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