166 lines
4.1 KiB
PHP
166 lines
4.1 KiB
PHP
<?php
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namespace PicoFeed;
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require_once __DIR__.'/Parser.php';
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require_once __DIR__.'/RemoteResource.php';
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class Reader
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{
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private $url = '';
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private $content = '';
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public function __construct($content = '')
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{
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$this->content = $content;
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return $this;
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}
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public function download($url, $last_modified = '', $etag = '', $timeout = 5, $user_agent = 'PicoFeed (https://github.com/fguillot/picoFeed)')
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{
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if (strpos($url, 'http') !== 0) {
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$url = 'http://'.$url;
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}
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$resource = new RemoteResource($url, $timeout, $user_agent);
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$resource->setLastModified($last_modified);
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$resource->setEtag($etag);
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$resource->execute();
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$this->content = $resource->getContent();
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$this->url = $resource->getUrl();
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return $resource;
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}
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public function getContent()
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{
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return $this->content;
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}
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public function getUrl()
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{
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return $this->url;
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}
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public function getFirstTag($data)
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{
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// Strip HTML comments
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$data = preg_replace('/<!--(.*)-->/Uis', '', $data);
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// Strip Doctype
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$data = preg_replace('/<!DOCTYPE(.*)>/Uis', '', $data);
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// Find <?xml version....
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if (strpos($data, '<?xml') !== false) {
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$data = substr($data, strrpos($data, '?>') + 2);
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// Find the first tag
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$open_tag = strpos($data, '<');
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$close_tag = strpos($data, '>');
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return substr($data, $open_tag, $close_tag);
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}
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return $data;
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}
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public function getParser($discover = false)
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{
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$first_tag = $this->getFirstTag($this->content);
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if (strpos($first_tag, '<feed') !== false) {
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require_once __DIR__.'/Parsers/Atom.php';
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return new Atom($this->content);
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}
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else if (strpos($first_tag, '<rss') !== false &&
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(strpos($first_tag, 'version="2.0"') !== false || strpos($first_tag, 'version=\'2.0\'') !== false)) {
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require_once __DIR__.'/Parsers/Rss20.php';
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return new Rss20($this->content);
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}
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else if (strpos($first_tag, '<rss') !== false &&
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(strpos($first_tag, 'version="0.92"') !== false || strpos($first_tag, 'version=\'0.92\'') !== false)) {
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require_once __DIR__.'/Parsers/Rss92.php';
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return new Rss92($this->content);
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}
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else if (strpos($first_tag, '<rss') !== false &&
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(strpos($first_tag, 'version="0.91"') !== false || strpos($first_tag, 'version=\'0.91\'') !== false)) {
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require_once __DIR__.'/Parsers/Rss91.php';
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return new Rss91($this->content);
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}
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else if (strpos($first_tag, '<rdf:') !== false && strpos($first_tag, 'xmlns="http://purl.org/rss/1.0/"') !== false) {
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require_once __DIR__.'/Parsers/Rss10.php';
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return new Rss10($this->content);
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}
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else if ($discover === true) {
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return false;
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}
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else if ($this->discover()) {
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return $this->getParser(true);
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}
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return false;
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}
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public function discover()
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{
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if (! $this->content) {
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return false;
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}
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\libxml_use_internal_errors(true);
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$dom = new \DOMDocument;
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$dom->loadHTML($this->content);
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$xpath = new \DOMXPath($dom);
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$queries = array(
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"//link[@type='application/atom+xml']",
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"//link[@type='application/rss+xml']"
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);
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foreach ($queries as $query) {
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$nodes = $xpath->query($query);
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if ($nodes->length !== 0) {
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$link = $nodes->item(0)->getAttribute('href');
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// Relative links
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if (strpos($link, 'http') !== 0) {
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if ($link{0} === '/') $link = substr($link, 1);
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if ($this->url{strlen($this->url) - 1} !== '/') $this->url .= '/';
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$link = $this->url.$link;
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}
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$this->download($link);
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return true;
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}
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}
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return false;
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}
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}
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