PHP 文件下载 显示进度条

2023-03-06 16:41:04

前台调用：js调用：

function downloadfile(id,name,price,curcount_pricelimit){

    Date.prototype.Format = function(fmt) { //author: meizz

        var o = {

            "M+": this.getMonth() + 1, //月份

            "d+": this.getDate(), //日

            "h+": this.getHours(), //小时

            "m+": this.getMinutes(), //分

            "s+": this.getSeconds(), //秒

            "q+": Math.floor((this.getMonth() + 3) / 3), //季度

            "S": this.getMilliseconds() //毫秒

        };

        if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));

        for (var k in o)

            if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));

        return fmt;

    }

    var time = new Date().Format("yyyy-MM-dd-hh-mm-ss");

    var fileName = name + "_" + time + ".txt";

    //alert(fileName);

    window.open("downloadfile.php?fileName=" + fileName+"&id=" + id + "&name=" + name + "&price=" + price+"&curcount_pricelimit="+curcount_pricelimit); //进度条和下载文件,创建标志文件

    //$.ajax("download.php?id=" + id + "&name=" + name + "&price=" + price + "&fileName=" + fileName); //生成文件

}

php 调用:

echo "<a style='color:blue' onclick=\"downloadfile(".$values['id'].",'".$values['name']."',".$values['lowest_price'].",".$values['curcount_pricelimit'].")\" href='javascript:viod(0)'  target=_blank>下载</a>";

下载文件：download.php

<?php

    //下载数据

    header('Content-Type:text/html;charset=utf-8');

    //$filePath="/minbao/data/amazon/data/";

    $filePath = "d:/www/amazon/data/";//此处给出你下载的文件在服务器的什么地方

    $crawlId=$_GET['id'];

    $price=$_GET['price'];//最低价格

    $name=urldecode($_GET['name']);

    $name=iconv("utf-8","gb2312",$name);//解决乱码

    $time=date("Y-m-d-H-i-s");

    //导出sql语句：Select pid,price Into OutFile 'F:/QQPCmgr/Desktop/Data_OutFile.txt' fields terminated by ',' From `t_product`

    //导出文件命名格式Crawl_ID_txt;

    $fileName=$_GET['fileName'];

    //删除文件

    if(file_exists($filePath.$fileName)){

        unlink($filePath.$fileName);

    }

    include_once('./mysql.php');

    $conndb=new ConnDB();

    $str="crawl_id='".$crawlId."' and price>='".$price."' ";

       //查询配置好的关键词

    $filterSqlStr='';

    $sql="select filterword from t_crawl_configuration where id=".$crawlId;

    $request=$conndb->queryarr($sql);

    if($request){

        if(strlen($request[0][0])>0)

            $filterSqlStr=" and name NOT REGEXP '".$request[0][0]."' ";

    }else{

        echo "error";

        exit;

    }

    $sql="select pid,price,name Into OutFile '".$filePath.$fileName."' fields terminated by ',' lines terminated by '\r\n' From `t_product` where ".$str.$filterSqlStr;

    //echo $sql;

    $request=$conndb->query($sql);

    if($request){

        /*echo "<script> window.location.href='download.php?id=".$crawlId."&file=".$saveFile."';</script>";*/

    }else{

        echo "<script> alert('下载失败');</script>";

        exit;

    }

    //删除临时文件

    $tmpFiliName=$filePath."tmp".$fileName;//临时标志文件

    echo $tmpFiliName;

    if(file_exists($tmpFiliName)){

        unlink($tmpFiliName);

    }

//   此处给出你下载的文件名

//    $file = fopen($filePath.$fileName, "r"); //打开文件

//    //输入文件标签

//    header("Content-type:application/octet-stream ");

//    header("Accept-Ranges:bytes ");

//    header("Accept-Length:   " . filesize($filePath.$fileName));

//    header("Content-Disposition:   attachment;   filename= ".$fileName);

//

//    //输出文件内容

//    echo fread($file, filesize($filePath . $fileName));

//    fclose($file);

?>

进度条：downloadfile.php

<?php

header('Content-Type:text/html;charset=utf-8');

//$filePath="/minbao/data/amazon/data/";

$filePath="d:/www/amazon/data/";

$curcount_pricelimit = $_GET['curcount_pricelimit'];

$fileName = $_GET['fileName'];

$tmpFiliName=$filePath."tmp".$fileName;//临时标志文件

$crawlId=$_GET['id'];

$price=$_GET['price'];//最低价格

$name=urldecode($_GET['name']);

//防止执行超时

set_time_limit(0);

//清空并关闭输出缓存

ob_end_clean();

//需要循环的数据

if ($curcount_pricelimit/10000>0){

    $totalnumproduct=$curcount_pricelimit/10000;

}else{

    $totalnumproduct=10;

}

for($i = 0; $i < $totalnumproduct; $i++)

{

  $users[] = $fileName.'_' . $i;

}

//计算数据的长度

$total = count($users);

//显示的进度条长度，单位 px

$width = 500;

//每条记录的操作所占的进度条单位长度

$pix = $width / $total;

//默认开始的进度条百分比

$progress = 0;

?>

<html>

<head>

<title>下载提示</title>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<script src="./js/jquery-1.8.3.min.js"></script>

<style>

body,div input {

  font-family: Tahoma;

  font-size: 9pt

}

</style>

<script language="JavaScript">

 <!--

 function updateProgress(sMsg, iWidth,fsize)

 {

  //$("#downloaded").innerHTML=fsize+"KB";

  //alert(fsize);

  document.getElementById("downloaded").innerHTML =fsize+"KB";

  document.getElementById("status").innerHTML = sMsg;

  document.getElementById("progress").style.width = iWidth + "px";

  document.getElementById("percent").innerHTML = parseInt(iWidth / <?php echo $width; ?> * 100) + "%";

  }

 -->

 function setDownloaded(fsize) {

      fsize=fsize/1024;

      fsize=Math.round(fsize*100)/100;

      //alert(fsize);

      document.getElementById("downloaded").innerHTML =fsize+"KB";

 }

 </script>

</head>

<body>

    <table border="1" width="300">

      <tr>

        <td>已经生成</td>

        <td><div id="downloaded">0</div></td>

      </tr>

    </table>

  <div>

  <div style="margin:50px auto; padding: 8px; border: 1px solid gray; background: #EAEAEA; width: <?php echo $width+8; ?>px">

    <div style="padding: 0; background-color: white; border: 1px solid navy; width: <?php echo $width; ?>px">

      <div id="progress"

        style="padding: 0; background-color: #FFCC66; border: 0; width: 0px; text-align: center; height: 16px"></div>

    </div>

    <div id="status"></div>

    <div id="percent"

      style="position: relative; top: -30px; text-align: center; font-weight: bold; font-size: 8pt">0%</div>

  </div>

<?php

echo $tmpFiliName."<br />";

if(!file_exists($tmpFiliName)){

    echo "创建文件<br />";

    file_put_contents($tmpFiliName,'tmpContent') or die("Unable to open file!");

    if(file_exists($tmpFiliName)){

        echo "创建成功<br />";

        $url="download.php?id=".$crawlId."&name=".$name."&price=".$price."&fileName=".$fileName;

        echo $url."<br />";

        echo "<script>$.ajax('".$url."');</script>";

    }

}else{

    echo "临时标志文件已经存在!";

}

flush(); //将输出发送给客户端浏览器

$filesize=0;

foreach($users as $user)

{

      // 在此处使用空循环模拟较为耗时的操作，实际应用中需将其替换；

      // 如果你的操作不耗时，我想你就没必要使用这个脚本了 :)

     $cnt=0;

     if(file_exists($tmpFiliName)){

         if(file_exists($filePath.$fileName)){

              $file = fopen($filePath.$fileName, "rb");

              if ($file) {

                     $filesize=filesize($filePath.$fileName);

                     clearstatcache();

//                     echo $cnt++."、文件大小:".($filesize/1024)."KB<br>";

                     echo "<script>setDownloaded($filesize);</script>";//在前台显示已经下载文件大小

              }

         }

     }else{

         if(file_exists($filePath.$fileName)){

              $file = fopen($filePath.$fileName, "rb");

              if ($file) {

                     $filesize=filesize($filePath.$fileName);

                     clearstatcache();

//                     echo $cnt++."、文件大小:".($filesize/1024)."KB<br>";

                     echo "<script>setDownloaded($filesize);</script>";//在前台显示已经下载文件大小

              }

         }

         break;

     }

     //for($i=0;$i<1000000;$i++){

     //}

     flush();

     sleep(1);

     ?>

    <script language="JavaScript">

      updateProgress("正在生成数据文件 <?php echo $user; ?> ....", <?php echo min($width, intval($progress)); ?>,<?php echo $filesize/1024;?>);

    </script>

    <?php

      flush(); //将输出发送给客户端浏览器，使其可以立即执行服务器端输出的 JavaScript 程序。

      $progress += $pix;

} //end foreach 

?>

<script language="JavaScript">

  //最后将进度条设置成最大值 $width，同时显示操作完成

   updateProgress("数据文件生成完成！3秒后启动下载...", <?php echo $width; ?>,<?php echo round($filesize/1024,2);?>);

</script>

    <?php

    flush();

    sleep(3);

    ?>

<script language="JavaScript">

   window.location.href ="downloadfinish.php?filePath=<?php echo $filePath; ?>&fileName=<?php echo $fileName; ?>";

</script>

</script>

<?php

    flush();

    //删除临时文件

    if(file_exists($tmpFiliName)){

        unlink($tmpFiliName);

    }

?>

</body>

</html>

完成下载：downloadfinish.php

<?php

    $filePath=$_GET['filePath'];

    $fileName=$_GET['fileName'];

    //此处给出你下载的文件名

    $file = fopen($filePath.$fileName, "r"); //打开文件

    //输入文件标签

    header("Content-type:application/octet-stream ");

    header("Accept-Ranges:bytes ");

    header("Accept-Length:   " . filesize($filePath.$fileName));

    header("Content-Disposition:   attachment;   filename= ".$fileName);

    //输出文件内容

    echo fread($file, filesize($filePath . $fileName));

    fclose($file);

?>
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