http = new p3k\HTTP(); } private function respond(Response $response, $code, $params, $headers=[]) { $response->setStatusCode($code); foreach($headers as $k=>$v) { $response->headers->set($k, $v); } $response->headers->set('Content-Type', 'application/json'); $opts = JSON_UNESCAPED_SLASHES + JSON_FORCE_OBJECT; if($this->_pretty) $opts += JSON_PRETTY_PRINT; $response->setContent(json_encode($params, $opts)."\n"); return $response; } public function fetch(Request $request, Response $response) { if($request->get('timeout')) { // We might make 2 HTTP requests, so each request gets half the desired timeout $this->http->timeout = $request->get('timeout') / 2; } if($request->get('max_redirects')) { $this->http->max_redirects = (int)$request->get('max_redirects'); } if($request->get('pretty')) { $this->_pretty = true; } $url = $request->get('url'); if(!$url) { return $this->respond($response, 400, [ 'error' => 'missing_url', 'error_description' => 'Provide a URL to fetch' ]); } // Attempt some basic URL validation $scheme = parse_url($url, PHP_URL_SCHEME); if(!in_array($scheme, ['http','https'])) { return $this->respond($response, 400, [ 'error' => 'invalid_url', 'error_description' => 'Only http and https URLs are supported' ]); } $host = parse_url($url, PHP_URL_HOST); if(!$host) { return $this->respond($response, 400, [ 'error' => 'invalid_url', 'error_description' => 'The URL provided was not valid' ]); } $url = \normalize_url($url); $result = $this->http->get($url); $html = $result['body']; $mf2 = mf2\Parse($html, $result['url']); $rels = p3k\HTTP::link_rels($result['headers']); if(isset($mf2['rels'])) { $rels = array_merge($rels, $mf2['rels']); } // Resolve all relative URLs foreach($rels as $rel=>$values) { foreach($values as $i=>$value) { $value = \mf2\resolveUrl($result['url'], $value); $rels[$rel][$i] = $value; } } return $this->respond($response, 200, [ 'url' => $result['url'], 'code' => $result['code'], 'rels' => $rels ]); } }