用php实现文件下载支持断点
用php实现文件下载， 同时支持下断点形式
ob_start(); $size = filesize($file_dir . $file_name); // 输入文件标签 Header("Content-type: application/octet-stream"); Header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); Header("Content-length: " . $size); $encoded_filename = urlencode($down_name); $encoded_filename = str_replace("+", "%20", $encoded_filename); $ua = $_SERVER["HTTP_USER_AGENT"]; // 处理下载的时候的文件名 if (preg_match("/MSIE/", $ua)) { header('Content-Disposition: attachment; filename="' . $encoded_filename . '"'); } else if (preg_match("/Firefox/", $ua)) { header('Content-Disposition: attachment; filename*="utf8\'\'' . $down_name . '"'); } else { header('Content-Disposition: attachment; filename="' . $down_name . '"'); } $fp = fopen($file_dir . $file_name, "r"); // 打开文件 if (isset($_SERVER['HTTP_RANGE']) && ($_SERVER['HTTP_RANGE'] != "") && preg_match("/^bytes=([0-9]+)-/i", $_SERVER['HTTP_RANGE'], $match) && ($match[1] 0 ? ($size - $range) : 0; header("Content-Length:" . $rangesize); header("Content-Range: bytes " . $range . '-' . ($size - 1) . "/" . $size); // header("Connection: close" . "\n\n" ); //header("Connection: close"." "); } else { header("Content-Length: " . (string) ($size)); header("Accept-Ranges: bytes"); $range = 0; header("Content-Range: bytes " . $range . '-' . ($size - 1) . "/" . $size); } fpassthru($fp); ob_end_flush(); fclose($fp); exit;
