Verzeichnisstruktur phpBB-3.2.0
- Veröffentlicht
- 06.01.2017
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Parser.php
001 <?php
002
003 /*
004 * @package s9e\TextFormatter
005 * @copyright Copyright (c) 2010-2016 The s9e Authors
006 * @license http://www.opensource.org/licenses/mit-license.php The MIT License
007 */
008 namespace s9e\TextFormatter\Plugins\MediaEmbed;
009 use s9e\TextFormatter\Parser as TagStack;
010 use s9e\TextFormatter\Parser\Tag;
011 use s9e\TextFormatter\Plugins\ParserBase;
012 use s9e\TextFormatter\Utils\Http;
013 class Parser extends ParserBase
014 {
015 protected static $client;
016 public function parse($text, array $matches)
017 {
018 foreach ($matches as $m)
019 {
020 $url = $m[0][0];
021 $pos = $m[0][1];
022 $len = \strlen($url);
023 $tag = $this->parser->addSelfClosingTag($this->config['tagName'], $pos, $len, -10);
024 $tag->setAttribute('url', $url);
025 }
026 }
027 public static function filterTag(Tag $tag, TagStack $tagStack, array $sites)
028 {
029 if ($tag->hasAttribute('site'))
030 self::addTagFromMediaId($tag, $tagStack, $sites);
031 elseif ($tag->hasAttribute('url'))
032 self::addTagFromMediaUrl($tag, $tagStack, $sites);
033 return \false;
034 }
035 public static function hasNonDefaultAttribute(Tag $tag)
036 {
037 foreach ($tag->getAttributes() as $attrName => $void)
038 if ($attrName !== 'url')
039 return \true;
040 return \false;
041 }
042 public static function scrape(Tag $tag, array $scrapeConfig, $cacheDir = \null)
043 {
044 if ($tag->hasAttribute('url'))
045 {
046 $url = $tag->getAttribute('url');
047 if (\preg_match('#^https?://[^<>"\'\\s]+$#D', $url))
048 foreach ($scrapeConfig as $scrape)
049 self::scrapeEntry($url, $tag, $scrape, $cacheDir);
050 }
051 return \true;
052 }
053 protected static function addSiteTag(Tag $tag, TagStack $tagStack, $siteId)
054 {
055 $endTag = $tag->getEndTag() ?: $tag;
056 $lpos = $tag->getPos();
057 $rpos = $endTag->getPos() + $endTag->getLen();
058 $tagStack->addTagPair(\strtoupper($siteId), $lpos, 0, $rpos, 0, $tag->getSortPriority())->setAttributes($tag->getAttributes());
059 }
060 protected static function addTagFromMediaId(Tag $tag, TagStack $tagStack, array $sites)
061 {
062 $siteId = \strtolower($tag->getAttribute('site'));
063 if (\in_array($siteId, $sites, \true))
064 self::addSiteTag($tag, $tagStack, $siteId);
065 }
066 protected static function addTagFromMediaUrl(Tag $tag, TagStack $tagStack, array $sites)
067 {
068 $p = \parse_url($tag->getAttribute('url'));
069 if (isset($p['scheme']) && isset($sites[$p['scheme'] . ':']))
070 $siteId = $sites[$p['scheme'] . ':'];
071 elseif (isset($p['host']))
072 $siteId = self::findSiteIdByHost($p['host'], $sites);
073 if (!empty($siteId))
074 self::addSiteTag($tag, $tagStack, $siteId);
075 }
076 protected static function findSiteIdByHost($host, array $sites)
077 {
078 do
079 {
080 if (isset($sites[$host]))
081 return $sites[$host];
082 $pos = \strpos($host, '.');
083 if ($pos === \false)
084 break;
085 $host = \substr($host, 1 + $pos);
086 }
087 while ($host > '');
088 return \false;
089 }
090 protected static function getHttpClient()
091 {
092 if (!isset(self::$client))
093 self::$client = Http::getClient();
094 self::$client->timeout = 10;
095 return self::$client;
096 }
097 protected static function replaceTokens($url, array $vars)
098 {
099 return \preg_replace_callback(
100 '#\\{@(\\w+)\\}#',
101 function ($m) use ($vars)
102 {
103 return (isset($vars[$m[1]])) ? $vars[$m[1]] : '';
104 },
105 $url
106 );
107 }
108 protected static function scrapeEntry($url, Tag $tag, array $scrape, $cacheDir)
109 {
110 list($matchRegexps, $extractRegexps, $attrNames) = $scrape;
111 if (!self::tagIsMissingAnyAttribute($tag, $attrNames))
112 return;
113 $vars = array();
114 $matched = \false;
115 foreach ((array) $matchRegexps as $matchRegexp)
116 if (\preg_match($matchRegexp, $url, $m))
117 {
118 $vars += $m;
119 $matched = \true;
120 }
121 if (!$matched)
122 return;
123 $vars += $tag->getAttributes();
124 $scrapeUrl = (isset($scrape[3])) ? self::replaceTokens($scrape[3], $vars) : $url;
125 self::scrapeUrl($scrapeUrl, $tag, (array) $extractRegexps, $cacheDir);
126 }
127 protected static function scrapeUrl($url, Tag $tag, array $regexps, $cacheDir)
128 {
129 $content = self::wget($url, $cacheDir);
130 foreach ($regexps as $regexp)
131 if (\preg_match($regexp, $content, $m))
132 foreach ($m as $k => $v)
133 if (!\is_numeric($k) && !$tag->hasAttribute($k))
134 $tag->setAttribute($k, $v);
135 }
136 protected static function tagIsMissingAnyAttribute(Tag $tag, array $attrNames)
137 {
138 foreach ($attrNames as $attrName)
139 if (!$tag->hasAttribute($attrName))
140 return \true;
141 return \false;
142 }
143 protected static function wget($url, $cacheDir = \null)
144 {
145 $prefix = '';
146 $url = \preg_replace('(#.*)s', '', $url);
147 if (isset($cacheDir) && \file_exists($cacheDir))
148 {
149 $cacheFile = $cacheDir . '/http.' . \crc32($url);
150 if (\extension_loaded('zlib'))
151 {
152 $prefix = 'compress.zlib://';
153 $cacheFile .= '.gz';
154 }
155 if (\file_exists($cacheFile))
156 return \file_get_contents($prefix . $cacheFile);
157 }
158 $content = @self::getHttpClient()->get($url, array('User-Agent: PHP (not Mozilla)'));
159 if (isset($cacheFile) && !empty($content))
160 \file_put_contents($prefix . $cacheFile, $content);
161 return $content;
162 }
163 }