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libraries/vendor/laminas/laminas-diactoros/src/RequestTrait.php
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315
libraries/vendor/laminas/laminas-diactoros/src/RequestTrait.php
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<?php
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declare(strict_types=1);
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namespace Laminas\Diactoros;
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use Psr\Http\Message\RequestInterface;
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use Psr\Http\Message\StreamInterface;
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use Psr\Http\Message\UriInterface;
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use function array_keys;
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use function gettype;
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use function is_object;
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use function is_string;
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use function preg_match;
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use function sprintf;
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use function strtolower;
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/**
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* Trait with common request behaviors.
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*
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* Server and client-side requests differ slightly in how the Host header is
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* handled; on client-side, it should be calculated on-the-fly from the
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* composed URI (if present), while on server-side, it will be calculated from
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* the environment. As such, this trait exists to provide the common code
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* between both client-side and server-side requests, and each can then
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* use the headers functionality required by their implementations.
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*/
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trait RequestTrait
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{
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use MessageTrait;
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/** @var string */
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private $method = 'GET';
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/**
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* The request-target, if it has been provided or calculated.
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*
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* @var null|string
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*/
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private $requestTarget;
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/** @var UriInterface */
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private $uri;
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/**
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* Initialize request state.
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*
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* Used by constructors.
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*
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* @param null|string|UriInterface $uri URI for the request, if any.
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* @param null|string $method HTTP method for the request, if any.
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* @param string|resource|StreamInterface $body Message body, if any.
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* @param array $headers Headers for the message, if any.
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* @throws Exception\InvalidArgumentException For any invalid value.
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*/
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private function initialize(
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$uri = null,
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?string $method = null,
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$body = 'php://memory',
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array $headers = []
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): void {
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if ($method !== null) {
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$this->setMethod($method);
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}
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$this->uri = $this->createUri($uri);
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$this->stream = $this->getStream($body, 'wb+');
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$this->setHeaders($headers);
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// per PSR-7: attempt to set the Host header from a provided URI if no
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// Host header is provided
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if (! $this->hasHeader('Host') && $this->uri->getHost()) {
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$this->headerNames['host'] = 'Host';
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$this->headers['Host'] = [$this->getHostFromUri()];
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}
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}
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/**
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* Create and return a URI instance.
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*
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* If `$uri` is a already a `UriInterface` instance, returns it.
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*
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* If `$uri` is a string, passes it to the `Uri` constructor to return an
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* instance.
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*
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* If `$uri is null, creates and returns an empty `Uri` instance.
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*
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* Otherwise, it raises an exception.
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*
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* @param null|string|UriInterface $uri
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* @throws Exception\InvalidArgumentException
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*/
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private function createUri($uri): UriInterface
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{
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if ($uri instanceof UriInterface) {
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return $uri;
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}
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if (is_string($uri)) {
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return new Uri($uri);
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}
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if ($uri === null) {
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return new Uri();
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}
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throw new Exception\InvalidArgumentException(
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'Invalid URI provided; must be null, a string, or a Psr\Http\Message\UriInterface instance'
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);
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}
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/**
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* Retrieves the message's request target.
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*
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* Retrieves the message's request-target either as it will appear (for
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* clients), as it appeared at request (for servers), or as it was
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* specified for the instance (see withRequestTarget()).
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*
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* In most cases, this will be the origin-form of the composed URI,
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* unless a value was provided to the concrete implementation (see
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* withRequestTarget() below).
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*
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* If no URI is available, and no request-target has been specifically
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* provided, this method MUST return the string "/".
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*/
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public function getRequestTarget(): string
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{
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if (null !== $this->requestTarget) {
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return $this->requestTarget;
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}
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$target = $this->uri->getPath();
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if ($this->uri->getQuery()) {
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$target .= '?' . $this->uri->getQuery();
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}
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if (empty($target)) {
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$target = '/';
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}
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return $target;
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}
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/**
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* Create a new instance with a specific request-target.
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*
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* If the request needs a non-origin-form request-target — e.g., for
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* specifying an absolute-form, authority-form, or asterisk-form —
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* this method may be used to create an instance with the specified
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* request-target, verbatim.
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*
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* This method MUST be implemented in such a way as to retain the
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* immutability of the message, and MUST return a new instance that has the
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* changed request target.
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*
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* @link http://tools.ietf.org/html/rfc7230#section-2.7 (for the various
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* request-target forms allowed in request messages)
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*
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* @param string $requestTarget
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* @throws Exception\InvalidArgumentException If the request target is invalid.
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* @return static
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*/
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public function withRequestTarget($requestTarget): RequestInterface
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{
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if (preg_match('#\s#', $requestTarget)) {
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throw new Exception\InvalidArgumentException(
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'Invalid request target provided; cannot contain whitespace'
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);
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}
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$new = clone $this;
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$new->requestTarget = $requestTarget;
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return $new;
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}
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/**
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* Retrieves the HTTP method of the request.
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*
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* @return string Returns the request method.
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*/
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public function getMethod(): string
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{
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return $this->method;
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}
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/**
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* Return an instance with the provided HTTP method.
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*
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* While HTTP method names are typically all uppercase characters, HTTP
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* method names are case-sensitive and thus implementations SHOULD NOT
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* modify the given string.
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*
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* This method MUST be implemented in such a way as to retain the
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* immutability of the message, and MUST return an instance that has the
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* changed request method.
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*
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* @param string $method Case-insensitive method.
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* @throws Exception\InvalidArgumentException For invalid HTTP methods.
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* @return static
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*/
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public function withMethod($method): RequestInterface
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{
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$new = clone $this;
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$new->setMethod($method);
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return $new;
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}
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/**
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* Retrieves the URI instance.
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*
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* This method MUST return a UriInterface instance.
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*
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* @link http://tools.ietf.org/html/rfc3986#section-4.3
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*
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* @return UriInterface Returns a UriInterface instance
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* representing the URI of the request, if any.
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*/
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public function getUri(): UriInterface
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{
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return $this->uri;
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}
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/**
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* Returns an instance with the provided URI.
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*
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* This method will update the Host header of the returned request by
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* default if the URI contains a host component. If the URI does not
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* contain a host component, any pre-existing Host header will be carried
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* over to the returned request.
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*
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* You can opt-in to preserving the original state of the Host header by
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* setting `$preserveHost` to `true`. When `$preserveHost` is set to
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* `true`, the returned request will not update the Host header of the
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* returned message -- even if the message contains no Host header. This
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* means that a call to `getHeader('Host')` on the original request MUST
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* equal the return value of a call to `getHeader('Host')` on the returned
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* request.
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*
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* This method MUST be implemented in such a way as to retain the
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* immutability of the message, and MUST return an instance that has the
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* new UriInterface instance.
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*
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* @link http://tools.ietf.org/html/rfc3986#section-4.3
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*
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* @param UriInterface $uri New request URI to use.
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* @param bool $preserveHost Preserve the original state of the Host header.
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* @return static
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*/
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public function withUri(UriInterface $uri, $preserveHost = false): RequestInterface
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{
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$new = clone $this;
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$new->uri = $uri;
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if ($preserveHost && $this->hasHeader('Host')) {
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return $new;
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}
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if (! $uri->getHost()) {
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return $new;
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}
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$host = $uri->getHost();
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if ($uri->getPort()) {
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$host .= ':' . $uri->getPort();
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}
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$new->headerNames['host'] = 'Host';
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// Remove an existing host header if present, regardless of current
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// de-normalization of the header name.
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// @see https://github.com/zendframework/zend-diactoros/issues/91
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foreach (array_keys($new->headers) as $header) {
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if (strtolower($header) === 'host') {
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unset($new->headers[$header]);
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}
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}
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$new->headers['Host'] = [$host];
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return $new;
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}
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/**
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* Set and validate the HTTP method
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*
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* @param string $method
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* @throws Exception\InvalidArgumentException On invalid HTTP method.
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*/
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private function setMethod($method): void
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{
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if (! is_string($method)) {
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throw new Exception\InvalidArgumentException(sprintf(
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'Unsupported HTTP method; must be a string, received %s',
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is_object($method) ? $method::class : gettype($method)
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));
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}
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if (! preg_match('/^[!#$%&\'*+.^_`\|~0-9a-z-]+$/i', $method)) {
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throw new Exception\InvalidArgumentException(sprintf(
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'Unsupported HTTP method "%s" provided',
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$method
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));
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}
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$this->method = $method;
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}
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/**
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* Retrieve the host from the URI instance
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*/
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private function getHostFromUri(): string
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{
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$host = $this->uri->getHost();
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$host .= $this->uri->getPort() ? ':' . $this->uri->getPort() : '';
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return $host;
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}
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}
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