mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-11-13 17:48:17 +00:00
477 lines
14 KiB
PHP
477 lines
14 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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protected function getHTML( $title, $parserParams ) {
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global $wgVisualEditorParsoidURL, $wgVisualEditorParsoidPrefix,
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$wgVisualEditorParsoidTimeout, $wgVisualEditorParsoidForwardCookies;
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$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 = $parserParams['oldid'];
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$req = MWHttpRequest::factory( wfAppendQuery(
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$wgVisualEditorParsoidURL . '/' . $wgVisualEditorParsoidPrefix .
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'/' . urlencode( $title->getPrefixedDBkey() ),
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$parserParams
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),
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array(
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'method' => 'GET',
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'timeout' => $wgVisualEditorParsoidTimeout
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)
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);
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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 ( $status->isOK() ) {
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$content = $req->getContent();
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// Pass thru performance data from Parsoid to the client, unless the response was
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// served directly from Varnish, in which case discard the value of the XPP header
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// and use it to declare the cache hit instead.
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$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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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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global $wgVisualEditorParsoidURL, $wgVisualEditorParsoidPrefix,
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$wgVisualEditorParsoidTimeout, $wgVisualEditorParsoidForwardCookies;
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if ( $parserParams['oldid'] === 0 ) {
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$parserParams['oldid'] = '';
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}
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$req = MWHttpRequest::factory(
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$wgVisualEditorParsoidURL . '/' . $wgVisualEditorParsoidPrefix .
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'/' . urlencode( $title->getPrefixedDBkey() ),
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array(
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'method' => 'POST',
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'postData' => array(
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'content' => $html,
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'oldid' => $parserParams['oldid']
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),
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'timeout' => $wgVisualEditorParsoidTimeout
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)
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);
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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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// TODO proper error handling, merge with getHTML above
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return false;
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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 parseWikitext( $title ) {
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$apiParams = array(
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'action' => 'parse',
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'page' => $title->getPrefixedDBkey()
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);
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$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']['*'] ) ? $result['parse']['text']['*'] : false;
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$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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'basetimestamp' => $timestamp,
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'starttimestamp' => wfTimestampNow()
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);
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}
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protected function parseWikitextFragment( $wikitext, $title = null ) {
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$apiParams = array(
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'action' => 'parse',
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'title' => $title,
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'prop' => 'text',
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'disablepp' => true,
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'text' => $wikitext
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);
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$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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true // enable write?
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);
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$api->execute();
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$result = $api->getResultData();
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return isset( $result['parse']['text']['*'] ) ? $result['parse']['text']['*'] : false;
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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, $wgVisualEditorEditNotices;
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$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 = $page;
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$notices = $page->getEditNotices();
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if ( $user->isAnon() ) {
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$wgVisualEditorEditNotices[] = 'anoneditwarning';
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}
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if ( $parsed && $parsed['restoring'] ) {
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$wgVisualEditorEditNotices[] = 'editingold';
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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 ( $page->isSemiProtected() ) {
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$wgVisualEditorEditNotices[] = 'semiprotectedpagewarning';
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} else {
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# Then it must be protected based on static groups (regular)
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$wgVisualEditorEditNotices[] = 'protectedpagewarning';
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}
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}
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// Creating new page
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if ( !$page->exists() ) {
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$wgVisualEditorEditNotices[] = $user->isLoggedIn() ? 'newarticletext' : 'newarticletextanon';
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// Page protected from creation
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if ( $page->getRestrictions( 'create' ) ) {
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$wgVisualEditorEditNotices[] = 'titleprotectedwarning';
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}
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}
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if ( count( $wgVisualEditorEditNotices ) ) {
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foreach ( $wgVisualEditorEditNotices as $key ) {
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$notices[] = wfMessage( $key )->parseAsBlock();
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}
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}
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// HACK: Build a fake EditPage so we can get checkboxes from it
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$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 = $this->getRequest();
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$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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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' => $checkboxes,
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),
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$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( $params['wikitext'], $page->getText() );
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if ( $content === false ) {
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$this->dieUsage( 'Error querying MediaWiki API', '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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public function getAllowedParams() {
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return array(
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'page' => array(
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ApiBase::PARAM_REQUIRED => true,
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),
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'paction' => array(
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ApiBase::PARAM_REQUIRED => true,
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ApiBase::PARAM_TYPE => array(
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'parse', 'parsefragment', 'serializeforcache', 'serialize', 'diff', 'getlanglinks',
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),
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),
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'wikitext' => null,
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'basetimestamp' => null,
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'starttimestamp' => null,
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'oldid' => null,
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'html' => null,
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'cachekey' => null,
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);
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}
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public function needsToken() {
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return false;
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}
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public function mustBePosted() {
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return false;
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}
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public function isWriteMode() {
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return true;
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}
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public function getVersion() {
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return __CLASS__ . ': $Id$';
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}
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public function getParamDescription() {
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return array(
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'page' => 'The page to perform actions on.',
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'paction' => 'Action to perform',
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'oldid' => 'The revision number to use (defaults to latest version).',
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'html' => 'HTML to send to parsoid in exchange for wikitext',
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'basetimestamp' => 'When saving, set this to the timestamp of the revision that was'
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. ' edited. Used to detect edit conflicts.',
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'starttimestamp' => 'When saving, set this to the timestamp of when the page was loaded.'
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. ' Used to detect edit conflicts.',
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'cachekey' => 'For serialize or diff, use the result of a previous serializeforcache'
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. ' request with this key. Overrides html.',
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);
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}
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public function getDescription() {
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return 'Returns HTML5 for a page from the parsoid service.';
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}
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}
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