PHP 文件下载 显示进度条

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+"&>进度条和下载文件,创建标志文件
    
    //$.ajax("download.php? + 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 >;
    $request=$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?>
    }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);
    

?>

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