* @copyright Copyright (c) 2007 - 2010, DesDev, Inc.
if(!emptyempty($urls["port"]))
{
$this->m_port = $urls["port"];
}
if(!emptyempty($urls["path"]))
{
$this->m_path = $urls["path"];
}
$this->m_urlpath = $this->m_path;
if(!emptyempty($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);
}
}
/**
* Reset each parameter
*
* @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 = "";
}
/**
* Open the specified URL
*
* @access public
* @param string $url address
* @param string $requestType request type
* @return string
*/
function OpenUrl($url,$requestType="GET")
{
$this->ResetAny();
$this->JumpCount = 0;
$this->m_httphead = Array() ;
$this->m_html = '';
$this->dataLimit = 0;
$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 $url address
* @return string
*/
function JumpOpenUrl($url)
{
$this->ResetAny();
$this->JumpCount++;
$this->m_httphead = Array();
$this->m_html = "";
$this->Close();
//Initialize the system
$this->PrivateInit($url);
$this->PrivateStartSession('GET');
}
/**
* Get the reason for an operation error
*
* @access public
* @return void
*/
function printError()
{
echo "Error message:".$this->m_error;
echo "
Specific return header:
";
foreach($this->m_httphead as $k=>$v){ echo "$k => $v
rn"; }
}
/**
* Determine whether the response result of the header sent using the Get method is correct
*
* @access public
* @return bool
*/
function IsGetOK()
{
if( preg_match("/^2/",$this->GetHead("http-state")) )
{
return TRUE;
} }
else
{
$this->m_error .= $this->GetHead("http-state")." - ".$this->GetHead("http-describe")."
";
return FALSE;
} }
}
/**
* Check whether the returned web page is of text type
*
* @access public
* @return bool
*/
function IsText()
{
If( preg_match("/^(2|401)/",$this->GetHead("http-state")) && preg_match("/text|xml|json/i",$this-> ;GetHead("content-type")) )
{
return TRUE;
} else {
$this->m_error .= "The content is non-text type or URL redirection
";
return FALSE;
} }
}
/**
* Determine whether the returned web page is of a specific type
*
* @access public
* @param string $ctype content type
* @return string
*/
function IsContentType($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;
}
}
/**
* Download files using HTTP protocol
*
* @access public
* @param string $savefilename Save file name
* @return string
*/
function SaveToBin($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;
}
/**
* Save web page content as Text file
*
* @access public
* @param string $savefilename Save file name
* @return string
*/
function SaveToText($savefilename)
{
if($this->IsText())
{
$this->SaveBinFile($savefilename);
}
else
{
return "";
}
}
/**
* Use Http protocol to obtain the content of a web page
*
* @access public
* @return string
*/
function GetHtml()
{
$tm1 = microtime(true);
if(!$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);
if($this->dataLimit > 0 && strlen($this->m_html) > $this->dataLimit) break;
}
@fclose($this->m_fp);
$tm2 = microtime(true);
$log = "ntm2-tm1 = ".($tm2-$tm1);
$log.= "n".$this->m_html;
$this->log_write('GetHtml',$log);
return $this->m_html;
}
/**
* Start HTTP session
*
* @access public
* @param string $requestType Request type
* @return string
*/
function PrivateStartSession($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." $httpvrn";
}
else
{
$headString .= "POST ".$ps[0]." $httpvrn";
}
if($this->m_user || $this->m_pass)
{
$headString .= "Authorization: Basic ".base64_encode($this->m_user.":".$this->m_pass)."rn";
}
$this->m_puthead["Host"] = $this->m_host;
//发送用户自定义的请求头
if(!isset($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"];
}
/* add on 2012-12-19 */
$headString.="Connection:keep-alivern";
$headString.="Accept-Language:zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3rn";
$headString.="Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8rn";
foreach($this->m_puthead as $k=>$v)
{
$k = trim($k);
$v = trim($v);
if($k!=""&&$v!="")
{
$headString .= "$k: $vrn";
}
}
fputs($this->m_fp, $headString);
if($requestType=="POST")
{
$postdata = "";
if(count($ps)>1)
{
for($i=1;$i
{
$postdata .= $ps[$i];
}
}
else
{
$postdata = "OK";
}
$plen = strlen($postdata);
fputs($this->m_fp,"Content-Type: application/x-www-form-urlencodedrn");
fputs($this->m_fp,"Content-Length: $plenrn");
}
//发送固定的结束请求头
//HTTP1.1协议必须指定文档结束后关闭链接,否则读取文档时无法使用feof判断结束
if($httpv=="HTTP/1.1")
{
fputs($this->m_fp,"Connection: Closernrn");
}
else
{
fputs($this->m_fp,"rn");
}
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
{
$this->m_httphead["http-describe"] .= " ".trim($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;$i
{
if($v==1)
{
$hvalue .= $line[$i];
}
if($line[$i]==":")
{
$v = 1;
}
if($v==0)
{
$hkey .= $line[$i];
}
}
$hkey = trim($hkey);
if($hkey!="")
{
$this->m_httphead[strtolower($hkey)] = trim($hvalue);
}
}
//如果连接被不正常关闭，重试
if(feof($this->m_fp))
{
if($this->reTry > 10)
{
return FALSE;
}
$this->PrivateStartSession($requestType);
}
//判断是否是3xx开头的应答
if(preg_match("/^3/",$this->m_httphead["http-state"]))
{
if($this->JumpCount > 3)
{
return;
}
if(isset($this->m_httphead["location"]))
{
$newurl = $this->m_httphead["location"];
if(preg_match("/^http/i",$newurl))
{
$this->JumpOpenUrl($newurl);
}
else
{
$newurl = $this->FillUrl($newurl);
$this->JumpOpenUrl($newurl);
}
}
else
{
$this->m_error = "无法识别的答复！";
}
}
}
/**
* Get the value of an HTTP header
*
* @access public
* @param string $headname Header file name
* @return string
*/
function GetHead($headname)
{
$headname = strtolower($headname);
return isset($this->m_httphead[$headname]) ? $this->m_httphead[$headname] : '';
}
/**
* Set the value of Http header
*
* @access public
* @param string $skey key
* @param string $svalue value
* @return string
*/
function SetHead($skey,$svalue)
{
$this->m_puthead[$skey] = $svalue;
}
/**
* Open connection
*
* @access public
* @return bool
*/
function PrivateOpenHost()
{
if($this->m_host=="")
{
return FALSE;
}
if(function_exists('checkdnsrr') && !checkdnsrr($this->m_host,'A') && !checkdnsrr($this->m_host,'CNAME'))
{
$this->m_error = '远程主机'.$this->m_host.'不存在!checkdnsrr !';
return FALSE;
}
$errno = "";
$errstr = "";
$this->m_fp = @fsockopen($this->m_host, $this->m_port, $errno, $errstr,10);
if(!$this->m_fp)
{
$this->m_error = $errstr;
return FALSE;
}
else
{
return TRUE;
}
}
/**
* Close connection
*
* @access public
* @return void
*/
function Close()
{
@fclose($this->m_fp);
}
/**
* Complete relative URL
*
* @access public
* @param string $surl requires an incomplete address
* @return string
*/
function FillUrl($surl)
{
$i = 0;
$dstr = "";
$pstr = "";
$okurl = "";
$pathStep = 0;
$surl = trim($surl);
if($surl=="")
{
return "";
}
$pos = strpos($surl,"#");
if($pos>0)
{
$surl = substr($surl,0,$pos);
}
if($surl[0]=="/")
{
$okurl = "http://".$this->HomeUrl.$surl;
}
else if($surl[0]==".")
{
if(strlen($surl)<=1)
{
return "";
}
else if($surl[1]=="/")
{
$okurl = "http://".$this->BaseUrlPath."/".substr($surl,2,strlen($surl)-2);
}
else
{
$urls = explode("/",$surl);
foreach($urls as $u)
{
if($u=="..")
{
$pathStep++;
}
else if($i
{
$dstr .= $urls[$i]."/";
}
else
{
$dstr .= $urls[$i];
}
$i++;
}
$urls = explode("/",$this->BaseUrlPath);
if(count($urls) <= $pathStep)
{
return "";
}
else
{
$pstr = "http://";
for($i=0;$i
{
$pstr .= $urls[$i]."/";
}
$okurl = $pstr.$dstr;
}
}
}
else
{
if(strlen($surl)<7)
{
$okurl = "http://".$this->BaseUrlPath."/".$surl;
}
else if(strtolower(substr($surl,0,7))=="http://")
{
$okurl = $surl;
}
else
{
$okurl = "http://".$this->BaseUrlPath."/".$surl;
}
}
$okurl = preg_replace("/^(http://)/i","",$okurl);
$okurl = preg_replace("//{1,}/", "/", $okurl);
return "http://".$okurl;
}
function log_write($funcname,$message)
{
if(!(defined('DEBUG_LEVEL') && DEBUG_LEVEL == TRUE)) return ;
$log = "n".date("Y-M-d H:i:s ").get_current_user()."[".getmypid()."]";
$log.= "n".$this->m_url."n".str_repeat('------', 10)."n".$message;
$path = $funcname.' '.date('Y m d H i s ').preg_replace('/([W]+|s+)/i', ' ', $this->m_url);
if(strlen($path) > 250) $path = substr($path,0,250);
$dir = DEDEDATA.'/httpdownlog';
if(!is_dir($dir) && !mkdir($dir)) exit('Can not make dir '.$dir);
$path = $dir.'/'.$path;
if(!file_exists($path)) touch($path);
$fp = fopen($path,'a+');
flock($fp, LOCK_EX);
fputs($fp, "PATH:".$path."nREAL:".realpath($path)."nMSSG:".$log);
fclose($fp);
return TRUE;
}
}//End Class
使用方法：
[php]
$dhd = new DeDeHttpDown();
$dhd->OpenUrl($Rs['wurl']);
$dhd->dataLimit = 5120;
$dhd->m_puthead["Refer"] = $Rs['wurl'];
$filecnt = trim($dhd->GetHtml());
存在未解决的问题：
（1）假如域名是绑定了A记录和CNAME，有ip指向，但是IP地址是不存在的或者虚假的，程序仍旧会继续获取。
（2）PHP的fsockopen 里面的time out貌似根本就没有起作用。设置了10s超时，但是根本就是执行到程序time out 为止。
如果好的方法建议，可以随时联系我本人。admin@zbphp.com
http://www.bkjia.com/PHPjc/477811.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/477811.htmlTechArticle1) Add remote host judgment to save server resources. Avoid fsockopen when the remote host does not exist, causing a crash and occupying the server CPU. (2) Added judgment and support for responding to 401...
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