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<?php
declare(strict_types=1);
namespace Nyholm\Psr7;
use Psr\Http\Message\MessageInterface;
use Psr\Http\Message\StreamInterface;
/**
* Trait implementing functionality common to requests and responses.
*
* @author Michael Dowling and contributors to guzzlehttp/psr7
* @author Tobias Nyholm <tobias.nyholm@gmail.com>
* @author Martijn van der Ven <martijn@vanderven.se>
*
* @internal should not be used outside of Nyholm/Psr7 as it does not fall under our BC promise
*/
trait MessageTrait
{
/** @var array Map of all registered headers, as original name => array of values */
private $headers = [];
/** @var array Map of lowercase header name => original name at registration */
private $headerNames = [];
/** @var string */
private $protocol = '1.1';
/** @var StreamInterface|null */
private $stream;
public function getProtocolVersion(): string
{
return $this->protocol;
}
/**
* @return static
*/
public function withProtocolVersion($version): MessageInterface
{
if (!\is_scalar($version)) {
throw new \InvalidArgumentException('Protocol version must be a string');
}
if ($this->protocol === $version) {
return $this;
}
$new = clone $this;
$new->protocol = (string) $version;
return $new;
}
public function getHeaders(): array
{
return $this->headers;
}
public function hasHeader($header): bool
{
return isset($this->headerNames[\strtr($header, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz')]);
}
public function getHeader($header): array
{
if (!\is_string($header)) {
throw new \InvalidArgumentException('Header name must be an RFC 7230 compatible string');
}
$header = \strtr($header, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz');
if (!isset($this->headerNames[$header])) {
return [];
}
$header = $this->headerNames[$header];
return $this->headers[$header];
}
public function getHeaderLine($header): string
{
return \implode(', ', $this->getHeader($header));
}
/**
* @return static
*/
public function withHeader($header, $value): MessageInterface
{
$value = $this->validateAndTrimHeader($header, $value);
$normalized = \strtr($header, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz');
$new = clone $this;
if (isset($new->headerNames[$normalized])) {
unset($new->headers[$new->headerNames[$normalized]]);
}
$new->headerNames[$normalized] = $header;
$new->headers[$header] = $value;
return $new;
}
/**
* @return static
*/
public function withAddedHeader($header, $value): MessageInterface
{
if (!\is_string($header) || '' === $header) {
throw new \InvalidArgumentException('Header name must be an RFC 7230 compatible string');
}
$new = clone $this;
$new->setHeaders([$header => $value]);
return $new;
}
/**
* @return static
*/
public function withoutHeader($header): MessageInterface
{
if (!\is_string($header)) {
throw new \InvalidArgumentException('Header name must be an RFC 7230 compatible string');
}
$normalized = \strtr($header, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz');
if (!isset($this->headerNames[$normalized])) {
return $this;
}
$header = $this->headerNames[$normalized];
$new = clone $this;
unset($new->headers[$header], $new->headerNames[$normalized]);
return $new;
}
public function getBody(): StreamInterface
{
if (null === $this->stream) {
$this->stream = Stream::create('');
}
return $this->stream;
}
/**
* @return static
*/
public function withBody(StreamInterface $body): MessageInterface
{
if ($body === $this->stream) {
return $this;
}
$new = clone $this;
$new->stream = $body;
return $new;
}
private function setHeaders(array $headers): void
{
foreach ($headers as $header => $value) {
if (\is_int($header)) {
// If a header name was set to a numeric string, PHP will cast the key to an int.
// We must cast it back to a string in order to comply with validation.
$header = (string) $header;
}
$value = $this->validateAndTrimHeader($header, $value);
$normalized = \strtr($header, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz');
if (isset($this->headerNames[$normalized])) {
$header = $this->headerNames[$normalized];
$this->headers[$header] = \array_merge($this->headers[$header], $value);
} else {
$this->headerNames[$normalized] = $header;
$this->headers[$header] = $value;
}
}
}
/**
* Make sure the header complies with RFC 7230.
*
* Header names must be a non-empty string consisting of token characters.
*
* Header values must be strings consisting of visible characters with all optional
* leading and trailing whitespace stripped. This method will always strip such
* optional whitespace. Note that the method does not allow folding whitespace within
* the values as this was deprecated for almost all instances by the RFC.
*
* header-field = field-name ":" OWS field-value OWS
* field-name = 1*( "!" / "#" / "$" / "%" / "&" / "'" / "*" / "+" / "-" / "." / "^"
* / "_" / "`" / "|" / "~" / %x30-39 / ( %x41-5A / %x61-7A ) )
* OWS = *( SP / HTAB )
* field-value = *( ( %x21-7E / %x80-FF ) [ 1*( SP / HTAB ) ( %x21-7E / %x80-FF ) ] )
*
* @see https://tools.ietf.org/html/rfc7230#section-3.2.4
*/
private function validateAndTrimHeader($header, $values): array
{
if (!\is_string($header) || 1 !== \preg_match("@^[!#$%&'*+.^_`|~0-9A-Za-z-]+$@D", $header)) {
throw new \InvalidArgumentException('Header name must be an RFC 7230 compatible string');
}
if (!\is_array($values)) {
// This is simple, just one value.
if ((!\is_numeric($values) && !\is_string($values)) || 1 !== \preg_match("@^[ \t\x21-\x7E\x80-\xFF]*$@", (string) $values)) {
throw new \InvalidArgumentException('Header values must be RFC 7230 compatible strings');
}
return [\trim((string) $values, " \t")];
}
if (empty($values)) {
throw new \InvalidArgumentException('Header values must be a string or an array of strings, empty array given');
}
// Assert Non empty array
$returnValues = [];
foreach ($values as $v) {
if ((!\is_numeric($v) && !\is_string($v)) || 1 !== \preg_match("@^[ \t\x21-\x7E\x80-\xFF]*$@D", (string) $v)) {
throw new \InvalidArgumentException('Header values must be RFC 7230 compatible strings');
}
$returnValues[] = \trim((string) $v, " \t");
}
return $returnValues;
}
}
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