我要做导入导出功能,为了界面友好,提示时想出线进度条显示进度,但我不知道怎么做!
我的导入是导入csv格式的文件,直接读取,然后 insert into 数据表中,导出也是直接查询生成csv格式文件,
我能做了一个进度条,但是不知道怎么来获取导入导出执行的进度,然后再通过ajax及js更新我的进度条。
回复讨论(解决方案)
客户端支持,通过
sliverlight,flash,html5
或者服务器端,你查apc扩展,,好像还一个,忘记名字了
这个用ajax很容易实现,你可以查下相关资料
假如有100个操作,你可以让第一个操作前进1,第二个操作前进3 ...
我建议不要做这个进度条效果,因为可能影响速度
只要弄一个"导入中"
使用缓存输出吧
// 省略其他html+js进度条代码$i = 0;while($i<100) { // 执行内容 sleep(1); // 根据总量和当前任务计算任务进度$i $i = $i++; echo '<script>进度条变更js到'.$i.'</script>'; ob_flash() flash();}
<?php// 进度条演示代码,页面输出ob_start();header('Content-Type: text/html;charset=utf-8');echo '当前任务进度:<span id="p">0%</span>';echo str_repeat(' ', 4096);ob_flush();flush();// 执行任务$i = 0;while($i<100) { // 执行内容 sleep(1); // 根据总量和当前任务计算任务进度$i $i++; echo '<script type="text/javascript">document.getElementById(\'p\').innerHTML = "'.$i.'%";</script>'; ob_flush(); flush();}
我以前做采集的时候写的,ie下有用,chrome下试了下进度不跑,懒得该了
http://devp.cosrc.com/scroll2.php
很不错,很强>>>
PHP code
// 省略其他html+js进度条代码
$i = 0;
while($i // 执行内容
sleep(1);
// 根据总量和当前任务计算任务进度$i
$i = $i++;
echo '<script>进度条变更js到'.$i.'</script>';
ob_flash()
flash();
}
我会做进度条,关键是我不会这一步 “// 根据总量和当前任务计算任务进度$i”
我查询怎么做这一步呢?
引用 6 楼 hnxxwyq 的回复:
PHP code
// 省略其他html+js进度条代码
$i = 0;
while($i // 执行内容
sleep(1);
// 根据总量和当前任务计算任务进度$i
$i = $i++;
echo '<script>进度条变更js到'.$i.'</script>';
ob_flash()
flash();
}
……
通常这种进度条是这样做的
先获取整体任务,然后以一个维度来量化,再随时取当前进度,除以整体的,再化整
比如一个文件内有x行要读入,那么虽然每行内容大小不一,但可以看做计算完每行算完成总体进度1/x
那么如果要每处理完一行,就要响应不断的查询和进行一个输出,会影响性能的,而且你的导入方式必须能够量化每一步
比如这样
$file_size=文件内数据行数;
$current=0; //第一行,开始
while (没处理完)
{
导入一行;
$current++;
输出 $current/$file_size * 100;
//继续
}
显而易见,这得你的处理是逐步的....如果你是用某种现成的直接导入导出文件的函数,你根本不会获取到中间执行的过程.
引用 6 楼 hnxxwyq 的回复:
PHP code
// 省略其他html+js进度条代码
$i = 0;
while($i // 执行内容
sleep(1);
// 根据总量和当前任务计算任务进度$i
$i = $i++;
echo '<script>进度条变更js到'.$i.'</script>';
ob_flash()
flash();
}
……
导入时,你可以计算下csv的总行数n,然后每次固定读取m行(可以根据你的认为的效率修正),每次处理m行,则记录一次执行任务次数i,最后的进度比就是 floor(i*m / n) * 100;
伪代码
<?php$n = '总任务量';$m = '批次任务执行量';$i = 0;while($i * $m < $n) { // 处理m个执行量的内容 // 统计执行任务量 $total = ++$i * $m; // 计算进度比 $p = floor(min($total, $n) / $n);}
引用 10 楼 wxhbbdd 的回复:
引用 6 楼 hnxxwyq 的回复:
PHP code
// 省略其他html+js进度条代码
$i = 0;
while($i // 执行内容
sleep(1);
// 根据总量和当前任务计算任务进度$i
$i = $i++;
echo '<script>进度条变更js到'.$i.'</script>';
ob……
$n = '总任务量';
$m = '批次任务执行量';
$i = 0;
while($i * $m // 处理m个执行量的内容
// 统计执行任务量
$total = ++$i * $m;
// 计算进度比
$p = floor(min($total, $n) / $n * 100); // 少乘了个100
}
APC实现方法:
安装APC,参照官方文档安装,可以使用PECL模块安装方法快速简捷,这里不说明
配置php.ini,设置参数 apc.rfc1867=1 ,使APC支持上传进度条功能,在APC源码说明文档里面有说明
代码范例:
if ($_SERVER['REQUEST_METHOD'] == 'POST') { //上传请求
$status = apc_fetch('upload_' . $_POST['APC_UPLOAD_PROGRESS']);
$status['done'] = 1;
echo json_encode($status); //输出给用户端页面里的ajax调用,相关文档请自己寻找
exit;
} elseif (isset($_GET['progress_key'])) { //读取上传进度
$status = apc_fetch('upload_'.$_GET['progress_key']);
echo json_encode($status);
exit;
} else {
//其他代码,比如上传表单等
}
uploadprogress 模块实现方法:
使用PECL模块安装方法安装该模块
php.ini里面设置 uploadprogress.file.filename_template = “/tmp/upd_%s.txt”
代码范例:
if($_SERVER['REQUEST_METHOD']=='POST') {
if (is_uploaded_file($_FILES['upfile']['tmp_name'])) {
$upload_dir = 'your_path/';
$ext = strrchr($_FILES['video']['name'], '.');
$sessid = $_POST['UPLOAD_IDENTIFIER'] ;
$tmpfile = $upload_dir . $sessid;
$sessfile = $upload_dir . $sessid .$ext;
if (move_uploaded_file($_FILES['upfile']['tmp_name'],$tmpfile)) {
//上传成功
} else {
//上传失败
} else {
//上传错误
} elseif (!empty($_GET['sessid'])) {
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
header("Content-Type:text/html;charset=UTF-8");
$unique_id = $_GET['sessid'];
$uploadvalues = uploadprogress_get_info($unique_id);
if (is_array($uploadvalues)) {
echo json_encode($uploadvalues);
} else {
//读取进度失败,另外处理逻辑
}
} else {
//显示上传表单
}
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