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<?php
use Digitigrade\GlobalConfig;
use Digitigrade\Model\Actor;
use Digitigrade\Model\Instance;
/**
* Makes an HTTPS request to a remote instance, using the corresponding outbound auth token (if any)
* @param string $uri
* @param bool $dontLookUpInstance if true, will skip looking up the Instance, and consequently the auth token
* @param string $method HTTP verb
* @param ?Actor $actingAs if specified, the local actor to send the request on behalf of
* @return stdClass object with fields `body` and `headers`
*/
function send_request_authenticated(
string $uri,
bool $dontLookUpInstance = false,
string $method = 'GET',
?Actor $actingAs = null
) {
if (!str_starts_with($uri, 'https://')) {
throw new RuntimeException('refusing to fetch a non-https uri');
}
$remoteHost = hostname_from_uri($uri);
if ($remoteHost == GlobalConfig::getInstance()->getCanonicalHost()) {
throw new RuntimeException('refusing to fetch content from myself');
}
$instance = null;
if (!$dontLookUpInstance) {
$instance = Instance::findByHostname($remoteHost);
}
if (!isset($instance->auth->outboundToken) || $instance->auth->outboundToken == null) {
// hopefully we can make the request anyway?
$context = stream_context_create(['http' => ['method' => $method]]);
$resp = file_get_contents($uri);
// $http_response_header just poofs into existence .
// i don't like this api. i should probably use curl instead. hmm
// TODO: use curl instead of file_get_contents
if (str_contains($http_response_header[0], '401') || str_contains($http_response_header[0], '403')) {
// we can't authenticate right now because it's asynchronous
// so i'm choosing to begin the auth process now and return false in the hopes that
// this request will be retried later
$instance?->beginOutboundAuth();
}
$result = new stdClass();
$result->body = $resp;
$result->headers = $http_response_header;
return $result;
}
$header = 'Authorization: Bearer ' . $instance->auth->outboundToken;
if ($actingAs != null) {
$header .= "\nX-PawPub-Actor: $actingAs->uri";
}
$context = stream_context_create(['http' => [
'method' => $method,
'header' => $header
]]);
$result = new stdClass();
$result->body = file_get_contents($uri, context: $context);
$result->headers = $http_response_header;
return $result;
}
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