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58 lines
2.6 KiB
PHP
58 lines
2.6 KiB
PHP
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<?php
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/** @license MIT
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* Copyright 2017 J. King, Dustin Wilson et al.
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* See LICENSE and AUTHORS files for details */
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declare(strict_types=1);
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namespace JKingWeb\Arsse\REST\Microsub;
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use JKingWeb\Arsse\Misc\URL;
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use Psr\Http\Message\ServerRequestInterface;
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use Psr\Http\Message\ResponseInterface;
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use Zend\Diactoros\Response\HtmlResponse as Response;
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use Zend\Diactoros\Response\EmptyResponse;
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class Auth extends \JKingWeb\Arsse\REST\AbstractHandler {
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public function __construct() {
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}
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public function dispatch(ServerRequestInterface $req): ResponseInterface {
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// ensure that a user name is specified in the path
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// if the path is empty or contains a slash, this is not a URL we handle
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$id = parse_url($req->getRequestTarget())['path'] ?? "";
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if (!strlen($id) || strpos($id, "/") !== false) {
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return new EmptyResponse(404);
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}
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$id = rawurldecode($id);
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// gather the query parameters and act on the "proc" parameter
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$method = "do".ucfirst(strtolower($req->getQueryParams()['proc'] ?? "discovery"));
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if (!method_exists($this, $method)) {
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return new EmptyResponse(404);
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} else {
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return $this->$method($id, $req);
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}
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}
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protected function doDiscovery(string $user, ServerRequestInterface $req): ResponseInterface {
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// construct the base user identifier URL; the user is never checked against the database
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// as this route is publicly accessible, for reasons of privacy requests for user discovery work regardless of whether the user exists
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$s = $req->getServerParams();
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$https = (strlen($s['HTTPS'] ?? "") && $s['HTTPS'] !== "off");
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$port = (int) $s['SERVER_PORT'];
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$port = (!$port || ($https && $port == 443) || (!$https && $port == 80)) ? "" : ":$port";
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$base = URL::normalize(($https ? "https" : "http")."://".$s['HTTP_HOST'].$port."/");
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$id = $base."u/".rawurlencode($user);
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// prepare authroizer, token, and Microsub endpoint URLs
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$urlAuth = $id."?proc=login";
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$urlToken = $id."?proc=issue";
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$urlService = $base."microsub";
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// output an extremely basic identity resource
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$html = '<meta charset="UTF-8"><link rel="authorization_endpoint" href="'.htmlspecialchars($urlAuth).'"><link rel="token_endpoint" href="'.htmlspecialchars($urlToken).'"><link rel="microsub" href="'.htmlspecialchars($urlService).'">';
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return new Response($html, 200, [
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"Link: <$urlAuth>; rel=\"authorization_endpoint\"",
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"Link: <$urlToken>; rel=\"token_endpoint\"",
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"Link: <$urlService>; rel=\"microsub\"",
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]);
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}
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}
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