diff options
Diffstat (limited to 'utility/articleenhancer/articleenhancer.php')
| -rw-r--r-- | utility/articleenhancer/articleenhancer.php | 186 |
1 files changed, 3 insertions, 183 deletions
diff --git a/utility/articleenhancer/articleenhancer.php b/utility/articleenhancer/articleenhancer.php index 1790d2457..1842a0c02 100644 --- a/utility/articleenhancer/articleenhancer.php +++ b/utility/articleenhancer/articleenhancer.php @@ -25,189 +25,9 @@ namespace OCA\News\Utility\ArticleEnhancer; -use \OCA\News\Utility\SimplePieFileFactory; - - -class ArticleEnhancer { - - - private $feedRegex; - private $purifier; - private $fileFactory; - private $maximumTimeout; - - - /** - * @param $purifier the purifier object to clean the html which will be - * matched - * @param SimplePieFileFactory a factory for getting a simple pie file instance - * @param array $regexXPathPair an associative array containing regex to - * match the url and the xpath that should be used for it to extract the - * page - * @param int $maximumTimeout maximum timeout in seconds, defaults to 10 sec - */ - public function __construct($purifier, SimplePieFileFactory $fileFactory, - array $regexXPathPair, $maximumTimeout=10){ - $this->purifier = $purifier; - $this->regexXPathPair = $regexXPathPair; - $this->fileFactory = $fileFactory; - $this->maximumTimeout = $maximumTimeout; - } - - - public function enhance($item){ - - foreach($this->regexXPathPair as $regex => $search) { - - if(preg_match($regex, $item->getUrl())) { - $file = $this->fileFactory->getFile($item->getUrl(), $this->maximumTimeout); - - // convert encoding by detecting charset from header - $contentType = $file->headers['content-type']; - if( preg_match( '/(?<=charset=)[^;]*/', $contentType, $matches ) ) { - $body = mb_convert_encoding($file->body, 'HTML-ENTITIES', $matches[0]); - } else { - $body = $file->body; - } - - $dom = new \DOMDocument(); - @$dom->loadHTML($body); - - $xpath = new \DOMXpath($dom); - $xpathResult = $xpath->evaluate($search); - - // in case it wasnt a text query assume its a single - if(!is_string($xpathResult)) { - $xpathResult = $this->domToString($xpathResult); - } - - // convert all relative to absolute URLs - $xpathResult = $this->substituteRelativeLinks($xpathResult, $item->getUrl()); - - $sanitizedResult = $this->purifier->purify($xpathResult); - $item->setBody($sanitizedResult); - } - } - - return $item; - } - - - /** - * Method which converts all relative "href" and "src" URLs of - * a HTML snippet with their absolute equivalent - * @param string $xmlString a HTML snippet as string with the relative URLs to be replaced - * @param string $absoluteUrl the approptiate absolute url of the HTML snippet - * @return string the result HTML snippet as a string - */ - protected function substituteRelativeLinks($xmlString, $absoluteUrl) { - $dom = new \DOMDocument(); - $dom->preserveWhiteSpace = false; - - // return, if xml is empty or loading the HTML fails - if( trim($xmlString) == "" || !$dom->loadHTML($xmlString) ) { - return $xmlString; - } - - // remove <!DOCTYPE - $dom->removeChild($dom->firstChild); - // remove <html></html> - $dom->replaceChild($dom->firstChild->firstChild, $dom->firstChild); - - $substitution = array("href", "src"); - - foreach ($substitution as $attribute) { - $xpath = new \DOMXpath($dom); - $xpathResult = $xpath->query("//*[@".$attribute." and not(contains(@".$attribute.", '://')) and not(starts-with(@".$attribute.", 'mailto:'))]"); - foreach ($xpathResult as $linkNode) { - $urlElement = $linkNode->attributes->getNamedItem($attribute); - $urlElement->nodeValue = htmlentities( $this->relativeToAbsoluteUrl( $urlElement->nodeValue, $absoluteUrl ) ); - } - } - - // save dom to string and remove <body></body> - $xmlString = substr(trim($dom->saveHTML()), 6, -7); - // domdocument spoils the string with line breaks between the elements. strip them. - $xmlString = str_replace("\n", "", $xmlString); - - return $xmlString; - } - - - /** - * Method which builds a URL by taking a relative URL and its corresponding - * absolute URL - * For examle relative URL "../example/path/file.php?a=1#anchor" and - * absolute URL "https://username:password@www.website.com/subfolder/index.html" - * will result in "https://username:password@www.website.com/example/path/file.php?a=1#anchor" - * @param string $relativeUrl the relative URL - * @param string $absoluteUrl the absolute URL with at least scheme and host - * @return string the resulting absolute URL - */ - protected function relativeToAbsoluteUrl($relativeUrl, $absoluteUrl) { - $abs = parse_url($absoluteUrl); - - $newUrl = $abs["scheme"]."://" - .( (isset($abs["user"])) ? $abs["user"] . ( (isset($abs["pass"])) ? ":".$abs["pass"] : "") . "@" : "" ) - .$abs["host"] - .( (isset($abs["port"])) ? ":".$abs["port"] : "" ); - - if(substr(trim($relativeUrl), 0, 1) == "/") { - // we have a relative url like "/a/path/file" - return $newUrl . $relativeUrl; - } else { - // we have a relative url like "a/path/file", handle "."" and ".." directories - - // the starting point is the absolute path, but with out the last part (we don't need the file name) - $newPath = explode("/", substr($abs["path"], 1) ); - array_pop($newPath); - - $relPath = parse_url($relativeUrl, PHP_URL_PATH); - $relPath = explode("/", $relPath); - - // cross the relative and the absolute path - for($i=0; $i<count($relPath)-1; $i++) { - if($relPath[$i] == ".") { - continue; - } elseif($relPath[$i] == "..") { - array_pop($newPath); - } else { - $newPath[] = $relPath[$i]; - } - } - - // add the last part (the file name) of the relative URL - $newPath[] = $relPath[ count($relPath)-1 ]; - $newPath = implode("/", $newPath); - - $rel = parse_url($relativeUrl); - return $newUrl . "/" . $newPath - . ( (isset($rel["query"])) ? "?".$rel["query"] : "") - . ( (isset($rel["fragment"])) ? "#".$rel["fragment"] : ""); - } - } - - - /** - * Method which turns an xpath result to a string - * you can customize it by overwriting this method - * @param $xpathResult the result from the xpath query - * @return the result as a string - */ - protected function domToString($xpathResult) { - $result = ""; - foreach($xpathResult as $node) { - $result .= $this->toInnerHTML($node); - } - return $result; - } - - - protected function toInnerHTML($node) { - $dom = new \DOMDocument(); - $dom->appendChild($dom->importNode($node, true)); - return trim($dom->saveHTML($dom->documentElement)); - } +use \OCA\News\Db\Item; +interface ArticleEnhancer { + public function enhance(Item $item); }
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