php下载类

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最新推荐文章于 2021-03-09 22:07:08 发布

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

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

/**
+-----------------------------------------------------------
* 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 fsockopen_download($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 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 $num
*/
static function send_http_status($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;
}
}

}

?>