mirror of
https://github.com/RSS-Bridge/rss-bridge.git
synced 2024-11-22 17:45:40 +03:00
291 lines
9.2 KiB
PHP
291 lines
9.2 KiB
PHP
<?php
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class HttpException extends \Exception
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{
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public ?Response $response;
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public function __construct(string $message = '', int $statusCode = 0, ?Response $response = null)
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{
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parent::__construct($message, $statusCode);
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$this->response = $response ?? new Response('', 0);
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}
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public static function fromResponse(Response $response, string $url): HttpException
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{
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$message = sprintf(
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'%s resulted in %s %s %s',
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$url,
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$response->getCode(),
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$response->getStatusLine(),
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// If debug, include a part of the response body in the exception message
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Debug::isEnabled() ? mb_substr($response->getBody(), 0, 500) : '',
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);
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if (CloudFlareException::isCloudFlareResponse($response)) {
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return new CloudFlareException($message, $response->getCode(), $response);
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}
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return new HttpException(trim($message), $response->getCode(), $response);
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}
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}
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final class CloudFlareException extends HttpException
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{
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public static function isCloudFlareResponse(Response $response): bool
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{
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$cloudflareTitles = [
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'<title>Just a moment...',
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'<title>Please Wait...',
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'<title>Attention Required!',
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'<title>Security | Glassdoor',
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'<title>Access denied</title>', // cf as seen on patreon.com
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];
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foreach ($cloudflareTitles as $cloudflareTitle) {
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if (str_contains($response->getBody(), $cloudflareTitle)) {
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return true;
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}
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}
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return false;
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}
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}
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interface HttpClient
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{
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public function request(string $url, array $config = []): Response;
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}
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final class CurlHttpClient implements HttpClient
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{
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public function request(string $url, array $config = []): Response
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{
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$defaults = [
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'useragent' => null,
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'timeout' => 5,
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'headers' => [],
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'proxy' => null,
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'curl_options' => [],
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'if_not_modified_since' => null,
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'retries' => 3,
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'max_filesize' => null,
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'max_redirections' => 5,
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];
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$config = array_merge($defaults, $config);
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$ch = curl_init($url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
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curl_setopt($ch, CURLOPT_MAXREDIRS, $config['max_redirections']);
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curl_setopt($ch, CURLOPT_HEADER, false);
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$httpHeaders = [];
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foreach ($config['headers'] as $name => $value) {
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$httpHeaders[] = sprintf('%s: %s', $name, $value);
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}
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curl_setopt($ch, CURLOPT_HTTPHEADER, $httpHeaders);
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if ($config['useragent']) {
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curl_setopt($ch, CURLOPT_USERAGENT, $config['useragent']);
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}
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curl_setopt($ch, CURLOPT_TIMEOUT, $config['timeout']);
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curl_setopt($ch, CURLOPT_ENCODING, '');
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curl_setopt($ch, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
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if ($config['max_filesize']) {
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// This option inspects the Content-Length header
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curl_setopt($ch, CURLOPT_MAXFILESIZE, $config['max_filesize']);
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curl_setopt($ch, CURLOPT_NOPROGRESS, false);
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// This progress function will monitor responses who omit the Content-Length header
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curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, function ($ch, $downloadSize, $downloaded, $uploadSize, $uploaded) use ($config) {
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if ($downloaded > $config['max_filesize']) {
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// Return a non-zero value to abort the transfer
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return -1;
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}
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return 0;
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});
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}
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if ($config['proxy']) {
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curl_setopt($ch, CURLOPT_PROXY, $config['proxy']);
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}
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if (curl_setopt_array($ch, $config['curl_options']) === false) {
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throw new \Exception('Tried to set an illegal curl option');
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}
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if ($config['if_not_modified_since']) {
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curl_setopt($ch, CURLOPT_TIMEVALUE, $config['if_not_modified_since']);
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curl_setopt($ch, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
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}
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$responseStatusLines = [];
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$responseHeaders = [];
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curl_setopt($ch, CURLOPT_HEADERFUNCTION, function ($ch, $rawHeader) use (&$responseHeaders, &$responseStatusLines) {
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$len = strlen($rawHeader);
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if ($rawHeader === "\r\n") {
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return $len;
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}
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if (preg_match('#^HTTP/(2|1.1|1.0)#', $rawHeader)) {
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$responseStatusLines[] = trim($rawHeader);
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return $len;
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}
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$header = explode(':', $rawHeader);
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if (count($header) === 1) {
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return $len;
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}
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$name = mb_strtolower(trim($header[0]));
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$value = trim(implode(':', array_slice($header, 1)));
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if (!isset($responseHeaders[$name])) {
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$responseHeaders[$name] = [];
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}
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$responseHeaders[$name][] = $value;
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return $len;
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});
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$attempts = 0;
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while (true) {
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$attempts++;
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$body = curl_exec($ch);
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if ($body !== false) {
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// The network call was successful, so break out of the loop
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break;
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}
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if ($attempts > $config['retries']) {
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// Finally give up
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$curl_error = curl_error($ch);
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$curl_errno = curl_errno($ch);
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throw new HttpException(sprintf(
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'cURL error %s: %s (%s) for %s',
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$curl_error,
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$curl_errno,
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'https://curl.haxx.se/libcurl/c/libcurl-errors.html',
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$url
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));
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}
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}
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$statusCode = curl_getinfo($ch, CURLINFO_RESPONSE_CODE);
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curl_close($ch);
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return new Response($body, $statusCode, $responseHeaders);
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}
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}
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final class Response
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{
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public const STATUS_CODES = [
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'100' => 'Continue',
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'101' => 'Switching Protocols',
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'200' => 'OK',
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'201' => 'Created',
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'202' => 'Accepted',
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'203' => 'Non-Authoritative Information',
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'204' => 'No Content',
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'205' => 'Reset Content',
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'206' => 'Partial Content',
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'300' => 'Multiple Choices',
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'301' => 'Moved Permanently',
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'302' => 'Found',
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'303' => 'See Other',
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'304' => 'Not Modified',
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'305' => 'Use Proxy',
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'400' => 'Bad Request',
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'401' => 'Unauthorized',
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'402' => 'Payment Required',
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'403' => 'Forbidden',
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'404' => 'Not Found',
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'405' => 'Method Not Allowed',
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'406' => 'Not Acceptable',
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'407' => 'Proxy Authentication Required',
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'408' => 'Request Timeout',
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'409' => 'Conflict',
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'410' => 'Gone',
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'411' => 'Length Required',
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'412' => 'Precondition Failed',
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'413' => 'Request Entity Too Large',
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'414' => 'Request-URI Too Long',
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'415' => 'Unsupported Media Type',
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'416' => 'Requested Range Not Satisfiable',
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'417' => 'Expectation Failed',
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'429' => 'Too Many Requests',
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'500' => 'Internal Server Error',
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'501' => 'Not Implemented',
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'502' => 'Bad Gateway',
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'503' => 'Service Unavailable',
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'504' => 'Gateway Timeout',
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'505' => 'HTTP Version Not Supported'
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];
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private string $body;
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private int $code;
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private array $headers;
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public function __construct(
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string $body = '',
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int $code = 200,
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array $headers = []
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) {
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$this->body = $body;
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$this->code = $code;
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$this->headers = [];
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foreach ($headers as $name => $value) {
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$name = mb_strtolower($name);
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if (!isset($this->headers[$name])) {
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$this->headers[$name] = [];
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}
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if (is_string($value)) {
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$this->headers[$name][] = $value;
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}
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if (is_array($value)) {
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$this->headers[$name] = $value;
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}
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}
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}
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public function getBody(): string
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{
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return $this->body;
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}
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public function getCode(): int
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{
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return $this->code;
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}
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public function getStatusLine(): string
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{
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return self::STATUS_CODES[$this->code] ?? '';
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}
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public function getHeaders(): array
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{
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return $this->headers;
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}
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/**
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* @return string[]|string|null
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*/
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public function getHeader(string $name, bool $all = false)
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{
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$name = mb_strtolower($name);
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$header = $this->headers[$name] ?? null;
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if (!$header) {
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return null;
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}
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if ($all) {
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return $header;
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}
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return array_pop($header);
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}
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public function withBody(string $body): Response
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{
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$clone = clone $this;
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$clone->body = $body;
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return $clone;
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}
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public function send(): void
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{
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http_response_code($this->code);
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foreach ($this->headers as $name => $values) {
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foreach ($values as $value) {
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header(sprintf('%s: %s', $name, $value));
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}
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}
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print $this->body;
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}
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}
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