摘自织梦CMS的HTTP文件下载类

本文实例讲述了摘自织梦CMS的HTTP 文件下载类。分享给大家供大家参考。具体如下：

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<?php if(!defined('DEDEINC')) exit("Request Error!");

/**

* 织梦HTTP下载类

*

* @version $Id: dedehttpdown.class.php 1 11:42 2010年7月6日Z tianya $

* @package DedeCMS.Libraries

* @license http://help.dedecms.com/usersguide/license.html

* @link http://www.dedecms.com

*/

@set_time_limit(0);

class DedeHttpDown

{

var $m_url = '';

var $m_urlpath = '';

var $m_scheme = 'http';

var $m_host = '';

var $m_port = '80';

var $m_user = '';

var $m_pass = '';

var $m_path = '/';

var $m_query = '';

var $m_fp = '';

var $m_error = '';

var $m_httphead = '';

var $m_html = '';

var $m_puthead = '';

var $BaseUrlPath = '';

var $HomeUrl = '';

var $reTry = 0;

var $JumpCount = 0;

/**

* 初始化系统

*

* @access public

* @param string $url 需要下载的地址

* @return string

*/

function PrivateInit($url)

{

if($url=='') {

return ;

}

$urls = '';

$urls = @parse_url($url);

$this->m_url = $url;

if(is_array($urls))

{

$this->m_host = $urls["host"];

if(!empty($urls["scheme"]))

{

$this->m_scheme = $urls["scheme"];

}

if(!empty($urls["user"]))

{

$this->m_user = $urls["user"];

}

if(!empty($urls["pass"]))

{

$this->m_pass = $urls["pass"];

}

if(!empty($urls["port"]))

{

$this->m_port = $urls["port"];

}

if(!empty($urls["path"]))

{

$this->m_path = $urls["path"];

}

$this->m_urlpath = $this->m_path;

if(!empty($urls["query"]))

{

$this->m_query = $urls["query"];

$this->m_urlpath .= "?".$this->m_query;

}

$this->HomeUrl = $urls["host"];

$this->BaseUrlPath = $this->HomeUrl.$urls["path"];

$this->BaseUrlPath = preg_replace("/\\/([^\\/]*)\\.(.*)$/","/",$this->BaseUrlPath);

$this->BaseUrlPath = preg_replace("/\\/$/","",$this->BaseUrlPath);

}

/**

* 重设各参数

*

* @access public

* @return void

*/

function ResetAny()

{

$this->m_url = "";

$this->m_urlpath = "";

$this->m_scheme = "http";

$this->m_host = "";

$this->m_port = "80";

$this->m_user = "";

$this->m_pass = "";

$this->m_path = "/";

$this->m_query = "";

$this->m_error = "";

}

/**

* 打开指定网址

*

* @access public

* @param string $url 地址

* @param string $requestType 请求类型

* @return string

*/

function OpenUrl($url,$requestType="GET")

{

$this->ResetAny();

$this->JumpCount = 0;

$this->m_httphead = Array() ;

$this->m_html = '';

$this->reTry = 0;

$this->Close();

//初始化系统

$this->PrivateInit($url);

$this->PrivateStartSession($requestType);

}

/**

* 转到303重定向网址

*

* @access public

* @param string $url 地址

* @return string

*/

function JumpOpenUrl($url)

{

$this->ResetAny();

$this->JumpCount++;

$this->m_httphead = Array() ;

$this->m_html = "";

$this->Close();

//初始化系统

$this->PrivateInit($url);

$this->PrivateStartSession('GET');

}

/**

* 获得某操作错误的原因

*

* @access public

* @return void

*/

function printError()

{

echo "错误信息：".$this->m_error;

echo " 具体返回头： ";

foreach($this->m_httphead as $k=>$v){ echo "$k => $v \\r\\n"; }

}

/**

* 判别用Get方法发送的头的应答结果是否正确

*

* @access public

* @return bool

*/

function IsGetOK()

{

if( preg_match("/^2/",$this->GetHead("http-state")) )

{

return TRUE;

}

else

{

$this->m_error .= $this->GetHead("http-state")." - ".$this->GetHead("http-describe")." ";

return FALSE;

}

/**

* 看看返回的网页是否是text类型

*

* @access public

* @return bool

*/

function IsText()

{

if( preg_match("/^2/",$this->GetHead("http-state")) && preg_match("/text|xml/i",$this->GetHead("content-type")) )

{

return TRUE;

}

else

{

$this->m_error .= "内容为非文本类型或网址重定向 ";

return FALSE;

}

/**

* 判断返回的网页是否是特定的类型

*

* @access public

* @param string $ctype 内容类型

* @return string

*/

function IsContentType($ctype)

{

if(preg_match("/^2/",$this->GetHead("http-state"))

&& $this->GetHead("content-type")==strtolower($ctype))

{ return TRUE; }

else

{

$this->m_error .= "类型不对 ".$this->GetHead("content-type")." ";

return FALSE;

}

/**

* 用Http协议下载文件

*

* @access public

* @param string $savefilename 保存文件名称

* @return string

*/

function SaveToBin($savefilename)

{

if(!$this->IsGetOK())

{

return FALSE;

}

if(@feof($this->m_fp))

{

$this->m_error = "连接已经关闭！"; return FALSE;

}

$fp = fopen($savefilename,"w");

while(!feof($this->m_fp))

{

fwrite($fp, fread($this->m_fp, 1024));

}

fclose($this->m_fp);

fclose($fp);

return TRUE;

}

/**

* 保存网页内容为Text文件

*

* @access public

* @param string $savefilename 保存文件名称

* @return string

*/

function SaveToText($savefilename)

{

if($this->IsText())

{

$this->SaveBinFile($savefilename);

}

else

{

return "";

}

/**

* 用Http协议获得一个网页的内容

*

* @access public

* @return string

*/

function GetHtml()

{

if(!$this->IsText())

{

return '';

}

if($this->m_html!='')

{

return $this->m_html;

}

if(!$this->m_fp||@feof($this->m_fp))

{

return '';

}

while(!feof($this->m_fp))

{

$this->m_html .= fgets($this->m_fp,256);

}

@fclose($this->m_fp);

return $this->m_html;

}

/**

* 开始HTTP会话

*

* @access public

* @param string $requestType 请求类型

* @return string

*/

function PrivateStartSession($requestType="GET")

{

if(!$this->PrivateOpenHost())

{

$this->m_error .= "打开远程主机出错!";

return FALSE;

}

$this->reTry++;

if($this->GetHead("http-edition")=="HTTP/1.1")

{

$httpv = "HTTP/1.1";

}

else

{

$httpv = "HTTP/1.0";

}

$ps = explode('?',$this->m_urlpath);

$headString = '';

//发送固定的起始请求头GET、Host信息

if($requestType=="GET")

{

$headString .= "GET ".$this->m_urlpath." $httpv\\r\\n";

}

else

{

$headString .= "POST ".$ps[0]." $httpv\\r\\n";

}

$this->m_puthead["Host"] = $this->m_host;

//发送用户自定义的请求头

if(!isset($this->m_puthead["Accept"]))

{

$this->m_puthead["Accept"] = "*/*";

}

if(!isset($this->m_puthead["User-Agent"]))

{

$this->m_puthead["User-Agent"] = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2)";

}

if(!isset($this->m_puthead["Refer"]))

{

$this->m_puthead["Refer"] = "http://".$this->m_puthead["Host"];

}

foreach($this->m_puthead as $k=>$v)

{

$k = trim($k);

$v = trim($v);

if($k!=""&&$v!="")

{

$headString .= "$k: $v\\r\\n";

}

fputs($this->m_fp, $headString);

if($requestType=="POST")

{

$postdata = "";

if(count($ps)>1)

{

for($i=1;$i<count($ps);$i++)

{

$postdata .= $ps[$i];

}

else

{

$postdata = "OK";

}

$plen = strlen($postdata);

fputs($this->m_fp,"Content-Type: application/x-www-form-urlencoded\\r\\n");

fputs($this->m_fp,"Content-Length: $plen\\r\\n");

}

//发送固定的结束请求头

//HTTP1.1协议必须指定文档结束后关闭链接,否则读取文档时无法使用feof判断结束

if($httpv=="HTTP/1.1")

{

fputs($this->m_fp,"Connection: Close\\r\\n\\r\\n");

}

else

{

fputs($this->m_fp,"\\r\\n");

}

if($requestType=="POST")

{

fputs($this->m_fp,$postdata);

}

//获取应答头状态信息

$httpstas = explode(" ",fgets($this->m_fp,256));

$this->m_httphead["http-edition"] = trim($httpstas[0]);

$this->m_httphead["http-state"] = trim($httpstas[1]);

$this->m_httphead["http-describe"] = "";

for($i=2;$i<count($httpstas);$i++)

{

$this->m_httphead["http-describe"] .= " ".trim($httpstas[$i]);

}

//获取详细应答头

while(!feof($this->m_fp))

{

$line = trim(fgets($this->m_fp,256));

if($line == "")

{

break;

}

$hkey = "";

$hvalue = "";

$v = 0;

for($i=0;$i<strlen($line);$i++)

{

if($v==1)

{

$hvalue .= $line[$i];

}

if($line[$i]==":")

{

$v = 1;

希望本文所述对大家的php程序设计有所帮助。

摘自织梦CMS的HTTP文件下载类

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