DedeHttpDownPHP远程下载网页的类，增强版2013-1-17修改_PHP教程
内容导读
互联网集市收集整理的这篇技术教程文章主要介绍了DedeHttpDownPHP远程下载网页的类，增强版2013-1-17修改_PHP教程，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含11259字，纯文字阅读大概需要17分钟。
内容图文
1）新增远程主机判断，节约服务器资源。避免远程主机不存在的时候仍旧fsockopen，导致的死机占用服务器CPU
（2）新增响应401的判断和支持。
（3）增加对json返回文本的支持。
（4）日志的生成，如果设置了DEBUG_LEVEL且为TRUE则会对每次远程下载做日志。
（5）获取字节的限定dataLimit，节约服务器资源。
（6）修改日期：2013-1-17
如果还有更好的方法建议，可以随时联系我本人。admin@zbphp.com
[php]
m_url = $url;
if(is_array($urls))
{
$this->m_host = $urls["host"];
if(!emptyempty($urls["scheme"]))
{
$this->m_scheme = $urls["scheme"];
}
if(!emptyempty($urls["user"]))
{
$this->m_user = $urls["user"];
}
if(!emptyempty($urls["pass"]))
{
$this->m_pass = $urls["pass"];
}
if(!emptyempty($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);
}
}
/**
* 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->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 $url 地址
* @return string
*/
function JumpOpenUrl($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|401)/",$this->GetHead("http-state")) && preg_match("/text|xml|json/i",$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() { $tm1 = microtime(true); if(!$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; } /** * 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]." $httpv\r\n"; } if($this->m_user || $this->m_pass) { $headString .= "Authorization: Basic ".base64_encode($this->m_user.":".$this->m_pass)."\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["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-alive\r\n"; $headString.="Accept-Language:zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3\r\n"; $headString.="Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n"; foreach($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
http://www.bkjia.com/PHPjc/477811.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/477811.htmlTechArticle1）新增远程主机判断，节约服务器资源。避免远程主机不存在的时候仍旧fsockopen，导致的死机占用服务器CPU （2）新增响应401的判断和支持...
内容总结
以上是互联网集市为您收集整理的DedeHttpDownPHP远程下载网页的类，增强版2013-1-17修改_PHP教程全部内容，希望文章能够帮你解决DedeHttpDownPHP远程下载网页的类，增强版2013-1-17修改_PHP教程所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。
内容备注
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。
内容手机端
扫描二维码推送至手机访问。
来源：【匿名】