本帖最后由 bxline 于 2012-12-17 06:31:43 编辑
我用的是下面的代码,我试验了两回一次下载到145M不走了,一次下载到129M就不走了
,这是怎么回事?小文件下载正常,就是大于100M的文件不正常
下面是代码:我是03+FASTCGI,不是apache,所以代码中有的行给注释掉了
if(file_exists($filename)){
$mtime = ($mtime = filemtime($filename)) ? $mtime : gmtime();
$size = intval(sprintf("%u", filesize($filename)));
#if (intval($size + 1) > return_bytes(ini_get('memory_limit')) && intval($size * 1.5)
# ini_set('memory_limit', intval($size * 1.5));
#}
//@apache_setenv('no-gzip', 1);
//@ini_set('zlib.output_compression', 0);
header('Content-Description: File Transfer');
header('Content-Type: application/force-download');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($filename));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header("Content-Length: " . $size);
set_time_limit(300);
$chunksize = 1 * (1024 * 1024);
// ob_clean();
// flush();
if ($size > $chunksize) {
$handle = fopen($filename, 'rb');
$buffer = '';
while (!feof($handle)) {
$buffer = fread($handle, $chunksize);
echo $buffer;
ob_flush();
flush();
}
fclose($handle);
} else {
ob_flush();
flush();
readfile($filename);
}
exit;
}
------解决方案--------------------echo 100 * 1024 / 300;
得 341 K/s
即需要平均带宽为 3M 以上
你的下载代码不具有断点续传能力,一旦出现传输错误,即可终止
------解决方案--------------------我该写了一下,你看看
<br>
Function down($file){<br>
IF(!$file Or !File_Exists($file) Or !Is_Readable($file)) {Return False;}<br>
<br>
IF($f = atr($file)) {<br>
Header("Content-Length:{$f['size']}");<br>
Header('Content-Description:File Transfer');<br>
Header('Content-Transfer-Encoding:binary');<br>
Header('Expires:0');<br>
Header('Cache-Control:must-revalidate');<br>
Header('Pragma:public');<br>
<br>
IF(Function_exists("mime_content_type")) {<br>
Header("Content-Type: ".mime_content_type($f['name']));<br>
}Else{<br>
Header("Content-Type: application/octet-stream"); <div class="clear">
</div>
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