729dccb7f8
Split ResolveResult from Resolve.php Split up Device.php Signed-off-by: Diederik de Groot <ddegroot@talon.nl>
136 lines
4.3 KiB
PHP
136 lines
4.3 KiB
PHP
<?php declare(strict_types=1);
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namespace PROVISION;
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use PROVISION\ResolveResult as ResolveResult;
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use PROVISION\ResolveCache as ResolveCache;
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use PROVISION\Utils as Utils;
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/* Todo:
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✔️ setup logging
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✔️ read config.file
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✔?️ improve error handling
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✔️? secure urlencoding/urldecoding
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✔️? don't allow browsing
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- check source ip-range
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- check HTTPHeader for known BrowserTypes
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- Could use some more test-cases, especially error ones
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*/
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class Resolve {
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private $isDirty = FALSE;
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private $cache;
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private $config;
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function __construct($config) {
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$this->config = $config;
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$this->cache = new ResolveCache\FileCache($this->config['main']['cache_filename']);
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if ($this->cache->isDirty()) {
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$this->rebuildCache();
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}
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}
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public function searchForFile($filename) {
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$path = "";
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foreach($this->config['subdirs'] as $key => $value) {
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if ($key === "firmware" || $key === "data" || $key === "etc") {
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continue;
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}
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$path = realpath($this->config['main']['base_path'] . DIRECTORY_SEPARATOR . $value['path'] . DIRECTORY_SEPARATOR . $filename);
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if (!$path) {
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print("path: '" . $this->config['main']['base_path'] . DIRECTORY_SEPARATOR . $value['path'] . DIRECTORY_SEPARATOR . $filename . "' not found\n");
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return ResolveResult::FileNotFound;
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}
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$this->cache->addFile($filename, $path);
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return $path;
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}
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Utils::log_error("File '$filename' does not exist");
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return ResolveResult::FileNotFound;
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}
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public function rebuildCache() {
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Utils::log_debug("Rebuilding Cache, standby...");
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foreach($this->config['subdirs'] as $key =>$value) {
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if ($key === "data" || $key === "etc") {
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continue;
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}
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$path = realpath($this->config['main']['base_path'] . DIRECTORY_SEPARATOR . $value['path'] . DIRECTORY_SEPARATOR);
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if (!$path) {
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print("path: '" . $this->config['main']['base_path'] . DIRECTORY_SEPARATOR . $value['path'] . "' not found\n");
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break;
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}
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$dir_iterator = new \RecursiveDirectoryIterator($path);
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$filter = new \RecursiveCallbackFilterIterator($dir_iterator, function ($current, $key, $iterator) {
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// Skip hidden files and directories.
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if ($current->getFilename()[0] === '.' || $current->getFilename() == "bak") {
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return FALSE;
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}
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return TRUE;
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});
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$iterator = new \RecursiveIteratorIterator($filter, \RecursiveIteratorIterator::SELF_FIRST);
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foreach ($iterator as $file) {
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if ($file->isFile()) {
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if ($value['strip']) {
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$this->cache->addFile($file->getFileName(), $file->getPathname());
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} else {
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$subdir = basename(dirname($file->getPathname()));
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$this->cache->addFile($subdir. DIRECTORY_SEPARATOR . $file->getFileName(), $file->getPathname());
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}
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}
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}
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}
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$this->isDirty = TRUE;
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}
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public function validateRequest($request) {
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/* make sure request does not startwith or contain: "/", "../" or "/./" */
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/* make sure request only starts with filename or one of $config[$subdir]['locale'] or $config[$subdir]['wallpaper'] */
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/* check uri/url decode */
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if (!$request || empty($request)) {
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Utils::log_error("Request is empty");
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return ResolveResult::EmptyRequest;
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}
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if (!is_string($request)) {
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Utils::log_error("Request is not a string");
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return ResolveResult::RequestNotAString;
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}
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Utils::log_debug($request . ":" . escapeshellarg($request) . ":" . Utils::utf8_urldecode($request) . "\n");
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$escaped_request = escapeshellarg(Utils::utf8_urldecode($request));
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if ($escaped_request !== "'" . $request . "'") {
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Utils::log_error("Request '$request' contains invalid characters");
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return ResolveResult::RequestContainsInvalidChar;
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}
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if (strstr($escaped_request, "..")) {
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Utils::log_error("Request '$request' contains '..'");
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return ResolveResult::RequestContainsPathWalk;
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}
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return ResolveResult::Ok;
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}
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public function resolve($request) /* canthrow */ {
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$path = '';
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$result = $this->validateRequest($request);
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if ($result !== ResolveResult::Ok) {
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return $result;
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}
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if (($path = $this->cache->getPath($request))) {
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if (!file_exists($path)) {
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$this->cache->removeFile($request);
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Utils::log_error("File '$request' does not exist on FS");
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return ResolveResult::FileNotFound;
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}
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return $path;
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}
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if ($this->searchForFile($request)) {
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$path = $this->cache->getPath($request);
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}
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return $path;
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}
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/* temporary */
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function printCache() {
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print_r($this->cache);
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}
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}
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?>
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