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<?php
namespace GuzzleHttp;
use GuzzleHttp\Ring\Core;
/**
* Parses and generates URLs based on URL parts
*/
class Url
{
private $scheme;
private $host;
private $port;
private $username;
private $password;
private $path = '';
private $fragment;
private static $defaultPorts = ['http' => 80, 'https' => 443, 'ftp' => 21];
private static $pathPattern = '/[^a-zA-Z0-9\-\._~!\$&\'\(\)\*\+,;=%:@\/]+|%(?![A-Fa-f0-9]{2})/';
private static $queryPattern = '/[^a-zA-Z0-9\-\._~!\$\'\(\)\*\+,;%:@\/\?=&]+|%(?![A-Fa-f0-9]{2})/';
/** @var Query|string Query part of the URL */
private $query;
/**
* Factory method to create a new URL from a URL string
*
* @param string $url Full URL used to create a Url object
*
* @return Url
* @throws \InvalidArgumentException
*/
public static function fromString($url)
{
static $defaults = ['scheme' => null, 'host' => null,
'path' => null, 'port' => null, 'query' => null,
'user' => null, 'pass' => null, 'fragment' => null];
if (false === ($parts = parse_url($url))) {
throw new \InvalidArgumentException('Unable to parse malformed '
. 'url: ' . $url);
}
$parts += $defaults;
// Convert the query string into a Query object
if ($parts['query'] || 0 !== strlen($parts['query'])) {
$parts['query'] = Query::fromString($parts['query']);
}
return new static($parts['scheme'], $parts['host'], $parts['user'],
$parts['pass'], $parts['port'], $parts['path'], $parts['query'],
$parts['fragment']);
}
/**
* Build a URL from parse_url parts. The generated URL will be a relative
* URL if a scheme or host are not provided.
*
* @param array $parts Array of parse_url parts
*
* @return string
*/
public static function buildUrl(array $parts)
{
$url = $scheme = '';
if (!empty($parts['scheme'])) {
$scheme = $parts['scheme'];
$url .= $scheme . ':';
}
if (!empty($parts['host'])) {
$url .= '//';
if (isset($parts['user'])) {
$url .= $parts['user'];
if (isset($parts['pass'])) {
$url .= ':' . $parts['pass'];
}
$url .= '@';
}
$url .= $parts['host'];
// Only include the port if it is not the default port of the scheme
if (isset($parts['port']) &&
(!isset(self::$defaultPorts[$scheme]) ||
$parts['port'] != self::$defaultPorts[$scheme])
) {
$url .= ':' . $parts['port'];
}
}
// Add the path component if present
if (isset($parts['path']) && strlen($parts['path'])) {
// Always ensure that the path begins with '/' if set and something
// is before the path
if (!empty($parts['host']) && $parts['path'][0] != '/') {
$url .= '/';
}
$url .= $parts['path'];
}
// Add the query string if present
if (isset($parts['query'])) {
$queryStr = (string) $parts['query'];
if ($queryStr || $queryStr === '0') {
$url .= '?' . $queryStr;
}
}
// Ensure that # is only added to the url if fragment contains anything.
if (isset($parts['fragment'])) {
$url .= '#' . $parts['fragment'];
}
return $url;
}
/**
* Create a new URL from URL parts
*
* @param string $scheme Scheme of the URL
* @param string $host Host of the URL
* @param string $username Username of the URL
* @param string $password Password of the URL
* @param int $port Port of the URL
* @param string $path Path of the URL
* @param Query|array|string $query Query string of the URL
* @param string $fragment Fragment of the URL
*/
public function __construct(
$scheme,
$host,
$username = null,
$password = null,
$port = null,
$path = null,
$query = null,
$fragment = null
) {
$this->scheme = strtolower($scheme);
$this->host = $host;
$this->port = $port;
$this->username = $username;
$this->password = $password;
$this->fragment = $fragment;
if ($query) {
$this->setQuery($query);
}
$this->setPath($path);
}
/**
* Clone the URL
*/
public function __clone()
{
if ($this->query instanceof Query) {
$this->query = clone $this->query;
}
}
/**
* Returns the URL as a URL string
*
* @return string
*/
public function __toString()
{
return static::buildUrl($this->getParts());
}
/**
* Get the parts of the URL as an array
*
* @return array
*/
public function getParts()
{
return array(
'scheme' => $this->scheme,
'user' => $this->username,
'pass' => $this->password,
'host' => $this->host,
'port' => $this->port,
'path' => $this->path,
'query' => $this->query,
'fragment' => $this->fragment,
);
}
/**
* Set the host of the request.
*
* @param string $host Host to set (e.g. www.yahoo.com, yahoo.com)
*
* @return Url
*/
public function setHost($host)
{
if (strpos($host, ':') === false) {
$this->host = $host;
} else {
list($host, $port) = explode(':', $host);
$this->host = $host;
$this->setPort($port);
}
}
/**
* Get the host part of the URL
*
* @return string
*/
public function getHost()
{
return $this->host;
}
/**
* Set the scheme part of the URL (http, https, ftp, etc.)
*
* @param string $scheme Scheme to set
*/
public function setScheme($scheme)
{
// Remove the default port if one is specified
if ($this->port
&& isset(self::$defaultPorts[$this->scheme])
&& self::$defaultPorts[$this->scheme] == $this->port
) {
$this->port = null;
}
$this->scheme = strtolower($scheme);
}
/**
* Get the scheme part of the URL
*
* @return string
*/
public function getScheme()
{
return $this->scheme;
}
/**
* Set the port part of the URL
*
* @param int $port Port to set
*/
public function setPort($port)
{
$this->port = $port;
}
/**
* Get the port part of the URl.
*
* If no port was set, this method will return the default port for the
* scheme of the URI.
*
* @return int|null
*/
public function getPort()
{
if ($this->port) {
return $this->port;
} elseif (isset(self::$defaultPorts[$this->scheme])) {
return self::$defaultPorts[$this->scheme];
}
return null;
}
/**
* Set the path part of the URL.
*
* The provided URL is URL encoded as necessary.
*
* @param string $path Path string to set
*/
public function setPath($path)
{
$this->path = self::encodePath($path);
}
/**
* Removes dot segments from a URL
* @link http://tools.ietf.org/html/rfc3986#section-5.2.4
*/
public function removeDotSegments()
{
static $noopPaths = ['' => true, '/' => true, '*' => true];
static $ignoreSegments = ['.' => true, '..' => true];
if (isset($noopPaths[$this->path])) {
return;
}
$results = [];
$segments = $this->getPathSegments();
foreach ($segments as $segment) {
if ($segment == '..') {
array_pop($results);
} elseif (!isset($ignoreSegments[$segment])) {
$results[] = $segment;
}
}
$newPath = implode('/', $results);
// Add the leading slash if necessary
if (substr($this->path, 0, 1) === '/' &&
substr($newPath, 0, 1) !== '/'
) {
$newPath = '/' . $newPath;
}
// Add the trailing slash if necessary
if ($newPath != '/' && isset($ignoreSegments[end($segments)])) {
$newPath .= '/';
}
$this->path = $newPath;
}
/**
* Add a relative path to the currently set path.
*
* @param string $relativePath Relative path to add
*/
public function addPath($relativePath)
{
if ($relativePath != '/' &&
is_string($relativePath) &&
strlen($relativePath) > 0
) {
// Add a leading slash if needed
if ($relativePath[0] !== '/' &&
substr($this->path, -1, 1) !== '/'
) {
$relativePath = '/' . $relativePath;
}
$this->setPath($this->path . $relativePath);
}
}
/**
* Get the path part of the URL
*
* @return string
*/
public function getPath()
{
return $this->path;
}
/**
* Get the path segments of the URL as an array
*
* @return array
*/
public function getPathSegments()
{
return explode('/', $this->path);
}
/**
* Set the password part of the URL
*
* @param string $password Password to set
*/
public function setPassword($password)
{
$this->password = $password;
}
/**
* Get the password part of the URL
*
* @return null|string
*/
public function getPassword()
{
return $this->password;
}
/**
* Set the username part of the URL
*
* @param string $username Username to set
*/
public function setUsername($username)
{
$this->username = $username;
}
/**
* Get the username part of the URl
*
* @return null|string
*/
public function getUsername()
{
return $this->username;
}
/**
* Get the query part of the URL as a Query object
*
* @return Query
*/
public function getQuery()
{
// Convert the query string to a query object if not already done.
if (!$this->query instanceof Query) {
$this->query = $this->query === null
? new Query()
: Query::fromString($this->query);
}
return $this->query;
}
/**
* Set the query part of the URL.
*
* You may provide a query string as a string and pass $rawString as true
* to provide a query string that is not parsed until a call to getQuery()
* is made. Setting a raw query string will still encode invalid characters
* in a query string.
*
* @param Query|string|array $query Query string value to set. Can
* be a string that will be parsed into a Query object, an array
* of key value pairs, or a Query object.
* @param bool $rawString Set to true when providing a raw query string.
*
* @throws \InvalidArgumentException
*/
public function setQuery($query, $rawString = false)
{
if ($query instanceof Query) {
$this->query = $query;
} elseif (is_string($query)) {
if (!$rawString) {
$this->query = Query::fromString($query);
} else {
// Ensure the query does not have illegal characters.
$this->query = preg_replace_callback(
self::$queryPattern,
[__CLASS__, 'encodeMatch'],
$query
);
}
} elseif (is_array($query)) {
$this->query = new Query($query);
} else {
throw new \InvalidArgumentException('Query must be a Query, '
. 'array, or string. Got ' . Core::describeType($query));
}
}
/**
* Get the fragment part of the URL
*
* @return null|string
*/
public function getFragment()
{
return $this->fragment;
}
/**
* Set the fragment part of the URL
*
* @param string $fragment Fragment to set
*/
public function setFragment($fragment)
{
$this->fragment = $fragment;
}
/**
* Check if this is an absolute URL
*
* @return bool
*/
public function isAbsolute()
{
return $this->scheme && $this->host;
}
/**
* Combine the URL with another URL and return a new URL instance.
*
* Follows the rules specific in RFC 3986 section 5.4.
*
* @param string $url Relative URL to combine with
*
* @return Url
* @throws \InvalidArgumentException
* @link http://tools.ietf.org/html/rfc3986#section-5.4
*/
public function combine($url)
{
$url = static::fromString($url);
// Use the more absolute URL as the base URL
if (!$this->isAbsolute() && $url->isAbsolute()) {
$url = $url->combine($this);
}
$parts = $url->getParts();
// Passing a URL with a scheme overrides everything
if ($parts['scheme']) {
return clone $url;
}
// Setting a host overrides the entire rest of the URL
if ($parts['host']) {
return new static(
$this->scheme,
$parts['host'],
$parts['user'],
$parts['pass'],
$parts['port'],
$parts['path'],
$parts['query'] instanceof Query
? clone $parts['query']
: $parts['query'],
$parts['fragment']
);
}
if (!$parts['path'] && $parts['path'] !== '0') {
// The relative URL has no path, so check if it is just a query
$path = $this->path ?: '';
$query = $parts['query'] ?: $this->query;
} else {
$query = $parts['query'];
if ($parts['path'][0] == '/' || !$this->path) {
// Overwrite the existing path if the rel path starts with "/"
$path = $parts['path'];
} else {
// If the relative URL does not have a path or the base URL
// path does not end in a "/" then overwrite the existing path
// up to the last "/"
$path = substr($this->path, 0, strrpos($this->path, '/') + 1) . $parts['path'];
}
}
$result = new self(
$this->scheme,
$this->host,
$this->username,
$this->password,
$this->port,
$path,
$query instanceof Query ? clone $query : $query,
$parts['fragment']
);
if ($path) {
$result->removeDotSegments();
}
return $result;
}
/**
* Encodes the path part of a URL without double-encoding percent-encoded
* key value pairs.
*
* @param string $path Path to encode
*
* @return string
*/
public static function encodePath($path)
{
static $cb = [__CLASS__, 'encodeMatch'];
return preg_replace_callback(self::$pathPattern, $cb, $path);
}
private static function encodeMatch(array $match)
{
return rawurlencode($match[0]);
}
}