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-rw-r--r--vendor/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/MakeAbsolute.php158
1 files changed, 158 insertions, 0 deletions
diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/MakeAbsolute.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/MakeAbsolute.php
new file mode 100644
index 0000000..c507bbf
--- /dev/null
+++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/URIFilter/MakeAbsolute.php
@@ -0,0 +1,158 @@
+<?php
+
+// does not support network paths
+
+class HTMLPurifier_URIFilter_MakeAbsolute extends HTMLPurifier_URIFilter
+{
+ /**
+ * @type string
+ */
+ public $name = 'MakeAbsolute';
+
+ /**
+ * @type
+ */
+ protected $base;
+
+ /**
+ * @type array
+ */
+ protected $basePathStack = array();
+
+ /**
+ * @param HTMLPurifier_Config $config
+ * @return bool
+ */
+ public function prepare($config)
+ {
+ $def = $config->getDefinition('URI');
+ $this->base = $def->base;
+ if (is_null($this->base)) {
+ trigger_error(
+ 'URI.MakeAbsolute is being ignored due to lack of ' .
+ 'value for URI.Base configuration',
+ E_USER_WARNING
+ );
+ return false;
+ }
+ $this->base->fragment = null; // fragment is invalid for base URI
+ $stack = explode('/', $this->base->path);
+ array_pop($stack); // discard last segment
+ $stack = $this->_collapseStack($stack); // do pre-parsing
+ $this->basePathStack = $stack;
+ return true;
+ }
+
+ /**
+ * @param HTMLPurifier_URI $uri
+ * @param HTMLPurifier_Config $config
+ * @param HTMLPurifier_Context $context
+ * @return bool
+ */
+ public function filter(&$uri, $config, $context)
+ {
+ if (is_null($this->base)) {
+ return true;
+ } // abort early
+ if ($uri->path === '' && is_null($uri->scheme) &&
+ is_null($uri->host) && is_null($uri->query) && is_null($uri->fragment)) {
+ // reference to current document
+ $uri = clone $this->base;
+ return true;
+ }
+ if (!is_null($uri->scheme)) {
+ // absolute URI already: don't change
+ if (!is_null($uri->host)) {
+ return true;
+ }
+ $scheme_obj = $uri->getSchemeObj($config, $context);
+ if (!$scheme_obj) {
+ // scheme not recognized
+ return false;
+ }
+ if (!$scheme_obj->hierarchical) {
+ // non-hierarchal URI with explicit scheme, don't change
+ return true;
+ }
+ // special case: had a scheme but always is hierarchical and had no authority
+ }
+ if (!is_null($uri->host)) {
+ // network path, don't bother
+ return true;
+ }
+ if ($uri->path === '') {
+ $uri->path = $this->base->path;
+ } elseif ($uri->path[0] !== '/') {
+ // relative path, needs more complicated processing
+ $stack = explode('/', $uri->path);
+ $new_stack = array_merge($this->basePathStack, $stack);
+ if ($new_stack[0] !== '' && !is_null($this->base->host)) {
+ array_unshift($new_stack, '');
+ }
+ $new_stack = $this->_collapseStack($new_stack);
+ $uri->path = implode('/', $new_stack);
+ } else {
+ // absolute path, but still we should collapse
+ $uri->path = implode('/', $this->_collapseStack(explode('/', $uri->path)));
+ }
+ // re-combine
+ $uri->scheme = $this->base->scheme;
+ if (is_null($uri->userinfo)) {
+ $uri->userinfo = $this->base->userinfo;
+ }
+ if (is_null($uri->host)) {
+ $uri->host = $this->base->host;
+ }
+ if (is_null($uri->port)) {
+ $uri->port = $this->base->port;
+ }
+ return true;
+ }
+
+ /**
+ * Resolve dots and double-dots in a path stack
+ * @param array $stack
+ * @return array
+ */
+ private function _collapseStack($stack)
+ {
+ $result = array();
+ $is_folder = false;
+ for ($i = 0; isset($stack[$i]); $i++) {
+ $is_folder = false;
+ // absorb an internally duplicated slash
+ if ($stack[$i] == '' && $i && isset($stack[$i + 1])) {
+ continue;
+ }
+ if ($stack[$i] == '..') {
+ if (!empty($result)) {
+ $segment = array_pop($result);
+ if ($segment === '' && empty($result)) {
+ // error case: attempted to back out too far:
+ // restore the leading slash
+ $result[] = '';
+ } elseif ($segment === '..') {
+ $result[] = '..'; // cannot remove .. with ..
+ }
+ } else {
+ // relative path, preserve the double-dots
+ $result[] = '..';
+ }
+ $is_folder = true;
+ continue;
+ }
+ if ($stack[$i] == '.') {
+ // silently absorb
+ $is_folder = true;
+ continue;
+ }
+ $result[] = $stack[$i];
+ }
+ if ($is_folder) {
+ $result[] = '';
+ }
+ return $result;
+ }
+}
+
+// vim: et sw=4 sts=4