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<?php
declare(strict_types=1);
namespace GuzzleHttp\Psr7;
use GuzzleHttp\Psr7\Exception\MalformedUriException;
use Psr\Http\Message\UriInterface;
/**
* PSR-7 URI implementation.
*
* @author Michael Dowling
* @author Tobias Schultze
* @author Matthew Weier O'Phinney
*/
class Uri implements UriInterface, \JsonSerializable
{
/**
* 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.
*/
private const HTTP_DEFAULT_HOST = 'localhost';
private const DEFAULT_PORTS = [
'http' => 80,
'https' => 443,
'ftp' => 21,
'gopher' => 70,
'nntp' => 119,
'news' => 119,
'telnet' => 23,
'tn3270' => 23,
'imap' => 143,
'pop' => 110,
'ldap' => 389,
];
/**
* Unreserved characters for use in a regex.
*
* @link https://tools.ietf.org/html/rfc3986#section-2.3
*/
private const CHAR_UNRESERVED = 'a-zA-Z0-9_\-\.~';
/**
* Sub-delims for use in a regex.
*
* @link https://tools.ietf.org/html/rfc3986#section-2.2
*/
private const CHAR_SUB_DELIMS = '!\$&\'\(\)\*\+,;=';
private const QUERY_SEPARATORS_REPLACEMENT = ['=' => '%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 = '';
/** @var string|null String representation */
private $composedComponents;
public function __construct(string $uri = '')
{
if ($uri !== '') {
$parts = self::parse($uri);
if ($parts === false) {
throw new MalformedUriException("Unable to parse URI: $uri");
}
$this->applyParts($parts);
}
}
/**
* UTF-8 aware \parse_url() replacement.
*
* The internal function produces broken output for non ASCII domain names
* (IDN) when used with locales other than "C".
*
* On the other hand, cURL understands IDN correctly only when UTF-8 locale
* is configured ("C.UTF-8", "en_US.UTF-8", etc.).
*
* @see https://bugs.php.net/bug.php?id=52923
* @see https://www.php.net/manual/en/function.parse-url.php#114817
* @see https://curl.haxx.se/libcurl/c/CURLOPT_URL.html#ENCODING
*
* @return array|false
*/
private static function parse(string $url)
{
// If IPv6
$prefix = '';
if (preg_match('%^(.*://\[[0-9:a-f]+\])(.*?)$%', $url, $matches)) {
/** @var array{0:string, 1:string, 2:string} $matches */
$prefix = $matches[1];
$url = $matches[2];
}
/** @var string */
$encodedUrl = preg_replace_callback(
'%[^:/@?&=#]+%usD',
static function ($matches) {
return urlencode($matches[0]);
},
$url
);
$result = parse_url($prefix . $encodedUrl);
if ($result === false) {
return false;
}
return array_map('urldecode', $result);
}
public function __toString(): string
{
if ($this->composedComponents === null) {
$this->composedComponents = self::composeComponents(
$this->scheme,
$this->getAuthority(),
$this->path,
$this->query,
$this->fragment
);
}
return $this->composedComponents;
}
/**
* 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).
*
* @link https://tools.ietf.org/html/rfc3986#section-5.3
*/
public static function composeComponents(?string $scheme, ?string $authority, string $path, ?string $query, ?string $fragment): string
{
$uri = '';
// weak type checks to also accept null until we can add scalar type hints
if ($scheme != '') {
$uri .= $scheme . ':';
}
if ($authority != '' || $scheme === 'file') {
$uri .= '//' . $authority;
}
if ($authority != '' && $path != '' && $path[0] != '/') {
$path = '/' . $path;
}
$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.
*/
public static function isDefaultPort(UriInterface $uri): bool
{
return $uri->getPort() === null
|| (isset(self::DEFAULT_PORTS[$uri->getScheme()]) && $uri->getPort() === self::DEFAULT_PORTS[$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'
*
* @see Uri::isNetworkPathReference
* @see Uri::isAbsolutePathReference
* @see Uri::isRelativePathReference
* @link https://tools.ietf.org/html/rfc3986#section-4
*/
public static function isAbsolute(UriInterface $uri): bool
{
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.
*
* @link https://tools.ietf.org/html/rfc3986#section-4.2
*/
public static function isNetworkPathReference(UriInterface $uri): bool
{
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.
*
* @link https://tools.ietf.org/html/rfc3986#section-4.2
*/
public static function isAbsolutePathReference(UriInterface $uri): bool
{
return $uri->getScheme() === ''
&& $uri->getAuthority() === ''
&& isset($uri->getPath()[0])
&& $uri->getPath()[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.
*
* @link https://tools.ietf.org/html/rfc3986#section-4.2
*/
public static function isRelativePathReference(UriInterface $uri): bool
{
return $uri->getScheme() === ''
&& $uri->getAuthority() === ''
&& (!isset($uri->getPath()[0]) || $uri->getPath()[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
*
* @link https://tools.ietf.org/html/rfc3986#section-4.4
*/
public static function isSameDocumentReference(UriInterface $uri, UriInterface $base = null): bool
{
if ($base !== null) {
$uri = UriResolver::resolve($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() === '';
}
/**
* 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.
*/
public static function withoutQueryValue(UriInterface $uri, string $key): UriInterface
{
$result = self::getFilteredQueryString($uri, [$key]);
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
*/
public static function withQueryValue(UriInterface $uri, string $key, ?string $value): UriInterface
{
$result = self::getFilteredQueryString($uri, [$key]);
$result[] = self::generateQueryString($key, $value);
return $uri->withQuery(implode('&', $result));
}
/**
* Creates a new URI with multiple specific query string values.
*
* It has the same behavior as withQueryValue() but for an associative array of key => value.
*
* @param UriInterface $uri URI to use as a base.
* @param array<string, string|null> $keyValueArray Associative array of key and values
*/
public static function withQueryValues(UriInterface $uri, array $keyValueArray): UriInterface
{
$result = self::getFilteredQueryString($uri, array_keys($keyValueArray));
foreach ($keyValueArray as $key => $value) {
$result[] = self::generateQueryString((string) $key, $value !== null ? (string) $value : null);
}
return $uri->withQuery(implode('&', $result));
}
/**
* Creates a URI from a hash of `parse_url` components.
*
* @link http://php.net/manual/en/function.parse-url.php
*
* @throws MalformedUriException If the components do not form a valid URI.
*/
public static function fromParts(array $parts): UriInterface
{
$uri = new self();
$uri->applyParts($parts);
$uri->validateState();
return $uri;
}
public function getScheme(): string
{
return $this->scheme;
}
public function getAuthority(): string
{
$authority = $this->host;
if ($this->userInfo !== '') {
$authority = $this->userInfo . '@' . $authority;
}
if ($this->port !== null) {
$authority .= ':' . $this->port;
}
return $authority;
}
public function getUserInfo(): string
{
return $this->userInfo;
}
public function getHost(): string
{
return $this->host;
}
public function getPort(): ?int
{
return $this->port;
}
public function getPath(): string
{
return $this->path;
}
public function getQuery(): string
{
return $this->query;
}
public function getFragment(): string
{
return $this->fragment;
}
public function withScheme($scheme): UriInterface
{
$scheme = $this->filterScheme($scheme);
if ($this->scheme === $scheme) {
return $this;
}
$new = clone $this;
$new->scheme = $scheme;
$new->composedComponents = null;
$new->removeDefaultPort();
$new->validateState();
return $new;
}
public function withUserInfo($user, $password = null): UriInterface
{
$info = $this->filterUserInfoComponent($user);
if ($password !== null) {
$info .= ':' . $this->filterUserInfoComponent($password);
}
if ($this->userInfo === $info) {
return $this;
}
$new = clone $this;
$new->userInfo = $info;
$new->composedComponents = null;
$new->validateState();
return $new;
}
public function withHost($host): UriInterface
{
$host = $this->filterHost($host);
if ($this->host === $host) {
return $this;
}
$new = clone $this;
$new->host = $host;
$new->composedComponents = null;
$new->validateState();
return $new;
}
public function withPort($port): UriInterface
{
$port = $this->filterPort($port);
if ($this->port === $port) {
return $this;
}
$new = clone $this;
$new->port = $port;
$new->composedComponents = null;
$new->removeDefaultPort();
$new->validateState();
return $new;
}
public function withPath($path): UriInterface
{
$path = $this->filterPath($path);
if ($this->path === $path) {
return $this;
}
$new = clone $this;
$new->path = $path;
$new->composedComponents = null;
$new->validateState();
return $new;
}
public function withQuery($query): UriInterface
{
$query = $this->filterQueryAndFragment($query);
if ($this->query === $query) {
return $this;
}
$new = clone $this;
$new->query = $query;
$new->composedComponents = null;
return $new;
}
public function withFragment($fragment): UriInterface
{
$fragment = $this->filterQueryAndFragment($fragment);
if ($this->fragment === $fragment) {
return $this;
}
$new = clone $this;
$new->fragment = $fragment;
$new->composedComponents = null;
return $new;
}
public function jsonSerialize(): string
{
return $this->__toString();
}
/**
* Apply parse_url parts to a URI.
*
* @param array $parts Array of parse_url parts to apply.
*/
private function applyParts(array $parts): void
{
$this->scheme = isset($parts['scheme'])
? $this->filterScheme($parts['scheme'])
: '';
$this->userInfo = isset($parts['user'])
? $this->filterUserInfoComponent($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 .= ':' . $this->filterUserInfoComponent($parts['pass']);
}
$this->removeDefaultPort();
}
/**
* @param mixed $scheme
*
* @throws \InvalidArgumentException If the scheme is invalid.
*/
private function filterScheme($scheme): string
{
if (!is_string($scheme)) {
throw new \InvalidArgumentException('Scheme must be a string');
}
return \strtr($scheme, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz');
}
/**
* @param mixed $component
*
* @throws \InvalidArgumentException If the user info is invalid.
*/
private function filterUserInfoComponent($component): string
{
if (!is_string($component)) {
throw new \InvalidArgumentException('User info must be a string');
}
return preg_replace_callback(
'/(?:[^%' . self::CHAR_UNRESERVED . self::CHAR_SUB_DELIMS . ']+|%(?![A-Fa-f0-9]{2}))/',
[$this, 'rawurlencodeMatchZero'],
$component
);
}
/**
* @param mixed $host
*
* @throws \InvalidArgumentException If the host is invalid.
*/
private function filterHost($host): string
{
if (!is_string($host)) {
throw new \InvalidArgumentException('Host must be a string');
}
return \strtr($host, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz');
}
/**
* @param mixed $port
*
* @throws \InvalidArgumentException If the port is invalid.
*/
private function filterPort($port): ?int
{
if ($port === null) {
return null;
}
$port = (int) $port;
if (0 > $port || 0xffff < $port) {
throw new \InvalidArgumentException(
sprintf('Invalid port: %d. Must be between 0 and 65535', $port)
);
}
return $port;
}
/**
* @param string[] $keys
*
* @return string[]
*/
private static function getFilteredQueryString(UriInterface $uri, array $keys): array
{
$current = $uri->getQuery();
if ($current === '') {
return [];
}
$decodedKeys = array_map('rawurldecode', $keys);
return array_filter(explode('&', $current), function ($part) use ($decodedKeys) {
return !in_array(rawurldecode(explode('=', $part)[0]), $decodedKeys, true);
});
}
private static function generateQueryString(string $key, ?string $value): string
{
// 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().
$queryString = strtr($key, self::QUERY_SEPARATORS_REPLACEMENT);
if ($value !== null) {
$queryString .= '=' . strtr($value, self::QUERY_SEPARATORS_REPLACEMENT);
}
return $queryString;
}
private function removeDefaultPort(): void
{
if ($this->port !== null && self::isDefaultPort($this)) {
$this->port = null;
}
}
/**
* Filters the path of a URI
*
* @param mixed $path
*
* @throws \InvalidArgumentException If the path is invalid.
*/
private function filterPath($path): string
{
if (!is_string($path)) {
throw new \InvalidArgumentException('Path must be a string');
}
return preg_replace_callback(
'/(?:[^' . self::CHAR_UNRESERVED . self::CHAR_SUB_DELIMS . '%:@\/]++|%(?![A-Fa-f0-9]{2}))/',
[$this, 'rawurlencodeMatchZero'],
$path
);
}
/**
* Filters the query string or fragment of a URI.
*
* @param mixed $str
*
* @throws \InvalidArgumentException If the query or fragment is invalid.
*/
private function filterQueryAndFragment($str): string
{
if (!is_string($str)) {
throw new \InvalidArgumentException('Query and fragment must be a string');
}
return preg_replace_callback(
'/(?:[^' . self::CHAR_UNRESERVED . self::CHAR_SUB_DELIMS . '%:@\/\?]++|%(?![A-Fa-f0-9]{2}))/',
[$this, 'rawurlencodeMatchZero'],
$str
);
}
private function rawurlencodeMatchZero(array $match): string
{
return rawurlencode($match[0]);
}
private function validateState(): void
{
if ($this->host === '' && ($this->scheme === 'http' || $this->scheme === 'https')) {
$this->host = self::HTTP_DEFAULT_HOST;
}
if ($this->getAuthority() === '') {
if (0 === strpos($this->path, '//')) {
throw new MalformedUriException('The path of a URI without an authority must not start with two slashes "//"');
}
if ($this->scheme === '' && false !== strpos(explode('/', $this->path, 2)[0], ':')) {
throw new MalformedUriException('A relative URI must not have a path beginning with a segment containing a colon');
}
}
}
}
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