php远程下载类分享

2020-03-22 16:58:04

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$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; * 打开指定网址 function OpenUrl($url) { #重设各参数 $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); $this- PrivateStartSession(); * 获得某操作错误的原因 public function printError() { echo "错误信息：".$this- m_error; echo "具体返回头： br foreach($this- m_httphead as $k= $v) { echo "$k = $v br /r/n"; * 判别用Get方法发送的头的应答结果是否正确 public function IsGetOK() { if( ereg("^2",$this- GetHead("http-state")) ) { return true; } else { $this- m_error .= $this- GetHead("http-state")." - ".$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 { $this- m_error .= "内容为非文本类型 br return false; * 判断返回的网页是否是特定的类型 public function IsContentType($ctype) { 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_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()) { $this- SaveBinFile($savefilename); } 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 $this- m_html; * 开始 HTTP 会话 public function PrivateStartSession() { if (!$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." $httpv/r/n"); fputs($this- m_fp,"Host: ".$this- m_host."/r/n"); fputs($this- m_fp,"Accept: */*/r/n"); fputs($this- m_fp,"User-Agent: Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.2)/r/n"); #HTTP1.1协议必须指定文档结束后关闭链接,否则读取文档时无法使用feof判断结束 if ($httpv=="HTTP/1.1") { fputs($this- m_fp,"Connection: Close/r/n/r/n"); } else { fputs($this- m_fp,"/r/n"); $httpstas = fgets($this- m_fp,256); $httpstas = split(" ",$httpstas); $this- m_httphead["http-edition"] = trim($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[$i]); while (!feof($this- m_fp)) { $line = str_replace("/"","",trim(fgets($this- m_fp,256))); if($line == "") break; if (ereg(":",$line)) { $lines = split(":",$line); $this- m_httphead[strtolower(trim($lines[0]))] = trim($lines[1]); * 获得一个Http头的值 public function GetHead($headname) { $headname = strtolower($headname); if (isset($this- m_httphead[$headname])) { return $this- m_httphead[$headname]; } else { return ""; * 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); #两种使用方法，分别如下： #打开网页 $httpdown = new HttpDownload(); $httpdown- OpenUrl("http://www.google.com.hk"); echo $httpdown- GetHtml(); $httpdown- Close();
$file = new HttpDownload(); # 实例化类 $file- OpenUrl("http://dldir1.qq.com/qqfile/qq/QQ8.2/17724/QQ8.2.exe"); # 远程文件地址 $file- SaveToBin("qq.exe"); # 保存路径及文件名 $file- Close(); # 释放资源以上就是本文的全部内容，希望对大家的学习有所帮助。PHP教程

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