670 lines
19 KiB
PHP
670 lines
19 KiB
PHP
<?php
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
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* Misc *
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\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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const DATA_DIR = "data";
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function mtimefile(string $file): string
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{
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$data_href = get_base_href();
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$mtime = filemtime($file);
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return "$data_href/$file?$mtime";
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}
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function get_theme(): string
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{
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global $config;
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$theme = $config->get_string(SetupConfig::THEME, "default");
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if (!file_exists("themes/$theme")) {
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$theme = "default";
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}
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return $theme;
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}
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function contact_link(): ?string
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{
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global $config;
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$text = $config->get_string('contact_link');
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if (is_null($text)) {
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return null;
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}
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if (
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startsWith($text, "http:") ||
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startsWith($text, "https:") ||
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startsWith($text, "mailto:")
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) {
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return $text;
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}
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if (strpos($text, "@")) {
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return "mailto:$text";
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}
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if (strpos($text, "/")) {
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return "http://$text";
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}
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return $text;
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}
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/**
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* Check if HTTPS is enabled for the server.
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*/
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function is_https_enabled(): bool
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{
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return (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off');
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}
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/**
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* Compare two Block objects, used to sort them before being displayed
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*/
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function blockcmp(Block $a, Block $b): int
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{
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if ($a->position == $b->position) {
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return 0;
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} else {
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return ($a->position > $b->position);
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}
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}
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/**
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* Figure out PHP's internal memory limit
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*/
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function get_memory_limit(): int
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{
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global $config;
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// thumbnail generation requires lots of memory
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$default_limit = 8*1024*1024; // 8 MB of memory is PHP's default.
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$shimmie_limit = parse_shorthand_int($config->get_int(MediaConfig::MEM_LIMIT));
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if ($shimmie_limit < 3*1024*1024) {
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// we aren't going to fit, override
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$shimmie_limit = $default_limit;
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}
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/*
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Get PHP's configured memory limit.
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Note that this is set to -1 for NO memory limit.
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http://ca2.php.net/manual/en/ini.core.php#ini.memory-limit
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*/
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$memory = parse_shorthand_int(ini_get("memory_limit"));
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if ($memory == -1) {
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// No memory limit.
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// Return the larger of the set limits.
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return max($shimmie_limit, $default_limit);
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} else {
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// PHP has a memory limit set.
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if ($shimmie_limit > $memory) {
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// Shimmie wants more memory than what PHP is currently set for.
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// Attempt to set PHP's memory limit.
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if (ini_set("memory_limit", $shimmie_limit) === false) {
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/* We can't change PHP's limit, oh well, return whatever its currently set to */
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return $memory;
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}
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$memory = parse_shorthand_int(ini_get("memory_limit"));
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}
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// PHP's memory limit is more than Shimmie needs.
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return $memory; // return the current setting
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}
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}
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/**
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* Get the currently active IP, masked to make it not change when the last
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* octet or two change, for use in session cookies and such
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*/
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function get_session_ip(Config $config): string
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{
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$mask = $config->get_string("session_hash_mask", "255.255.0.0");
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$addr = $_SERVER['REMOTE_ADDR'];
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$addr = inet_ntop(inet_pton($addr) & inet_pton($mask));
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return $addr;
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}
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/**
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* Set (or extend) a flash-message cookie.
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*
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* This can optionally be done at the same time as saving a log message with log_*()
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*
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* Generally one should flash a message in onPageRequest and log a message wherever
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* the action actually takes place (eg onWhateverElse) - but much of the time, actions
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* are taken from within onPageRequest...
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*/
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function flash_message(string $text, string $type="info"): void
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{
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global $page;
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$current = $page->get_cookie("flash_message");
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if ($current) {
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$text = $current . "\n" . $text;
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}
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# the message should be viewed pretty much immediately,
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# so 60s timeout should be more than enough
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$page->add_cookie("flash_message", $text, time()+60, "/");
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}
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/**
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* A shorthand way to send a TextFormattingEvent and get the results.
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*/
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function format_text(string $string): string
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{
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$tfe = new TextFormattingEvent($string);
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send_event($tfe);
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return $tfe->formatted;
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}
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/**
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* Generates the path to a file under the data folder based on the file's hash.
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* This process creates subfolders based on octet pairs from the file's hash.
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* The calculated folder follows this pattern data/$base/octet_pairs/$hash
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* @param string $base
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* @param string $hash
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* @param bool $create
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* @param int $splits The number of octet pairs to split the hash into. Caps out at strlen($hash)/2.
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* @return string
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*/
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function warehouse_path(string $base, string $hash, bool $create=true, int $splits = WH_SPLITS): string
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{
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$dirs =[DATA_DIR, $base];
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$splits = min($splits, strlen($hash) / 2);
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for ($i = 0; $i < $splits; $i++) {
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$dirs[] = substr($hash, $i * 2, 2);
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}
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$dirs[] = $hash;
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$pa = join_path(...$dirs);
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if ($create && !file_exists(dirname($pa))) {
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mkdir(dirname($pa), 0755, true);
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}
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return $pa;
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}
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/**
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* Determines the path to the specified file in the data folder.
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*/
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function data_path(string $filename, bool $create = true): string
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{
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$filename = join_path("data", $filename);
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if ($create&&!file_exists(dirname($filename))) {
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mkdir(dirname($filename), 0755, true);
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}
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return $filename;
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}
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function transload(string $url, string $mfile): ?array
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{
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global $config;
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if ($config->get_string("transload_engine") === "curl" && function_exists("curl_init")) {
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$ch = curl_init($url);
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$fp = fopen($mfile, "w");
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
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curl_setopt($ch, CURLOPT_VERBOSE, 1);
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curl_setopt($ch, CURLOPT_HEADER, 1);
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curl_setopt($ch, CURLOPT_REFERER, $url);
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curl_setopt($ch, CURLOPT_USERAGENT, "Shimmie-".VERSION);
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curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
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$response = curl_exec($ch);
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$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
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$headers = http_parse_headers(implode("\n", preg_split('/\R/', rtrim(substr($response, 0, $header_size)))));
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$body = substr($response, $header_size);
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curl_close($ch);
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fwrite($fp, $body);
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fclose($fp);
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return $headers;
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}
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if ($config->get_string("transload_engine") === "wget") {
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$s_url = escapeshellarg($url);
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$s_mfile = escapeshellarg($mfile);
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system("wget --no-check-certificate $s_url --output-document=$s_mfile");
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return file_exists($mfile) ? ["ok"=>"true"] : null;
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}
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if ($config->get_string("transload_engine") === "fopen") {
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$fp_in = @fopen($url, "r");
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$fp_out = fopen($mfile, "w");
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if (!$fp_in || !$fp_out) {
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return null;
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}
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$length = 0;
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while (!feof($fp_in) && $length <= $config->get_int('upload_size')) {
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$data = fread($fp_in, 8192);
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$length += strlen($data);
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fwrite($fp_out, $data);
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}
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fclose($fp_in);
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fclose($fp_out);
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$headers = http_parse_headers(implode("\n", $http_response_header));
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return $headers;
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}
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return null;
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}
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/**
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* Get the active contents of a .php file
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*/
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function manual_include(string $fname): ?string
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{
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static $included = [];
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if (!file_exists($fname)) {
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return null;
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}
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if (in_array($fname, $included)) {
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return null;
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}
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$included[] = $fname;
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print "$fname\n";
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$text = file_get_contents($fname);
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// we want one continuous file
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$text = str_replace('<'.'?php', '', $text);
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$text = str_replace('?'.'>', '', $text);
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// most requires are built-in, but we want /lib separately
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$text = str_replace('require_', '// require_', $text);
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$text = str_replace('// require_once "lib', 'require_once "lib', $text);
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// @include_once is used for user-creatable config files
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$text = preg_replace('/@include_once "(.*)";/e', "manual_include('$1')", $text);
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return $text;
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}
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function path_to_tags(string $path): string
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{
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$matches = [];
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$tags = [];
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if (preg_match("/\d+ - (.+)\.([a-zA-Z0-9]+)/", basename($path), $matches)) {
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$tags = explode(" ", $matches[1]);
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}
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$path = dirname($path);
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$path = str_replace(";", ":", $path);
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$path = str_replace("__", " ", $path);
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$category = "";
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foreach (explode("/", $path) as $dir) {
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$category_to_inherit = "";
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foreach (explode(" ", $dir) as $tag) {
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$tag = trim($tag);
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if ($tag=="") {
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continue;
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}
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if (substr_compare($tag, ":", -1) === 0) {
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// This indicates a tag that ends in a colon,
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// which is for inheriting to tags on the subfolder
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$category_to_inherit = $tag;
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} else {
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if ($category!=""&&strpos($tag, ":") === false) {
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// This indicates that category inheritance is active,
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// and we've encountered a tag that does not specify a category.
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// So we attach the inherited category to the tag.
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$tag = $category.$tag;
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}
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$tags[] = $tag;
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}
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}
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// Category inheritance only works on the immediate subfolder,
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// so we hold a category until the next iteration, and then set
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// it back to an empty string after that iteration
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$category = $category_to_inherit;
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}
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return implode(" ", $tags);
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}
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function join_url(string $base, string ...$paths)
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{
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$output = $base;
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foreach ($paths as $path) {
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$output = rtrim($output, "/");
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$path = ltrim($path, "/");
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$output .= "/".$path;
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}
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return $output;
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}
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function get_dir_contents(string $dir): array
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{
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if (empty($dir)) {
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throw new Exception("dir required");
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}
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if (!is_dir($dir)) {
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return [];
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}
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$results = array_diff(
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scandir(
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$dir
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),
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['..', '.']
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);
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return $results;
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}
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/**
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* Returns amount of files & total size of dir.
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*/
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function scan_dir(string $path): array
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{
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$bytestotal = 0;
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$nbfiles = 0;
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$ite = new RecursiveDirectoryIterator(
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$path,
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FilesystemIterator::KEY_AS_PATHNAME |
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FilesystemIterator::CURRENT_AS_FILEINFO |
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FilesystemIterator::SKIP_DOTS
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);
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foreach (new RecursiveIteratorIterator($ite) as $filename => $cur) {
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try {
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$filesize = $cur->getSize();
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$bytestotal += $filesize;
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$nbfiles++;
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} catch (RuntimeException $e) {
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// This usually just means that the file got eaten by the import
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continue;
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}
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}
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$size_mb = $bytestotal / 1048576; // to mb
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$size_mb = number_format($size_mb, 2, '.', '');
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return ['path' => $path, 'total_files' => $nbfiles, 'total_mb' => $size_mb];
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}
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
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* Debugging functions *
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\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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// SHIT by default this returns the time as a string. And it's not even a
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// string representation of a number, it's two numbers separated by a space.
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// What the fuck were the PHP developers smoking.
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$_shm_load_start = microtime(true);
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/**
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* Collects some debug information (execution time, memory usage, queries, etc)
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* and formats it to stick in the footer of the page.
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*/
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function get_debug_info(): string
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{
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global $cache, $config, $_shm_event_count, $database, $_shm_load_start;
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$i_mem = sprintf("%5.2f", ((memory_get_peak_usage(true)+512)/1024)/1024);
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if ($config->get_string("commit_hash", "unknown") == "unknown") {
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$commit = "";
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} else {
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$commit = " (".$config->get_string("commit_hash").")";
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}
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$time = sprintf("%.2f", microtime(true) - $_shm_load_start);
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$dbtime = sprintf("%.2f", $database->dbtime);
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$i_files = count(get_included_files());
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$hits = $cache->get_hits();
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$miss = $cache->get_misses();
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$debug = "<br>Took $time seconds (db:$dbtime) and {$i_mem}MB of RAM";
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$debug .= "; Used $i_files files and {$database->query_count} queries";
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$debug .= "; Sent $_shm_event_count events";
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$debug .= "; $hits cache hits and $miss misses";
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$debug .= "; Shimmie version ". VERSION . $commit; // .", SCore Version ". SCORE_VERSION;
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return $debug;
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}
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
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* Request initialisation stuff *
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\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/** @privatesection */
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function _version_check(): void
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{
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if (MIN_PHP_VERSION) {
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if (version_compare(phpversion(), MIN_PHP_VERSION, ">=") === false) {
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print "
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Shimmie (SCore Engine) does not support versions of PHP lower than ".MIN_PHP_VERSION."
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(PHP reports that it is version ".phpversion().")
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If your web host is running an older version, they are dangerously out of
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date and you should plan on moving elsewhere.
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";
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exit;
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}
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}
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}
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function _sanitise_environment(): void
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{
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global $_tracer;
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if (TIMEZONE) {
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date_default_timezone_set(TIMEZONE);
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}
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# ini_set('zend.assertions', 1); // generate assertions
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ini_set('assert.exception', 1); // throw exceptions when failed
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if (DEBUG) {
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error_reporting(E_ALL);
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}
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$_tracer = new EventTracer();
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if (COVERAGE) {
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_start_coverage();
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register_shutdown_function("_end_coverage");
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}
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ob_start();
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if (PHP_SAPI === 'cli' || PHP_SAPI == 'phpdbg') {
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if (isset($_SERVER['REMOTE_ADDR'])) {
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die("CLI with remote addr? Confused, not taking the risk.");
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}
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$_SERVER['REMOTE_ADDR'] = "0.0.0.0";
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$_SERVER['HTTP_HOST'] = "<cli command>";
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}
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}
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function _get_themelet_files(string $_theme): array
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{
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$base_themelets = [];
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if (file_exists('themes/'.$_theme.'/custompage.class.php')) {
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$base_themelets[] = 'themes/'.$_theme.'/custompage.class.php';
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}
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$base_themelets[] = 'themes/'.$_theme.'/layout.class.php';
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$base_themelets[] = 'themes/'.$_theme.'/themelet.class.php';
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$ext_themelets = zglob("ext/{".Extension::get_enabled_extensions_as_string()."}/theme.php");
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$custom_themelets = zglob('themes/'.$_theme.'/{'.Extension::get_enabled_extensions_as_string().'}.theme.php');
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return array_merge($base_themelets, $ext_themelets, $custom_themelets);
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}
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/**
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* Used to display fatal errors to the web user.
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*/
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function _fatal_error(Exception $e): void
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{
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$version = VERSION;
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$message = $e->getMessage();
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//$trace = var_dump($e->getTrace());
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//$hash = exec("git rev-parse HEAD");
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//$h_hash = $hash ? "<p><b>Hash:</b> $hash" : "";
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//'.$h_hash.'
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$q = (!isset($e->query) || is_null($e->query)) ? "" : "<p><b>Query:</b> " . html_escape($e->query);
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header("HTTP/1.0 500 Internal Error");
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echo '
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<html>
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<head>
|
|
<title>Internal error - SCore-'.$version.'</title>
|
|
</head>
|
|
<body>
|
|
<h1>Internal Error</h1>
|
|
<p><b>Message:</b> '.html_escape($message).'
|
|
'.$q.'
|
|
<p><b>Version:</b> '.$version.' (on '.phpversion().')
|
|
</body>
|
|
</html>
|
|
';
|
|
}
|
|
|
|
/**
|
|
* Turn ^^ into ^ and ^s into /
|
|
*
|
|
* Necessary because various servers and various clients
|
|
* think that / is special...
|
|
*/
|
|
function _decaret(string $str): string
|
|
{
|
|
$out = "";
|
|
$length = strlen($str);
|
|
for ($i=0; $i<$length; $i++) {
|
|
if ($str[$i] == "^") {
|
|
$i++;
|
|
if ($str[$i] == "^") {
|
|
$out .= "^";
|
|
}
|
|
if ($str[$i] == "s") {
|
|
$out .= "/";
|
|
}
|
|
if ($str[$i] == "b") {
|
|
$out .= "\\";
|
|
}
|
|
} else {
|
|
$out .= $str[$i];
|
|
}
|
|
}
|
|
return $out;
|
|
}
|
|
|
|
function _get_user(): User
|
|
{
|
|
global $config, $page;
|
|
$my_user = null;
|
|
if ($page->get_cookie("user") && $page->get_cookie("session")) {
|
|
$tmp_user = User::by_session($page->get_cookie("user"), $page->get_cookie("session"));
|
|
if (!is_null($tmp_user)) {
|
|
$my_user = $tmp_user;
|
|
}
|
|
}
|
|
if (is_null($my_user)) {
|
|
$my_user = User::by_id($config->get_int("anon_id", 0));
|
|
}
|
|
assert(!is_null($my_user));
|
|
|
|
return $my_user;
|
|
}
|
|
|
|
function _get_query(): string
|
|
{
|
|
return (@$_POST["q"]?:@$_GET["q"])?:"/";
|
|
}
|
|
|
|
|
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
|
|
* Code coverage *
|
|
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
|
|
|
function _start_coverage(): void
|
|
{
|
|
if (function_exists("xdebug_start_code_coverage")) {
|
|
#xdebug_start_code_coverage(XDEBUG_CC_UNUSED|XDEBUG_CC_DEAD_CODE);
|
|
xdebug_start_code_coverage(XDEBUG_CC_UNUSED);
|
|
}
|
|
}
|
|
|
|
function _end_coverage(): void
|
|
{
|
|
if (function_exists("xdebug_get_code_coverage")) {
|
|
// Absolute path is necessary because working directory
|
|
// inside register_shutdown_function is unpredictable.
|
|
$absolute_path = dirname(dirname(__FILE__)) . "/data/coverage";
|
|
if (!file_exists($absolute_path)) {
|
|
mkdir($absolute_path);
|
|
}
|
|
$n = 0;
|
|
$t = time();
|
|
while (file_exists("$absolute_path/$t.$n.log")) {
|
|
$n++;
|
|
}
|
|
file_put_contents("$absolute_path/$t.$n.log", gzdeflate(serialize(xdebug_get_code_coverage())));
|
|
}
|
|
}
|
|
|
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
|
|
* HTML Generation *
|
|
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
|
|
|
/**
|
|
* Give a HTML string which shows an IP (if the user is allowed to see IPs),
|
|
* and a link to ban that IP (if the user is allowed to ban IPs)
|
|
*
|
|
* FIXME: also check that IP ban ext is installed
|
|
*/
|
|
function show_ip(string $ip, string $ban_reason): string
|
|
{
|
|
global $user;
|
|
$u_reason = url_escape($ban_reason);
|
|
$u_end = url_escape("+1 week");
|
|
$ban = $user->can(Permissions::BAN_IP) ? ", <a href='".make_link("ip_ban/list", "ip=$ip&reason=$u_reason&end=$u_end#add")."'>Ban</a>" : "";
|
|
$ip = $user->can(Permissions::VIEW_IP) ? $ip.$ban : "";
|
|
return $ip;
|
|
}
|
|
|
|
/**
|
|
* Make a form tag with relevant auth token and stuff
|
|
*/
|
|
function make_form(string $target, string $method="POST", bool $multipart=false, string $form_id="", string $onsubmit=""): string
|
|
{
|
|
global $user;
|
|
if ($method == "GET") {
|
|
$link = html_escape($target);
|
|
$target = make_link($target);
|
|
$extra_inputs = "<input type='hidden' name='q' value='$link'>";
|
|
} else {
|
|
$extra_inputs = $user->get_auth_html();
|
|
}
|
|
|
|
$extra = empty($form_id) ? '' : 'id="'. $form_id .'"';
|
|
if ($multipart) {
|
|
$extra .= " enctype='multipart/form-data'";
|
|
}
|
|
if ($onsubmit) {
|
|
$extra .= ' onsubmit="'.$onsubmit.'"';
|
|
}
|
|
return '<form action="'.$target.'" method="'.$method.'" '.$extra.'>'.$extra_inputs;
|
|
}
|