You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
513 lines
15 KiB
PHP
513 lines
15 KiB
PHP
<?php
|
|
class UrlHelper {
|
|
static $fetch_last_error;
|
|
static $fetch_last_error_code;
|
|
static $fetch_last_error_content;
|
|
static $fetch_last_content_type;
|
|
static $fetch_last_modified;
|
|
static $fetch_effective_url;
|
|
static $fetch_effective_ip_addr;
|
|
static $fetch_curl_used;
|
|
|
|
static function build_url($parts) {
|
|
$tmp = $parts['scheme'] . "://" . $parts['host'];
|
|
|
|
if (isset($parts['path'])) $tmp .= $parts['path'];
|
|
if (isset($parts['query'])) $tmp .= '?' . $parts['query'];
|
|
if (isset($parts['fragment'])) $tmp .= '#' . $parts['fragment'];
|
|
|
|
return $tmp;
|
|
}
|
|
|
|
/**
|
|
* Converts a (possibly) relative URL to a absolute one.
|
|
*
|
|
* @param string $url Base URL (i.e. from where the document is)
|
|
* @param string $rel_url Possibly relative URL in the document
|
|
*
|
|
* @return string Absolute URL
|
|
*/
|
|
public static function rewrite_relative($url, $rel_url) {
|
|
|
|
$rel_parts = parse_url($rel_url);
|
|
|
|
if (!empty($rel_parts['host']) && !empty($rel_parts['scheme'])) {
|
|
return self::validate($rel_url);
|
|
} else if (strpos($rel_url, "//") === 0) {
|
|
# protocol-relative URL (rare but they exist)
|
|
return self::validate("https:" . $rel_url);
|
|
} else if (strpos($rel_url, "magnet:") === 0) {
|
|
# allow magnet links
|
|
return $rel_url;
|
|
} else {
|
|
$parts = parse_url($url);
|
|
|
|
$rel_parts['host'] = $parts['host'];
|
|
$rel_parts['scheme'] = $parts['scheme'];
|
|
|
|
if (isset($rel_parts['path'])) {
|
|
if (strpos($rel_parts['path'], '/') !== 0)
|
|
$rel_parts['path'] = '/' . $rel_parts['path'];
|
|
|
|
$rel_parts['path'] = str_replace("/./", "/", $rel_parts['path']);
|
|
$rel_parts['path'] = str_replace("//", "/", $rel_parts['path']);
|
|
}
|
|
|
|
return self::validate(self::build_url($rel_parts));
|
|
}
|
|
}
|
|
|
|
// extended filtering involves validation for safe ports and loopback
|
|
static function validate($url, $extended_filtering = false) {
|
|
|
|
$url = clean($url);
|
|
|
|
# fix protocol-relative URLs
|
|
if (strpos($url, "//") === 0)
|
|
$url = "https:" . $url;
|
|
|
|
$tokens = parse_url($url);
|
|
|
|
// this isn't really necessary because filter_var(... FILTER_VALIDATE_URL) requires host and scheme
|
|
// as per https://php.watch/versions/7.3/filter-var-flag-deprecation but it might save time
|
|
if (empty($tokens['host']))
|
|
return false;
|
|
|
|
if (!in_array(strtolower($tokens['scheme']), ['http', 'https']))
|
|
return false;
|
|
|
|
//convert IDNA hostname to punycode if possible
|
|
if (function_exists("idn_to_ascii")) {
|
|
if (mb_detect_encoding($tokens['host']) != 'ASCII') {
|
|
if (defined('IDNA_NONTRANSITIONAL_TO_ASCII') && defined('INTL_IDNA_VARIANT_UTS46')) {
|
|
$tokens['host'] = idn_to_ascii($tokens['host'], IDNA_NONTRANSITIONAL_TO_ASCII, INTL_IDNA_VARIANT_UTS46);
|
|
} else {
|
|
$tokens['host'] = idn_to_ascii($tokens['host']);
|
|
}
|
|
}
|
|
}
|
|
|
|
// separate set of tokens with urlencoded 'path' because filter_var() rightfully fails on non-latin characters
|
|
// (used for validation only, we actually request the original URL, in case of urlencode breaking it)
|
|
$tokens_filter_var = $tokens;
|
|
|
|
if ($tokens['path'] ?? false) {
|
|
$tokens_filter_var['path'] = implode("/",
|
|
array_map("rawurlencode",
|
|
array_map("rawurldecode",
|
|
explode("/", $tokens['path']))));
|
|
}
|
|
|
|
$url = self::build_url($tokens);
|
|
$url_filter_var = self::build_url($tokens_filter_var);
|
|
|
|
if (filter_var($url_filter_var, FILTER_VALIDATE_URL) === false)
|
|
return false;
|
|
|
|
if ($extended_filtering) {
|
|
if (!in_array($tokens['port'] ?? '', [80, 443, '']))
|
|
return false;
|
|
|
|
if (strtolower($tokens['host']) == 'localhost' || $tokens['host'] == '::1' || strpos($tokens['host'], '127.') === 0)
|
|
return false;
|
|
}
|
|
|
|
return $url;
|
|
}
|
|
|
|
static function resolve_redirects($url, $timeout, $nest = 0) {
|
|
|
|
// too many redirects
|
|
if ($nest > 10)
|
|
return false;
|
|
|
|
if (version_compare(PHP_VERSION, '7.1.0', '>=')) {
|
|
$context_options = array(
|
|
'http' => array(
|
|
'header' => array(
|
|
'Connection: close'
|
|
),
|
|
'method' => 'HEAD',
|
|
'timeout' => $timeout,
|
|
'protocol_version'=> 1.1)
|
|
);
|
|
|
|
if (Config::get(Config::HTTP_PROXY)) {
|
|
$context_options['http']['request_fulluri'] = true;
|
|
$context_options['http']['proxy'] = Config::get(Config::HTTP_PROXY);
|
|
}
|
|
|
|
$context = stream_context_create($context_options);
|
|
|
|
$headers = get_headers($url, 0, $context);
|
|
} else {
|
|
$headers = get_headers($url, 0);
|
|
}
|
|
|
|
if (is_array($headers)) {
|
|
$headers = array_reverse($headers); // last one is the correct one
|
|
|
|
foreach($headers as $header) {
|
|
if (stripos($header, 'Location:') === 0) {
|
|
$url = self::rewrite_relative($url, trim(substr($header, strlen('Location:'))));
|
|
|
|
return self::resolve_redirects($url, $timeout, $nest + 1);
|
|
}
|
|
}
|
|
|
|
return $url;
|
|
}
|
|
|
|
// request failed?
|
|
return false;
|
|
}
|
|
|
|
// TODO: max_size currently only works for CURL transfers
|
|
// TODO: multiple-argument way is deprecated, first parameter is a hash now
|
|
public static function fetch($options /* previously: 0: $url , 1: $type = false, 2: $login = false, 3: $pass = false,
|
|
4: $post_query = false, 5: $timeout = false, 6: $timestamp = 0, 7: $useragent = false*/) {
|
|
|
|
self::$fetch_last_error = false;
|
|
self::$fetch_last_error_code = -1;
|
|
self::$fetch_last_error_content = "";
|
|
self::$fetch_last_content_type = "";
|
|
self::$fetch_curl_used = false;
|
|
self::$fetch_last_modified = "";
|
|
self::$fetch_effective_url = "";
|
|
self::$fetch_effective_ip_addr = "";
|
|
|
|
if (!is_array($options)) {
|
|
|
|
// falling back on compatibility shim
|
|
$option_names = [ "url", "type", "login", "pass", "post_query", "timeout", "last_modified", "useragent" ];
|
|
$tmp = [];
|
|
|
|
for ($i = 0; $i < func_num_args(); $i++) {
|
|
$tmp[$option_names[$i]] = func_get_arg($i);
|
|
}
|
|
|
|
$options = $tmp;
|
|
|
|
/*$options = array(
|
|
"url" => func_get_arg(0),
|
|
"type" => @func_get_arg(1),
|
|
"login" => @func_get_arg(2),
|
|
"pass" => @func_get_arg(3),
|
|
"post_query" => @func_get_arg(4),
|
|
"timeout" => @func_get_arg(5),
|
|
"timestamp" => @func_get_arg(6),
|
|
"useragent" => @func_get_arg(7)
|
|
); */
|
|
}
|
|
|
|
$url = $options["url"];
|
|
$type = isset($options["type"]) ? $options["type"] : false;
|
|
$login = isset($options["login"]) ? $options["login"] : false;
|
|
$pass = isset($options["pass"]) ? $options["pass"] : false;
|
|
$post_query = isset($options["post_query"]) ? $options["post_query"] : false;
|
|
$timeout = isset($options["timeout"]) ? $options["timeout"] : false;
|
|
$last_modified = isset($options["last_modified"]) ? $options["last_modified"] : "";
|
|
$useragent = isset($options["useragent"]) ? $options["useragent"] : false;
|
|
$followlocation = isset($options["followlocation"]) ? $options["followlocation"] : true;
|
|
$max_size = isset($options["max_size"]) ? $options["max_size"] : Config::get(Config::MAX_DOWNLOAD_FILE_SIZE); // in bytes
|
|
$http_accept = isset($options["http_accept"]) ? $options["http_accept"] : false;
|
|
$http_referrer = isset($options["http_referrer"]) ? $options["http_referrer"] : false;
|
|
|
|
$url = ltrim($url, ' ');
|
|
$url = str_replace(' ', '%20', $url);
|
|
|
|
$url = self::validate($url, true);
|
|
|
|
if (!$url) {
|
|
self::$fetch_last_error = "Requested URL failed extended validation.";
|
|
return false;
|
|
}
|
|
|
|
$url_host = parse_url($url, PHP_URL_HOST);
|
|
$ip_addr = gethostbyname($url_host);
|
|
|
|
if (!$ip_addr || strpos($ip_addr, "127.") === 0) {
|
|
self::$fetch_last_error = "URL hostname failed to resolve or resolved to a loopback address ($ip_addr)";
|
|
return false;
|
|
}
|
|
|
|
if (function_exists('curl_init') && !ini_get("open_basedir")) {
|
|
|
|
self::$fetch_curl_used = true;
|
|
|
|
$ch = curl_init($url);
|
|
|
|
if (!$ch) return false;
|
|
|
|
$curl_http_headers = [];
|
|
|
|
if ($last_modified && !$post_query)
|
|
array_push($curl_http_headers, "If-Modified-Since: $last_modified");
|
|
|
|
if ($http_accept)
|
|
array_push($curl_http_headers, "Accept: " . $http_accept);
|
|
|
|
if (count($curl_http_headers) > 0)
|
|
curl_setopt($ch, CURLOPT_HTTPHEADER, $curl_http_headers);
|
|
|
|
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout ? $timeout : Config::get(Config::FILE_FETCH_CONNECT_TIMEOUT));
|
|
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout ? $timeout : Config::get(Config::FILE_FETCH_TIMEOUT));
|
|
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, !ini_get("open_basedir") && $followlocation);
|
|
curl_setopt($ch, CURLOPT_MAXREDIRS, 20);
|
|
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
|
|
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
|
|
curl_setopt($ch, CURLOPT_HEADER, true);
|
|
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
|
|
curl_setopt($ch, CURLOPT_USERAGENT, $useragent ? $useragent :
|
|
SELF_USER_AGENT);
|
|
curl_setopt($ch, CURLOPT_ENCODING, "");
|
|
|
|
if ($http_referrer)
|
|
curl_setopt($ch, CURLOPT_REFERER, $http_referrer);
|
|
|
|
if ($max_size) {
|
|
curl_setopt($ch, CURLOPT_NOPROGRESS, false);
|
|
curl_setopt($ch, CURLOPT_BUFFERSIZE, 16384); // needed to get 5 arguments in progress function?
|
|
|
|
// holy shit closures in php
|
|
// download & upload are *expected* sizes respectively, could be zero
|
|
curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, function($curl_handle, $download_size, $downloaded, $upload_size, $uploaded) use(&$max_size, $url) {
|
|
//Debug::log("[curl progressfunction] $downloaded $max_size", Debug::$LOG_EXTENDED);
|
|
|
|
if ($downloaded > $max_size) {
|
|
Debug::log("curl: reached max size of $max_size bytes requesting $url, aborting.", Debug::LOG_VERBOSE);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
});
|
|
|
|
}
|
|
|
|
if (!ini_get("open_basedir")) {
|
|
curl_setopt($ch, CURLOPT_COOKIEJAR, "/dev/null");
|
|
}
|
|
|
|
if (Config::get(Config::HTTP_PROXY)) {
|
|
curl_setopt($ch, CURLOPT_PROXY, Config::get(Config::HTTP_PROXY));
|
|
}
|
|
|
|
if ($post_query) {
|
|
curl_setopt($ch, CURLOPT_POST, true);
|
|
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_query);
|
|
}
|
|
|
|
if ($login && $pass)
|
|
curl_setopt($ch, CURLOPT_USERPWD, "$login:$pass");
|
|
|
|
$ret = @curl_exec($ch);
|
|
|
|
$headers_length = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
|
|
$headers = explode("\r\n", substr($ret, 0, $headers_length));
|
|
$contents = substr($ret, $headers_length);
|
|
|
|
foreach ($headers as $header) {
|
|
if (strstr($header, ": ") !== false) {
|
|
list ($key, $value) = explode(": ", $header);
|
|
|
|
if (strtolower($key) == "last-modified") {
|
|
self::$fetch_last_modified = $value;
|
|
}
|
|
}
|
|
|
|
if (substr(strtolower($header), 0, 7) == 'http/1.') {
|
|
self::$fetch_last_error_code = (int) substr($header, 9, 3);
|
|
self::$fetch_last_error = $header;
|
|
}
|
|
}
|
|
|
|
if (curl_errno($ch) === 23 || curl_errno($ch) === 61) {
|
|
curl_setopt($ch, CURLOPT_ENCODING, 'none');
|
|
$contents = @curl_exec($ch);
|
|
}
|
|
|
|
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
|
|
self::$fetch_last_content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
|
|
|
|
self::$fetch_effective_url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
|
|
|
|
if (!self::validate(self::$fetch_effective_url, true)) {
|
|
self::$fetch_last_error = "URL received after redirection failed extended validation.";
|
|
|
|
return false;
|
|
}
|
|
|
|
self::$fetch_effective_ip_addr = gethostbyname(parse_url(self::$fetch_effective_url, PHP_URL_HOST));
|
|
|
|
if (!self::$fetch_effective_ip_addr || strpos(self::$fetch_effective_ip_addr, "127.") === 0) {
|
|
self::$fetch_last_error = "URL hostname received after redirection failed to resolve or resolved to a loopback address (".self::$fetch_effective_ip_addr.")";
|
|
|
|
return false;
|
|
}
|
|
|
|
self::$fetch_last_error_code = $http_code;
|
|
|
|
if ($http_code != 200 || $type && strpos(self::$fetch_last_content_type, "$type") === false) {
|
|
|
|
if (curl_errno($ch) != 0) {
|
|
self::$fetch_last_error .= "; " . curl_errno($ch) . " " . curl_error($ch);
|
|
}
|
|
|
|
self::$fetch_last_error_content = $contents;
|
|
curl_close($ch);
|
|
return false;
|
|
}
|
|
|
|
if (!$contents) {
|
|
self::$fetch_last_error = curl_errno($ch) . " " . curl_error($ch);
|
|
curl_close($ch);
|
|
return false;
|
|
}
|
|
|
|
curl_close($ch);
|
|
|
|
$is_gzipped = RSSUtils::is_gzipped($contents);
|
|
|
|
if ($is_gzipped && is_string($contents)) {
|
|
$tmp = @gzdecode($contents);
|
|
|
|
if ($tmp) $contents = $tmp;
|
|
}
|
|
|
|
return $contents;
|
|
} else {
|
|
|
|
self::$fetch_curl_used = false;
|
|
|
|
if ($login && $pass){
|
|
$url_parts = array();
|
|
|
|
preg_match("/(^[^:]*):\/\/(.*)/", $url, $url_parts);
|
|
|
|
$pass = urlencode($pass);
|
|
|
|
if ($url_parts[1] && $url_parts[2]) {
|
|
$url = $url_parts[1] . "://$login:$pass@" . $url_parts[2];
|
|
}
|
|
}
|
|
|
|
// TODO: should this support POST requests or not? idk
|
|
|
|
$context_options = array(
|
|
'http' => array(
|
|
'header' => array(
|
|
'Connection: close'
|
|
),
|
|
'method' => 'GET',
|
|
'ignore_errors' => true,
|
|
'timeout' => $timeout ? $timeout : Config::get(Config::FILE_FETCH_TIMEOUT),
|
|
'protocol_version'=> 1.1)
|
|
);
|
|
|
|
if (!$post_query && $last_modified)
|
|
array_push($context_options['http']['header'], "If-Modified-Since: $last_modified");
|
|
|
|
if ($http_accept)
|
|
array_push($context_options['http']['header'], "Accept: $http_accept");
|
|
|
|
if ($http_referrer)
|
|
array_push($context_options['http']['header'], "Referer: $http_referrer");
|
|
|
|
if (Config::get(Config::HTTP_PROXY)) {
|
|
$context_options['http']['request_fulluri'] = true;
|
|
$context_options['http']['proxy'] = Config::get(Config::HTTP_PROXY);
|
|
}
|
|
|
|
$context = stream_context_create($context_options);
|
|
|
|
$old_error = error_get_last();
|
|
|
|
self::$fetch_effective_url = self::resolve_redirects($url, $timeout ? $timeout : Config::get(Config::FILE_FETCH_CONNECT_TIMEOUT));
|
|
|
|
if (!self::validate(self::$fetch_effective_url, true)) {
|
|
self::$fetch_last_error = "URL received after redirection failed extended validation.";
|
|
|
|
return false;
|
|
}
|
|
|
|
self::$fetch_effective_ip_addr = gethostbyname(parse_url(self::$fetch_effective_url, PHP_URL_HOST));
|
|
|
|
if (!self::$fetch_effective_ip_addr || strpos(self::$fetch_effective_ip_addr, "127.") === 0) {
|
|
self::$fetch_last_error = "URL hostname received after redirection failed to resolve or resolved to a loopback address (".self::$fetch_effective_ip_addr.")";
|
|
|
|
return false;
|
|
}
|
|
|
|
$data = @file_get_contents($url, false, $context);
|
|
|
|
foreach ($http_response_header as $header) {
|
|
if (strstr($header, ": ") !== false) {
|
|
list ($key, $value) = explode(": ", $header);
|
|
|
|
$key = strtolower($key);
|
|
|
|
if ($key == 'content-type') {
|
|
self::$fetch_last_content_type = $value;
|
|
// don't abort here b/c there might be more than one
|
|
// e.g. if we were being redirected -- last one is the right one
|
|
} else if ($key == 'last-modified') {
|
|
self::$fetch_last_modified = $value;
|
|
} else if ($key == 'location') {
|
|
self::$fetch_effective_url = $value;
|
|
}
|
|
}
|
|
|
|
if (substr(strtolower($header), 0, 7) == 'http/1.') {
|
|
self::$fetch_last_error_code = (int) substr($header, 9, 3);
|
|
self::$fetch_last_error = $header;
|
|
}
|
|
}
|
|
|
|
if (self::$fetch_last_error_code != 200) {
|
|
$error = error_get_last();
|
|
|
|
if (($error['message'] ?? '') != ($old_error['message'] ?? '')) {
|
|
self::$fetch_last_error .= "; " . $error["message"];
|
|
}
|
|
|
|
self::$fetch_last_error_content = $data;
|
|
|
|
return false;
|
|
}
|
|
|
|
$is_gzipped = RSSUtils::is_gzipped($data);
|
|
|
|
if ($is_gzipped && $data) {
|
|
$tmp = @gzdecode($data);
|
|
|
|
if ($tmp) $data = $tmp;
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
}
|
|
|
|
public static function url_to_youtube_vid($url) {
|
|
$url = str_replace("youtube.com", "youtube-nocookie.com", $url);
|
|
|
|
$regexps = [
|
|
"/\/\/www\.youtube-nocookie\.com\/v\/([\w-]+)/",
|
|
"/\/\/www\.youtube-nocookie\.com\/embed\/([\w-]+)/",
|
|
"/\/\/www\.youtube-nocookie\.com\/watch?v=([\w-]+)/",
|
|
"/\/\/youtu.be\/([\w-]+)/",
|
|
];
|
|
|
|
foreach ($regexps as $re) {
|
|
$matches = [];
|
|
|
|
if (preg_match($re, $url, $matches)) {
|
|
return $matches[1];
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
}
|