<?php
/*
* @link http://kodcloud.com/
* @author warlee | e-mail:kodcloud@qq.com
* @copyright warlee 2014.(Shanghai)Co.,Ltd
* @license http://kodcloud.com/tools/license/license.txt
*/


/**
 * client ip address
 * 
 * @param boolean $s_type ip类型[ip|long]
 * @return string $ip
 */
function get_client_ip($b_ip = true){
	$arr_ip_header = array( 
		"HTTP_CLIENT_IP",
		"HTTP_X_FORWARDED_FOR",
		"REMOTE_ADDR",
		"HTTP_CDN_SRC_IP",
		"HTTP_PROXY_CLIENT_IP",
		"HTTP_WL_PROXY_CLIENT_IP"
	);
	$client_ip = 'unknown';
	foreach ($arr_ip_header as $key) {
		if (!empty($_SERVER[$key]) && strtolower($_SERVER[$key]) != "unknown") {
			$client_ip = $_SERVER[$key];
			break;
		}
	}
	if ($pos = strpos($client_ip,',')){
		$client_ip = substr($client_ip,$pos+1);
	}
	return $client_ip;
}

function get_url_link($url){
	if(!$url) return "";
	$res = parse_url($url);
	$port = (empty($res["port"]) || $res["port"] == '80')?'':':'.$res["port"];
	return $res['scheme']."://".$res["host"].$port.$res['path'];
}
function get_url_root($url){
	if(!$url) return "";
	$res = parse_url($url);
	$port = (empty($res["port"]) || $res["port"] == '80')?'':':'.$res["port"];
	return $res['scheme']."://".$res["host"].$port.'/';
}
function get_url_domain($url){
	if(!$url) return "";
	$res = parse_url($url);
	return $res["host"];
}
function get_url_scheme($url){
	if(!$url) return "";
	$res = parse_url($url);
	return $res['scheme'];
}

function http_type(){
	if( (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ||
		(isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') ||
		$_SERVER['SERVER_PORT'] === 443 
		){
		return 'https';
	}
	return 'http';
}

function get_host() {
	//兼容子目录反向代理:只能是前端js通过cookie传入到后端进行处理
	if(defined('GLOBAL_DEBUG') && isset($_COOKIE['HOST']) && isset($_COOKIE['APP_HOST'])){
		return $_COOKIE['HOST'];
	}
	$protocol = http_type().'://';
	$url_host = $_SERVER['SERVER_NAME'].($_SERVER['SERVER_PORT']=='80' ? '' : ':'.$_SERVER['SERVER_PORT']);
	$host = isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : $url_host;
	$host = isset($_SERVER['HTTP_X_FORWARDED_HOST']) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : $host;//proxy
	return $protocol.$host;
}
// current request url
function this_url(){
	$url = rtrim(get_host(),'/').'/'.ltrim($_SERVER['REQUEST_URI'],'/');
	return $url;
}

//解决部分主机不兼容问题
function webroot_path($basic_path){
	$webRoot = str_replace($_SERVER['SCRIPT_NAME'],'',$_SERVER['SCRIPT_FILENAME']);
	$webRoot = rtrim(str_replace(array('\\','\/\/','\\\\'),'/',$webRoot),'/').'/';
	if( substr($basic_path,0,strlen($webRoot)) == $webRoot ){
		return $webRoot;
	}

	$webRoot = $_SERVER['DOCUMENT_ROOT'];
	$webRoot = rtrim(str_replace(array('\\','\/\/','\\\\'),'/',$webRoot),'/').'/';
	if( substr($basic_path,0,strlen($webRoot)) == $webRoot ){
		return $webRoot;
	}
	return $basic_path;
}

function ua_has($str){
	if(!isset($_SERVER['HTTP_USER_AGENT'])){
		return false;
	}
	if(strpos($_SERVER['HTTP_USER_AGENT'],$str) ){
		return true;
	}
	return false;
}
function is_wap(){   
	if(!isset($_SERVER['HTTP_USER_AGENT'])){
		return false;
	} 
	if(preg_match('/(up.browser|up.link|mmp|symbian|smartphone|midp|wap|phone|iphone|ipad|ipod|android|xoom|miui)/i', 
		strtolower($_SERVER['HTTP_USER_AGENT']))){
		return true;
	}
	if((isset($_SERVER['HTTP_ACCEPT'])) && 
		(strpos(strtolower($_SERVER['HTTP_ACCEPT']),'application/vnd.wap.xhtml+xml') !== false)){
		return true;
	}
	return false;
}

/**
 * 终止并完成http请求；客户端终止等待完成请求
 * 后续代码可以继续运行；例如日志、统计等代码；后续输出将不再生效；
 */
function http_close(){
	ignore_timeout(0);
	if(function_exists('fastcgi_finish_request')) {
		fastcgi_finish_request();
	} else {
		header("Connection: close");
		header("Content-Length: ".ob_get_length());
		ob_start();
		echo str_pad('',1024*5);
		ob_end_flush();
		flush();		
	}
}

function parse_headers($raw_headers){
	$headers = array();
	$key = '';
	foreach (explode("\n", $raw_headers) as $h) {
		$h = explode(':', $h, 2);
		if (isset($h[1])) {
			if ( ! isset($headers[$h[0]])) {
				$headers[$h[0]] = trim($h[1]);
			} elseif (is_array($headers[$h[0]])) {
				$headers[$h[0]] = array_merge($headers[$h[0]], array(trim($h[1])) );
			} else {
				$headers[$h[0]] = array_merge(array($headers[$h[0]]), array(trim($h[1])) );
			}
			$key = $h[0];
		} else {
			if (substr($h[0], 0, 1) === "\t") {
				$headers[$key] .= "\r\n\t" . trim($h[0]);
			} elseif ( ! $key) {
				$headers[0] = trim($h[0]);
			}
			trim($h[0]);
		}
	}
	return $headers;
}

//多人同时上传同一个文件；或上传到多个服务;
$curlCurrentFile = false;
function curl_progress_bind($file,$uuid='',$download=false){
	if(!$GLOBALS['curlCurrentFile']){
		$cacheFile = TEMP_PATH.'/curlProgress/'.md5($file.$uuid).'.log';
		mk_dir(get_path_father($cacheFile));
		@touch($cacheFile);
		if(!file_exists($cacheFile)){
			return;
		}
		$GLOBALS['curlCurrentFile'] = array(
			'path'		 => $file,
			'uuid'		 => $uuid,
			'time'		 => 0,
			'setNum'	 => 0,
			'cacheFile'	 => $cacheFile,
			'download' 	 => $download
		);
	}
	curl_progress_set(false,0,0,0,0);
}
function curl_progress_set(){
	$fileInfo = $GLOBALS['curlCurrentFile'];
	$file = $fileInfo['path'];
	$cacheFile = $fileInfo['cacheFile'];
	if( !is_array($fileInfo) || 
		mtime() - $fileInfo['time'] <= 0.3){//每300ms做一次记录
		return;
	}
	//进度文件被删除则终止传输;
	clearstatcache();
	if( !file_exists($cacheFile) || 
		!file_exists($file) ){
		exit;
	}

	$GLOBALS['curlCurrentFile']['time'] = mtime();
	$GLOBALS['curlCurrentFile']['setNum'] += 1;
	$args = func_get_args();
	if (is_resource($args[0])) {// php 5.5
		array_shift($args);
	}
	$downTotal = $args[0];
	$downSize = $args[1];
	$upTotal = $args[2];
	$upSize = $args[3];

	//默认上传
	$size = @filesize($file);
	$sizeSuccess = $upSize;
	if($fileInfo['download']){
		$size = $downTotal;
		$sizeSuccess = $downSize;
	}
	$json = array(
		'name'			=> substr(rawurlencode(get_path_this($file)),-10),
		'taskUuid'		=> $fileInfo['uuid'],
		'type'		 	=> $fileInfo['download']?'fileDownload':'fileUpload',
		'timeStart' 	=> time(),

		'sizeTotal'		=> $size,
		'sizeSuccess'	=> $sizeSuccess,
		'progress'	 	=> 0,
		'timeUse'	 	=> 0,
		'timeNeed'		=> 0,
		'speed'			=> 0,
		'logList'		=> array()
	);
	//write_log(array($args,$size,$sizeSuccess),'ttt');
	if(time() - filemtime($cacheFile) <= 10){//10s内才处理;同一个文件
		$data = @json_decode(file_get_contents($cacheFile),true);
		$json = $data?$data:$json;
	}else{
		del_file($cacheFile);
		touch($cacheFile);
	}

	//更新数据
	$logList = &$json['logList'];
	if(count($logList) >=10 ){
		$logList = array_slice($logList,-10);
	}

	$current = array('time'=>time(),'sizeSuccess'=>$sizeSuccess);
	if(count($logList) == 0){
		$logList[] = $current;
	}else{
		$last = $logList[count($logList)-1];
		if(time() == $last['time']){
			$logList[count($logList)-1] = $current;
		}else{
			$logList[] = $current;
		}
	}

	//计算速度
	$first = $logList[0];
	$last  = $logList[count($logList)-1];
	$time  = $last['time'] - $first['time'];
	$speed = $time?($last['sizeSuccess'] - $first['sizeSuccess'])/$time : 0;
	if($speed <0 || $speed>500*1024*1024){
		$speed = 0;
	}
	$timeNeed = $speed ? ($size - $sizeSuccess)/$speed:0;
	$progress = 0;
	if($size != 0 ){
		$progress  = ($sizeSuccess>=$size)?1:$sizeSuccess/$size;
	}
	$json['sizeTotal']  	= $size;
	$json['sizeSuccess']	= $sizeSuccess;
	$json['progress'] 		= $progress;
	$json['timeUse']  		= time() - $json['timeStart'];
	$json['timeNeed'] 		= intval($timeNeed);
	$json['speed'] = intval($speed);
	file_put_contents($cacheFile,json_encode($json));
}
function curl_progress_get($file,$uuid=''){
	$cacheFile = TEMP_PATH.'/curlProgress/'.md5($file.$uuid).'.log';
	if(!file_exists($cacheFile) || $file == ''){
		return -1;
	}
	$data = @json_decode(file_get_contents($cacheFile),true);
	if(is_array($data)){
		unset($data['logList']);
		return $data;
	}
	return -3;
}

// https://segmentfault.com/a/1190000000725185
// http://blog.csdn.net/havedream_one/article/details/52585331 
// php7.1 curl上传中文路径文件失败问题？【暂时通过重命名方式解决】
function url_request($url,$method='GET',$data=false,$headers=false,$options=false,$json=false,$timeout=3600){
	if(!$url){
		return array(
			'data'		=> 'url error! url='.$url,
			'code'		=> 0
		);
	}
	ignore_timeout();
	$ch = curl_init();
	$upload = false;
	if(is_array($data)){//上传检测并兼容
		foreach($data as $key => $value){
			if(!is_string($value) || substr($value,0,1) !== "@"){
				continue;
			}
			$upload = true;
			$path = ltrim($value,'@');
			$filename = iconv_app(get_path_this($path));
			$mime = get_file_mime(get_path_ext($filename));
			if(isset($data['curlUploadName'])){//自定义上传文件名;临时参数
				$filename = $data['curlUploadName'];
				unset($data['curlUploadName']);
			}
			if (class_exists('\CURLFile')){
				$data[$key] = new CURLFile(realpath($path),$mime,$filename);
			}else{
				$data[$key] = "@".realpath($path).";type=".$mime.";filename=".$filename;
			}
			//有update且method为PUT
			if($method == 'PUT'){
				curl_setopt($ch, CURLOPT_PUT,1);
				curl_setopt($ch, CURLOPT_INFILE,@fopen($path,'r'));
				curl_setopt($ch, CURLOPT_INFILESIZE,@filesize($path));				
			}

			//上传进度记录并处理
			curl_progress_bind($path);
			curl_setopt($ch, CURLOPT_NOPROGRESS, false);
			curl_setopt($ch, CURLOPT_PROGRESSFUNCTION,'curl_progress_set');
		}
	}
	if($upload){
		if (class_exists('\CURLFile')){
			curl_setopt($ch, CURLOPT_SAFE_UPLOAD, true);
		} else {
			if (defined('CURLOPT_SAFE_UPLOAD')) {
				curl_setopt($ch, CURLOPT_SAFE_UPLOAD, false);
			}
		}
	}

	// post数组或拼接的参数；不同方式服务器兼容性有所差异
	// http://blog.csdn.net/havedream_one/article/details/52585331 
	// post默认用array发送;content-type为x-www-form-urlencoded时用key=1&key=2的形式
	if (is_array($data) && is_array($headers) && $method != 'DOWNLOAD'){
		foreach ($headers as $key) {
			if(strstr($key,'x-www-form-urlencoded')){
				$data = http_build_query($data);
				break;
			}
		}
	}
	if($method == 'GET' && $data){
		if(is_array($data)){
			$data = http_build_query($data);
		}
		if(strstr($url,'?')){
			$url = $url.'&'.$data;
		}else{
			$url = $url.'?'.$data;
		}
	}
	curl_setopt($ch, CURLOPT_URL,$url);
	curl_setopt($ch, CURLOPT_HEADER,1);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
	curl_setopt($ch, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
	curl_setopt($ch, CURLINFO_HEADER_OUT, 1);
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
	curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
	// curl_setopt($ch, CURLOPT_SSLVERSION,1);//1|5|6; http://t.cn/RZy5nXF
	curl_setopt($ch, CURLOPT_TIMEOUT,$timeout);
	curl_setopt($ch, CURLOPT_REFERER,get_url_link($url));
	curl_setopt($ch, CURLOPT_USERAGENT,'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.94 Safari/537.36');
	if($headers){
		if(is_string($headers)){
			$headers = array($headers);
		}
		curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
	}

	switch ($method) {
		case 'GET':
			curl_setopt($ch,CURLOPT_HTTPGET,1);
			break;
		case 'DOWNLOAD':
			//远程下载到指定文件；进度条
			$downTemp = $data.'.'.rand_string(5);
			$fp = fopen ($downTemp,'w+');
			curl_progress_bind($downTemp,'',true);//下载进度
			curl_setopt($ch, CURLOPT_NOPROGRESS, false);
			curl_setopt($ch, CURLOPT_PROGRESSFUNCTION,'curl_progress_set');

			curl_setopt($ch, CURLOPT_HTTPGET,1);
			curl_setopt($ch, CURLOPT_HEADER,0);//不输出头
			curl_setopt($ch, CURLOPT_FILE, $fp);
			//CURLOPT_RETURNTRANSFER 必须放在CURLOPT_FILE前面;否则出问题
			break;
		case 'HEAD':
			curl_setopt($ch, CURLOPT_NOBODY, true);
			break;
		case 'POST':
			curl_setopt($ch, CURLOPT_POST, 1);
			curl_setopt($ch, CURLOPT_POSTFIELDS,$data);
			break;
		case 'OPTIONS':
		case 'PATCH':
		case 'DELETE':
		case 'PUT':
			curl_setopt($ch, CURLOPT_CUSTOMREQUEST,$method);
			curl_setopt($ch, CURLOPT_POSTFIELDS,$data);
			break;
		default:break;
	}

	if(!empty($options)){
		curl_setopt_array($ch, $options);
	}
	$response = curl_exec($ch);
	$header_size = curl_getinfo($ch,CURLINFO_HEADER_SIZE);
	$response_info = curl_getinfo($ch);
	$http_body   = substr($response, $header_size);
	$http_header = substr($response, 0, $header_size);
	$http_header = parse_headers($http_header);
	if(is_array($http_header)){
		// $http_header['kod_add_request_url'] = $url;
	}
	//error
	if($response_info['http_code'] == 0){
		$error_message = curl_error($ch);
		if (! empty($error_message)) {
			$error_message = "API call to $url failed;$error_message";
		} else {
			$error_message = "API call to $url failed;maybe network error!";
		}
		return array(
			'data'		=> $error_message,
			'code'		=> 0,
			'header'	=> $response_info,
		);
	}

	curl_close($ch);
	if(is_array($GLOBALS['curlCurrentFile'])){
		@unlink($GLOBALS['curlCurrentFile']['cacheFile']);
	}
	$success = $response_info['http_code'] >= 200 && $response_info['http_code'] <= 299;
	if( $json && $success){
		$data = @json_decode($http_body,true);
		if (json_last_error() == 0) { // string
			$http_body = $data;
		}
	}
	if($method == 'DOWNLOAD'){
		@fclose($fp);
		@clearstatcache();
		if($success){
			move_path($downTemp,$data);
		}
		@unlink($downTemp);
	}

	$return = array(
		'data'		=> $http_body,
		'status'	=> $success,
		'code'		=> $response_info['http_code'],
		'header'	=> $http_header,
	);
	return $return;
}
function curl_get_contents($url){
	$data = url_request($url);
	return $data['data'];
}

function get_headers_curl($url,$timeout=30,$depth=0,&$headers=array()){
	if(!function_exists('curl_init')){
		return false;
	}
	if ($depth >= 10) return false;
	$ch = curl_init(); 
	curl_setopt($ch, CURLOPT_URL,$url);
	curl_setopt($ch, CURLOPT_HEADER,true); 
	curl_setopt($ch, CURLOPT_NOBODY,true); 
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
	curl_setopt($ch, CURLOPT_TIMEOUT,$timeout);
	curl_setopt($ch, CURLOPT_REFERER,get_url_link($url));
	curl_setopt($ch, CURLOPT_USERAGENT,'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.94 Safari/537.36');

	$res = curl_exec($ch);
	$res = explode("\r\n", $res);

	$location = false;
	foreach ($res as $line) {
		list($key, $val) = explode(": ", $line, 2);
		$the_key = trim($key);
		if($the_key == 'Location' || $the_key == 'location'){
			$the_key = 'Location';
			$location = trim($val);
		}
		if( strlen($the_key) == 0 &&
			strlen(trim($val)) == 0  ){
			continue;
		}
		if( substr($the_key,0,4) == 'HTTP' &&
			strlen(trim($val)) == 0  ){
			$headers[] = $the_key;
			continue;
		}

		if(!isset($headers[$the_key])){
			$headers[$the_key] = trim($val);
		}else{
			if(is_string($headers[$the_key])){
				$temp = $headers[$the_key];
				$headers[$the_key] = array($temp);
			}
			$headers[$the_key][] = trim($val);
		}
	}
	if($location !== false){
		$depth++;
		get_headers_curl($location,$timeout,$depth,$headers);
	}
	return count($headers)==0?false:$headers;
} 

// 防止SSRF 攻击;curl,file_get_contents前检测url;
function request_url_safe($url){
	$url   = str_replace('\\','/',$url);
	$allow = array('http','https','ftp');
	$info  = parse_url($url);$hasAllow = false;
	foreach($allow as $scheme){
		$schemeNow = substr($url,0,strlen($scheme) + 3);
		if($schemeNow === $scheme."://"){$hasAllow = true;}
	}
	if(!$hasAllow) return false;
	if(strstr($url,'../')) return false;
	if(!$info['scheme'] || !$info['host'] || !in_array($info['scheme'],$allow)) return false;
	if(@file_exists($url) ) return false;
	return true;
}

// url header data
function url_header($url){
	$header = get_headers_curl($url);//curl优先
	if(is_array($header)){
		$header['ACTION_BY'] = 'get_headers_curl';
	}else{
		$header = @get_headers($url,true);
	}
	if (!$header) return false; 

	//加入小写header值;兼容各种不统一的情况
	$header['———'] = '————————————';//分隔
	foreach ($header as $key => $value) {
		$header[strtolower($key)] = $value;
	}
	$checkArr = array(
		'content-length'		=> 0, 
		'location'				=> $url,//301调整
		'content-disposition'	=> '',
	);
	//处理多次跳转的情况
	foreach ($checkArr as $key=>$val) {
		if(isset($header[$key])){
			$checkArr[$key] = $header[$key];
			if(is_array($header[$key])  && count($header[$key])>0){
				$checkArr[$key] = $header[$key][count($header[$key])-1];
			}
		}
	}
	$name 	= $checkArr['content-disposition'];
	$length = $checkArr['content-length'];
	$fileUrl= $checkArr['location'];
	if($name){
		preg_match('/filename\s*=\s*"*(.*)"*?/',$name,$match);
		if(count($match) == 2){
			$name = $match[1];
		}else{
			$name = '';
		}
	}
	if(!$name){
		$name = get_path_this($fileUrl);
		if (strstr($name,'=')) $name = substr($name,strrpos($name,'=')+1);
		if (!$name) $name = 'file.data';
	}
	if(!empty($header['x-outfilename'])){
		$name = $header['x-outfilename'];
	}
	$name = rawurldecode(trim($name,'"'));
	$name = str_replace(array('/','\\'),'-',$name);//safe;
	$supportRange = isset($header["accept-ranges"])?true:false;
	if(!request_url_safe($fileUrl)){
		$fileUrl = "";
	}
	$result = array(
		'url' 		=> $fileUrl,
		'length' 	=> $length,
		'name' 		=> $name,
		'supportRange' => $supportRange && ($length!=0),
		'all'		=> $header,
	);
	if(!function_exists('curl_init')){
		$result['supportRange'] = false;
	}
	//pr($url,$result);
	return $result;
}


// check url if can use
function check_url($url){
	$array = get_headers($url,true);
	$error = array('/404/','/403/','/500/');
	foreach ($error as $value) {
		if (preg_match($value, $array[0])) {
			return false;
		}
	}
	return true;
} 

// refer URL
function refer_url(){
	return isset($_SERVER["HTTP_REFERER"]) ? $_SERVER["HTTP_REFERER"] : '';
} 

function select_var($array){
	if (!is_array($array)) return -1;
	ksort($array);
	$chosen = -1;
	foreach ($array as $k => $v) {
		if (isset($v)) {
			$chosen = $v;
			break;
		} 
	} 
	return $chosen;
}

/**
 * 解析url获得url参数
 * @param $query
 * @return array array
 */
function parse_url_query($url){
	$arr = parse_url($url);
	$queryParts = explode('&',$arr['query']);
	$params = array();
	foreach ($queryParts as $param) {
		$item = explode('=', $param);
		$key = $item[0]; unset($item[0]);
        $params[$key] = implode('=', $item);
	}
	return $params;
}

function stripslashes_deep($value){ 
	$value = is_array($value) ? array_map('stripslashes_deep', $value) : (isset($value) ? stripslashes($value) : null); 
	return $value; 
}

function parse_url_route(){
	$param = str_replace($_SERVER['SCRIPT_NAME'],"",$_SERVER['SCRIPT_NAME']);
	if($param && substr($param,0,1) == '/'){
		$arr = explode('&',$param);
		$arr[0] = ltrim($arr[0],'/');
		foreach ($arr as  $cell) {
			$cell = explode('=',$cell);
			if(is_array($cell)){
				if(!isset($cell[1])){
					$cell[1] = '';
				}
				$_GET[$cell[0]] = $cell[1];
				$_REQUEST[$cell[0]] = $cell[1];
			}
		}
	}
}


/**
 * GET/POST数据统一入口
 * 将GET和POST的数据进行过滤，去掉非法字符以及hacker code，返回一个数组
 * 注意如果GET和POST有相同的Key，POST优先
 * 
 * @return array $_GET和$_POST数据过滤处理后的值
 */
function parse_incoming(){
	parse_url_route();
	global $_GET, $_POST,$_COOKIE;

	$_COOKIE = stripslashes_deep($_COOKIE);
	$_GET	 = stripslashes_deep($_GET);
	$_POST	 = stripslashes_deep($_POST);
	$return = array();
	$return = array_merge($_GET,$_POST);
	$remote = array_get_index($return,0);
	$remote = explode('/',trim($remote[0],'/'));
	$return['URLremote'] = $remote;
	return $return;
} 

function db_escape($str) {
	$str = addslashes($str);
	$str = str_replace(array('_', '%'),array('\\_', '\\%'), $str);
	return $str;
}

/**
 * 获取输入参数 支持过滤和默认值
 * 使用方法:
 * <code>
 * in('id',0); 获取id参数 自动判断get或者post
 * in('post.name','','htmlspecialchars'); 获取$_POST['name']
 * in('get.'); 获取$_GET
 * </code> 
 * @param string $name 变量的名称 支持指定类型
 * @param mixed $default 不存在的时候默认值
 * @param mixed $filter 参数过滤方法
 * @return mixed
 */
function in($name,$default='',$filter=null) {
	$default_filter = 'htmlspecialchars,db_escape';
	if(strpos($name,'.')) { // 指定参数来源
		list($method,$name) = explode('.',$name,2);
	}else{ // 默认为自动判断
		$method = 'request';
	}
	switch(strtolower($method)) {
		case 'get'     :   $input =& $_GET;break;
		case 'post'    :   $input =& $_POST;break;
		case 'request' :   $input =& $_REQUEST;   break;

		case 'put'     :   parse_str(file_get_contents('php://input'), $input);break;
		case 'session' :   $input =& $_SESSION;   break;
		case 'cookie'  :   $input =& $_COOKIE;    break;
		case 'server'  :   $input =& $_SERVER;    break;
		case 'globals' :   $input = $GLOBALS;    break;
		default:return NULL;
	}
	$filters = isset($filter)?$filter:$default_filter;
	if($filters) {
		$filters = explode(',',$filters);
	}
	if(empty($name)) { // 获取全部变量
		$data = $input; 
		foreach($filters as $filter){
			$data = array_map($filter,$data); // 参数过滤
		}
	}elseif(isset($input[$name])) { // 取值操作
		$data =	$input[$name];
		foreach($filters as $filter){
			if(function_exists($filter)) {
				$data = is_array($data)?array_map($filter,$data):$filter($data); // 参数过滤
			}else{
				$data = filter_var($data,is_int($filter)?$filter:filter_id($filter));
				if(false === $data) {
					return isset($default)?$default:NULL;
				}
			}
		}
	}else{ // 变量默认值
		$data = isset($default)?$default:NULL;
	}
	return $data;
}


function url2absolute($index_url, $preg_url){
	if (preg_match('/[a-zA-Z]*\:\/\//', $preg_url)) return $preg_url;
	preg_match('/([a-zA-Z]*\:\/\/.*)\//', $index_url, $match);
	$index_url_temp = $match[1];

	foreach(explode('/', $preg_url) as $key => $var) {
		if ($key == 0 && $var == '') {
			preg_match('/([a-zA-Z]*\:\/\/[^\/]*)\//', $index_url, $match);
			$index_url_temp = $match[1] . $preg_url;
			break;
		} 
		if ($var == '..') {
			preg_match('/([a-zA-Z]*\:\/\/.*)\//', $index_url_temp, $match);
			$index_url_temp = $match[1];
		} elseif ($var != '.') $index_url_temp .= '/' . $var;
	} 
	return $index_url_temp;
}

// 输出js
function exec_js($js){
	echo "<script language='JavaScript'>\n" . $js . "</script>\n";
} 
// 禁止缓存
function no_cache(){
	header("Pragma:no-cache\r\n");
	header("Cache-Control:no-cache\r\n");
	header("Expires:0\r\n");
} 
// 生成javascript转向
function go_url($url, $msg = ''){
	header("Content-type: text/html; charset=utf-8\r\n");
	echo "<script type='text/javascript'>\n";
	echo "window.location.href='$url';";
	echo "</script>\n";
	exit;
} 

function send_http_status($i_status, $s_message = ''){
	$a_status = array(
		// Informational 1xx
		100 => 'Continue',
		101 => 'Switching Protocols', 
		// Success 2xx
		200 => 'OK',
		201 => 'Created',
		202 => 'Accepted',
		203 => 'Non-Authoritative Information',
		204 => 'No Content',
		205 => 'Reset Content',
		206 => 'Partial Content', 
		// Redirection 3xx
		300 => 'Multiple Choices',
		301 => 'Moved Permanently',
		302 => 'Found', // 1.1
		303 => 'See Other',
		304 => 'Not Modified',
		305 => 'Use Proxy', // 306 is deprecated but reserved
		307 => 'Temporary Redirect', 
		// Client Error 4xx
		400 => 'Bad Request',
		401 => 'Unauthorized',
		402 => 'Payment Required',
		403 => 'Forbidden',
		404 => 'Not Found',
		405 => 'Method Not Allowed',
		406 => 'Not Acceptable',
		407 => 'Proxy Authentication Required',
		408 => 'Request Timeout',
		409 => 'Conflict',
		410 => 'Gone',
		411 => 'Length Required',
		412 => 'Precondition Failed',
		413 => 'Request Entity Too Large',
		414 => 'Request-URI Too Long',
		415 => 'Unsupported Media Type',
		416 => 'Requested Range Not Satisfiable',
		417 => 'Expectation Failed', 
		// Server Error 5xx
		500 => 'Internal Server Error',
		501 => 'Not Implemented',
		502 => 'Bad Gateway',
		503 => 'Service Unavailable',
		504 => 'Gateway Timeout',
		505 => 'HTTP Version Not Supported',
		509 => 'Bandwidth Limit Exceeded'
		);

	if (array_key_exists($i_status, $a_status)) {
		header('HTTP/1.1 ' . $i_status . ' ' . $a_status[$i_status]);
	} 
	if ($s_message) {
		echo $s_message;
		exit();
	} 
} 

//是否是windows
function client_is_windows(){
	static $is_windows;
	if(!is_array($is_windows)){
		$is_windows = array(0);
		$os = get_os();
		if(strstr($os,'Windows')){
			$is_windows = array(1);
		}	
	}	
	return $is_windows[0];
}

// 获取操作系统信息 TODO
function get_os (){
	$agent = $_SERVER['HTTP_USER_AGENT'];
	$preg_find = array(
		"Windows 95"	=>array('win','95'),
		"Windows ME"	=>array('win 9x','4.90'),
		"Windows 98"	=>array('win','98'),
		"Windows 2000"	=>array('win','nt 5.0',),
		"Windows XP"	=>array('win','nt 5.1'),
		"Windows Vista"	=>array('win','nt 6.0'),
		"Windows 7"		=>array('win','nt 6.1'),
		"Windows 32"	=>array('win','32'),
		"Windows NT"	=>array('win','nt'),
		"Mac OS"		=>array('Mac OS'),
		"Linux"			=>array('linux'),
		"Unix"			=>array('unix'),
		"SunOS"			=>array('sun','os'),
		"IBM OS/2"		=>array('ibm','os'),
		"Macintosh"		=>array('Mac','PC'),
		"PowerPC"		=>array('PowerPC'),
		"AIX"			=>array('AIX'),
		"HPUX"			=>array('HPUX'),
		"NetBSD"		=>array('NetBSD'),
		"BSD"			=>array('BSD'),
		"OSF1"			=>array('OSF1'),
		"IRIX"			=>array('IRIX'),
		"FreeBSD"		=>array('FreeBSD'),
	);

	$os='';
	foreach ($preg_find as $key => $value) {
		if(count($value)==1 && stripos($agent,$value[0])){
			$os=$key;break;
		}else if(count($value)==2 
				 && stripos($agent,$value[0])
				 && stripos($agent,$value[1])
				 ){
			$os=$key;break;
		}
	}
	if ($os=='') {$os = "Unknown"; }
	return $os;
}

// 浏览器是否直接打开
function mime_support($mime){
	$arr_start = array(
		"text/",
		"image/",
		"audio/",
		"video/",
		"message/",
	);
	$arr_mime = array(
		"application/hta",
		"application/javascript",
		"application/json",
		"application/x-latex",
		"application/pdf",
		"application/x-shockwave-flash",
		"application/x-tex",
		"application/x-texinfo"
	);
	if(in_array($mime,$arr_mime)){
		return true;
	}
	foreach ($arr_start as $val) {
		if(substr($mime,0,strlen($val)) == $val){
			return true;
		}
	}
	return false;
}

//根据扩展名获取mime
function get_file_mime($ext){
	$mimetypes = array(
		"323" => "text/h323",
		"acx" => "application/internet-property-stream",
		"ai" => "application/postscript",
		"aif" => "audio/x-aiff",
		"aifc" => "audio/x-aiff",
		"aiff" => "audio/x-aiff",
		"asf" => "video/x-ms-asf",
		"asr" => "video/x-ms-asf",
		"asx" => "video/x-ms-asf",
		"au" => "audio/basic",
		"avi" => "video/x-msvideo",
		"axs" => "application/olescript",
		"bas" => "text/plain",
		"bcpio" => "application/x-bcpio",
		"bin" => "application/octet-stream",
		"bmp" => "image/bmp",
		"c" => "text/plain",
		"cat" => "application/vnd.ms-pkiseccat",
		"cdf" => "application/x-cdf",
		"cer" => "application/x-x509-ca-cert",
		"class" => "application/octet-stream",
		"clp" => "application/x-msclip",
		"cmx" => "image/x-cmx",
		"cod" => "image/cis-cod",
		"cpio" => "application/x-cpio",
		"crd" => "application/x-mscardfile",
		"crl" => "application/pkix-crl",
		"crt" => "application/x-x509-ca-cert",
		"csh" => "application/x-csh",
		"css" => "text/css",
		"dcr" => "application/x-director",
		"der" => "application/x-x509-ca-cert",
		"dir" => "application/x-director",
		"dll" => "application/x-msdownload",
		"dms" => "application/octet-stream",
		"doc" => "application/msword",
		"docx" => "application/msword",
		"dot" => "application/msword",
		"dvi" => "application/x-dvi",
		"dxr" => "application/x-director",
		"eps" => "application/postscript",
		"etx" => "text/x-setext",
		"evy" => "application/envoy",
		"exe" => "application/octet-stream",
		"fif" => "application/fractals",
		"flr" => "x-world/x-vrml",
		"flv" => "video/x-flv",
		"f4v" => "application/octet-stream",
		"gif" => "image/gif",
		"gtar" => "application/x-gtar",
		"gz" => "application/x-gzip",
		"h" => "text/plain",
		"hdf" => "application/x-hdf",
		"hlp" => "application/winhlp",
		"hqx" => "application/mac-binhex40",
		"hta" => "application/hta",
		"htc" => "text/x-component",
		"htm" => "text/html",
		"html" => "text/html",
		"htt" => "text/webviewhtml",
		"ico" => "image/x-icon",
		"ief" => "image/ief",
		"iii" => "application/x-iphone",
		"ins" => "application/x-internet-signup",
		"isp" => "application/x-internet-signup",
		"jfif" => "image/pipeg",
		"jpe" => "image/jpeg",
		"jpeg" => "image/jpeg",
		"jpg" => "image/jpeg",
		"js" => "application/javascript",
		"json" => "application/json",
		"latex" => "application/x-latex",
		"lha" => "application/octet-stream",
		"lsf" => "video/x-la-asf",
		"lsx" => "video/x-la-asf",
		"lzh" => "application/octet-stream",
		"m13" => "application/x-msmediaview",
		"m14" => "application/x-msmediaview",
		"m3u" => "audio/x-mpegurl",
		'm4a' => "audio/mp4",
		'm4v' => "audio/mp4",
		"man" => "application/x-troff-man",
		"mdb" => "application/x-msaccess",
		"me" => "application/x-troff-me",
		"mht" => "message/rfc822",
		"mhtml" => "message/rfc822",
		"mid" => "audio/mid",
		"mny" => "application/x-msmoney",
		"mov" => "video/quicktime",
		"movie" => "video/x-sgi-movie",
		"mp2" => "video/mpeg",
		"mp3" => "audio/mpeg",
		"mp4" => "video/mp4",
		"mp4v" => "video/mp4",
		"mpa" => "video/mpeg",
		"mpe" => "video/mpeg",
		"mpeg" => "video/mpeg",
		"mpg" => "video/mpeg",
		"mpp" => "application/vnd.ms-project",
		"mpv2" => "video/mpeg",
		"ms" => "application/x-troff-ms",
		"mvb" => "application/x-msmediaview",
		"nws" => "message/rfc822",
		"oda" => "application/oda",
		"ogg" => "audio/ogg",
		"oga" => "audio/ogg",
		"ogv" => "audio/ogg",
		"p10" => "application/pkcs10",
		"p12" => "application/x-pkcs12",
		"p7b" => "application/x-pkcs7-certificates",
		"p7c" => "application/x-pkcs7-mime",
		"p7m" => "application/x-pkcs7-mime",
		"p7r" => "application/x-pkcs7-certreqresp",
		"p7s" => "application/x-pkcs7-signature",
		"pbm" => "image/x-portable-bitmap",
		"pdf" => "application/pdf",
		"pfx" => "application/x-pkcs12",
		"pgm" => "image/x-portable-graymap",
		"pko" => "application/ynd.ms-pkipko",
		"pma" => "application/x-perfmon",
		"pmc" => "application/x-perfmon",
		"pml" => "application/x-perfmon",
		"pmr" => "application/x-perfmon",
		"pmw" => "application/x-perfmon",
		"png" => "image/png",
		"pnm" => "image/x-portable-anymap",
		"pot," => "application/vnd.ms-powerpoint",
		"ppm" => "image/x-portable-pixmap",
		"pps" => "application/vnd.ms-powerpoint",
		"ppt" => "application/vnd.ms-powerpoint",
		"pptx" => "application/vnd.ms-powerpoint",
		"prf" => "application/pics-rules",
		"ps" => "application/postscript",
		"pub" => "application/x-mspublisher",
		"qt" => "video/quicktime",
		"ra" => "audio/x-pn-realaudio",
		"ram" => "audio/x-pn-realaudio",
		"ras" => "image/x-cmu-raster",
		"rgb" => "image/x-rgb",
		"rmi" => "audio/mid",
		"roff" => "application/x-troff",
		"rtf" => "application/rtf",
		"rtx" => "text/richtext",
		"scd" => "application/x-msschedule",
		"sct" => "text/scriptlet",
		"setpay" => "application/set-payment-initiation",
		"setreg" => "application/set-registration-initiation",
		"sh" => "application/x-sh",
		"shar" => "application/x-shar",
		"sit" => "application/x-stuffit",
		"snd" => "audio/basic",
		"spc" => "application/x-pkcs7-certificates",
		"spl" => "application/futuresplash",
		"src" => "application/x-wais-source",
		"sst" => "application/vnd.ms-pkicertstore",
		"stl" => "application/vnd.ms-pkistl",
		"stm" => "text/html",
		"svg" => "image/svg+xml",
		"sv4cpio" => "application/x-sv4cpio",
		"sv4crc" => "application/x-sv4crc",
		"swf" => "application/x-shockwave-flash",
		"t" => "application/x-troff",
		"tar" => "application/x-tar",
		"tcl" => "application/x-tcl",
		"tex" => "application/x-tex",
		"texi" => "application/x-texinfo",
		"texinfo" => "application/x-texinfo",
		"tgz" => "application/x-compressed",
		"tif" => "image/tiff",
		"tiff" => "image/tiff",
		"tr" => "application/x-troff",
		"trm" => "application/x-msterminal",
		"tsv" => "text/tab-separated-values",
		"txt" => "text/plain",
		"uls" => "text/iuls",
		"ustar" => "application/x-ustar",
		"vcf" => "text/x-vcard",
		"vrml" => "x-world/x-vrml",
		"wav" => "audio/wav",
		"wcm" => "application/vnd.ms-works",
		"wdb" => "application/vnd.ms-works",
		"webm" => "video/webm",
		"webmv" => "video/webm",
		"wks" => "application/vnd.ms-works",
		"wmf" => "application/x-msmetafile",
		"wps" => "application/vnd.ms-works",
		"wri" => "application/x-mswrite",
		"wrl" => "x-world/x-vrml",
		"wrz" => "x-world/x-vrml",
		"xaf" => "x-world/x-vrml",
		"xbm" => "image/x-xbitmap",
		"xla" => "application/vnd.ms-excel",
		"xlc" => "application/vnd.ms-excel",
		"xlm" => "application/vnd.ms-excel",
		"xls" => "application/vnd.ms-excel",
		"xlsx" => "application/vnd.ms-excel",
		"xlt" => "application/vnd.ms-excel",
		"xlw" => "application/vnd.ms-excel",
		"xof" => "x-world/x-vrml",
		"xpm" => "image/x-xpixmap",
		"xwd" => "image/x-xwindowdump",
		"z" => "application/x-compress",
		"zip" => "application/zip"
	);
	
	//代码 或文本浏览器输出
	$text = array('oexe','inc','inf','csv','log','asc','tsv');
	$code = array("abap","abc","as","ada","adb","htgroups","htpasswd","conf","htaccess","htgroups",
				"htpasswd","asciidoc","asm","ahk","bat","cmd","c9search_results","cpp","c","cc","cxx","h","hh","hpp",
				"cirru","cr","clj","cljs","CBL","COB","coffee","cf","cson","Cakefile","cfm","cs","css","curly","d",
				"di","dart","diff","patch","Dockerfile","dot","dummy","dummy","e","ejs","ex","exs","elm","erl",
				"hrl","frt","fs","ldr","ftl","gcode","feature",".gitignore","glsl","frag","vert","go","groovy",
				"haml","hbs","handlebars","tpl","mustache","hs","hx","html","htm","xhtml","erb","rhtml","ini",
				"cfg","prefs","io","jack","jade","java","js","jsm","json","jq","jsp","jsx","jl","tex","latex",
				"ltx","bib","lean","hlean","less","liquid","lisp","ls","logic","lql","lsl","lua","lp","lucene",
				"Makefile","GNUmakefile","makefile","OCamlMakefile","make","md","markdown","mask","matlab",
				"mel","mc","mush","mysql","nc","nix","m","mm","ml","mli","pas","p","pl","pm","pgsql","php","phtml",
				"ps1","praat","praatscript","psc","proc","plg","prolog","properties","proto","py","r","Rd",
				"Rhtml","rb","ru","gemspec","rake","Guardfile","Rakefile","Gemfile","rs","sass","scad","scala",
				"scm","rkt","scss","sh","bash",".bashrc","sjs","smarty","tpl","snippets","soy","space","sql",
				"styl","stylus","svg","tcl","tex","txt","textile","toml","twig","ts","typescript","str","vala",
				"vbs","vb","vm","v","vh","sv","svh","vhd","vhdl","xml","rdf","rss","log",
				"wsdl","xslt","atom","mathml","mml","xul","xbl","xaml","xq","yaml","yml","htm",
				"xib","storyboard","plist","csproj");
	if (array_key_exists($ext,$mimetypes)){
		return $mimetypes[$ext];
	}else{
		if(in_array($ext,$text) || in_array($ext,$code)){
			return "text/plain";
		}
		return 'application/octet-stream';
	}
}
