<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: Http.class.php 2504 2011-12-28 07:35:29Z liu21st $

/**
 +------------------------------------------------------------------------------
 * Http 工具类
 * 提供一系列的Http方法
 +------------------------------------------------------------------------------
 * @category   ORG
 * @package  ORG
 * @subpackage  Net
 * @author    liu21st <liu21st@gmail.com>
 * @version   $Id: Http.class.php 2504 2011-12-28 07:35:29Z liu21st $
 +------------------------------------------------------------------------------
 */
class Http {

	/**
	 +----------------------------------------------------------
	 * 采集远程文件
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $remote 远程文件名
	 * @param string $local 本地保存文件名
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	static public function curlDownload($remote,$local) {
		$cp = curl_init($remote);
		$fp = fopen($local,"w");
		curl_setopt($cp, CURLOPT_FILE, $fp);
		curl_setopt($cp, CURLOPT_HEADER, 0);
		curl_exec($cp);
		curl_close($cp);
		fclose($fp);
	}

	/**
	 +-----------------------------------------------------------
	 * 使用 fsockopen 通过 HTTP 协议直接访问(采集)远程文件
	 * 如果主机或服务器没有开启 CURL 扩展可考虑使用
	 * fsockopen 比 CURL 稍慢,但性能稳定
	 +-----------------------------------------------------------
	 * @static
	 * @access public
	 +-----------------------------------------------------------
	 * @param string $url 远程URL
	 * @param array $conf 其他配置信息
	 *        int   limit 分段读取字符个数
	 *        string post  post的内容,字符串或数组,key=value&形式
	 *        string cookie 携带cookie访问,该参数是cookie内容
	 *        string ip    如果该参数传入,$url将不被使用,ip访问优先
	 *        int    timeout 采集超时时间
	 *        bool   block 是否阻塞访问,默认为true
	 +-----------------------------------------------------------
	 * @return mixed
	 +-----------------------------------------------------------
	 */
	static public function fsockopenDownload($url, $conf = array()) {
		$return = '';
		if(!is_array($conf)) return $return;

		$matches = parse_url($url);
		!isset($matches['host']) && $matches['host'] = '';
		!isset($matches['path']) && $matches['path'] = '';
		!isset($matches['query']) && $matches['query'] = '';
		!isset($matches['port']) && $matches['port'] = '';
		$host = $matches['host'];
		$path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/';
		$port = !empty($matches['port']) ? $matches['port'] : 80;

		$conf_arr = array(
            'limit'=>0,
            'post'=>'',
            'cookie'=>'',
            'ip'=>'',
            'timeout'=>15,
            'block'=>TRUE,
		);

		foreach (array_merge($conf_arr, $conf) as $k=>$v) ${$k} = $v;

		if($post) {
			if(is_array($post))
			{
				$post = http_build_query($post);
			}
			$out = "POST $path HTTP/1.0\r\n";
			$out .= "Accept: */*\r\n";
			//$out .= "Referer: $boardurl\r\n";
			$out .= "Accept-Language: zh-cn\r\n";
			$out .= "Content-Type: application/x-www-form-urlencoded\r\n";
			$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
			$out .= "Host: $host\r\n";
			$out .= 'Content-Length: '.strlen($post)."\r\n";
			$out .= "Connection: Close\r\n";
			$out .= "Cache-Control: no-cache\r\n";
			$out .= "Cookie: $cookie\r\n\r\n";
			$out .= $post;
		} else {
			$out = "GET $path HTTP/1.0\r\n";
			$out .= "Accept: */*\r\n";
			//$out .= "Referer: $boardurl\r\n";
			$out .= "Accept-Language: zh-cn\r\n";
			$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
			$out .= "Host: $host\r\n";
			$out .= "Connection: Close\r\n";
			$out .= "Cookie: $cookie\r\n\r\n";
		}
		$fp = @fsockopen(($ip ? $ip : $host), $port, $errno, $errstr, $timeout);
		if(!$fp) {
			return '';
		} else {
			stream_set_blocking($fp, $block);
			stream_set_timeout($fp, $timeout);
			@fwrite($fp, $out);
			$status = stream_get_meta_data($fp);
			if(!$status['timed_out']) {
				while (!feof($fp)) {
					if(($header = @fgets($fp)) && ($header == "\r\n" ||  $header == "\n")) {
						break;
					}
				}

				$stop = false;
				while(!feof($fp) && !$stop) {
					$data = fread($fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit));
					$return .= $data;
					if($limit) {
						$limit -= strlen($data);
						$stop = $limit <= 0;
					}
				}
			}
			@fclose($fp);
			return $return;
		}
	}

	/**
	 +----------------------------------------------------------
	 * 下载文件
	 * 可以指定下载显示的文件名，并自动发送相应的Header信息
	 * 如果指定了content参数，则下载该参数的内容
	 +----------------------------------------------------------
	 * @static
	 * @access public
	 +----------------------------------------------------------
	 * @param string $filename 下载文件名
	 * @param string $showname 下载显示的文件名
	 * @param string $content  下载的内容
	 * @param integer $expire  下载内容浏览器缓存时间
	 +----------------------------------------------------------
	 * @return void
	 +----------------------------------------------------------
	 * @throws ThinkExecption
	 +----------------------------------------------------------
	 */
	static public function download ($filename, $showname='',$content='',$expire=180) {
		if(is_file($filename)) {
			$length = filesize($filename);
		}elseif(is_file(UPLOAD_PATH.$filename)) {
			$filename = UPLOAD_PATH.$filename;
			$length = filesize($filename);
		}elseif($content != '') {
			$length = strlen($content);
		}else {
			throw_exception($filename.L('下载文件不存在！'));
		}
		if(empty($showname)) {
			$showname = $filename;
		}
		$showname = basename($showname);
		if(!empty($filename)) {
			$type = mime_content_type($filename);
		}else{
			$type	 =	 "application/octet-stream";
		}
		//发送Http Header信息 开始下载
		header("Pragma: public");
		header("Cache-control: max-age=".$expire);
		//header('Cache-Control: no-store, no-cache, must-revalidate');
		header("Expires: " . gmdate("D, d M Y H:i:s",time()+$expire) . "GMT");
		header("Last-Modified: " . gmdate("D, d M Y H:i:s",time()) . "GMT");
		header("Content-Disposition: attachment; filename=".$showname);
		header("Content-Length: ".$length);
		header("Content-type: ".$type);
		header('Content-Encoding: none');
		header("Content-Transfer-Encoding: binary" );
		if($content == '' ) {
			readfile($filename);
		}else {
			echo($content);
		}
		exit();
	}

	/**
	 +----------------------------------------------------------
	 * 显示HTTP Header 信息
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	static function getHeaderInfo($header='',$echo=true) {
		ob_start();
		$headers   = getallheaders();
		if(!empty($header)) {
			$info = $headers[$header];
			echo($header.':'.$info."\n"); ;
		}else {
			foreach($headers as $key=>$val) {
				echo("$key:$val\n");
			}
		}
		$output = ob_get_clean();
		if ($echo) {
			echo (nl2br($output));
		}else {
			return $output;
		}

	}

	/**
	 * HTTP Protocol defined status codes
	 * @param int $num
	 */
	static function sendHttpStatus($code) {
		static $_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(isset($_status[$code])) {
			header('HTTP/1.1 '.$code.' '.$_status[$code]);
		}
	}
}//类定义结束
if( !function_exists ('mime_content_type')) {
	/**
	 +----------------------------------------------------------
	 * 获取文件的mime_content类型
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	function mime_content_type($filename) {
		static $contentType = array(
			'ai'	=> 'application/postscript',
				'aif'	=> 'audio/x-aiff',
				'aifc'	=> 'audio/x-aiff',
				'aiff'	=> 'audio/x-aiff',
				'asc'	=> 'application/pgp', //changed by skwashd - was text/plain
				'asf'	=> 'video/x-ms-asf',
				'asx'	=> 'video/x-ms-asf',
				'au'	=> 'audio/basic',
				'avi'	=> 'video/x-msvideo',
				'bcpio'	=> 'application/x-bcpio',
				'bin'	=> 'application/octet-stream',
				'bmp'	=> 'image/bmp',
				'c'	=> 'text/plain', // or 'text/x-csrc', //added by skwashd
				'cc'	=> 'text/plain', // or 'text/x-c++src', //added by skwashd
				'cs'	=> 'text/plain', //added by skwashd - for C# src
				'cpp'	=> 'text/x-c++src', //added by skwashd
				'cxx'	=> 'text/x-c++src', //added by skwashd
				'cdf'	=> 'application/x-netcdf',
				'class'	=> 'application/octet-stream',//secure but application/java-class is correct
				'com'	=> 'application/octet-stream',//added by skwashd
				'cpio'	=> 'application/x-cpio',
				'cpt'	=> 'application/mac-compactpro',
				'csh'	=> 'application/x-csh',
				'css'	=> 'text/css',
				'csv'	=> 'text/comma-separated-values',//added by skwashd
				'dcr'	=> 'application/x-director',
				'diff'	=> 'text/diff',
				'dir'	=> 'application/x-director',
				'dll'	=> 'application/octet-stream',
				'dms'	=> 'application/octet-stream',
				'doc'	=> 'application/msword',
				'dot'	=> 'application/msword',//added by skwashd
				'dvi'	=> 'application/x-dvi',
				'dxr'	=> 'application/x-director',
				'eps'	=> 'application/postscript',
				'etx'	=> 'text/x-setext',
				'exe'	=> 'application/octet-stream',
				'ez'	=> 'application/andrew-inset',
				'gif'	=> 'image/gif',
				'gtar'	=> 'application/x-gtar',
				'gz'	=> 'application/x-gzip',
				'h'	=> 'text/plain', // or 'text/x-chdr',//added by skwashd
				'h++'	=> 'text/plain', // or 'text/x-c++hdr', //added by skwashd
				'hh'	=> 'text/plain', // or 'text/x-c++hdr', //added by skwashd
				'hpp'	=> 'text/plain', // or 'text/x-c++hdr', //added by skwashd
				'hxx'	=> 'text/plain', // or 'text/x-c++hdr', //added by skwashd
				'hdf'	=> 'application/x-hdf',
				'hqx'	=> 'application/mac-binhex40',
				'htm'	=> 'text/html',
				'html'	=> 'text/html',
				'ice'	=> 'x-conference/x-cooltalk',
				'ics'	=> 'text/calendar',
				'ief'	=> 'image/ief',
				'ifb'	=> 'text/calendar',
				'iges'	=> 'model/iges',
				'igs'	=> 'model/iges',
				'jar'	=> 'application/x-jar', //added by skwashd - alternative mime type
				'java'	=> 'text/x-java-source', //added by skwashd
				'jpe'	=> 'image/jpeg',
				'jpeg'	=> 'image/jpeg',
				'jpg'	=> 'image/jpeg',
				'js'	=> 'application/x-javascript',
				'kar'	=> 'audio/midi',
				'latex'	=> 'application/x-latex',
				'lha'	=> 'application/octet-stream',
				'log'	=> 'text/plain',
				'lzh'	=> 'application/octet-stream',
				'm3u'	=> 'audio/x-mpegurl',
				'man'	=> 'application/x-troff-man',
				'me'	=> 'application/x-troff-me',
				'mesh'	=> 'model/mesh',
				'mid'	=> 'audio/midi',
				'midi'	=> 'audio/midi',
				'mif'	=> 'application/vnd.mif',
				'mov'	=> 'video/quicktime',
				'movie'	=> 'video/x-sgi-movie',
				'mp2'	=> 'audio/mpeg',
				'mp3'	=> 'audio/mpeg',
				'mpe'	=> 'video/mpeg',
				'mpeg'	=> 'video/mpeg',
				'mpg'	=> 'video/mpeg',
				'mpga'	=> 'audio/mpeg',
				'ms'	=> 'application/x-troff-ms',
				'msh'	=> 'model/mesh',
				'mxu'	=> 'video/vnd.mpegurl',
				'nc'	=> 'application/x-netcdf',
				'oda'	=> 'application/oda',
				'patch'	=> 'text/diff',
				'pbm'	=> 'image/x-portable-bitmap',
				'pdb'	=> 'chemical/x-pdb',
				'pdf'	=> 'application/pdf',
				'pgm'	=> 'image/x-portable-graymap',
				'pgn'	=> 'application/x-chess-pgn',
				'pgp'	=> 'application/pgp',//added by skwashd
				'php'	=> 'application/x-httpd-php',
				'php3'	=> 'application/x-httpd-php3',
				'pl'	=> 'application/x-perl',
				'pm'	=> 'application/x-perl',
				'png'	=> 'image/png',
				'pnm'	=> 'image/x-portable-anymap',
				'po'	=> 'text/plain',
				'ppm'	=> 'image/x-portable-pixmap',
				'ppt'	=> 'application/vnd.ms-powerpoint',
				'ps'	=> 'application/postscript',
				'qt'	=> 'video/quicktime',
				'ra'	=> 'audio/x-realaudio',
				'rar'=>'application/octet-stream',
				'ram'	=> 'audio/x-pn-realaudio',
				'ras'	=> 'image/x-cmu-raster',
				'rgb'	=> 'image/x-rgb',
				'rm'	=> 'audio/x-pn-realaudio',
				'roff'	=> 'application/x-troff',
				'rpm'	=> 'audio/x-pn-realaudio-plugin',
				'rtf'	=> 'text/rtf',
				'rtx'	=> 'text/richtext',
				'sgm'	=> 'text/sgml',
				'sgml'	=> 'text/sgml',
				'sh'	=> 'application/x-sh',
				'shar'	=> 'application/x-shar',
				'shtml'	=> 'text/html',
				'silo'	=> 'model/mesh',
				'sit'	=> 'application/x-stuffit',
				'skd'	=> 'application/x-koan',
				'skm'	=> 'application/x-koan',
				'skp'	=> 'application/x-koan',
				'skt'	=> 'application/x-koan',
				'smi'	=> 'application/smil',
				'smil'	=> 'application/smil',
				'snd'	=> 'audio/basic',
				'so'	=> 'application/octet-stream',
				'spl'	=> 'application/x-futuresplash',
				'src'	=> 'application/x-wais-source',
				'stc'	=> 'application/vnd.sun.xml.calc.template',
				'std'	=> 'application/vnd.sun.xml.draw.template',
				'sti'	=> 'application/vnd.sun.xml.impress.template',
				'stw'	=> 'application/vnd.sun.xml.writer.template',
				'sv4cpio'	=> 'application/x-sv4cpio',
				'sv4crc'	=> 'application/x-sv4crc',
				'swf'	=> 'application/x-shockwave-flash',
				'sxc'	=> 'application/vnd.sun.xml.calc',
				'sxd'	=> 'application/vnd.sun.xml.draw',
				'sxg'	=> 'application/vnd.sun.xml.writer.global',
				'sxi'	=> 'application/vnd.sun.xml.impress',
				'sxm'	=> 'application/vnd.sun.xml.math',
				'sxw'	=> 'application/vnd.sun.xml.writer',
				'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-gtar',
				'tif'	=> 'image/tiff',
				'tiff'	=> 'image/tiff',
				'tr'	=> 'application/x-troff',
				'tsv'	=> 'text/tab-separated-values',
				'txt'	=> 'text/plain',
				'ustar'	=> 'application/x-ustar',
				'vbs'	=> 'text/plain', //added by skwashd - for obvious reasons
				'vcd'	=> 'application/x-cdlink',
				'vcf'	=> 'text/x-vcard',
				'vcs'	=> 'text/calendar',
				'vfb'	=> 'text/calendar',
				'vrml'	=> 'model/vrml',
				'vsd'	=> 'application/vnd.visio',
				'wav'	=> 'audio/x-wav',
				'wax'	=> 'audio/x-ms-wax',
				'wbmp'	=> 'image/vnd.wap.wbmp',
				'wbxml'	=> 'application/vnd.wap.wbxml',
				'wm'	=> 'video/x-ms-wm',
				'wma'	=> 'audio/x-ms-wma',
				'wmd'	=> 'application/x-ms-wmd',
				'wml'	=> 'text/vnd.wap.wml',
				'wmlc'	=> 'application/vnd.wap.wmlc',
				'wmls'	=> 'text/vnd.wap.wmlscript',
				'wmlsc'	=> 'application/vnd.wap.wmlscriptc',
				'wmv'	=> 'video/x-ms-wmv',
				'wmx'	=> 'video/x-ms-wmx',
				'wmz'	=> 'application/x-ms-wmz',
				'wrl'	=> 'model/vrml',
				'wvx'	=> 'video/x-ms-wvx',
				'xbm'	=> 'image/x-xbitmap',
				'xht'	=> 'application/xhtml+xml',
				'xhtml'	=> 'application/xhtml+xml',
				'xls'	=> 'application/vnd.ms-excel',
				'xlt'	=> 'application/vnd.ms-excel',
				'xml'	=> 'application/xml',
				'xpm'	=> 'image/x-xpixmap',
				'xsl'	=> 'text/xml',
				'xwd'	=> 'image/x-xwindowdump',
				'xyz'	=> 'chemical/x-xyz',
				'z'	=> 'application/x-compress',
				'zip'	=> 'application/zip',
		);
		$type = strtolower(substr(strrchr($filename, '.'),1));
		if(isset($contentType[$type])) {
			$mime = $contentType[$type];
		}else {
			$mime = 'application/octet-stream';
		}
		return $mime;
	}
}

if(!function_exists('image_type_to_extension')){
	function image_type_to_extension($imagetype) {
		if(empty($imagetype)) return false;
		switch($imagetype) {
			case IMAGETYPE_GIF    : return '.gif';
			case IMAGETYPE_JPEG    : return '.jpg';
			case IMAGETYPE_PNG    : return '.png';
			case IMAGETYPE_SWF    : return '.swf';
			case IMAGETYPE_PSD    : return '.psd';
			case IMAGETYPE_BMP    : return '.bmp';
			case IMAGETYPE_TIFF_II : return '.tiff';
			case IMAGETYPE_TIFF_MM : return '.tiff';
			case IMAGETYPE_JPC    : return '.jpc';
			case IMAGETYPE_JP2    : return '.jp2';
			case IMAGETYPE_JPX    : return '.jpf';
			case IMAGETYPE_JB2    : return '.jb2';
			case IMAGETYPE_SWC    : return '.swc';
			case IMAGETYPE_IFF    : return '.aiff';
			case IMAGETYPE_WBMP    : return '.wbmp';
			case IMAGETYPE_XBM    : return '.xbm';
			default                : return false;
		}
	}

}