nextcloud/lib/private/Http/Client/Client.php

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<?php
declare(strict_types=1);
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Daniel Kesselberg <mail@danielkesselberg.de>
* @author Joas Schilling <coding@schilljs.com>
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* @author Lukas Reschke <lukas@statuscode.ch>
* @author Mohammed Abdellatif <m.latief@gmail.com>
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* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Scott Shambarger <devel@shambarger.net>
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*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
namespace OC\Http\Client;
use GuzzleHttp\Client as GuzzleClient;
use GuzzleHttp\RequestOptions;
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use OCP\Http\Client\IClient;
use OCP\Http\Client\IResponse;
use OCP\Http\Client\LocalServerException;
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use OCP\ICertificateManager;
use OCP\IConfig;
use OCP\ILogger;
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/**
* Class Client
*
* @package OC\Http
*/
class Client implements IClient {
/** @var GuzzleClient */
private $client;
/** @var IConfig */
private $config;
/** @var ILogger */
private $logger;
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/** @var ICertificateManager */
private $certificateManager;
public function __construct(
IConfig $config,
ILogger $logger,
ICertificateManager $certificateManager,
GuzzleClient $client
) {
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$this->config = $config;
$this->logger = $logger;
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$this->client = $client;
$this->certificateManager = $certificateManager;
}
private function buildRequestOptions(array $options): array {
$proxy = $this->getProxyUri();
$defaults = [
RequestOptions::VERIFY => $this->getCertBundle(),
RequestOptions::TIMEOUT => 30,
];
// Only add RequestOptions::PROXY if Nextcloud is explicitly
// configured to use a proxy. This is needed in order not to override
// Guzzle default values.
if ($proxy !== null) {
$defaults[RequestOptions::PROXY] = $proxy;
}
$options = array_merge($defaults, $options);
if (!isset($options[RequestOptions::HEADERS]['User-Agent'])) {
$options[RequestOptions::HEADERS]['User-Agent'] = 'Nextcloud Server Crawler';
}
if (!isset($options[RequestOptions::HEADERS]['Accept-Encoding'])) {
$options[RequestOptions::HEADERS]['Accept-Encoding'] = 'gzip';
}
return $options;
}
private function getCertBundle(): string {
if ($this->certificateManager->listCertificates() !== []) {
return $this->certificateManager->getAbsoluteBundlePath();
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}
// If the instance is not yet setup we need to use the static path as
// $this->certificateManager->getAbsoluteBundlePath() tries to instantiiate
// a view
if ($this->config->getSystemValue('installed', false)) {
return $this->certificateManager->getAbsoluteBundlePath(null);
}
return \OC::$SERVERROOT . '/resources/config/ca-bundle.crt';
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}
/**
* Returns a null or an associative array specifiying the proxy URI for
* 'http' and 'https' schemes, in addition to a 'no' key value pair
* providing a list of host names that should not be proxied to.
*
* @return array|null
*
* The return array looks like:
* [
* 'http' => 'username:password@proxy.example.com',
* 'https' => 'username:password@proxy.example.com',
* 'no' => ['foo.com', 'bar.com']
* ]
*
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*/
private function getProxyUri(): ?array {
$proxyHost = $this->config->getSystemValue('proxy', '');
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if ($proxyHost === '' || $proxyHost === null) {
return null;
}
$proxyUserPwd = $this->config->getSystemValue('proxyuserpwd', '');
if ($proxyUserPwd !== '' && $proxyUserPwd !== null) {
$proxyHost = $proxyUserPwd . '@' . $proxyHost;
}
$proxy = [
'http' => $proxyHost,
'https' => $proxyHost,
];
$proxyExclude = $this->config->getSystemValue('proxyexclude', []);
if ($proxyExclude !== [] && $proxyExclude !== null) {
$proxy['no'] = $proxyExclude;
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}
return $proxy;
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}
protected function preventLocalAddress(string $uri, array $options): void {
if (($options['nextcloud']['allow_local_address'] ?? false) ||
$this->config->getSystemValueBool('allow_local_remote_servers', false)) {
return;
}
$host = parse_url($uri, PHP_URL_HOST);
if ($host === false) {
$this->logger->warning("Could not detect any host in $uri");
throw new LocalServerException('Could not detect any host');
}
$host = strtolower($host);
// remove brackets from IPv6 addresses
if (strpos($host, '[') === 0 && substr($host, -1) === ']') {
$host = substr($host, 1, -1);
}
// Disallow localhost and local network
if ($host === 'localhost' || substr($host, -6) === '.local' || substr($host, -10) === '.localhost') {
$this->logger->warning("Host $host was not connected to because it violates local access rules");
throw new LocalServerException('Host violates local access rules');
}
// Disallow hostname only
if (substr_count($host, '.') === 0) {
$this->logger->warning("Host $host was not connected to because it violates local access rules");
throw new LocalServerException('Host violates local access rules');
}
if ((bool)filter_var($host, FILTER_VALIDATE_IP) && !filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
$this->logger->warning("Host $host was not connected to because it violates local access rules");
throw new LocalServerException('Host violates local access rules');
}
// Also check for IPv6 IPv4 nesting, because that's not covered by filter_var
if ((bool)filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) && substr_count($host, '.') > 0) {
$delimiter = strrpos($host, ':'); // Get last colon
$ipv4Address = substr($host, $delimiter + 1);
if (!filter_var($ipv4Address, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
$this->logger->warning("Host $host was not connected to because it violates local access rules");
throw new LocalServerException('Host violates local access rules');
}
}
}
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/**
* Sends a GET request
*
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* @param string $uri
* @param array $options Array such as
* 'query' => [
* 'field' => 'abc',
* 'other_field' => '123',
* 'file_name' => fopen('/path/to/file', 'r'),
* ],
* 'headers' => [
* 'foo' => 'bar',
* ],
* 'cookies' => ['
* 'foo' => 'bar',
* ],
* 'allow_redirects' => [
* 'max' => 10, // allow at most 10 redirects.
* 'strict' => true, // use "strict" RFC compliant redirects.
* 'referer' => true, // add a Referer header
* 'protocols' => ['https'] // only allow https URLs
* ],
* 'save_to' => '/path/to/file', // save to a file or a stream
* 'verify' => true, // bool or string to CA file
* 'debug' => true,
* 'timeout' => 5,
* @return IResponse
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* @throws \Exception If the request could not get completed
*/
public function get(string $uri, array $options = []): IResponse {
$this->preventLocalAddress($uri, $options);
$response = $this->client->request('get', $uri, $this->buildRequestOptions($options));
$isStream = isset($options['stream']) && $options['stream'];
return new Response($response, $isStream);
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}
/**
* Sends a HEAD request
*
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* @param string $uri
* @param array $options Array such as
* 'headers' => [
* 'foo' => 'bar',
* ],
* 'cookies' => ['
* 'foo' => 'bar',
* ],
* 'allow_redirects' => [
* 'max' => 10, // allow at most 10 redirects.
* 'strict' => true, // use "strict" RFC compliant redirects.
* 'referer' => true, // add a Referer header
* 'protocols' => ['https'] // only allow https URLs
* ],
* 'save_to' => '/path/to/file', // save to a file or a stream
* 'verify' => true, // bool or string to CA file
* 'debug' => true,
* 'timeout' => 5,
* @return IResponse
* @throws \Exception If the request could not get completed
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*/
public function head(string $uri, array $options = []): IResponse {
$this->preventLocalAddress($uri, $options);
$response = $this->client->request('head', $uri, $this->buildRequestOptions($options));
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return new Response($response);
}
/**
* Sends a POST request
*
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* @param string $uri
* @param array $options Array such as
* 'body' => [
* 'field' => 'abc',
* 'other_field' => '123',
* 'file_name' => fopen('/path/to/file', 'r'),
* ],
* 'headers' => [
* 'foo' => 'bar',
* ],
* 'cookies' => ['
* 'foo' => 'bar',
* ],
* 'allow_redirects' => [
* 'max' => 10, // allow at most 10 redirects.
* 'strict' => true, // use "strict" RFC compliant redirects.
* 'referer' => true, // add a Referer header
* 'protocols' => ['https'] // only allow https URLs
* ],
* 'save_to' => '/path/to/file', // save to a file or a stream
* 'verify' => true, // bool or string to CA file
* 'debug' => true,
* 'timeout' => 5,
* @return IResponse
* @throws \Exception If the request could not get completed
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*/
public function post(string $uri, array $options = []): IResponse {
$this->preventLocalAddress($uri, $options);
if (isset($options['body']) && is_array($options['body'])) {
$options['form_params'] = $options['body'];
unset($options['body']);
}
$response = $this->client->request('post', $uri, $this->buildRequestOptions($options));
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return new Response($response);
}
/**
* Sends a PUT request
*
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* @param string $uri
* @param array $options Array such as
* 'body' => [
* 'field' => 'abc',
* 'other_field' => '123',
* 'file_name' => fopen('/path/to/file', 'r'),
* ],
* 'headers' => [
* 'foo' => 'bar',
* ],
* 'cookies' => ['
* 'foo' => 'bar',
* ],
* 'allow_redirects' => [
* 'max' => 10, // allow at most 10 redirects.
* 'strict' => true, // use "strict" RFC compliant redirects.
* 'referer' => true, // add a Referer header
* 'protocols' => ['https'] // only allow https URLs
* ],
* 'save_to' => '/path/to/file', // save to a file or a stream
* 'verify' => true, // bool or string to CA file
* 'debug' => true,
* 'timeout' => 5,
* @return IResponse
* @throws \Exception If the request could not get completed
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*/
public function put(string $uri, array $options = []): IResponse {
$this->preventLocalAddress($uri, $options);
$response = $this->client->request('put', $uri, $this->buildRequestOptions($options));
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return new Response($response);
}
/**
* Sends a DELETE request
*
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* @param string $uri
* @param array $options Array such as
* 'body' => [
* 'field' => 'abc',
* 'other_field' => '123',
* 'file_name' => fopen('/path/to/file', 'r'),
* ],
* 'headers' => [
* 'foo' => 'bar',
* ],
* 'cookies' => ['
* 'foo' => 'bar',
* ],
* 'allow_redirects' => [
* 'max' => 10, // allow at most 10 redirects.
* 'strict' => true, // use "strict" RFC compliant redirects.
* 'referer' => true, // add a Referer header
* 'protocols' => ['https'] // only allow https URLs
* ],
* 'save_to' => '/path/to/file', // save to a file or a stream
* 'verify' => true, // bool or string to CA file
* 'debug' => true,
* 'timeout' => 5,
* @return IResponse
* @throws \Exception If the request could not get completed
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*/
public function delete(string $uri, array $options = []): IResponse {
$this->preventLocalAddress($uri, $options);
$response = $this->client->request('delete', $uri, $this->buildRequestOptions($options));
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return new Response($response);
}
/**
* Sends a options request
*
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* @param string $uri
* @param array $options Array such as
* 'body' => [
* 'field' => 'abc',
* 'other_field' => '123',
* 'file_name' => fopen('/path/to/file', 'r'),
* ],
* 'headers' => [
* 'foo' => 'bar',
* ],
* 'cookies' => ['
* 'foo' => 'bar',
* ],
* 'allow_redirects' => [
* 'max' => 10, // allow at most 10 redirects.
* 'strict' => true, // use "strict" RFC compliant redirects.
* 'referer' => true, // add a Referer header
* 'protocols' => ['https'] // only allow https URLs
* ],
* 'save_to' => '/path/to/file', // save to a file or a stream
* 'verify' => true, // bool or string to CA file
* 'debug' => true,
* 'timeout' => 5,
* @return IResponse
* @throws \Exception If the request could not get completed
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*/
public function options(string $uri, array $options = []): IResponse {
$this->preventLocalAddress($uri, $options);
$response = $this->client->request('options', $uri, $this->buildRequestOptions($options));
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return new Response($response);
}
}