This file is indexed.

/usr/share/php/Sabre/Uri/functions.php is in php-sabre-uri 1.0.1-1build1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
<?php

namespace Sabre\Uri;

/**
 * Resolves relative urls, like a browser would.
 *
 * This function takes a basePath, which itself _may_ also be relative, and
 * then applies the relative path on top of it.
 *
 * @param string $basePath
 * @param string $newPath
 * @return string
 */
function resolve($basePath, $newPath) {

    $base = parse($basePath);
    $delta = parse($newPath);

    $pick = function($part) use ($base, $delta) {

        if ($delta[$part]) {
            return $delta[$part];
        } elseif ($base[$part]) {
            return $base[$part];
        }
        return null;
        
    };

    // If the new path defines a scheme, it's absolute and we can just return
    // that.
    if ($delta['scheme']) {
        return build($delta);
    }

    $newParts = [];

    $newParts['scheme'] = $pick('scheme');
    $newParts['host']   = $pick('host');
    $newParts['port']   = $pick('port');

    $path = '';
    if ($delta['path']) {
        // If the path starts with a slash
        if ($delta['path'][0] === '/') {
            $path = $delta['path'];
        } else {
            // Removing last component from base path.
            $path = $base['path'];
            if (strpos($path, '/') !== false) {
                $path = substr($path, 0, strrpos($path, '/'));
            }
            $path .= '/' . $delta['path'];
        }
    } else {
        $path = $base['path'] ?: '/';
    }
    // Removing .. and .
    $pathParts = explode('/', $path);
    $newPathParts = [];
    foreach($pathParts as $pathPart) {

        switch($pathPart) {
            //case '' :
            case '.' :
                break;
            case '..' :
                array_pop($newPathParts);
                break;
            default :
                $newPathParts[] = $pathPart;
                break;
        }
    }

    $path = implode('/', $newPathParts);

    // If the source url ended with a /, we want to preserve that.
    $newParts['path'] = $path;
    if ($delta['query']) {
        $newParts['query'] = $delta['query'];
    } elseif (!empty($base['query']) && empty($delta['host']) && empty($delta['path'])) {
        // Keep the old query if host and path didn't change
        $newParts['query'] = $base['query'];
    }
    if ($delta['fragment']) {
        $newParts['fragment'] = $delta['fragment'];
    }
    return build($newParts);

}

/**
 * Takes a URI or partial URI as its argument, and normalizes it.
 *
 * After normalizing a URI, you can safely compare it to other URIs.
 * This function will for instance convert a %7E into a tilde, according to
 * rfc3986.
 *
 * It will also change a %3a into a %3A.
 *
 * @param string $uri
 * @return string
 */
function normalize($uri) {

    $parts = parse($uri);

    if (!empty($parts['path'])) {
        $pathParts = explode('/', ltrim($parts['path'], '/'));
        $newPathParts = [];
        foreach($pathParts as $pathPart) {
            switch($pathPart) {
                case '.':
                    // skip
                    break;
                case '..' :
                    // One level up in the hierarchy
                    array_pop($newPathParts);
                    break;
                default :
                    // Ensuring that everything is correctly percent-encoded.
                    $newPathParts[] = rawurlencode(rawurldecode($pathPart));
                    break;
            }
        }
        $parts['path'] = '/' . implode('/', $newPathParts);
    }

    if ($parts['scheme']) {
        $parts['scheme'] = strtolower($parts['scheme']);
        $defaultPorts = [
            'http'  => '80',
            'https' => '443',
        ];

        if (!empty($parts['port']) && isset($defaultPorts[$parts['scheme']]) && $defaultPorts[$parts['scheme']] == $parts['port']) {
            // Removing default ports.
            unset($parts['port']);
        }
        // A few HTTP specific rules.
        switch($parts['scheme']) {
            case 'http' :
            case 'https' :
                if (empty($parts['path'])) {
                    // An empty path is equivalent to / in http.
                    $parts['path'] = '/';
                }
                break;
        }
    }

    if ($parts['host']) $parts['host'] = strtolower($parts['host']);

    return build($parts);

}

/**
 * Parses a URI and returns its individual components.
 *
 * This method largely behaves the same as PHP's parse_url, except that it will
 * return an array with all the array keys, including the ones that are not
 * set by parse_url, which makes it a bit easier to work with.
 *
 * @param string $uri
 * @return array
 */
function parse($uri) {

    return
        parse_url($uri) + [
            'scheme'   => null,
            'host'     => null,
            'path'     => null,
            'port'     => null,
            'user'     => null,
            'query'    => null,
            'fragment' => null,
        ];

}

/**
 * This function takes the components returned from PHP's parse_url, and uses
 * it to generate a new uri.
 *
 * @param array $parts
 * @return string
 */
function build(array $parts) {

    $uri = '';

    $authority = '';
    if (!empty($parts['host'])) {
        $authority = $parts['host'];
        if (!empty($parts['user'])) {
            $authority = $parts['user'] . '@' . $authority;
        }
        if (!empty($parts['port'])) {
            $authority = $authority . ':' . $parts['port'];
        }
    }

    if (!empty($parts['scheme'])) {
        // If there's a scheme, there's also a host.
        $uri = $parts['scheme'] . ':';

    }
    if ($authority) {
        // No scheme, but there is a host.
        $uri .= '//' . $authority;

    }

    if (!empty($parts['path'])) {
        $uri .= $parts['path'];
    }
    if (!empty($parts['query'])) {
        $uri .= '?' . $parts['query'];
    }
    if (!empty($parts['fragment'])) {
        $uri .= '#' . $parts['fragment'];
    }

    return $uri;

}

/**
 * Returns the 'dirname' and 'basename' for a path.
 *
 * The reason there is a custom function for this purpose, is because
 * basename() is locale aware (behaviour changes if C locale or a UTF-8 locale
 * is used) and we need a method that just operates on UTF-8 characters.
 *
 * In addition basename and dirname are platform aware, and will treat
 * backslash (\) as a directory separator on windows.
 *
 * This method returns the 2 components as an array.
 *
 * If there is no dirname, it will return an empty string. Any / appearing at
 * the end of the string is stripped off.
 *
 * @param string $path
 * @return array
 */
function split($path) {

    $matches = [];
    if(preg_match('/^(?:(?:(.*)(?:\/+))?([^\/]+))(?:\/?)$/u', $path, $matches)) {
        return [$matches[1], $matches[2]];
    }
    return [null,null];
    
}