<?php

// +----------------------------------------------------------------------
// | ThinkPHP
// +----------------------------------------------------------------------
// | 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 工具类
 * 提供一系列的Http方法.
 +------------------------------------------------------------------------------
 * @category   ORG
 *
 * @author    liu21st <liu21st@gmail.com>
 *
 * @version   $Id$
 */
class Http extends Think
{
    //类定义开始

    /**
     * 采集远程文件.
     +----------------------------------------------------------
     +----------------------------------------------------------
     * @param string $remote 远程文件名
     * @param string $local  本地保存文件名
     +----------------------------------------------------------
     * @return mixed
     */
    public static function curl_download($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);
    }

    /**
     * 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
     +----------------------------------------------------------
     * @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 int    $expire   下载内容浏览器缓存时间
     +----------------------------------------------------------
     * @throws ThinkExecption
     */
    public static function download($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(L('PUBLIC_ATTACH_ISNULL'));
            //throw_exception($filename.L('PUBLIC_ATTACH_ISNULL'));
        }
        if (empty($showname)) {
            $showname = $filename;
        }
        //造成部分中文文件的乱码问题
        //$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() + $expire).'GMT');
        header('Last-Modified: '.gmdate('D, d M Y H:i:s', time()).'GMT');
        header('Content-Length: '.$length);
        header('Content-type: '.$type);
        header('Content-Disposition: attachment; filename= '.$showname.' ');
        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
     */
    public static function get_header_info($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 $num
     */
    public static function send_http_status($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 (array_key_exists($code, $_status)) {
            header('HTTP/1.1 '.$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;
       }
    }
}
