| 1: | <?php
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| 4: |
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| 5: | class HTMLPurifier_URIFilter_MakeAbsolute extends HTMLPurifier_URIFilter
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| 6: | {
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| 7: | |
| 8: | |
| 9: |
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| 10: | public $name = 'MakeAbsolute';
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| 11: |
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| 12: | |
| 13: | |
| 14: |
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| 15: | protected $base;
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| 16: |
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| 17: | |
| 18: | |
| 19: |
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| 20: | protected $basePathStack = array();
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| 21: |
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| 22: | |
| 23: | |
| 24: | |
| 25: |
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| 26: | public function prepare($config)
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| 27: | {
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| 28: | $def = $config->getDefinition('URI');
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| 29: | $this->base = $def->base;
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| 30: | if (is_null($this->base)) {
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| 31: | trigger_error(
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| 32: | 'URI.MakeAbsolute is being ignored due to lack of ' .
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| 33: | 'value for URI.Base configuration',
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| 34: | E_USER_WARNING
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| 35: | );
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| 36: | return false;
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| 37: | }
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| 38: | $this->base->fragment = null;
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| 39: | $stack = explode('/', $this->base->path);
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| 40: | array_pop($stack);
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| 41: | $stack = $this->_collapseStack($stack);
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| 42: | $this->basePathStack = $stack;
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| 43: | return true;
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| 44: | }
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| 45: |
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| 46: | |
| 47: | |
| 48: | |
| 49: | |
| 50: | |
| 51: |
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| 52: | public function filter(&$uri, $config, $context)
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| 53: | {
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| 54: | if (is_null($this->base)) {
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| 55: | return true;
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| 56: | }
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| 57: | if ($uri->path === '' && is_null($uri->scheme) &&
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| 58: | is_null($uri->host) && is_null($uri->query) && is_null($uri->fragment)) {
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| 59: |
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| 60: | $uri = clone $this->base;
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| 61: | return true;
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| 62: | }
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| 63: | if (!is_null($uri->scheme)) {
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| 64: |
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| 65: | if (!is_null($uri->host)) {
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| 66: | return true;
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| 67: | }
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| 68: | $scheme_obj = $uri->getSchemeObj($config, $context);
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| 69: | if (!$scheme_obj) {
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| 70: |
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| 71: | return false;
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| 72: | }
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| 73: | if (!$scheme_obj->hierarchical) {
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| 74: |
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| 75: | return true;
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| 76: | }
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| 77: |
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| 78: | }
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| 79: | if (!is_null($uri->host)) {
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| 80: |
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| 81: | return true;
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| 82: | }
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| 83: | if ($uri->path === '') {
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| 84: | $uri->path = $this->base->path;
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| 85: | } elseif ($uri->path[0] !== '/') {
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| 86: |
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| 87: | $stack = explode('/', $uri->path);
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| 88: | $new_stack = array_merge($this->basePathStack, $stack);
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| 89: | if ($new_stack[0] !== '' && !is_null($this->base->host)) {
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| 90: | array_unshift($new_stack, '');
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| 91: | }
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| 92: | $new_stack = $this->_collapseStack($new_stack);
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| 93: | $uri->path = implode('/', $new_stack);
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| 94: | } else {
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| 95: |
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| 96: | $uri->path = implode('/', $this->_collapseStack(explode('/', $uri->path)));
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| 97: | }
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| 98: |
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| 99: | $uri->scheme = $this->base->scheme;
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| 100: | if (is_null($uri->userinfo)) {
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| 101: | $uri->userinfo = $this->base->userinfo;
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| 102: | }
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| 103: | if (is_null($uri->host)) {
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| 104: | $uri->host = $this->base->host;
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| 105: | }
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| 106: | if (is_null($uri->port)) {
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| 107: | $uri->port = $this->base->port;
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| 108: | }
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| 109: | return true;
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| 110: | }
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| 111: |
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| 112: | |
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| 114: | |
| 115: | |
| 116: |
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| 117: | private function _collapseStack($stack)
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| 118: | {
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| 119: | $result = array();
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| 120: | $is_folder = false;
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| 121: | for ($i = 0; isset($stack[$i]); $i++) {
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| 122: | $is_folder = false;
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| 123: |
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| 124: | if ($stack[$i] == '' && $i && isset($stack[$i + 1])) {
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| 125: | continue;
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| 126: | }
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| 127: | if ($stack[$i] == '..') {
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| 128: | if (!empty($result)) {
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| 129: | $segment = array_pop($result);
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| 130: | if ($segment === '' && empty($result)) {
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| 131: |
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| 132: |
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| 133: | $result[] = '';
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| 134: | } elseif ($segment === '..') {
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| 135: | $result[] = '..';
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| 136: | }
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| 137: | } else {
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| 138: |
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| 139: | $result[] = '..';
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| 140: | }
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| 141: | $is_folder = true;
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| 142: | continue;
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| 143: | }
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| 144: | if ($stack[$i] == '.') {
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| 145: |
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| 146: | $is_folder = true;
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| 147: | continue;
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| 148: | }
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| 149: | $result[] = $stack[$i];
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| 150: | }
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| 151: | if ($is_folder) {
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| 152: | $result[] = '';
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| 153: | }
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| 154: | return $result;
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| 155: | }
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| 156: | }
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| 157: |
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| 158: |
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| 159: | |