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<?php
namespace Algolia\AlgoliaSearch\Http\Psr7;
use Psr\Http\Message\UriInterface;
/**
* PSR-7 URI implementation based on the work of:.
*
* @author Michael Dowling
* @author Tobias Schultze
* @author Matthew Weier O'Phinney
*
* Adapted for PHP 5.3 by Algolia.
*
* @internal
*/
class Uri implements UriInterface
{
/**
* Absolute http and https URIs require a host per RFC 7230 Section 2.7
* but in generic URIs the host can be empty. So for http(s) URIs
* we apply this default host when no host is given yet to form a
* valid URI.
*/
const HTTP_DEFAULT_HOST = 'localhost';
private static $defaultPorts = [
'http' => 80,
'https' => 443,
'ftp' => 21,
'gopher' => 70,
'nntp' => 119,
'news' => 119,
'telnet' => 23,
'tn3270' => 23,
'imap' => 143,
'pop' => 110,
'ldap' => 389,
];
private static $charUnreserved = 'a-zA-Z0-9_\-\.~';
private static $charSubDelims = '!\$&\'\(\)\*\+,;=';
private static $replaceQuery = ['=' => '%3D', '&' => '%26'];
/** @var string Uri scheme. */
private $scheme = '';
/** @var string Uri user info. */
private $userInfo = '';
/** @var string Uri host. */
private $host = '';
/** @var int|null Uri port. */
private $port;
/** @var string Uri path. */
private $path = '';
/** @var string Uri query string. */
private $query = '';
/** @var string Uri fragment. */
private $fragment = '';
/**
* @param string $uri URI to parse
*/
public function __construct($uri = '')
{
// weak type check to also accept null until we can add scalar type hints
if ('' != $uri) {
$parts = parse_url($uri);
if (false === $parts) {
throw new \InvalidArgumentException("Unable to parse URI: $uri");
}
$this->applyParts($parts);
}
}
public function __toString()
{
return self::composeComponents(
$this->scheme,
$this->getAuthority(),
$this->path,
$this->query,
$this->fragment
);
}
/**
* Composes a URI reference string from its various components.
*
* Usually this method does not need to be called manually but instead is used indirectly via
* `Psr\Http\Message\UriInterface::__toString`.
*
* PSR-7 UriInterface treats an empty component the same as a missing component as
* getQuery(), getFragment() etc. always return a string. This explains the slight
* difference to RFC 3986 Section 5.3.
*
* Another adjustment is that the authority separator is added even when the authority is missing/empty
* for the "file" scheme. This is because PHP stream functions like `file_get_contents` only work with
* `file:///myfile` but not with `file:/myfile` although they are equivalent according to RFC 3986. But
* `file:///` is the more common syntax for the file scheme anyway (Chrome for example redirects to
* that format).
*
* @param string $scheme
* @param string $authority
* @param string $path
* @param string $query
* @param string $fragment
*
* @return string
*
* @see https://tools.ietf.org/html/rfc3986#section-5.3
*/
public static function composeComponents($scheme, $authority, $path, $query, $fragment)
{
$uri = '';
// weak type checks to also accept null until we can add scalar type hints
if ('' != $scheme) {
$uri .= $scheme.':';
}
if ('' != $authority || 'file' === $scheme) {
$uri .= '//'.$authority;
}
$uri .= $path;
if ('' != $query) {
$uri .= '?'.$query;
}
if ('' != $fragment) {
$uri .= '#'.$fragment;
}
return $uri;
}
/**
* Whether the URI has the default port of the current scheme.
*
* `Psr\Http\Message\UriInterface::getPort` may return null or the standard port. This method can be used
* independently of the implementation.
*
* @return bool
*/
public static function isDefaultPort(UriInterface $uri)
{
return null === $uri->getPort()
|| (isset(self::$defaultPorts[$uri->getScheme()]) && $uri->getPort() === self::$defaultPorts[$uri->getScheme()]);
}
/**
* Whether the URI is absolute, i.e. it has a scheme.
*
* An instance of UriInterface can either be an absolute URI or a relative reference. This method returns true
* if it is the former. An absolute URI has a scheme. A relative reference is used to express a URI relative
* to another URI, the base URI. Relative references can be divided into several forms:
* - network-path references, e.g. '//example.com/path'
* - absolute-path references, e.g. '/path'
* - relative-path references, e.g. 'subpath'
*
* @return bool
*
* @see Uri::isNetworkPathReference
* @see Uri::isAbsolutePathReference
* @see Uri::isRelativePathReference
* @see https://tools.ietf.org/html/rfc3986#section-4
*/
public static function isAbsolute(UriInterface $uri)
{
return '' !== $uri->getScheme();
}
/**
* Whether the URI is a network-path reference.
*
* A relative reference that begins with two slash characters is termed an network-path reference.
*
* @return bool
*
* @see https://tools.ietf.org/html/rfc3986#section-4.2
*/
public static function isNetworkPathReference(UriInterface $uri)
{
return '' === $uri->getScheme() && '' !== $uri->getAuthority();
}
/**
* Whether the URI is a absolute-path reference.
*
* A relative reference that begins with a single slash character is termed an absolute-path reference.
*
* @return bool
*
* @see https://tools.ietf.org/html/rfc3986#section-4.2
*/
public static function isAbsolutePathReference(UriInterface $uri)
{
$path = $uri->getPath();
return '' === $uri->getScheme()
&& '' === $uri->getAuthority()
&& isset($path[0])
&& '/' === $path[0];
}
/**
* Whether the URI is a relative-path reference.
*
* A relative reference that does not begin with a slash character is termed a relative-path reference.
*
* @return bool
*
* @see https://tools.ietf.org/html/rfc3986#section-4.2
*/
public static function isRelativePathReference(UriInterface $uri)
{
$path = $uri->getPath();
return '' === $uri->getScheme()
&& '' === $uri->getAuthority()
&& (!isset($path[0]) || '/' !== $path[0]);
}
/**
* Whether the URI is a same-document reference.
*
* A same-document reference refers to a URI that is, aside from its fragment
* component, identical to the base URI. When no base URI is given, only an empty
* URI reference (apart from its fragment) is considered a same-document reference.
*
* @param UriInterface $uri The URI to check
* @param UriInterface|null $base An optional base URI to compare against
*
* @return bool
*
* @see https://tools.ietf.org/html/rfc3986#section-4.4
*/
public static function isSameDocumentReference(UriInterface $uri, UriInterface $base = null)
{
if (null !== $base) {
$uri = UriResolver::resolve($base, $uri);
return ($uri->getScheme() === $base->getScheme())
&& ($uri->getAuthority() === $base->getAuthority())
&& ($uri->getPath() === $base->getPath())
&& ($uri->getQuery() === $base->getQuery());
}
return '' === $uri->getScheme() && '' === $uri->getAuthority() && '' === $uri->getPath() && '' === $uri->getQuery();
}
/**
* Removes dot segments from a path and returns the new path.
*
* @param string $path
*
* @return string
*
* @deprecated since version 1.4. Use UriResolver::removeDotSegments instead.
* @see UriResolver::removeDotSegments
*/
public static function removeDotSegments($path)
{
return UriResolver::removeDotSegments($path);
}
/**
* Converts the relative URI into a new URI that is resolved against the base URI.
*
* @param UriInterface $base Base URI
* @param string|UriInterface $rel Relative URI
*
* @return UriInterface
*
* @deprecated since version 1.4. Use UriResolver::resolve instead.
* @see UriResolver::resolve
*/
public static function resolve(UriInterface $base, $rel)
{
if (!($rel instanceof UriInterface)) {
$rel = new self($rel);
}
return UriResolver::resolve($base, $rel);
}
/**
* Creates a new URI with a specific query string value removed.
*
* Any existing query string values that exactly match the provided key are
* removed.
*
* @param uriInterface $uri URI to use as a base
* @param string $key query string key to remove
*
* @return UriInterface
*/
public static function withoutQueryValue(UriInterface $uri, $key)
{
$current = $uri->getQuery();
if ('' === $current) {
return $uri;
}
$decodedKey = rawurldecode($key);
$result = array_filter(explode('&', $current), function ($part) use ($decodedKey) {
$parts = explode('=', $part);
return rawurldecode($parts[0]) !== $decodedKey;
});
return $uri->withQuery(implode('&', $result));
}
/**
* Creates a new URI with a specific query string value.
*
* Any existing query string values that exactly match the provided key are
* removed and replaced with the given key value pair.
*
* A value of null will set the query string key without a value, e.g. "key"
* instead of "key=value".
*
* @param UriInterface $uri URI to use as a base
* @param string $key key to set
* @param string|null $value Value to set
*
* @return UriInterface
*/
public static function withQueryValue(UriInterface $uri, $key, $value)
{
$current = $uri->getQuery();
if ('' === $current) {
$result = [];
} else {
$decodedKey = rawurldecode($key);
$result = array_filter(explode('&', $current), function ($part) use ($decodedKey) {
$parts = explode('=', $part);
return rawurldecode($parts[0]) !== $decodedKey;
});
}
// Query string separators ("=", "&") within the key or value need to be encoded
// (while preventing double-encoding) before setting the query string. All other
// chars that need percent-encoding will be encoded by withQuery().
$key = strtr($key, self::$replaceQuery);
if (null !== $value) {
$result[] = $key.'='.strtr($value, self::$replaceQuery);
} else {
$result[] = $key;
}
return $uri->withQuery(implode('&', $result));
}
/**
* Creates a URI from a hash of `parse_url` components.
*
* @return UriInterface
*
* @see http://php.net/manual/en/function.parse-url.php
*
* @throws \InvalidArgumentException if the components do not form a valid URI
*/
public static function fromParts(array $parts)
{
$uri = new self();
$uri->applyParts($parts);
$uri->validateState();
return $uri;
}
public function getScheme()
{
return $this->scheme;
}
public function getAuthority()
{
$authority = $this->host;
if ('' !== $this->userInfo) {
$authority = $this->userInfo.'@'.$authority;
}
if (null !== $this->port) {
$authority .= ':'.$this->port;
}
return $authority;
}
public function getUserInfo()
{
return $this->userInfo;
}
public function getHost()
{
return $this->host;
}
public function getPort()
{
return $this->port;
}
public function getPath()
{
return $this->path;
}
public function getQuery()
{
return $this->query;
}
public function getFragment()
{
return $this->fragment;
}
public function withScheme($scheme)
{
$scheme = $this->filterScheme($scheme);
if ($this->scheme === $scheme) {
return $this;
}
$new = clone $this;
$new->scheme = $scheme;
$new->removeDefaultPort();
$new->validateState();
return $new;
}
public function withUserInfo($user, $password = null)
{
$info = $user;
if ('' != $password) {
$info .= ':'.$password;
}
if ($this->userInfo === $info) {
return $this;
}
$new = clone $this;
$new->userInfo = $info;
$new->validateState();
return $new;
}
public function withHost($host)
{
$host = $this->filterHost($host);
if ($this->host === $host) {
return $this;
}
$new = clone $this;
$new->host = $host;
$new->validateState();
return $new;
}
public function withPort($port)
{
$port = $this->filterPort($port);
if ($this->port === $port) {
return $this;
}
$new = clone $this;
$new->port = $port;
$new->removeDefaultPort();
$new->validateState();
return $new;
}
public function withPath($path)
{
$path = $this->filterPath($path);
if ($this->path === $path) {
return $this;
}
$new = clone $this;
$new->path = $path;
$new->validateState();
return $new;
}
public function withQuery($query)
{
$query = $this->filterQueryAndFragment($query);
if ($this->query === $query) {
return $this;
}
$new = clone $this;
$new->query = $query;
return $new;
}
public function withFragment($fragment)
{
$fragment = $this->filterQueryAndFragment($fragment);
if ($this->fragment === $fragment) {
return $this;
}
$new = clone $this;
$new->fragment = $fragment;
return $new;
}
/**
* Apply parse_url parts to a URI.
*
* @param array $parts array of parse_url parts to apply
*/
private function applyParts(array $parts)
{
$this->scheme = isset($parts['scheme'])
? $this->filterScheme($parts['scheme'])
: '';
$this->userInfo = isset($parts['user']) ? $parts['user'] : '';
$this->host = isset($parts['host'])
? $this->filterHost($parts['host'])
: '';
$this->port = isset($parts['port'])
? $this->filterPort($parts['port'])
: null;
$this->path = isset($parts['path'])
? $this->filterPath($parts['path'])
: '';
$this->query = isset($parts['query'])
? $this->filterQueryAndFragment($parts['query'])
: '';
$this->fragment = isset($parts['fragment'])
? $this->filterQueryAndFragment($parts['fragment'])
: '';
if (isset($parts['pass'])) {
$this->userInfo .= ':'.$parts['pass'];
}
$this->removeDefaultPort();
}
/**
* @param string $scheme
*
* @return string
*
* @throws \InvalidArgumentException if the scheme is invalid
*/
private function filterScheme($scheme)
{
if (!is_string($scheme)) {
throw new \InvalidArgumentException('Scheme must be a string');
}
return strtolower($scheme);
}
/**
* @param string $host
*
* @return string
*
* @throws \InvalidArgumentException if the host is invalid
*/
private function filterHost($host)
{
if (!is_string($host)) {
throw new \InvalidArgumentException('Host must be a string');
}
return strtolower($host);
}
/**
* @param int|null $port
*
* @return int|null
*
* @throws \InvalidArgumentException if the port is invalid
*/
private function filterPort($port)
{
if (null === $port) {
return null;
}
$port = (int) $port;
if (1 > $port || 0xffff < $port) {
throw new \InvalidArgumentException(sprintf('Invalid port: %d. Must be between 1 and 65535', $port));
}
return $port;
}
private function removeDefaultPort()
{
if (null !== $this->port && self::isDefaultPort($this)) {
$this->port = null;
}
}
/**
* Filters the path of a URI.
*
* @param string $path
*
* @return string
*
* @throws \InvalidArgumentException if the path is invalid
*/
private function filterPath($path)
{
if (!is_string($path)) {
throw new \InvalidArgumentException('Path must be a string');
}
return preg_replace_callback(
'/(?:[^'.self::$charUnreserved.self::$charSubDelims.'%:@\/]++|%(?![A-Fa-f0-9]{2}))/',
[$this, 'rawurlencodeMatchZero'],
$path
);
}
/**
* Filters the query string or fragment of a URI.
*
* @param string $str
*
* @return string
*
* @throws \InvalidArgumentException if the query or fragment is invalid
*/
private function filterQueryAndFragment($str)
{
if (!is_string($str)) {
throw new \InvalidArgumentException('Query and fragment must be a string');
}
return preg_replace_callback(
'/(?:[^'.self::$charUnreserved.self::$charSubDelims.'%:@\/\?]++|%(?![A-Fa-f0-9]{2}))/',
[$this, 'rawurlencodeMatchZero'],
$str
);
}
private function rawurlencodeMatchZero(array $match)
{
return rawurlencode($match[0]);
}
private function validateState()
{
if ('' === $this->host && ('http' === $this->scheme || 'https' === $this->scheme)) {
$this->host = self::HTTP_DEFAULT_HOST;
}
if ('' === $this->getAuthority()) {
if (0 === strpos($this->path, '//')) {
throw new \InvalidArgumentException('The path of a URI without an authority must not start with two slashes "//"');
}
$parts = explode('/', $this->path, 2);
if ('' === $this->scheme && false !== strpos($parts[0], ':')) {
throw new \InvalidArgumentException('A relative URI must not have a path beginning with a segment containing a colon');
}
} elseif (isset($this->path[0]) && '/' !== $this->path[0]) {
@trigger_error(
'The path of a URI with an authority must start with a slash "/" or be empty. Automagically fixing the URI '.
'by adding a leading slash to the path is deprecated since version 1.4 and will throw an exception instead.',
E_USER_DEPRECATED
);
$this->path = '/'.$this->path;
//throw new \InvalidArgumentException('The path of a URI with an authority must start with a slash "/" or be empty');
}
}
}