清华大佬耗费三个月吐血整理的几百G的资源,免费分享!....>>>
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | <?php /* * PHP下载断点续传 * from:php100 */ function dl_file_resume( $file ){ //检测文件是否存在 if (! is_file ( $file )) { die ( "<b>404 File not found!</b>" ); } $len = filesize ( $file ); //获取文件大小 $filename = basename ( $file ); //获取文件名字 $file_extension = strtolower ( substr ( strrchr ( $filename , "." ),1)); //获取文件扩展名 //根据扩展名 指出输出浏览器格式 switch ( $file_extension ) { case "exe" : $ctype = "application/octet-stream" ; break ; case "zip" : $ctype = "application/zip" ; break ; case "mp3" : $ctype = "audio/mpeg" ; break ; case "mpg" : $ctype = "video/mpeg" ; break ; case "avi" : $ctype = "video/x-msvideo" ; break ; default : $ctype = "application/force-download" ; } //Begin writing headers header( "Cache-Control:" ); header( "Cache-Control: public" ); //设置输出浏览器格式 header( "Content-Type: $ctype" ); if ( strstr ( $_SERVER [ 'HTTP_USER_AGENT' ], "MSIE" )) { //如果是IE浏览器 # workaround for IE filename bug with multiple periods / multiple dots in filename # that adds square brackets to filename - eg. setup.abc.exe becomes setup[1].abc.exe $iefilename = preg_replace( '/\\./' , '%2e' , $filename , substr_count( $filename , '.' ) - 1); header( "Content-Disposition: attachment; filename=\\" $iefilename \\ "" ); } else { header( "Content-Disposition: attachment; filename=\\" $filename \\ "" ); } header( "Accept-Ranges: bytes" ); $size = filesize ( $file ); //如果有$_SERVER['HTTP_RANGE']参数 if (isset( $_SERVER [ 'HTTP_RANGE' ])) { /* --------------------------- Range头域 Range头域可以请求实体的一个或者多个子范围。例如, 表示头500个字节:bytes=0-499 表示第二个500字节:bytes=500-999 表示最后500个字节:bytes=-500 表示500字节以后的范围:bytes=500- 第一个和最后一个字节:bytes=0-0,-1 同时指定几个范围:bytes=500-600,601-999 但是服务器可以忽略此请求头,如果无条件GET包含Range请求头,响应会以状态码206(PartialContent)返回而不是以200 (OK)。 ---------------------------*/ // 断点后再次连接 $_SERVER['HTTP_RANGE'] 的值 bytes=4390912- list( $a , $range )= explode ( "=" , $_SERVER [ 'HTTP_RANGE' ]); //if yes, download missing part str_replace ( $range , "-" , $range ); //这句干什么的呢。。。。 $size2 = $size -1; //文件总字节数 $new_length = $size2 - $range ; //获取下次下载的长度 header( "HTTP/1.1 206 Partial Content" ); header( "Content-Length: $new_length" ); //输入总长 header( "Content-Range: bytes $range$size2/$size" ); //Content-Range: bytes 4908618-4988927/4988928 95%的时候 } else { //第一次连接 $size2 = $size -1; header( "Content-Range: bytes 0-$size2/$size" ); //Content-Range: bytes 0-4988927/4988928 header( "Content-Length: " . $size ); //输出总长 } //打开文件 $fp = fopen ( "$file" , "rb" ); //设置指针位置 fseek ( $fp , $range ); //虚幻输出 while (! feof ( $fp )){ //设置文件最长执行时间 set_time_limit(0); print( fread ( $fp ,1024*8)); //输出文件 flush (); //输出缓冲 ob_flush(); } fclose( $fp ); exit ; } dl_file_resume( "1.zip" ); //同级目录的1.zip 文件 //--------------------------------------- //不支持断点续传的文件下载。 //--------------------------------------- downFile( "1.zip" ); function downFile( $sFilePath ) { if ( file_exists ( $sFilePath )){ $aFilePath = explode ( "/" , str_replace ( "\\\\" , "/" , $sFilePath ), $sFilePath ); $sFileName = $aFilePath [ count ( $aFilePath )-1]; $nFileSize = filesize ( $sFilePath ); header ( "Content-Disposition: attachment; filename=" . $sFileName ); header ( "Content-Length: " . $nFileSize ); header ( "Content-type: application/octet-stream" ); readfile( $sFilePath ); } else { echo ( "文件不存在!" ); } } ?> //该片段来自于http://www.codesnippet.cn/detail/24112012641.html |