php远程下载类分享_

1、php远程下载类分享_ 本文实例为大家分享了php远程下载类，如下 ?php /* * 下载远程文件类支持断点续传 */ class HttpDownload private $m_url = ; private $m_urlpath = ; private $m_scheme = http; private $m_host = ; private $m_port = 80; private $m_user = ; private $m_pass = ; private $m_path = /; private $m_query = ; private $m_fp = ; private $m

2、_error = ; private $m_httphead = ; private $m_html = ; /* * 初始化 */ public function PrivateInit($url) $urls = ; $urls = parse_url($url); $this-m_url = $url; if(is_array($urls) $this-m_host = $urlshost; if(!empty($urlsscheme) $this-m_scheme = $urlsscheme; if(!empty($urlsuser) $this-m_user = $urlsuser;

3、 if(!empty($urlspass) $this-m_pass = $urlspass; if(!empty($urlsport) $this-m_port = $urlsport; if(!empty($urlspath) $this-m_path = $urlspath; $this-m_urlpath = $this-m_path; if(!empty($urlsquery) $this-m_query = $urlsquery; $this-m_urlpath .= ?.$this-m_query; /* * 打开指定网址 */ function OpenUrl($url) #重

4、设各参数 $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 = ; $this-m_httphead = ; $this-m_html = ; $this-Close(); #初始化系统 $this-PrivateInit($url); $this-PrivateStartSession()

5、; /* * 获得某操作错误的缘由 */ public function printError() echo 错误信息：.$this-m_error; echo 具体返回头：br; foreach($this-m_httphead as $k=$v) echo $k = $v brrn; /* * 判别用Get方法发送的头的应答结果是否正确 */ public function IsGetOK() if( ereg(2,$this-GetHead(http-state) ) return true; else $this-m_error .= $this-GetHead(http-state)

6、. - .$this-GetHead(http-describe).br; return false; /* * 看看返回的网页是否是text类型 */ public function IsText() if (ereg(2,$this-GetHead(http-state) eregi(text,$this-GetHead(content-type) return true; else $this-m_error .= 内容为非文本类型br; return false; /* * 推断返回的网页是否是特定的类型 */ public function IsContentType($ctype)

7、 if (ereg(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).br; return false; /* * 用 HTTP 协议下载文件 */ public function SaveToBin($savefilename) if (!$this-IsGetOK() return false; if (feof($this-m_fp) $this-m

8、_error = 连接已经关闭！; return false; $fp = fopen($savefilename,w) or die(写入文件 $savefilename 失败！); while (!feof($this-m_fp) fwrite($fp,fgets($this-m_fp,256); fclose($this-m_fp); return true; /* * 保存网页内容为 Text 文件 */ public function SaveToText($savefilename) if ($this-IsText() $this-SaveBinFile($savefilenam

9、e); else return ; /* * 用 HTTP 协议获得一个网页的内容 */ public 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; /* * 开头 HTTP

10、会话 */ public function PrivateStartSession() if (!$this-PrivateOpenHost() $this-m_error .= 打开远程主机出错!; return false; if ($this-GetHead(http-edition)=HTTP/1.1) $httpv = HTTP/1.1; else $httpv = HTTP/1.0; fputs($this-m_fp,GET .$this-m_urlpath. $httpvrn); fputs($this-m_fp,Host: .$this-m_host.rn); fputs($t

11、his-m_fp,Accept: */*rn); fputs($this-m_fp,User-Agent: Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.2)rn); #HTTP1.1协议必需指定文档结束后关闭链接,否则读取文档时无法用法feof推断结束 if ($httpv=HTTP/1.1) fputs($this-m_fp,Connection: Closernrn); else fputs($this-m_fp,rn); $httpstas = fgets($this-m_fp,256); $httpstas = split( ,$ht

12、tpstas); $this-m_httpheadhttp-edition = trim($httpstas0); $this-m_httpheadhttp-state = trim($httpstas1); $this-m_httpheadhttp-describe = ; for ($i=2;$icount($httpstas);$i+) $this-m_httpheadhttp-describe .= .trim($httpstas$i); while (!feof($this-m_fp) $line = str_replace(,trim(fgets($this-m_fp,256);

13、if($line = ) break; if (ereg(:,$line) $lines = split(:,$line); $this-m_httpheadstrtolower(trim($lines0) = trim($lines1); /* * 获得一个Http头的值 */ public function GetHead($headname) $headname = strtolower($headname); if (isset($this-m_httphead$headname) return $this-m_httphead$headname; else return ; /* *

14、 打开连接 */ public function PrivateOpenHost() if ($this-m_host=) return false; $this-m_fp = fsockopen($this-m_host, $this-m_port, $errno, $errstr,10); if (!$this-m_fp) $this-m_error = $errstr; return false; else return true; /* * 关闭连接 */ public function Close() fclose($this-m_fp); #两种用法方法，分别如下： #打开网页 $httpdown = new HttpDownload