这篇文章主要介绍了摘自织梦CMS的HTTP文件下载类,涉及php发送http请求、响应、传输等常用操作技巧,具有一定参考借鉴价值,需要的朋友可以参考下
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：
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"];
$this->BaseUrlPath = preg_replace("/\/([^\/]*)\.(.*)$/","http://www.jb51.net/",$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 = "http://www.jb51.net/";
$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
希望本文所述对大家的php程序设计有所帮助。
