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<?php |
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namespace UMA\Psr7Hmac\Internal; |
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use Psr\Http\Message\MessageInterface; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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final class MessageSerializer |
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{ |
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const SP = ' '; |
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const CRLF = "\r\n"; |
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/** |
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* Returns the string representation of an HTTP message. |
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* |
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* @param MessageInterface $message Message to convert to a string. |
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* |
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* @return string |
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* |
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* @throws \InvalidArgumentException When $message is neither an implementation |
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* of RequestInterface nor ResponseInterface. |
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*/ |
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public static function serialize(MessageInterface $message) |
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{ |
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return self::startLine($message).self::headers($message).self::CRLF.$message->getBody(); |
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} |
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private static function startLine(MessageInterface $message) |
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{ |
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if ($message instanceof RequestInterface) { |
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return self::requestLine($message); |
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} elseif ($message instanceof ResponseInterface) { |
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return self::statusLine($message); |
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} else { |
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throw new \InvalidArgumentException('Unknown message type'); |
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} |
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} |
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private static function headers(MessageInterface $message) |
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{ |
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$headers = array_change_key_case($message->getHeaders(), CASE_LOWER); |
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unset($headers['host']); |
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ksort($headers); |
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$msg = ''; |
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foreach ($headers as $name => $values) { |
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$values = is_array($values) ? |
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$values : [$values]; |
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$msg .= mb_strtolower($name).':'.self::SP.implode(',', $values).self::CRLF; |
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} |
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return $msg; |
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} |
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private static function requestLine(RequestInterface $request) |
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{ |
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$method = $request->getMethod(); |
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$target = self::fixTarget(trim($request->getRequestTarget())); |
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$protocol = 'HTTP/'.$request->getProtocolVersion(); |
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$host = $request->getUri()->getHost(); |
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return $method.self::SP.$target.self::SP.$protocol.self::CRLF."host: $host".self::CRLF; |
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} |
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private static function statusLine(ResponseInterface $response) |
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{ |
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$protocol = 'HTTP/'.$response->getProtocolVersion(); |
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$statusCode = $response->getStatusCode(); |
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$reasonPhrase = $response->getReasonPhrase(); |
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return $protocol.self::SP.$statusCode.self::SP.$reasonPhrase.self::CRLF; |
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} |
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private static function fixTarget($target) |
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{ |
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if (!array_key_exists('query', $parsedTarget = parse_url($target))) { |
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return $target; |
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} |
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parse_str($parsedTarget['query'], $query); |
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ksort($query); |
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return $parsedTarget['path'].'?'.http_build_query($query); |
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} |
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} |
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