTimestamp();
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} else {
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$content = '';
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$timestamp = wfTimestampNow();
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$oldid = 0;
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}
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return array(
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'result' => array(
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'content' => $content,
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'basetimestamp' => $timestamp,
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'starttimestamp' => wfTimestampNow(),
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'oldid' => $oldid,
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),
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'restoring' => $restoring,
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);
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}
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protected function storeInSerializationCache( $title, $oldid, $html ) {
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global $wgMemc, $wgVisualEditorSerializationCacheTimeout;
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$content = $this->postHTML( $title, $html, array( 'oldid' => $oldid ) );
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if ( $content === false ) {
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return false;
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}
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$hash = md5( $content );
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$key = wfMemcKey( 'visualeditor', 'serialization', $hash );
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$wgMemc->set( $key, $content, $wgVisualEditorSerializationCacheTimeout );
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return $hash;
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}
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protected function trySerializationCache( $hash ) {
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global $wgMemc;
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$key = wfMemcKey( 'visualeditor', 'serialization', $hash );
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return $wgMemc->get( $key );
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}
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protected function postHTML( $title, $html, $parserParams ) {
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if ( $parserParams['oldid'] === 0 ) {
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$parserParams['oldid'] = '';
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}
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return $this->requestParsoid( 'POST', $title,
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array(
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'content' => $html,
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'oldid' => $parserParams['oldid'],
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)
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);
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}
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protected function parseWikitextFragment( $title, $wikitext ) {
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return $this->requestParsoid( 'POST', $title,
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array(
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'wt' => $wikitext,
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'body' => 1,
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)
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);
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}
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protected function parseWikitext( $title ) {
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$apiParams = array(
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'action' => 'parse',
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'page' => $title->getPrefixedDBkey(),
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'prop' => 'text|revid|categorieshtml',
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);
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$api = new ApiMain(
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new DerivativeRequest(
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$this->getRequest(),
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$apiParams,
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false // was posted?
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),
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true // enable write?
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);
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$api->execute();
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$result = $api->getResultData();
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$content = isset( $result['parse']['text']['*'] ) ? $result['parse']['text']['*'] : false;
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$categorieshtml = isset( $result['parse']['categorieshtml']['*'] ) ?
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$result['parse']['categorieshtml']['*'] : false;
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$links = isset( $result['parse']['links'] ) ? $result['parse']['links'] : array();
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$revision = Revision::newFromId( $result['parse']['revid'] );
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$timestamp = $revision ? $revision->getTimestamp() : wfTimestampNow();
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if ( $content === false || ( strlen( $content ) && $revision === null ) ) {
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return false;
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}
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return array(
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'content' => $content,
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'categorieshtml' => $categorieshtml,
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'basetimestamp' => $timestamp,
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'starttimestamp' => wfTimestampNow()
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);
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}
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protected function diffWikitext( $title, $wikitext ) {
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$apiParams = array(
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'action' => 'query',
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'prop' => 'revisions',
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'titles' => $title->getPrefixedDBkey(),
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'rvdifftotext' => $wikitext
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);
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$api = new ApiMain(
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new DerivativeRequest(
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$this->getRequest(),
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$apiParams,
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false // was posted?
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),
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false // enable write?
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);
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$api->execute();
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$result = $api->getResultData();
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if ( !isset( $result['query']['pages'][$title->getArticleID()]['revisions'][0]['diff']['*'] ) ) {
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return array( 'result' => 'fail' );
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}
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$diffRows = $result['query']['pages'][$title->getArticleID()]['revisions'][0]['diff']['*'];
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if ( $diffRows !== '' ) {
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$context = new DerivativeContext( $this->getContext() );
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$context->setTitle( $title );
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$engine = new DifferenceEngine( $context );
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return array(
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'result' => 'success',
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'diff' => $engine->addHeader(
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$diffRows,
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wfMessage( 'currentrev' )->parse(),
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wfMessage( 'yourtext' )->parse()
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)
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);
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} else {
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return array( 'result' => 'nochanges' );
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}
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}
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protected function getLangLinks( $title ) {
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$apiParams = array(
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'action' => 'query',
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'prop' => 'langlinks',
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'lllimit' => 500,
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'titles' => $title->getPrefixedDBkey(),
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'indexpageids' => 1,
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);
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$api = new ApiMain(
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new DerivativeRequest(
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$this->getRequest(),
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$apiParams,
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false // was posted?
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),
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true // enable write?
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);
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$api->execute();
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$result = $api->getResultData();
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if ( !isset( $result['query']['pages'][$title->getArticleID()]['langlinks'] ) ) {
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return false;
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}
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$langlinks = $result['query']['pages'][$title->getArticleID()]['langlinks'];
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$langnames = Language::fetchLanguageNames();
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foreach ( $langlinks as $i => $lang ) {
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$langlinks[$i]['langname'] = $langnames[$langlinks[$i]['lang']];
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}
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return $langlinks;
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}
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public function execute() {
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global $wgVisualEditorNamespaces;
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$user = $this->getUser();
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$params = $this->extractRequestParams();
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$page = Title::newFromText( $params['page'] );
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if ( !$page ) {
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$this->dieUsageMsg( 'invalidtitle', $params['page'] );
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}
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if ( !in_array( $page->getNamespace(), $wgVisualEditorNamespaces ) ) {
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$this->dieUsage( "VisualEditor is not enabled in namespace " .
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$page->getNamespace(), 'novenamespace' );
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}
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$parserParams = array();
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if ( isset( $params['oldid'] ) ) {
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$parserParams['oldid'] = $params['oldid'];
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}
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switch ( $params['paction'] ) {
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case 'parse':
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$parsed = $this->getHTML( $page, $parserParams );
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// Dirty hack to provide the correct context for edit notices
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global $wgTitle; // FIXME NOOOOOOOOES
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$wgTitle = $page;
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RequestContext::getMain()->setTitle( $page );
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$notices = $page->getEditNotices();
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if ( $user->isAnon() ) {
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$notices[] = $this->msg( 'anoneditwarning' )->parseAsBlock();
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}
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if ( $parsed && $parsed['restoring'] ) {
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$notices[] = $this->msg( 'editingold' )->parseAsBlock();
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}
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// Creating new page
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if ( !$page->exists() ) {
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$notices[] = $this->msg(
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$user->isLoggedIn() ? 'newarticletext' : 'newarticletextanon',
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Skin::makeInternalOrExternalUrl(
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$this->msg( 'helppage' )->inContentLanguage()->text()
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)
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)->parseAsBlock();
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// Page protected from creation
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if ( $page->getRestrictions( 'create' ) ) {
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$notices[] = $this->msg( 'titleprotectedwarning' )->parseAsBlock();
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}
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}
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// Page protected from editing
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if ( $page->getNamespace() != NS_MEDIAWIKI && $page->isProtected( 'edit' ) ) {
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# Is the title semi-protected?
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if ( $page->isSemiProtected() ) {
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$noticeMsg = 'semiprotectedpagewarning';
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} else {
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# Then it must be protected based on static groups (regular)
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$noticeMsg = 'protectedpagewarning';
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}
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$notices[] = $this->msg( $noticeMsg )->parseAsBlock() .
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$this->getLastLogEntry( $page, 'protect' );
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}
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// Show notice when editing user / user talk page of a user that doesn't exist
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// or who is blocked
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// HACK of course this code is partly duplicated from EditPage.php :(
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if ( $page->getNamespace() == NS_USER || $page->getNamespace() == NS_USER_TALK ) {
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$parts = explode( '/', $page->getText(), 2 );
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$targetUsername = $parts[0];
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$targetUser = User::newFromName( $targetUsername, false /* allow IP users*/ );
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if (
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!( $targetUser && $targetUser->isLoggedIn() ) &&
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!User::isIP( $targetUsername )
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) { // User does not exist
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$notices[] = "<div class=\"mw-userpage-userdoesnotexist error\">\n" .
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$this->msg( 'userpage-userdoesnotexist', wfEscapeWikiText( $targetUsername ) ) .
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"\n</div>";
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} elseif ( $targetUser->isBlocked() ) { // Show log extract if the user is currently blocked
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$notices[] = $this->msg(
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'blocked-notice-logextract',
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$targetUser->getName() // Support GENDER in notice
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)->parseAsBlock() . $this->getLastLogEntry( $targetUser->getUserPage(), 'block' );
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}
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}
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if ( $user->isBlockedFrom( $page ) && $user->getBlock()->prevents( 'edit' ) !== false ) {
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$notices[] = call_user_func_array(
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array( $this, 'msg' ),
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$user->getBlock()->getPermissionsError( $this->getContext() )
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)->parseAsBlock();
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}
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// HACK: Build a fake EditPage so we can get checkboxes from it
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$article = new Article( $page ); // Deliberately omitting ,0 so oldid comes from request
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$ep = new EditPage( $article );
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$req = $this->getRequest();
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$req->setVal( 'format', 'text/x-wiki' );
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$ep->importFormData( $req ); // By reference for some reason (bug 52466)
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$tabindex = 0;
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$states = array( 'minor' => false, 'watch' => false );
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$checkboxes = $ep->getCheckboxes( $tabindex, $states );
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// HACK: Find out which red links are on the page
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// We do the lookup for the current version. This might not be entirely complete
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// if we're loading an oldid, but it'll probably be close enough, and LinkCache
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// will automatically request any additional data it needs.
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$links = array();
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$wikipage = WikiPage::factory( $page );
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$popts = $wikipage->makeParserOptions( 'canonical' );
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$cached = ParserCache::singleton()->get( $article, $popts, true );
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if ( $cached ) {
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foreach ( $cached->getLinks() as $ns => $dbks ) {
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foreach ( $dbks as $dbk => $id ) {
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$links[ Title::makeTitle( $ns, $dbk )->getPrefixedText() ] = array(
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'missing' => $id == 0
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);
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}
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}
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}
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// On parser cache miss, just don't bother populating red link data
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if ( $parsed === false ) {
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$this->dieUsage( 'Error contacting the Parsoid server', 'parsoidserver' );
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} else {
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$result = array_merge(
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array(
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'result' => 'success',
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'notices' => $notices,
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'checkboxes' => $checkboxes,
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'links' => $links,
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),
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$parsed['result']
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);
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}
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break;
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case 'parsefragment':
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$content = $this->parseWikitextFragment( $page, $params['wikitext'] );
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if ( $content === false ) {
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$this->dieUsage( 'Error contacting the Parsoid server', 'parsoidserver' );
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} else {
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$result = array(
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'result' => 'success',
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'content' => $content
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);
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}
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break;
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case 'serialize':
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if ( $params['cachekey'] !== null ) {
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$content = $this->trySerializationCache( $params['cachekey'] );
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if ( !is_string( $content ) ) {
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$this->dieUsage( 'No cached serialization found with that key', 'badcachekey' );
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}
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} else {
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if ( $params['html'] === null ) {
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$this->dieUsageMsg( 'missingparam', 'html' );
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}
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$html = $params['html'];
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$content = $this->postHTML( $page, $html, $parserParams );
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if ( $content === false ) {
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$this->dieUsage( 'Error contacting the Parsoid server', 'parsoidserver' );
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}
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}
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$result = array( 'result' => 'success', 'content' => $content );
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break;
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case 'diff':
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if ( $params['cachekey'] !== null ) {
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$wikitext = $this->trySerializationCache( $params['cachekey'] );
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if ( !is_string( $wikitext ) ) {
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$this->dieUsage( 'No cached serialization found with that key', 'badcachekey' );
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}
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} else {
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$wikitext = $this->postHTML( $page, $params['html'], $parserParams );
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if ( $wikitext === false ) {
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$this->dieUsage( 'Error contacting the Parsoid server', 'parsoidserver' );
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}
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}
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$diff = $this->diffWikitext( $page, $wikitext );
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if ( $diff['result'] === 'fail' ) {
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$this->dieUsage( 'Diff failed', 'difffailed' );
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}
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$result = $diff;
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break;
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case 'serializeforcache':
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$key = $this->storeInSerializationCache( $page, $parserParams['oldid'], $params['html'] );
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$result = array( 'result' => 'success', 'cachekey' => $key );
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break;
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case 'getlanglinks':
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$langlinks = $this->getLangLinks( $page );
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if ( $langlinks === false ) {
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$this->dieUsage( 'Error querying MediaWiki API', 'parsoidserver' );
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} else {
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$result = array( 'result' => 'success', 'langlinks' => $langlinks );
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}
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break;
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}
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$this->getResult()->addValue( null, $this->getModuleName(), $result );
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}
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/**
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* Gets the relevant HTML for the latest log entry on a given title, including a full log link.
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*
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* @param $title Title
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* @param $types array|string
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* @returns string
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*/
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private function getLastLogEntry( $title, $types = '' ) {
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$lp = new LogPager(
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new LogEventsList( $this->getContext() ),
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$types,
|
|
'',
|
|
$title->getPrefixedDbKey()
|
|
);
|
|
$lp->mLimit = 1;
|
|
|
|
return $lp->getBody() . Linker::link(
|
|
SpecialPage::getTitleFor( 'Log' ),
|
|
$this->msg( 'log-fulllog' )->escaped(),
|
|
array(),
|
|
array(
|
|
'page' => $title->getPrefixedDBkey(),
|
|
'type' => is_string( $types ) ? $types : null
|
|
)
|
|
);
|
|
}
|
|
|
|
public function getAllowedParams() {
|
|
return array(
|
|
'page' => array(
|
|
ApiBase::PARAM_REQUIRED => true,
|
|
),
|
|
'format' => array(
|
|
ApiBase::PARAM_DFLT => 'json',
|
|
ApiBase::PARAM_TYPE => array( 'json', 'jsonfm' ),
|
|
),
|
|
'paction' => array(
|
|
ApiBase::PARAM_REQUIRED => true,
|
|
ApiBase::PARAM_TYPE => array(
|
|
'parse',
|
|
'parsefragment',
|
|
'serialize',
|
|
'serializeforcache',
|
|
'diff',
|
|
'getlanglinks',
|
|
),
|
|
),
|
|
'wikitext' => null,
|
|
'basetimestamp' => null,
|
|
'starttimestamp' => null,
|
|
'oldid' => null,
|
|
'html' => null,
|
|
'cachekey' => null,
|
|
);
|
|
}
|
|
|
|
public function needsToken() {
|
|
return false;
|
|
}
|
|
|
|
public function mustBePosted() {
|
|
return false;
|
|
}
|
|
|
|
public function isWriteMode() {
|
|
return true;
|
|
}
|
|
|
|
public function getParamDescription() {
|
|
return array(
|
|
'page' => 'The page to perform actions on.',
|
|
'paction' => 'Action to perform',
|
|
'oldid' => 'The revision number to use (defaults to latest version).',
|
|
'html' => 'HTML to send to parsoid in exchange for wikitext',
|
|
'basetimestamp' => 'When saving, set this to the timestamp of the revision that was'
|
|
. ' edited. Used to detect edit conflicts.',
|
|
'starttimestamp' => 'When saving, set this to the timestamp of when the page was loaded.'
|
|
. ' Used to detect edit conflicts.',
|
|
'cachekey' => 'For serialize or diff, use the result of a previous serializeforcache'
|
|
. ' request with this key. Overrides html.',
|
|
);
|
|
}
|
|
|
|
public function getDescription() {
|
|
return 'Returns HTML5 for a page from the parsoid service.';
|
|
}
|
|
}
|