<?php

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// SPDX-FileCopyrightText: 2004-2023 Ryan Parman, Sam Sneddon, Ryan McCue

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// SPDX-License-Identifier: BSD-3-Clause

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declare(strict_types=1);

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namespace SimplePie\HTTP;

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use InvalidArgumentException;

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use Psr\Http\Client\ClientExceptionInterface;

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use Psr\Http\Client\ClientInterface;

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use Psr\Http\Message\RequestFactoryInterface;

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use Psr\Http\Message\UriFactoryInterface;

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use Throwable;

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/**

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* HTTP Client based on PSR-18 and PSR-17 implementations

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*

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* @internal

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*/

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final class Psr18Client implements Client

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{

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/**

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* @var ClientInterface

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*/

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private $httpClient;

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/**

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* @var RequestFactoryInterface

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*/

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private $requestFactory;

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/**

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* @var UriFactoryInterface

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*/

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private $uriFactory;

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/**

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* @var int

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*/

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private $allowedRedirects = 5;

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public function __construct(ClientInterface $httpClient, RequestFactoryInterface $requestFactory, UriFactoryInterface $uriFactory)

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{

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$this->httpClient = $httpClient;

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$this->requestFactory = $requestFactory;

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$this->uriFactory = $uriFactory;

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}

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public function getHttpClient(): ClientInterface

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{

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return $this->httpClient;

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}

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public function getRequestFactory(): RequestFactoryInterface

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{

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return $this->requestFactory;

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}

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public function getUriFactory(): UriFactoryInterface

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{

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return $this->uriFactory;

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}

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/**

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* send a request and return the response

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*

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* @param Client::METHOD_* $method

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* @param string $url

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* @param array<string,string|string[]> $headers

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*

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* @throws ClientException if anything goes wrong requesting the data

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*/

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public function request(string $method, string $url, array $headers = []): Response

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{

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if ($method !== self::METHOD_GET) {

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throw new InvalidArgumentException(sprintf(

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'%s(): Argument #1 ($method) only supports method "%s".',

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__METHOD__,

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self::METHOD_GET

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), 1);

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}

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if (preg_match('/^http(s)?:\/\//i', $url)) {

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return $this->requestUrl($method, $url, $headers);

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}

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return $this->requestLocalFile($url);

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}

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/**

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* @param array<string,string|string[]> $headers

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*/

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private function requestUrl(string $method, string $url, array $headers): Response

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{

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$permanentUrl = $url;

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$requestedUrl = $url;

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$remainingRedirects = $this->allowedRedirects;

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$request = $this->requestFactory->createRequest(

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$method,

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$this->uriFactory->createUri($requestedUrl)

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);

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foreach ($headers as $name => $value) {

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$request = $request->withHeader($name, $value);

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}

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do {

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$followRedirect = false;

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try {

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$response = $this->httpClient->sendRequest($request);

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} catch (ClientExceptionInterface $th) {

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throw new ClientException($th->getMessage(), $th->getCode(), $th);

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}

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$statusCode = $response->getStatusCode();

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// If we have a redirect

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if (in_array($statusCode, [300, 301, 302, 303, 307]) && $response->hasHeader('Location')) {

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// Prevent infinity redirect loops

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if ($remainingRedirects <= 0) {

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break;

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}

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$remainingRedirects--;

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$followRedirect = true;

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$requestedUrl = $response->getHeaderLine('Location');

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if ($statusCode === 301) {

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$permanentUrl = $requestedUrl;

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}

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$request = $request->withUri($this->uriFactory->createUri($requestedUrl));

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}

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} while ($followRedirect);

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return new Psr7Response($response, $permanentUrl, $requestedUrl);

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}

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private function requestLocalFile(string $path): Response

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{

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if (!is_readable($path)) {

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throw new ClientException(sprintf('file "%s" is not readable', $path));

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}

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try {

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$raw = file_get_contents($path);

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} catch (Throwable $th) {

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throw new ClientException($th->getMessage(), $th->getCode(), $th);

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}

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if ($raw === false) {

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throw new ClientException('file_get_contents() could not read the file', 1);

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}

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return new RawTextResponse($raw, $path);

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}

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}

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