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php远程下载文件

2015-10-30 18:07 846 查看
<?php
/*
本源码来源于网络 http://user.qzone.qq.com/292672703 */
header("content-Type: text/html; charset=utf-8");  //定义编码
set_time_limit (0);//不限时   24 * 60 * 60
//语言包数组
$lang_cn = array (
'0' => '文件地址',
'1' => '输入密码',
'2' => '下载耗时',
'3' => '微秒,文件大小',
'4' => '字节',
'5' => '下载成功',
'6' => '无效密码',
'7' => '请重新输入',
'8' => '远程文件下载',
'9' => '不能打开文件',
'10'=> '不能写入文件',
'11'=> '文件地址',
'12'=> '下载时间',
'13'=> '文件不可写入',
'14'=> '成功地将',
'15'=> '操作记录成功写入!',
'16'=> '系统已将此次操作写入日志记录!',
'17'=> '写入失败',
'18'=> '文件不存在,试图创建,',
'19'=> '创建失败！',
'20'=>'文件大小',
'21'=>'未知',
'22'=>'已经下载',
'23'=>'完成进度',
'24'=>'必须为绝对地址，且前面要加http://'
);
//China,中文
$lang_en = array (
'0' => 'File',
'1' => 'Pass',
'2' => 'DownTime',
'3' => 'Ms, file size',
'4' => 'Byte',
'5' => 'Download complete',
'6' => 'Invalid password',
'7' => 'Please try again',
'8' => 'Happy flying blog - Remote File Download',
'9' => 'Can not open file',
'10'=> 'Can not write file',
'11'=> 'Query File',
'12'=> 'Query Time',
'13'=> 'file not writeable',
'14'=> 'I have success save',
'15'=> 'Write successful!',
'16'=> 'The operating system has written to the log records!',
'17'=> 'Success or failure',
'18'=> 'File does not exist, attempting to create,',
'19'=> 'Create Failed',
'20'=>'File Size',
'21'=>'Unknown length',
'22'=>'Have downloaded',
'23'=>'Download progress',
'24'=>'Must be an absolute address'
);
//English,英文
$Language = $lang_cn;         //切换语言
$Archives = 'log.txt';         //Log文件
$Folder   = 'qq292672703/';     //下载目录
$password = '292672703';         //管理密码
?>
<!--简单控制地址长度-->
<SCRIPT language=javascript>
function CheckPost()
{
if (myform.url.value.length<10)
{
alert("文件地址不能小于10个字符，请认真填写！");
myform.url.focus();
return false;
}
}
</SCRIPT>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="zh-cn">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title><?php echo $Language[8]; ?></title>
</head>

<body>
<form method="post"  name="myform" onsubmit="return CheckPost();">
<?php echo $Language[0]; ?>: <input name="url" type="text" value="http://" size="50%"/> <font color="red"><?php echo $Language[24]; ?></font><br>
<?php echo $Language[1]; ?>: <input name="password" type="password"size="30%" /><br>
<input name="submit" type="submit" value="确认下载" />
</form><br />

<table border="1" width="100%">
<tr>
<td width="20%"><?php echo $Language[20]; ?></td>
<td width="80%"><font color="red"><div id="filesize"><?php echo $Language[21]; ?></font> <?php echo $Language[4]; ?></div></td>
</tr>
<tr>
<td> <?php echo $Language[22]; ?></td><td><font color="red"><div id="downloaded">0</font> <?php echo $Language[4]; ?></div></td>
</tr>
<tr>
<td> <?php echo $Language[23]; ?></td><td><font color="red"><div id="progressbar" style="float:left;width:1px; text-align:center; color:#FFFFFF; background-color:#0066CC"></div><div id="progressText" style=" float:left">0%</div></font></td>
</tr>
</table>
<!--文件计算、进度显示-->
<script type="text/javascript">
//文件长度
var filesize=0;
function $(obj)
{
return document.getElementById(obj);
}
//设置文件长度
function setFileSize(fsize)
{
filesize=fsize;
$("filesize").innerHTML=fsize;
}
//设置已经下载的,并计算百分比
function setDownloaded(fsize)
{
$("downloaded").innerHTML=fsize;
if(filesize>0)
{
var percent=Math.round(fsize*100/filesize);
$("progressbar").style.width=(percent+"%");
if(percent>0)
{
$("progressbar").innerHTML=percent+"%";
$("progressText").innerHTML="";
}
else
{
$("progressText").innerHTML=percent+"%";
}

}
}

</script>

<?php
//密码验证
if ($_POST['password'] == $password)
{
class runtime
{
var $StartTime = 0;
var $StopTime = 0;
function get_microtime()
{
list($usec, $sec) = explode(' ', microtime());
return ((float)$usec + (float)$sec);
}
function start()
{
$this->StartTime = $this->get_microtime();
}
function stop()
{
$this->StopTime = $this->get_microtime();
}
function spent()
{
return round(($this->StopTime - $this->StartTime) * 1000, 1);
}
}

//消耗时间
$runtime= new runtime;
$runtime->start();

// 下载
if (!isset($_POST['submit'])) die();
$destination_folder = $Folder;
if(!is_dir($destination_folder))
mkdir($destination_folder,0777);
$url = $_POST['url'];
$file = fopen ($url, "rb");
if ($file)
{
// 获取文件大小
$filesize=-1;
$headers = get_headers($url, 1);
if ((!array_key_exists("Content-Length", $headers)))
{
$filesize=0;
}
$filesize= $headers["Content-Length"];
$newfname = $destination_folder . basename($url);

//不是所有的文件都会先返回大小的，
//有些动态页面不先返回总大小，这样就无法计算进度了

if($filesize != -1)
{
echo "<script>setFileSize($filesize);</script>";    //在前台显示文件大小
}
$newf = fopen ($newfname, "wb");
$downlen=0;
if ($newf)
while(!feof($file)) {
$data=fread($file, 1024 * 8 );    //默认获取8K
$downlen+=strlen($data);    // 累计已经下载的字节数
fwrite($newf, $data, 1024 * 8 );
echo "<script>setDownloaded($downlen);</script>";    //在前台显示已经下载文件大小
ob_flush();
flush();
}
}
if ($file)
{
fclose($file);
}

if ($newf)
{
fclose($newf);
}

$runtime->stop();//停止计算

//乱七八糟的东西 -0-；
$downtime =  '<p>'.$Language[2].':<font color="blue"> '.$runtime->spent().' </font>'.$Language[3].'<font color="blue"> '.$headers["Content-Length"].' </font>'.$Language[4].'.</p><br>';
$downok  =   '<p><font color="red">'.$Language[5].'！'.date("Y-m-d H:i:s").'</font></p><br>';
}
elseif(isset($_POST['password']))
{
$passerror = '<p><font color="red">'.$Language[6].'！'.$Language[7].'!</font></p><br>';
}

$Export = $downtime.$downok.$passerror;
if(isset($_POST['url']) && ($_POST['password'] == $password))
{
$filename = $Archives;
$somecontent = $Language[11].': '.$url."\r\n".$Language[2].": ".$runtime->spent().$Language[3].": ".$headers["Content-Length"].$Language[4]."\r\n".$Language[12].': '.date("Y-m-d H:i:s")."\r\n"."\r\n";
if (!file_exists($filename))
{
$echo_1 = $Language[18];
if (!fopen($filename, 'w'))
{
$echo_2 = $Language[19];
}
}
// 文件操作

if (is_writable($filename)) //判断是否可写
{
if (!$handle = fopen($filename, 'a+')) //打开文件
{
$echo_3 = $Language[9].$filename; //当打不开时
}
else
{
if (fwrite($handle, $somecontent) === false)//写入
{
$echo_4 = $Language[10].$filename;
} else
{
$echo_5 = $Language[15];
}
fclose($handle);//关闭连接
}
}
else
{
$echo_6 = $Language[17];
}
}
$echo = $echo_1.$echo_2.$echo_3.$echo_4.$echo_5.$echo_6;
?>

<?php echo $Export; ?>
<p><font color="blue"><?php echo $echo; ?></font></p>
</body>
</html>
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