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Editing: File.php
<?php // SPDX-FileCopyrightText: 2004-2023 Ryan Parman, Sam Sneddon, Ryan McCue // SPDX-License-Identifier: BSD-3-Clause declare(strict_types=1); namespace SimplePie; use SimplePie\HTTP\Response; /** * Used for fetching remote files and reading local files * * Supports HTTP 1.0 via cURL or fsockopen, with spotty HTTP 1.1 support * * This class can be overloaded with {@see \SimplePie\SimplePie::set_file_class()} * * @todo Move to properly supporting RFC2616 (HTTP/1.1) */ class File implements Response { /** * @var string The final URL after following all redirects * @deprecated Use `get_final_requested_uri()` method. */ public $url; /** * @var ?string User agent to use in requests * @deprecated Set the user agent in constructor. */ public $useragent; /** @var bool */ public $success = true; /** @var array<string, non-empty-array<string>> Canonical representation of headers */ private $parsed_headers = []; /** @var array<string, string> Last known value of $headers property (used to detect external modification) */ private $last_headers = []; /** * @var array<string, string> Headers as string for BC * @deprecated Use `get_headers()` method. */ public $headers = []; /** * @var ?string Body of the HTTP response * @deprecated Use `get_body_content()` method. */ public $body; /** * @var int Status code of the HTTP response * @deprecated Use `get_status_code()` method. */ public $status_code = 0; /** @var non-negative-int Number of redirect that were already performed during this request sequence. */ public $redirects = 0; /** @var ?string */ public $error; /** * @var int-mask-of<SimplePie::FILE_SOURCE_*> Bit mask representing the method used to fetch the file and whether it is a local file or remote file obtained over HTTP. * @deprecated Backend is implementation detail which you should not care about; to see if the file was retrieved over HTTP, check if `get_final_requested_uri()` with `Misc::is_remote_uri()`. */ public $method = \SimplePie\SimplePie::FILE_SOURCE_NONE; /** * @var string The permanent URL or the resource (first URL after the prefix of (only) permanent redirects) * @deprecated Use `get_permanent_uri()` method. */ public $permanent_url; /** @var bool Whether the permanent URL is still writeable (prefix of permanent redirects has not ended) */ private $permanentUrlMutable = true; /** * @param string $url * @param int $timeout * @param int $redirects * @param ?array<string, string> $headers * @param ?string $useragent * @param bool $force_fsockopen * @param array<int, mixed> $curl_options */ public function __construct(string $url, int $timeout = 10, int $redirects = 5, ?array $headers = null, ?string $useragent = null, bool $force_fsockopen = false, array $curl_options = []) { if (function_exists('idn_to_ascii')) { $parsed = \SimplePie\Misc::parse_url($url); if ($parsed['authority'] !== '' && !ctype_print($parsed['authority'])) { $authority = (string) \idn_to_ascii($parsed['authority'], \IDNA_NONTRANSITIONAL_TO_ASCII, \INTL_IDNA_VARIANT_UTS46); $url = \SimplePie\Misc::compress_parse_url($parsed['scheme'], $authority, $parsed['path'], $parsed['query'], null); } } $this->url = $url; if ($this->permanentUrlMutable) { $this->permanent_url = $url; } $this->useragent = $useragent; if (preg_match('/^http(s)?:\/\//i', $url)) { if ($useragent === null) { $useragent = (string) ini_get('user_agent'); $this->useragent = $useragent; } if (!is_array($headers)) { $headers = []; } if (!$force_fsockopen && function_exists('curl_exec')) { $this->method = \SimplePie\SimplePie::FILE_SOURCE_REMOTE | \SimplePie\SimplePie::FILE_SOURCE_CURL; $fp = curl_init(); $headers2 = []; foreach ($headers as $key => $value) { $headers2[] = "$key: $value"; } if (isset($curl_options[CURLOPT_HTTPHEADER])) { if (is_array($curl_options[CURLOPT_HTTPHEADER])) { $headers2 = array_merge($headers2, $curl_options[CURLOPT_HTTPHEADER]); } unset($curl_options[CURLOPT_HTTPHEADER]); } if (version_compare(\SimplePie\Misc::get_curl_version(), '7.10.5', '>=')) { curl_setopt($fp, CURLOPT_ENCODING, ''); } curl_setopt($fp, CURLOPT_URL, $url); curl_setopt($fp, CURLOPT_HEADER, 1); curl_setopt($fp, CURLOPT_RETURNTRANSFER, 1); curl_setopt($fp, CURLOPT_FAILONERROR, 1); curl_setopt($fp, CURLOPT_TIMEOUT, $timeout); curl_setopt($fp, CURLOPT_CONNECTTIMEOUT, $timeout); curl_setopt($fp, CURLOPT_REFERER, \SimplePie\Misc::url_remove_credentials($url)); curl_setopt($fp, CURLOPT_USERAGENT, $useragent); curl_setopt($fp, CURLOPT_HTTPHEADER, $headers2); foreach ($curl_options as $curl_param => $curl_value) { curl_setopt($fp, $curl_param, $curl_value); } $responseHeaders = curl_exec($fp); if (curl_errno($fp) === CURLE_WRITE_ERROR || curl_errno($fp) === CURLE_BAD_CONTENT_ENCODING) { curl_setopt($fp, CURLOPT_ENCODING, 'none'); $responseHeaders = curl_exec($fp); } $this->status_code = curl_getinfo($fp, CURLINFO_HTTP_CODE); if (curl_errno($fp)) { $this->error = 'cURL error ' . curl_errno($fp) . ': ' . curl_error($fp); $this->success = false; } else { // Use the updated url provided by curl_getinfo after any redirects. if ($info = curl_getinfo($fp)) { $this->url = $info['url']; } // For PHPStan: We already checked that error did not occur. assert(is_array($info) && $info['redirect_count'] >= 0); if (\PHP_VERSION_ID < 80000) { curl_close($fp); } $responseHeaders = \SimplePie\HTTP\Parser::prepareHeaders((string) $responseHeaders, $info['redirect_count'] + 1); $parser = new \SimplePie\HTTP\Parser($responseHeaders, true); if ($parser->parse()) { $this->set_headers($parser->headers); $this->body = $parser->body; $this->status_code = $parser->status_code; if ((in_array($this->status_code, [300, 301, 302, 303, 307]) || $this->status_code > 307 && $this->status_code < 400) && ($locationHeader = $this->get_header_line('location')) !== '' && $this->redirects < $redirects) { $this->redirects++; $location = \SimplePie\Misc::absolutize_url($locationHeader, $url); if ($location === false) { $this->error = "Invalid redirect location, trying to base “{$locationHeader}” onto “{$url}”"; $this->success = false; return; } $this->permanentUrlMutable = $this->permanentUrlMutable && ($this->status_code == 301 || $this->status_code == 308); $this->__construct($location, $timeout, $redirects, $headers, $useragent, $force_fsockopen, $curl_options); return; } } } } else { $this->method = \SimplePie\SimplePie::FILE_SOURCE_REMOTE | \SimplePie\SimplePie::FILE_SOURCE_FSOCKOPEN; if (($url_parts = parse_url($url)) === false) { throw new \InvalidArgumentException('Malformed URL: ' . $url); } if (!isset($url_parts['host'])) { throw new \InvalidArgumentException('Missing hostname: ' . $url); } $socket_host = $url_parts['host']; if (isset($url_parts['scheme']) && strtolower($url_parts['scheme']) === 'https') { $socket_host = 'ssl://' . $socket_host; $url_parts['port'] = 443; } if (!isset($url_parts['port'])) { $url_parts['port'] = 80; } $fp = @fsockopen($socket_host, $url_parts['port'], $errno, $errstr, $timeout); if (!$fp) { $this->error = 'fsockopen error: ' . $errstr; $this->success = false; } else { stream_set_timeout($fp, $timeout); if (isset($url_parts['path'])) { if (isset($url_parts['query'])) { $get = "$url_parts[path]?$url_parts[query]"; } else { $get = $url_parts['path']; } } else { $get = '/'; } $out = "GET $get HTTP/1.1\r\n"; $out .= "Host: $url_parts[host]\r\n"; $out .= "User-Agent: $useragent\r\n"; if (extension_loaded('zlib')) { $out .= "Accept-Encoding: x-gzip,gzip,deflate\r\n"; } if (isset($url_parts['user']) && isset($url_parts['pass'])) { $out .= "Authorization: Basic " . base64_encode("$url_parts[user]:$url_parts[pass]") . "\r\n"; } foreach ($headers as $key => $value) { $out .= "$key: $value\r\n"; } $out .= "Connection: Close\r\n\r\n"; fwrite($fp, $out); $info = stream_get_meta_data($fp); $responseHeaders = ''; while (!$info['eof'] && !$info['timed_out']) { $responseHeaders .= fread($fp, 1160); $info = stream_get_meta_data($fp); } if (!$info['timed_out']) { $parser = new \SimplePie\HTTP\Parser($responseHeaders, true); if ($parser->parse()) { $this->set_headers($parser->headers); $this->body = $parser->body; $this->status_code = $parser->status_code; if ((in_array($this->status_code, [300, 301, 302, 303, 307]) || $this->status_code > 307 && $this->status_code < 400) && ($locationHeader = $this->get_header_line('location')) !== '' && $this->redirects < $redirects) { $this->redirects++; $location = \SimplePie\Misc::absolutize_url($locationHeader, $url); $this->permanentUrlMutable = $this->permanentUrlMutable && ($this->status_code == 301 || $this->status_code == 308); if ($location === false) { $this->error = "Invalid redirect location, trying to base “{$locationHeader}” onto “{$url}”"; $this->success = false; return; } $this->__construct($location, $timeout, $redirects, $headers, $useragent, $force_fsockopen, $curl_options); return; } if (($contentEncodingHeader = $this->get_header_line('content-encoding')) !== '') { // Hey, we act dumb elsewhere, so let's do that here too switch (strtolower(trim($contentEncodingHeader, "\x09\x0A\x0D\x20"))) { case 'gzip': case 'x-gzip': if (($decompressed = gzdecode($this->body)) === false) { $this->error = 'Unable to decode HTTP "gzip" stream'; $this->success = false; } else { $this->body = $decompressed; } break; case 'deflate': if (($decompressed = gzinflate($this->body)) !== false) { $this->body = $decompressed; } elseif (($decompressed = gzuncompress($this->body)) !== false) { $this->body = $decompressed; } elseif (($decompressed = gzdecode($this->body)) !== false) { $this->body = $decompressed; } else { $this->error = 'Unable to decode HTTP "deflate" stream'; $this->success = false; } break; default: $this->error = 'Unknown content coding'; $this->success = false; } } } } else { $this->error = 'fsocket timed out'; $this->success = false; } fclose($fp); } } } else { $this->method = \SimplePie\SimplePie::FILE_SOURCE_LOCAL | \SimplePie\SimplePie::FILE_SOURCE_FILE_GET_CONTENTS; if (empty($url) || !is_readable($url) || false === $filebody = file_get_contents($url)) { $this->body = ''; $this->error = sprintf('file "%s" is not readable', $url); $this->success = false; } else { $this->body = $filebody; $this->status_code = 200; } } if ($this->success) { assert($this->body !== null); // For PHPStan // Leading whitespace may cause XML parsing errors (XML declaration cannot be preceded by anything other than BOM) so we trim it. // Note that unlike built-in `trim` function’s default settings, we do not trim `\x00` to avoid breaking characters in UTF-16 or UTF-32 encoded strings. // We also only do that when the whitespace is followed by `<`, so that we do not break e.g. UTF-16LE encoded whitespace like `\n\x00` in half. $this->body = preg_replace('/^[ \n\r\t\v]+</', '<', $this->body); } } public function get_permanent_uri(): string { return (string) $this->permanent_url; } public function get_final_requested_uri(): string { return (string) $this->url; } public function get_status_code(): int { return (int) $this->status_code; } public function get_headers(): array { $this->maybe_update_headers(); return $this->parsed_headers; } public function has_header(string $name): bool { $this->maybe_update_headers(); return $this->get_header($name) !== []; } public function get_header(string $name): array { $this->maybe_update_headers(); return $this->parsed_headers[strtolower($name)] ?? []; } public function with_header(string $name, $value) { $this->maybe_update_headers(); $new = clone $this; $newHeader = [ strtolower($name) => (array) $value, ]; $new->set_headers($newHeader + $this->get_headers()); return $new; } public function get_header_line(string $name): string { $this->maybe_update_headers(); return implode(', ', $this->get_header($name)); } public function get_body_content(): string { return (string) $this->body; } /** * Check if the $headers property was changed and update the internal state accordingly. */ private function maybe_update_headers(): void { if ($this->headers !== $this->last_headers) { $this->parsed_headers = array_map( function (string $header_line): array { if (strpos($header_line, ',') === false) { return [$header_line]; } else { return array_map('trim', explode(',', $header_line)); } }, $this->headers ); } $this->last_headers = $this->headers; } /** * Sets headers internally. * * @param array<string, non-empty-array<string>> $headers */ private function set_headers(array $headers): void { $this->parsed_headers = $headers; $this->headers = self::flatten_headers($headers); $this->last_headers = $this->headers; } /** * Converts PSR-7 compatible headers into a legacy format. * * @param array<string, non-empty-array<string>> $headers * * @return array<string, string> */ private function flatten_headers(array $headers): array { return array_map(function (array $values): string { return implode(',', $values); }, $headers); } /** * Create a File instance from another Response * * For BC reasons in some places there MUST be a `File` instance * instead of a `Response` implementation * * @see Locator::__construct() * @internal */ final public static function fromResponse(Response $response): self { $headers = []; foreach ($response->get_headers() as $name => $header) { $headers[$name] = implode(', ', $header); } /** @var File */ $file = (new \ReflectionClass(File::class))->newInstanceWithoutConstructor(); $file->url = $response->get_final_requested_uri(); $file->useragent = null; $file->headers = $headers; $file->body = $response->get_body_content(); $file->status_code = $response->get_status_code(); $file->permanent_url = $response->get_permanent_uri(); return $file; } } class_alias('SimplePie\File', 'SimplePie_File');
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