Implement URL parsing/unparsing per RFC 3986.
- Section 5.3 Component Recomposition in RFC 3986 makes a differentiation between undefined components and empty components that the built-in parse_url in python does not. This patch deals with that issue and ensures, for instance, that empty queries and fragments are detected.
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Dave Longley
parent
fed40914c8
commit
1a9c6bffdd
165
jsonld.php
165
jsonld.php
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@ -506,59 +506,45 @@ function jsonld_parse_url($url) {
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$url = '';
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$url = '';
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}
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}
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$rval = parse_url($url);
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$keys = array(
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'href', 'protocol', 'scheme', '?authority', 'authority',
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'?auth', 'auth', 'user', 'pass', 'host', '?port', 'port', 'path',
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'?query', 'query', '?fragment', 'fragment');
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$regex = "/^(([^:\/?#]+):)?(\/\/(((([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(:(\d*))?))?([^?#]*)(\?([^#]*))?(#(.*))?/";
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preg_match($regex, $url, $match);
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// malformed url
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$rval = array();
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if($rval === false) {
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$flags = array();
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$rval = array();
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$len = count($keys);
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}
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for($i = 0; $i < $len; ++$i) {
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$key = $keys[$i];
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$rval['href'] = $url;
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if(strpos($key, '?') === 0) {
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if(!isset($rval['scheme'])) {
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$flags[substr($key, 1)] = !empty($match[$i]);
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$rval['scheme'] = '';
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} else if(!isset($match[$i])) {
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$rval['protocol'] = '';
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$rval[$key] = null;
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} else {
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$rval['protocol'] = $rval['scheme'] . ':';
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}
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if(!isset($rval['host'])) {
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$rval['host'] = '';
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}
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if(!isset($rval['path'])) {
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$rval['path'] = '';
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}
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if(isset($rval['user']) || isset($rval['pass'])) {
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$rval['auth'] = '';
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if(isset($rval['user'])) {
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$rval['auth'] = $rval['user'];
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}
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if(isset($rval['pass'])) {
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$rval['auth'] .= ":{$rval['pass']}";
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}
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}
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// parse authority for unparsed relative network-path reference
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if(strpos($rval['href'], ':') === false &&
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strpos($rval['href'], '//') === 0 && $rval['host'] === '') {
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// must parse authority from pathname
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$rval['path'] = substr($rval['path'], 2);
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$idx = strpos($rval['path'], '/');
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if($idx === false) {
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$rval['authority'] = $rval['path'];
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$rval['path'] = '';
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} else {
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} else {
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$rval['authority'] = substr($rval['path'], 0, $idx);
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$rval[$key] = $match[$i];
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$rval['path'] = substr($rval['path'], $idx);
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}
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} else {
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$rval['authority'] = $rval['host'];
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if(isset($rval['port'])) {
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$rval['authority'] .= ":{$rval['port']}";
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}
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if(isset($rval['auth'])) {
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$rval['authority'] = "{$rval['auth']}@{$rval['authority']}";
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}
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}
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}
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}
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if(!$flags['authority']) {
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$rval['authority'] = null;
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}
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if(!$flags['auth']) {
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$rval['auth'] = $rval['user'] = $rval['pass'] = null;
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}
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if(!$flags['port']) {
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$rval['port'] = null;
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}
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if(!$flags['query']) {
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$rval['query'] = null;
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}
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if(!$flags['fragment']) {
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$rval['fragment'] = null;
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}
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$rval['normalizedPath'] = jsonld_remove_dot_segments(
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$rval['normalizedPath'] = jsonld_remove_dot_segments(
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$rval['path'], $rval['authority'] !== '');
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$rval['path'], !!$rval['authority']);
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return $rval;
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return $rval;
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}
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}
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@ -628,47 +614,66 @@ function jsonld_prepend_base($base, $iri) {
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// parse given IRI
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// parse given IRI
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$rel = jsonld_parse_url($iri);
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$rel = jsonld_parse_url($iri);
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// start hierarchical part
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// per RFC3986 5.2.2
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$hierPart = $base['protocol'];
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$transform = array('protocol' => $base['protocol']);
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if($rel['authority']) {
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$hierPart .= "//{$rel['authority']}";
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} else if($base['href'] !== '') {
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$hierPart .= "//{$base['authority']}";
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}
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// per RFC3986 normalize
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if($rel['authority'] !== null) {
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$transform['authority'] = $rel['authority'];
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// IRI represents an absolute path
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$transform['path'] = $rel['path'];
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if(strpos($rel['path'], '/') === 0) {
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$transform['query'] = $rel['query'];
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$path = $rel['path'];
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} else {
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} else {
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$path = $base['path'];
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$transform['authority'] = $base['authority'];
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// append relative path to the end of the last directory from base
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if($rel['path'] === '') {
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if($rel['path'] !== '') {
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$transform['path'] = $base['path'];
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$idx = strrpos($path, '/');
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if($rel['query'] !== null) {
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$idx = ($idx === false) ? 0 : $idx + 1;
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$transform['query'] = $rel['query'];
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$path = substr($path, 0, $idx);
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} else {
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if(strlen($path) > 0 && substr($path, -1) !== '/') {
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$transform['query'] = $base['query'];
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$path .= '/';
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}
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}
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$path .= $rel['path'];
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} else {
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if(strpos($rel['path'], '/') === 0) {
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// IRI represents an absolute path
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$transform['path'] = $rel['path'];
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} else {
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// merge paths
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$path = $base['path'];
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// append relative path to the end of the last directory from base
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if($rel['path'] !== '') {
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$idx = strrpos($path, '/');
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$idx = ($idx === false) ? 0 : $idx + 1;
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$path = substr($path, 0, $idx);
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if(strlen($path) > 0 && substr($path, -1) !== '/') {
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$path .= '/';
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}
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$path .= $rel['path'];
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}
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$transform['path'] = $path;
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}
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$transform['query'] = $rel['query'];
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}
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}
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}
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}
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// remove slashes and dots in path
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// remove slashes and dots in path
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$path = jsonld_remove_dot_segments($path, $hierPart !== '');
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$transform['path'] = jsonld_remove_dot_segments(
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$transform['path'], !!$transform['authority']);
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// add query and hash
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// construct URL
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if(isset($rel['query'])) {
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$rval = $transform['protocol'];
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$path .= "?{$rel['query']}";
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if($transform['authority'] !== null) {
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$rval .= '//' . $transform['authority'];
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}
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}
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if(isset($rel['fragment'])) {
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$rval .= $transform['path'];
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$path .= "#{$rel['fragment']}";
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if($transform['query'] !== null) {
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$rval .= '?' . $transform['query'];
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}
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if($rel['fragment'] !== null) {
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$rval .= '#' . $rel['fragment'];
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}
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}
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$rval = $hierPart . $path;
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// handle empty base
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if($rval === '') {
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if($rval === '') {
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$rval = './';
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$rval = './';
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}
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}
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@ -716,7 +721,7 @@ function jsonld_remove_base($base, $iri) {
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// is a hash or query)
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// is a hash or query)
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$base_segments = explode('/', $base['normalizedPath']);
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$base_segments = explode('/', $base['normalizedPath']);
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$iri_segments = explode('/', $rel['normalizedPath']);
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$iri_segments = explode('/', $rel['normalizedPath']);
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$last = (isset($rel['query']) || isset($rel['fragment'])) ? 0 : 1;
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$last = ($rel['query'] || $rel['fragment']) ? 0 : 1;
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while(count($base_segments) > 0 && count($iri_segments) > $last) {
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while(count($base_segments) > 0 && count($iri_segments) > $last) {
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if($base_segments[0] !== $iri_segments[0]) {
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if($base_segments[0] !== $iri_segments[0]) {
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break;
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break;
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@ -740,10 +745,10 @@ function jsonld_remove_base($base, $iri) {
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$rval .= implode('/', $iri_segments);
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$rval .= implode('/', $iri_segments);
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// add query and hash
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// add query and hash
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if(isset($rel['query'])) {
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if($rel['query'] !== null) {
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$rval .= "?{$rel['query']}";
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$rval .= "?{$rel['query']}";
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}
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}
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if(isset($rel['fragment'])) {
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if($rel['fragment'] !== null) {
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$rval .= "#{$rel['fragment']}";
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$rval .= "#{$rel['fragment']}";
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}
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}
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