php Header函数实现下载短点续传程序
本文章给大家来总结几种实现下载短点续传程序功能,这些函数中主要是用到了php的header函数,有需要了解的朋友可进入参考。
例如:下载时输出 下载文件大小,文件名等等
前提是.htaccess文件的配置需要添加一句
SetEnv no-gzip dont-vary
就是针对文件不进行压缩处理
例1
代码如下 | 复制代码 |
function download($file_dir,$file_name) |
例2
代码如下 | 复制代码 |
$fname = './MMLDZG.mp3'; $fp = fopen($fname,'rb'); $fsize = filesize($fname); if (isset($_SERVER['HTTP_RANGE']) && ($_SERVER['HTTP_RANGE'] != "") && preg_match("/^bytes=([0-9]+)-$/i", $_SERVER['HTTP_RANGE'], $match) && ($match[1] $start = $match[1]; } else { $start = 0; } @header("Cache-control: public"); @header("Pragma: public"); if ($star--> 0) { fseek($fp, $start); Header("HTTP/1.1 206 Partial Content"); Header("Content-Length: " . ($fsize - $start)); Header("Content-Ranges: bytes" . $start . "-" . ($fsize - 1) . "/" . $fsize); } else { header("Content-Length: $fsize"); Header("Accept-Ranges: bytes"); } @header("Content-Type: application/octet-stream"); @header("Content-Disposition: attachment;filename=mmdld.mp3"); fpassthru($fp); |
fpassthru() 函数输出文件指针处的所有剩余数据。
该函数将给定的文件指针从当前的位置读取到 EOF,并把结果写到输出缓冲区
上面两个实例对中文支持不好,下面这个函数很好的解决了这个问题
代码如下 | 复制代码 |
/** * PHP-HTTP断点续传实现 * @param string $path: 文件所在路径 * @param string $file: 文件名 * @return void */ function download($path,$file) { $real = $path.'/'.$file; if(!file_exists($real)) { return false; } $size = filesize($real); $size2 = $size-1; $range = 0; if(isset($_SERVER['HTTP_RANGE'])) { header('HTTP /1.1 206 Partial Content'); $range = str_replace('=','-',$_SERVER['HTTP_RANGE']); $range = explode('-',$range); $range = trim($range[1]); header('Content-Length:'.$size); header('Content-Range: bytes '.$range.'-'.$size2.'/'.$size); } else { header('Content-Length:'.$size); header('Content-Range: bytes 0-'.$size2.'/'.$size); } header('Accenpt-Ranges: bytes'); header('application/octet-stream'); header("Cache-control: public"); header("Pragma: public"); //解决在IE中下载时中文乱码问题 $ua = $_SERVER['HTTP_USER_AGENT']; if(preg_match('/MSIE/',$ua)) { $ie_filename = str_replace('+','%20',urlencode($file)); header('Content-Dispositon:attachment; filename='.$ie_filename); } else { header('Content-Dispositon:attachment; filename='.$file); } $fp = fopen($real,'rb+'); fseek($fp,$range); while(!feof($fp)) { set_time_limit(0); print(fread($fp,1024)); flush(); ob_flush(); } fclose($fp); } /*End of PHP*/ |

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