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<?php declare(strict_types=1); namespace GuzzleHttp\Psr7; use Psr\Http\Message\RequestInterface; use Psr\Http\Message\ServerRequestInterface; use Psr\Http\Message\StreamInterface; use Psr\Http\Message\UriInterface; final class Utils { /** * Remove the items given by the keys, case insensitively from the data. * * @param string[] $keys */ public static function caselessRemove(array $keys, array $data): array { $result = []; foreach ($keys as &$key) { $key = strtolower($key); } foreach ($data as $k => $v) { if (!is_string($k) || !in_array(strtolower($k), $keys)) { $result[$k] = $v; } } return $result; } /** * Copy the contents of a stream into another stream until the given number * of bytes have been read. * * @param StreamInterface $source Stream to read from * @param StreamInterface $dest Stream to write to * @param int $maxLen Maximum number of bytes to read. Pass -1 * to read the entire stream. * * @throws \RuntimeException on error. */ public static function copyToStream(StreamInterface $source, StreamInterface $dest, int $maxLen = -1): void { $bufferSize = 8192; if ($maxLen === -1) { while (!$source->eof()) { if (!$dest->write($source->read($bufferSize))) { break; } } } else { $remaining = $maxLen; while ($remaining > 0 && !$source->eof()) { $buf = $source->read(min($bufferSize, $remaining)); $len = strlen($buf); if (!$len) { break; } $remaining -= $len; $dest->write($buf); } } } /** * Copy the contents of a stream into a string until the given number of * bytes have been read. * * @param StreamInterface $stream Stream to read * @param int $maxLen Maximum number of bytes to read. Pass -1 * to read the entire stream. * * @throws \RuntimeException on error. */ public static function copyToString(StreamInterface $stream, int $maxLen = -1): string { $buffer = ''; if ($maxLen === -1) { while (!$stream->eof()) { $buf = $stream->read(1048576); if ($buf === '') { break; } $buffer .= $buf; } return $buffer; } $len = 0; while (!$stream->eof() && $len < $maxLen) { $buf = $stream->read($maxLen - $len); if ($buf === '') { break; } $buffer .= $buf; $len = strlen($buffer); } return $buffer; } /** * Calculate a hash of a stream. * * This method reads the entire stream to calculate a rolling hash, based * on PHP's `hash_init` functions. * * @param StreamInterface $stream Stream to calculate the hash for * @param string $algo Hash algorithm (e.g. md5, crc32, etc) * @param bool $rawOutput Whether or not to use raw output * * @throws \RuntimeException on error. */ public static function hash(StreamInterface $stream, string $algo, bool $rawOutput = false): string { $pos = $stream->tell(); if ($pos > 0) { $stream->rewind(); } $ctx = hash_init($algo); while (!$stream->eof()) { hash_update($ctx, $stream->read(1048576)); } $out = hash_final($ctx, $rawOutput); $stream->seek($pos); return $out; } /** * Clone and modify a request with the given changes. * * This method is useful for reducing the number of clones needed to mutate * a message. * * The changes can be one of: * - method: (string) Changes the HTTP method. * - set_headers: (array) Sets the given headers. * - remove_headers: (array) Remove the given headers. * - body: (mixed) Sets the given body. * - uri: (UriInterface) Set the URI. * - query: (string) Set the query string value of the URI. * - version: (string) Set the protocol version. * * @param RequestInterface $request Request to clone and modify. * @param array $changes Changes to apply. */ public static function modifyRequest(RequestInterface $request, array $changes): RequestInterface { if (!$changes) { return $request; } $headers = $request->getHeaders(); if (!isset($changes['uri'])) { $uri = $request->getUri(); } else { // Remove the host header if one is on the URI if ($host = $changes['uri']->getHost()) { $changes['set_headers']['Host'] = $host; if ($port = $changes['uri']->getPort()) { $standardPorts = ['http' => 80, 'https' => 443]; $scheme = $changes['uri']->getScheme(); if (isset($standardPorts[$scheme]) && $port != $standardPorts[$scheme]) { $changes['set_headers']['Host'] .= ':' . $port; } } } $uri = $changes['uri']; } if (!empty($changes['remove_headers'])) { $headers = self::caselessRemove($changes['remove_headers'], $headers); } if (!empty($changes['set_headers'])) { $headers = self::caselessRemove(array_keys($changes['set_headers']), $headers); $headers = $changes['set_headers'] + $headers; } if (isset($changes['query'])) { $uri = $uri->withQuery($changes['query']); } if ($request instanceof ServerRequestInterface) { $new = (new ServerRequest( $changes['method'] ?? $request->getMethod(), $uri, $headers, $changes['body'] ?? $request->getBody(), $changes['version'] ?? $request->getProtocolVersion(), $request->getServerParams() )) ->withParsedBody($request->getParsedBody()) ->withQueryParams($request->getQueryParams()) ->withCookieParams($request->getCookieParams()) ->withUploadedFiles($request->getUploadedFiles()); foreach ($request->getAttributes() as $key => $value) { $new = $new->withAttribute($key, $value); } return $new; } return new Request( $changes['method'] ?? $request->getMethod(), $uri, $headers, $changes['body'] ?? $request->getBody(), $changes['version'] ?? $request->getProtocolVersion() ); } /** * Read a line from the stream up to the maximum allowed buffer length. * * @param StreamInterface $stream Stream to read from * @param int|null $maxLength Maximum buffer length */ public static function readLine(StreamInterface $stream, ?int $maxLength = null): string { $buffer = ''; $size = 0; while (!$stream->eof()) { if ('' === ($byte = $stream->read(1))) { return $buffer; } $buffer .= $byte; // Break when a new line is found or the max length - 1 is reached if ($byte === "\n" || ++$size === $maxLength - 1) { break; } } return $buffer; } /** * Create a new stream based on the input type. * * Options is an associative array that can contain the following keys: * - metadata: Array of custom metadata. * - size: Size of the stream. * * This method accepts the following `$resource` types: * - `Psr\Http\Message\StreamInterface`: Returns the value as-is. * - `string`: Creates a stream object that uses the given string as the contents. * - `resource`: Creates a stream object that wraps the given PHP stream resource. * - `Iterator`: If the provided value implements `Iterator`, then a read-only * stream object will be created that wraps the given iterable. Each time the * stream is read from, data from the iterator will fill a buffer and will be * continuously called until the buffer is equal to the requested read size. * Subsequent read calls will first read from the buffer and then call `next` * on the underlying iterator until it is exhausted. * - `object` with `__toString()`: If the object has the `__toString()` method, * the object will be cast to a string and then a stream will be returned that * uses the string value. * - `NULL`: When `null` is passed, an empty stream object is returned. * - `callable` When a callable is passed, a read-only stream object will be * created that invokes the given callable. The callable is invoked with the * number of suggested bytes to read. The callable can return any number of * bytes, but MUST return `false` when there is no more data to return. The * stream object that wraps the callable will invoke the callable until the * number of requested bytes are available. Any additional bytes will be * buffered and used in subsequent reads. * * @param resource|string|int|float|bool|StreamInterface|callable|\Iterator|null $resource Entity body data * @param array{size?: int, metadata?: array} $options Additional options * * @throws \InvalidArgumentException if the $resource arg is not valid. */ public static function streamFor($resource = '', array $options = []): StreamInterface { if (is_scalar($resource)) { $stream = self::tryFopen('php://temp', 'r+'); if ($resource !== '') { fwrite($stream, (string) $resource); fseek($stream, 0); } return new Stream($stream, $options); } switch (gettype($resource)) { case 'resource': /* * The 'php://input' is a special stream with quirks and inconsistencies. * We avoid using that stream by reading it into php://temp */ /** @var resource $resource */ if ((\stream_get_meta_data($resource)['uri'] ?? '') === 'php://input') { $stream = self::tryFopen('php://temp', 'w+'); stream_copy_to_stream($resource, $stream); fseek($stream, 0); $resource = $stream; } return new Stream($resource, $options); case 'object': /** @var object $resource */ if ($resource instanceof StreamInterface) { return $resource; } elseif ($resource instanceof \Iterator) { return new PumpStream(function () use ($resource) { if (!$resource->valid()) { return false; } $result = $resource->current(); $resource->next(); return $result; }, $options); } elseif (method_exists($resource, '__toString')) { return self::streamFor((string) $resource, $options); } break; case 'NULL': return new Stream(self::tryFopen('php://temp', 'r+'), $options); } if (is_callable($resource)) { return new PumpStream($resource, $options); } throw new \InvalidArgumentException('Invalid resource type: ' . gettype($resource)); } /** * Safely opens a PHP stream resource using a filename. * * When fopen fails, PHP normally raises a warning. This function adds an * error handler that checks for errors and throws an exception instead. * * @param string $filename File to open * @param string $mode Mode used to open the file * * @return resource * * @throws \RuntimeException if the file cannot be opened */ public static function tryFopen(string $filename, string $mode) { $ex = null; set_error_handler(static function (int $errno, string $errstr) use ($filename, $mode, &$ex): bool { $ex = new \RuntimeException(sprintf( 'Unable to open "%s" using mode "%s": %s', $filename, $mode, $errstr )); return true; }); try { /** @var resource $handle */ $handle = fopen($filename, $mode); } catch (\Throwable $e) { $ex = new \RuntimeException(sprintf( 'Unable to open "%s" using mode "%s": %s', $filename, $mode, $e->getMessage() ), 0, $e); } restore_error_handler(); if ($ex) { /** @var $ex \RuntimeException */ throw $ex; } return $handle; } /** * Safely gets the contents of a given stream. * * When stream_get_contents fails, PHP normally raises a warning. This * function adds an error handler that checks for errors and throws an * exception instead. * * @param resource $stream * * @throws \RuntimeException if the stream cannot be read */ public static function tryGetContents($stream): string { $ex = null; set_error_handler(static function (int $errno, string $errstr) use (&$ex): bool { $ex = new \RuntimeException(sprintf( 'Unable to read stream contents: %s', $errstr )); return true; }); try { /** @var string|false $contents */ $contents = stream_get_contents($stream); if ($contents === false) { $ex = new \RuntimeException('Unable to read stream contents'); } } catch (\Throwable $e) { $ex = new \RuntimeException(sprintf( 'Unable to read stream contents: %s', $e->getMessage() ), 0, $e); } restore_error_handler(); if ($ex) { /** @var $ex \RuntimeException */ throw $ex; } return $contents; } /** * Returns a UriInterface for the given value. * * This function accepts a string or UriInterface and returns a * UriInterface for the given value. If the value is already a * UriInterface, it is returned as-is. * * @param string|UriInterface $uri * * @throws \InvalidArgumentException */ public static function uriFor($uri): UriInterface { if ($uri instanceof UriInterface) { return $uri; } if (is_string($uri)) { return new Uri($uri); } throw new \InvalidArgumentException('URI must be a string or UriInterface'); } }