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<?php namespace GuzzleHttp\Psr7; use Psr\Http\Message\UriInterface; /** * PSR-7 URI implementation. * * @author Michael Dowling * @author Tobias Schultze * @author Matthew Weier O'Phinney */ class Uri implements UriInterface { private static $schemes = [ 'http' => 80, 'https' => 443, ]; 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 = '') { if ($uri != '') { $parts = parse_url($uri); if ($parts === false) { throw new \InvalidArgumentException("Unable to parse URI: $uri"); } $this->applyParts($parts); } } public function __toString() { return self::createUriString( $this->scheme, $this->getAuthority(), $this->path, $this->query, $this->fragment ); } /** * Removes dot segments from a path and returns the new path. * * @param string $path * * @return string * @link http://tools.ietf.org/html/rfc3986#section-5.2.4 */ public static function removeDotSegments($path) { static $noopPaths = ['' => true, '/' => true, '*' => true]; static $ignoreSegments = ['.' => true, '..' => true]; if (isset($noopPaths[$path])) { return $path; } $results = []; $segments = explode('/', $path); foreach ($segments as $segment) { if ($segment === '..') { array_pop($results); } elseif (!isset($ignoreSegments[$segment])) { $results[] = $segment; } } $newPath = implode('/', $results); // Add the leading slash if necessary if (substr($path, 0, 1) === '/' && substr($newPath, 0, 1) !== '/' ) { $newPath = '/' . $newPath; } // Add the trailing slash if necessary if ($newPath !== '/' && isset($ignoreSegments[end($segments)])) { $newPath .= '/'; } return $newPath; } /** * Resolve a base URI with a relative URI and return a new URI. * * @param UriInterface $base Base URI * @param string|UriInterface $rel Relative URI * * @return UriInterface * @link http://tools.ietf.org/html/rfc3986#section-5.2 */ public static function resolve(UriInterface $base, $rel) { if (!($rel instanceof UriInterface)) { $rel = new self($rel); } if ((string) $rel === '') { // we can simply return the same base URI instance for this same-document reference return $base; } if ($rel->getScheme() != '') { return $rel->withPath(self::removeDotSegments($rel->getPath())); } if ($rel->getAuthority() != '') { $targetAuthority = $rel->getAuthority(); $targetPath = self::removeDotSegments($rel->getPath()); $targetQuery = $rel->getQuery(); } else { $targetAuthority = $base->getAuthority(); if ($rel->getPath() === '') { $targetPath = $base->getPath(); $targetQuery = $rel->getQuery() != '' ? $rel->getQuery() : $base->getQuery(); } else { if ($rel->getPath()[0] === '/') { $targetPath = $rel->getPath(); } else { if ($targetAuthority != '' && $base->getPath() === '') { $targetPath = '/' . $rel->getPath(); } else { $lastSlashPos = strrpos($base->getPath(), '/'); if ($lastSlashPos === false) { $targetPath = $rel->getPath(); } else { $targetPath = substr($base->getPath(), 0, $lastSlashPos + 1) . $rel->getPath(); } } } $targetPath = self::removeDotSegments($targetPath); $targetQuery = $rel->getQuery(); } } return new self(self::createUriString( $base->getScheme(), $targetAuthority, $targetPath, $targetQuery, $rel->getFragment() )); } /** * Create 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) { return rawurldecode(explode('=', $part)[0]) !== $decodedKey; }); return $uri->withQuery(implode('&', $result)); } /** * Create 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) { return rawurldecode(explode('=', $part)[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::$replaceQuery); if ($value !== null) { $result[] = $key . '=' . strtr($value, self::$replaceQuery); } else { $result[] = $key; } return $uri->withQuery(implode('&', $result)); } /** * Create a URI from a hash of parse_url parts. * * @param array $parts * * @return self */ public static function fromParts(array $parts) { $uri = new self(); $uri->applyParts($parts); return $uri; } public function getScheme() { return $this->scheme; } public function getAuthority() { if ($this->host == '') { return ''; } $authority = $this->host; if ($this->userInfo != '') { $authority = $this->userInfo . '@' . $authority; } if ($this->port !== null) { $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->port = $new->filterPort($new->port); 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; return $new; } public function withHost($host) { $host = $this->filterHost($host); if ($this->host === $host) { return $this; } $new = clone $this; $new->host = $host; return $new; } public function withPort($port) { $port = $this->filterPort($port); if ($this->port === $port) { return $this; } $new = clone $this; $new->port = $port; return $new; } public function withPath($path) { $path = $this->filterPath($path); if ($this->path === $path) { return $this; } $new = clone $this; $new->path = $path; 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']; } } /** * Create a URI string from its various parts * * @param string $scheme * @param string $authority * @param string $path * @param string $query * @param string $fragment * @return string */ private static function createUriString($scheme, $authority, $path, $query, $fragment) { $uri = ''; if ($scheme != '') { $uri .= $scheme . ':'; } if ($authority != '') { $uri .= '//' . $authority; } if ($path != '') { if ($path[0] !== '/') { if ($authority != '') { // If the path is rootless and an authority is present, the path MUST be prefixed by "/" $path = '/' . $path; } } elseif (isset($path[1]) && $path[1] === '/') { if ($authority == '') { // If the path is starting with more than one "/" and no authority is present, the // starting slashes MUST be reduced to one. $path = '/' . ltrim($path, '/'); } } $uri .= $path; } if ($query != '') { $uri .= '?' . $query; } if ($fragment != '') { $uri .= '#' . $fragment; } return $uri; } /** * Is a given port non-standard for the current scheme? * * @param string $scheme * @param int $port * * @return bool */ private static function isNonStandardPort($scheme, $port) { return !isset(self::$schemes[$scheme]) || $port !== self::$schemes[$scheme]; } /** * @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 ($port === null) { return null; } $port = (int) $port; if (1 > $port || 0xffff < $port) { throw new \InvalidArgumentException( sprintf('Invalid port: %d. Must be between 1 and 65535', $port) ); } return self::isNonStandardPort($this->scheme, $port) ? $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]); } }