mirror of
https://github.com/php-curl-class/php-curl-class.git
synced 2026-08-29 11:41:15 +00:00
Zach Borboa
210 lines
8.7 KiB
PHP
210 lines
8.7 KiB
PHP
<?php
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namespace Curl;
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use Curl\StringUtil;
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class Url
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{
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private $baseUrl = null;
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private $relativeUrl = null;
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public function __construct($base_url, $relative_url = null)
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{
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$this->baseUrl = $base_url;
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$this->relativeUrl = $relative_url;
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}
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public function __toString()
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{
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return $this->absolutizeUrl();
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}
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/**
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* Remove dot segments.
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*
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* Interpret and remove the special "." and ".." path segments from a referenced path.
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*/
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public static function removeDotSegments($input)
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{
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// 1. The input buffer is initialized with the now-appended path
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// components and the output buffer is initialized to the empty
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// string.
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$output = '';
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// 2. While the input buffer is not empty, loop as follows:
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while (!empty($input)) {
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// A. If the input buffer begins with a prefix of "../" or "./",
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// then remove that prefix from the input buffer; otherwise,
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if (StringUtil::startsWith($input, '../')) {
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$input = substr($input, 3);
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} elseif (StringUtil::startsWith($input, './')) {
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$input = substr($input, 2);
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// B. if the input buffer begins with a prefix of "/./" or "/.",
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// where "." is a complete path segment, then replace that
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// prefix with "/" in the input buffer; otherwise,
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} elseif (StringUtil::startsWith($input, '/./')) {
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$input = substr($input, 2);
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} elseif ($input === '/.') {
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$input = '/';
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// C. if the input buffer begins with a prefix of "/../" or "/..",
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// where ".." is a complete path segment, then replace that
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// prefix with "/" in the input buffer and remove the last
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// segment and its preceding "/" (if any) from the output
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// buffer; otherwise,
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} elseif (StringUtil::startsWith($input, '/../')) {
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$input = substr($input, 3);
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$output = substr_replace($output, '', StringUtil::reversePosition($output, '/'));
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} elseif ($input === '/..') {
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$input = '/';
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$output = substr_replace($output, '', StringUtil::reversePosition($output, '/'));
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// D. if the input buffer consists only of "." or "..", then remove
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// that from the input buffer; otherwise,
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} elseif ($input === '.' || $input === '..') {
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$input = '';
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// E. move the first path segment in the input buffer to the end of
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// the output buffer, including the initial "/" character (if
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// any) and any subsequent characters up to, but not including,
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// the next "/" character or the end of the input buffer.
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} elseif (!(($pos = StringUtil::position($input, '/', 1)) === false)) {
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$output .= substr($input, 0, $pos);
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$input = substr_replace($input, '', 0, $pos);
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} else {
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$output .= $input;
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$input = '';
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}
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}
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// 3. Finally, the output buffer is returned as the result of
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// remove_dot_segments.
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return $output . $input;
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}
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/**
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* Absolutize url.
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*
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* Combine the base and relative url into an absolute url.
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*/
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private function absolutizeUrl()
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{
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$b = $this->parseUrl($this->baseUrl);
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if (!isset($b['path'])) {
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$b['path'] = '/';
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}
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if (is_null($this->relativeUrl)) {
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return $this->unparseUrl($b);
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}
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$r = $this->parseUrl($this->relativeUrl);
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$r['authorized'] = isset($r['scheme']) || isset($r['host']) || isset($r['port'])
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|| isset($r['user']) || isset($r['pass']);
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$target = array();
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if (isset($r['scheme'])) {
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$target['scheme'] = $r['scheme'];
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$target['host'] = isset($r['host']) ? $r['host'] : null;
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$target['port'] = isset($r['port']) ? $r['port'] : null;
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$target['user'] = isset($r['user']) ? $r['user'] : null;
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$target['pass'] = isset($r['pass']) ? $r['pass'] : null;
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$target['path'] = isset($r['path']) ? self::removeDotSegments($r['path']) : null;
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$target['query'] = isset($r['query']) ? $r['query'] : null;
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} else {
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$target['scheme'] = isset($b['scheme']) ? $b['scheme'] : null;
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if ($r['authorized']) {
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$target['host'] = isset($r['host']) ? $r['host'] : null;
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$target['port'] = isset($r['port']) ? $r['port'] : null;
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$target['user'] = isset($r['user']) ? $r['user'] : null;
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$target['pass'] = isset($r['pass']) ? $r['pass'] : null;
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$target['path'] = isset($r['path']) ? self::removeDotSegments($r['path']) : null;
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$target['query'] = isset($r['query']) ? $r['query'] : null;
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} else {
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$target['host'] = isset($b['host']) ? $b['host'] : null;
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$target['port'] = isset($b['port']) ? $b['port'] : null;
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$target['user'] = isset($b['user']) ? $b['user'] : null;
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$target['pass'] = isset($b['pass']) ? $b['pass'] : null;
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if (!isset($r['path']) || $r['path'] === '') {
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$target['path'] = $b['path'];
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$target['query'] = isset($r['query']) ? $r['query'] : (isset($b['query']) ? $b['query'] : null);
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} else {
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if (StringUtil::startsWith($r['path'], '/')) {
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$target['path'] = self::removeDotSegments($r['path']);
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} else {
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$base = StringUtil::characterReversePosition($b['path'], '/', true);
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if ($base === false) {
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$base = '';
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}
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$target['path'] = self::removeDotSegments($base . '/' . $r['path']);
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}
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$target['query'] = isset($r['query']) ? $r['query'] : null;
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}
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}
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}
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if ($this->relativeUrl === '') {
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$target['fragment'] = isset($b['fragment']) ? $b['fragment'] : null;
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} else {
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$target['fragment'] = isset($r['fragment']) ? $r['fragment'] : null;
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}
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$absolutized_url = $this->unparseUrl($target);
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return $absolutized_url;
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}
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/**
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* Parse url.
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*
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* Parse url into components of a URI as specified by RFC 3986.
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*/
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private function parseUrl($url)
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{
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// ALPHA = A-Z / a-z
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$alpha = 'A-Za-z';
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// DIGIT = 0-9
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$digit = '0-9';
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// unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
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$unreserved = $alpha . $digit . preg_quote('-._~');
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// sub-delims = "!" / "$" / "&" / "'" / "(" / ")"
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// / "*" / "+" / "," / ";" / "=" / "#"
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$sub_delims = preg_quote('!$&\'()*+,;=#');
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// HEXDIG = DIGIT / "A" / "B" / "C" / "D" / "E" / "F"
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$hexdig = $digit . 'A-F';
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// "The uppercase hexadecimal digits 'A' through 'F' are equivalent to
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// the lowercase digits 'a' through 'f', respectively."
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$hexdig .= 'a-f';
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$pattern = '/(?:[^' . $unreserved . $sub_delims . preg_quote(':@%/?', '/') . ']++|%(?![' . $hexdig . ']{2}))/';
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$url = preg_replace_callback(
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$pattern,
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function ($matches) {
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return rawurlencode($matches[0]);
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},
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$url
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);
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return parse_url($url);
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}
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/**
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* Unparse url.
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*
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* Combine url components into a url.
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*/
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private function unparseUrl($parsed_url)
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{
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$scheme = isset($parsed_url['scheme']) ? $parsed_url['scheme'] . '://' : '';
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$user = isset($parsed_url['user']) ? $parsed_url['user'] : '';
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$pass = isset($parsed_url['pass']) ? ':' . $parsed_url['pass'] : '';
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$pass = ($user || $pass) ? $pass . '@' : '';
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$host = isset($parsed_url['host']) ? $parsed_url['host'] : '';
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$port = isset($parsed_url['port']) ? ':' . $parsed_url['port'] : '';
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$path = isset($parsed_url['path']) ? $parsed_url['path'] : '';
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$query = isset($parsed_url['query']) ? '?' . $parsed_url['query'] : '';
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$fragment = isset($parsed_url['fragment']) ? '#' . $parsed_url['fragment'] : '';
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$unparsed_url = $scheme . $user . $pass . $host . $port . $path . $query . $fragment;
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return $unparsed_url;
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}
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}
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