+ * Fetches raw data for a user
+ *
+ * @param string $request request url
+ * @param integer $uid User id of the requester
+ * @param boolean $binary TRUE if asked to return binary results (file download) (default is "false")
+ * @param array $opts (optional parameters) assoziative array with:
+ * 'accept_content' => supply Accept: header with 'accept_content' as the value
+ * 'timeout' => int Timeout in seconds, default system config value or 60 seconds
+ * 'http_auth' => username:password
+ * 'novalidate' => do not validate SSL certs, default is to validate using our CA list
+ * 'nobody' => only return the header
+ * 'cookiejar' => path to cookie jar file
+ *
+ * @return object CurlResult
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+ */
+ public static function fetchRaw($request, $uid = 0, $binary = false, $opts = [])
+ {
+ if (!empty($uid)) {
+ $owner = User::getOwnerDataById($uid);
+ if (!$owner) {
+ return;
+ }
+
+ // Header data that is about to be signed.
+ $host = parse_url($request, PHP_URL_HOST);
+ $path = parse_url($request, PHP_URL_PATH);
+ $date = DateTimeFormat::utcNow(DateTimeFormat::HTTP);
+
+ $headers = ['Date: ' . $date, 'Host: ' . $host];
+
+ $signed_data = "(request-target): get " . $path . "\ndate: ". $date . "\nhost: " . $host;
+
+ $signature = base64_encode(Crypto::rsaSign($signed_data, $owner['uprvkey'], 'sha256'));
+
+ $headers[] = 'Signature: keyId="' . $owner['url'] . '#main-key' . '",algorithm="rsa-sha256",headers="(request-target) date host",signature="' . $signature . '"';
+ } else {
+ $headers = [];
+ }
+
+ if (!empty($opts['accept_content'])) {
+ $headers[] = 'Accept: ' . $opts['accept_content'];
+ }
+
+ $curl_opts = $opts;
+ $curl_opts['header'] = $headers;
+
+ $curlResult = DI::httpRequest()->get($request, false, $curl_opts);
+ $return_code = $curlResult->getReturnCode();
+
+ Logger::log('Fetched for user ' . $uid . ' from ' . $request . ' returned ' . $return_code, Logger::DEBUG);
+
+ return $curlResult;
+ }
+
+ /**
+ * Gets a signer from a given HTTP request