php远程下载类分享
发布:smiling 来源: PHP粉丝网 添加日期:2019-09-29 16:56:03 浏览: 评论:0
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_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 = $urls["host"];
- if(!emptyempty($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;
- }
- }
- }
- /**
- * 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();
- //phpfensi.com
- #下载文件
- $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
- $file->Close(); # 释放资源
- </count($httpstas);$i++)>
Tags: php下载类
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